Allen-Bradley Programmable Controllers | PLC-5 System

The PLC-5® processor module in a 1771 platform provides a proven approach for industrial control. PLC-5 processors are high-speed, single-slot processors used for control and information processing. They are designed for larger sequential and regulatory control applications with specialized I/O requirements and/or the need to coordinate with other processors and devices.

PLC-5 processors are available in a range of I/O capacity and memory size, and can be connected in a variety of networks for distributed processing and distributed I/O. The 1771 I/O products offer a full range of digital and analog I/O (including intelligent I/O) in a rugged modular assembly.

PLC-5 System

PLC-5 System Benefits

  • Modularity — Modular I/O and communication interfaces provide a configurable and expandable system. A system should be configured for the required number of I/O and the communication networks. Later, when system expansion is necessary, I/O or communication interfaces can be added.
  • Speed — Fast delivery of messages between networks, between links within networks, and between modules across the backplane.
  • Toughness — Industrially-hardened hardware platform is designed to withstand the vibrations, thermal extremes, and electrical noise associated with harsh industrial environments.
  • Broad I/O options — A large selection of 1771 I/O modules available for use in the local I/O chassis, and an even larger selection of I/O available at locations remote from the processor, can be connected across ControlNet™, DeviceNet™, and Remote I/O links.

Allen-Bradley PLC-5 System Overview

Product Design

PLC-5 processors are available in a range of forcible I/O (512 maximum through 3072 maximum) and maximum user memory (6K through 100K words). All are capable of controlling remotely located I/O. The maximum number of I/O locations remote from the processor ranges from 5 through 125. The processor can monitor/control these I/O across ControlNet, DeviceNet, and Remote I/O links.

The 1771 platform provides a rack-based modular assembly. The PLC-5 processors are single-slot modules that are placed into the left-most slot of a 1771 I/O chassis. For 1771 I/O in a location remote from the processor, the I/O adapter is a single-slot module that is placed into the left-most slot of a 1771 I/O chassis. Some 1771 I/O chassis are built for back-panel mounting and some are built for rack mounting. The 1771 I/O chassis is available in sizes of 1, 2, 4, 8, 12, or 16 I/O module slots. The 1771 I/O modules are available in densities of a maximum of 32 I/O per module. Mechanical keying of each I/O module to its backplane connector guards against inadvertently replacing a module with another module of a different type. Because external connections are terminated at a wiring arm that unplugs from the module, there is no need to disconnect wiring to replace an I/O module.

Power supply modules are available for installation in I/O module slots. Also stand-alone power supplies are available and can be mounted separately or directly on the left end of the 1771 I/O chassis.

Communication

A PLC-5 processor communicates across the 1771 backplane to 1771 I/O modules in the chassis in which the processor resides. The different models of PLC-5 processors have various on-board ports for communication with other processors, computers, and remotely located I/O. Also, separate modules are available to provide additional communication ports.

Each PLC-5 processor has a built-in RS-232/422/423 communication port. Each PLC-5 processor also has one or more on-board ports that can be configured for either Data Highway Plus (DH+) or Universal Remote I/O. As a Universal Remote I/O port, it can be configured as either an I/O scanner port or an I/O adapter port. Selected models of PLC-5 processors have on-board ports for Ethernet, ControlNet, or Extended Local I/O communication.

In addition to the on-board ports available with PLC-5 processors, adding another communication port for a PLC-5 processor is as simple as adding an optional communication module.

I/O adapter modules for 1771 I/O are available for ControlNet, Universal Remote I/O, and Extended Local I/O links. An I/O adapter module in a chassis with I/O modules interfaces the I/O modules with the I/O link for communication with a scanner port of a processor at another location.

Click to enlarge - 1771PLC5SimpleSysSetup_bw


Click to enlarge - 1771PLC5MultipleSysSetup_bw
System Components

A PLC-5 / 1771 control system at minimum consists of a processor module and I/O modules in a single 1771 chassis with a power supply. Choose the processor module with the on-board communication ports needed.

On-board Universal Remote I/O scanner ports are available on all PLC-5 processors. On-board Extended Local I/O scanner ports are available on some PLC-5 processors. On-board ControlNet ports are available on some PLC-5 processors. To provide a DeviceNet I/O scanner port to the system, a DeviceNet scanner module (1771-SDN) is necessary.

Typical Configurations

In this typical configuration, a ControlNet port on the processor module interfaces the processor to the ControlNet link. In each of the two chassis remote from the processor, a 1771-ACN15 I/O adapter module provides I/O modules in those chassis with an interface to the ControlNet link. The PLC-5 processor monitors/controls the I/O in its local I/O chassis as well as the I/O in the remote locations.

The 1771 power supply module plugs into an I/O module slot, or you can connect a stand-alone 1771 power supply to the left end of each chassis.

Click to enlarge - 1771PLC5SysTypConfg_bw

Allen-Bradley PLC-5 Processors Overview

The PLC-5® processors are single-slot modules that are placed into the left-most slot of a 1771 I/O chassis. They are available in a range of I/O, memory, and communication capability.PLC-5 Processors

PLC-5 processors have ports configurable for either a Data Highway Plus messaging communication link or a Universal Remote I/O link. As a Universal Remote I/O port, it can be configured as either an I/O scanner port or an I/O adapter port. As an I/O scanner port, it monitors and controls the I/O on the link by communicating with the I/O adapters for those I/O. As an adapter port, it communicates only with the I/O scanner port on the link, passing a maximum of one I/O rack of input and output data between the two to provide distributed processing.

All PLC-5 processors have Data Highway Plus and RS-232-C/422-A/423-A communication ports. In addition to these ports, each Ethernet PLC-5 processor has an Ethernet communication port, and each ControlNet PLC-5 processor has a ControlNet communication port.

Although each Ethernet PLC-5 processor has on-board Ethernet ports; additional Ethernet ports can be added to any PLC-5 processor system with a 1785-ENET Ethernet Interface Module. PLC-5 processors do not have an on-board DeviceNet port. A DeviceNet port can be added to the system with a 1771-SDN scanner module.

Benefits
  • Ladder-logic and structured-text programming
  • Advanced instruction set including file handling, sequencer, diagnostic, shift register, immediate I/O, and program control instructions
  • Multiple main control programs for segregation of control tasks
  • Processor input interrupts and global status flags
  • Programmable fault response for reacting to a fault before the system goes down
  • Timed interrupt routine for examining specific information at specific time intervals
  • Protected memory selectable by word on selected processors
  • 512 through 3072 maximum forcible I/O in any mix
  • Up to 50,176 maximum non-forcible I/O
  • Processor-resident local I/O (1771 I/O modules)
  • Extended-local I/O on selected processors (1771 I/O modules)
  • Universal Remote I/O (1746, 1771, and 1794 I/O modules and 1791 I/O blocks)
  • DeviceNet I/O (1794 I/O modules, 1792D I/O blocks)
  • ControlNet I/O on selected processors (1771, 1734, 1794, 1797 I/O modules)
  • Universal Remote I/O ports can be configured as either an I/O scanner port or an I/O adapter port
Specifications
Time-of-Day Clock/Calendar
Maximum Variations at 60 °C ± 5 min per month
Typical Variations at 20 °C ± 20s per month
Timing Accuracy 1 program scan
Battery 1770-XYC
Operating Shock 30 g peak acceleration for 11 ±1 ms duration
Nonoperating Shock 50 g peak acceleration for 11 ±1 ms duration
Vibration 1 g at 10…500 Hz
0.012 in. peak-to-peak displacement
Operating Temperature 0…60 °C (32…140 °F)
Nonoperating Temperature -40…85 °C (-40…185 °F)
Relative Humidity 5…95% noncondensing
Certifications⋆ UL, CSA Class I Div 2 Hazardous, CE, C-Tick, EEx, EtherNet/IPODVA
Selecting the Processor Category

Three categories of PLC-5 processor are available:

  • Standard — Standard PLC-5 processors feature versatile built-in communication options that permit development of a control architecture that is specific to an application, and an advanced programming instruction set.
  • Ethernet — Ethernet PLC-5 processors offer embedded TCP/IP communication capabilities that let them communicate with other Ethernet PLC-5 processors and host computers. They thus integrate Allen-Bradley architecture into the industry standard TCP/IP network, offering high-performance peer-to-peer communication via use of PLC-5 message instructions. Ethernet PLC-5 processors are optimized for real-time sequential and regulatory control.
  • ControlNet — ControlNet PLC-5 processors are used for control and information processing. They offer high-speed communication through a ControlNet port. The ControlNet network provides both I/O control faster than the Universal Remote I/O link and peer-to-peer communication faster than the DH+ network. These processors eliminate the need for block transfer programming when communicating with 1771 I/O modules on the ControlNet network that require a one-time configuration and then continuously read or write.

PLC-5 Processor Categories

Processor Category I/O, Max. I/O Chassis, Max. I/O Communication User Memory, Max. General
Communication Ports
Standard PLC-5 Processor 512 to 3072
(any mix)⋆
5 to 93⋆ •Processor-resident local I/O
•Extended local I/O
•Universal Remote I/O
•DeviceNet I/O‡
•8K to 100K words
•protected (PLC-5/26, -5/46, and -5/86 only)
•Ethernet§
•DH+
•RS-232-C/422-A/423-A
Ethernet
PLC-5 Processor
512 to 3072
(any mix)⋆
13 to 65⋆ •Processor-resident local I/O
•Universal Remote I/O
•DeviceNet I/O‡
•16K to 100K words •Ethernet
•DH+
•RS-232-C/422-A/423-A
ControlNet PLC-5 Processor Forcible
•512 to 3072 (any mix)⋆
Non-forcible
•3200 to 50176
77 to 125⋆ •Processor-resident local I/O
•Universal Remote I/O
•DeviceNet I/O‡
•ControlNet I/O
•6K to 100K words
•protected (PLC-5/46C only)
•Ethernet§
•ControlNet
•DH+
•RS-232-C/422-A/423-A
⋆ This does not include DeviceNet I/O.
‡ This type of I/O in this type of controller system requires a separate I/O scanner installed in an I/O module slot.
§ These are not on-board ports. They are available only through an interface installed in I/O module slot 0.
PLC-5 Processors

Standard PLC-5 Processors

  • Total I/O, Max. is the actual I/O circuits, regardless of the number of connection points or I/O image bits. The number of I/O image bits (8, 16, or 32) that correspond to an I/O module limit the number of I/O at that module; however, some modules may have less I/O than I/O image bits. This includes local I/O, extended local I/O, and Universal Remote I/O combined. This does not include DeviceNet I/O.
    Any mix means that any number of the I/O can be inputs and any number can be outputs, with no placement restrictions.
    Complementary means that to configure this many I/O, pairs of modules must have duplicate addresses. This pair must be either 2 output modules sharing the same output image bits or an input module and an output module complementing each other. In either case, module placement must conform to these restrictions.
  • I/O rack is an I/O addressing unit that can contain a max. of 128 I/O with unique addressing of I/O modules or 256 I/O with duplicate addressing of I/O modules.
Cat. No. Processor User Memory Words, Max.⋆ Memory Types Total I/O, Max. Analog I/O, Max. I/O Scan Time per Rack∆
Standard PLC-5 Processors
1785-L11B PLC-5/11 8K •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•512 (any mix) or
•384 in + 384 out (complementary)
512 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L20B PLC-5/20 16 kB •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•512 (any mix) or
•512 in + 512 out (complementary)
512 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L30B PLC-5/30 32K •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•1024 (any mix) or
•1024 in and 1024 out (complementary)
1024 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L40B PLC-5/40 48 kB‡ •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•2048 (any mix) or
•2048 in + 2048 out (complementary)
2048 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L40L PLC-5/40L 48K‡ •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•2048 (any mix) or
•2048 in + 2048 out (complementary)
2048 •0.5 ms (ext. local)
•10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L60B PLC-5/60 64 kB§ •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•3072 (any mix) or
•3072 in + 3072 out (complementary)
3072 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L60L PLC-5/60L 64 kB§ •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•3072 (any mix) or
•3072 in + 3072 out (complementary)
3072 •0.5 ms (ext. local)
•10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L80B PLC-5/80 100 kB♣ •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•3072 (any mix) or
•3072 in + 3072 out (complementary)
3072 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
Standard PLC-5 Processors with Protected Memories
1785-L26B PLC-5/26 16 kB •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•Protected
•512 (any mix) or
•512 in + 512 out (complementary)
512 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L46B PLC-5/46 48K‡ •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•Protected
•2048 (any mix) or
•2048 in + 2048 out (complementary)
2048 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L86B PLC-5/86 100 kB♣ •Battery-backed static RAM
•EEPROM program backup option using:
1785-ME16, -ME32, -ME64, and -M100
•Protected
•3072 (any mix) or
•3072 in + 3072 out (complementary)
3072 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
⋆ Max. number of data table words and max. number of timers and counters are user-configured.
‡ Limit of 32K words per data table file.
§ Limit of 32K words per data table file and 56K words per program file.
♣ Limit of 32K words per data table file and a total data table size of 64K words. Limit of 56K words per program file.
∆ In a single chassis, extended-local or remote. For Universal Remote I/O unless otherwise specified.

Standard PLC-5 Processors (continued)

Cat. No. Processor Universal Remote / Extended Local-I/O / DH+ Ports (Mode) Number of I/O Chassis, Max. RS-232-C / 422-A / 423-A Ports‡ Backplane Current Load @ 5V
Total Extended Local Universal Remote⋆
Standard PLC-5 Processors
1785-L11B PLC-5/11 1 DH+/Remote I/O (Adap or Scan) 5 0 4 1 2.3 A
1785-L20B PLC-5/20 1 DH+
1 DH+/Remote I/O (Adap or Scan)
13 0 12 2.3 A
1785-L30B PLC-5/30 2 DH+/Remote I/O (Adap or Scan) 29 0 28 2.3 A
1785-L40B PLC-5/40 4 DH+/Remote I/O (Adap or Scan) 61 0 32 max. per I/O link 3.3 A
1785-L40L PLC-5/40L 2 DH+/Remote I/O (Adap or Scan)
1 Extended Local I/O
61 16 32 max. per I/O link 3.3 A
1785-L60B PLC-5/60 4 DH+/Remote I/O (Adap or Scan) 93 0 32 max. per I/O link 3.3 A
1785-L60L PLC-5/60L 2 DH+/Remote I/O (Adap or Scan)
1 Extended Local I/O
81 16 32 max. per I/O link 3.3 A
1785-L80B PLC-5/80 4 DH+/Remote I/O (Adap or Scan) 93 0 32 max. per I/O link 3.3 A
Standard PLC-5 Processors with Protected Memories
1785-L26B PLC-5/26 1 DH+
1 DH+/Remote I/O (Adap or Scan)
13 0 12 1 2.3 A
1785-L46B PLC-5/46 4 DH+/Remote I/O (Adap or Scan) 61 0 32 max. per I/O link 3.3 A
1785-L86B PLC-5/86 4 DH+/Remote I/O (Adap or Scan) 93 0 32 max. per I/O link 3.3 A
⋆ Universal Remote I/O Chassis — any device with a remote I/O adapter port compatible with the Allen-Bradley Universal Remote I/O link. This includes 1771 I/O chassis, 1791 I/O blocks, PanelView displays, RediPANEL displays, Dataliner displays, 1336 drives.
‡ RS-422-A and RS-423-A both have a cable length limitation of 61 m (200 ft).

Ethernet and ControlNet PLC-5 Processors

  • Total I/O, Max. is the actual I/O circuits, regardless of the number of connection points or I/O image bits. The number of I/O image bits (8, 16, or 32) that correspond to an I/O module limit the number of I/O at that module; however, some modules may have less I/O than I/O image bits. This includes local I/O, ControlNet I/O, and Universal Remote I/O combined. This does not include DeviceNet I/O.
    Any mix means that any number of the I/O can be inputs and any number can be outputs, with no placement restrictions.
    Complementary means that to configure this many I/O, pairs of modules must have duplicate addresses. This pair must be either 2 output modules sharing the same output image bits or an input module and an output module complementing each other. In either case, module placement must conform to these restrictions.
  • I/O rack is an I/O addressing unit that can contain a max. of 128 I/O with unique addressing of I/O modules or 256 I/O with duplicate addressing of I/O modules.
Cat. No. Processor User Memory Words, Max.⋆ Memory Types Total I/O, Max. Analog I/O, Max. I/O Scan Time per Rack∆
Ethernet PLC-5 Processors
1785-L20E PLC-5/20E 16K •Battery-backed static RAM
•EEPROM program backup option using 1785-ME16, -ME32, and -ME64
•512 (any mix) or
•512 in + 512 out (complementary)
512 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L40E PLC-5/40E 48K‡ •Battery-backed static RAM
•EEPROM program backup option using 1785-ME16, -ME32, and -ME64
•2048 (any mix) or
•2048 in + 2048 out (complementary)
2048 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
1785-L80E PLC-5/80E 100K§ •Battery-backed static RAM
•EEPROM program backup option using 1785-ME16, -ME32, -ME64, -M100
•3072 (any mix) or
•3072 in + 3072 out (complementary)
3072 •10 ms at 57.6 kbit/s
•7 ms at 115.2 kbit/s
•3 ms at 230.4 kbit/s
ControlNet PLC-5 Processors
1785-L20C15 PLC-5/20C 16K •Battery-backed static RAM
•EEPROM program backup option using 1785-ME32, -ME64, and -M100
Forcible
•512 (any mix) or
•512 in + 512 out (complementary)
Non-forcible♦
•32000
Forcible
•512
Non-
forcible♦
•32000
ControlNet I/O
•0.5 ms (average)♠
Universal Remote I/O
•10 ms @ 57.6 kbit/s
•7 ms @ 115.2 kbit/s
•3 ms @ 230.4 kbit/s
1785-L40C15 PLC-5/40C 48K‡ •Battery-backed static RAM
•EEPROM program backup option using 1785-ME32, -ME64, and -M100
Forcible
•2048 (any mix) or
•2048 in + 2048 out (complementary)
Non-forcible♦
•48000
Forcible
•2048
Non-
forcible♦
•48000
ControlNet I/O
•0.5 ms (average)♠
Universal Remote I/O
•10 ms @ 57.6 kbit/s
•7 ms @ 115.2 kbit/s
•3 ms @ 230.4 kbit/s
1785-L80C15 PLC-5/80C 100K§ •Battery-backed static RAM
•EEPROM program backup option using 1785-ME32, -ME64, and -M100
Forcible
•3072 (any mix) or
•3072 in + 2048 out (complementary)
Non-forcible♦
•50176
Forcible
•3072
Non-
forcible♦
•50176
ControlNet I/O
•0.5 ms (average)♠
Universal Remote I/O
•10 ms @ 57.6 kbit/s
•7 ms @ 115.2 kbit/s
•3 ms @ 230.4 kbit/s
ControlNet PLC-5 Processors with Protected Memories
1785-L46C15 PLC-5/46C 48K‡ •Battery-backed static RAM
•EEPROM program backup option using 1785-ME32, -ME64, and -M100
•Protected
Forcible
•2048 (any mix) or
•2048 in + 2048 out (complementary)
Non-forcible♦
•48000
Forcible
•2048
Non-
forcible♦
•48000
ControlNet I/O
•0.5 ms (average)♠
Universal Remote I/O
•10 ms @ 57.6 kbit/s
•7 ms @ 115.2 kbit/s
•3 ms @ 230.4 kbit/s
⋆ Max. number of data table words and max. number of timers and counters are user-configured.
‡ Limit of 32K words per data table file.
§ Limit of 32K words per data table file and a total data table size of 64K words. Limit of 56K words per program file.
∆ In a single non-local chassis.
♦ Non forcible I/O is only available as ControlNet I/O.
♠ With several I/O chassis connected to the processor across a ControlNet link, the average I/O scan time per I/O rack in a single chassis is 0.5 ms. However the min. time for a complete ControlNet I/O scan (network update time) is 2 ms. Therefore, with a single I/O chassis connected to the processor across a ControlNet link, the min. I/O scan time for that single I/O chassis is 2 ms. Even with several I/O chassis connected to the processor across a ControlNet link, the min. time for an individual I/O chassis to be updated is 2 ms.

Ethernet and ControlNet PLC-5 Processors (continued)

Cat. No. Processor ControlNet / Ethernet / Remote / Extended Local-I/O / DH+ Ports (Mode) Number of I/O Chassis, Max. RS-232-C / 422-A / 423-A Ports♣ Backplane Current Load at 5V
Total⋆ Extended Local Universal Remote‡
Ethernet PLC-5 Processors
1785-L20E PLC-5/20E •1 Ethernet
•1 DH+
•1 DH+/Remote I/O (Adap or Scan)
13 0 12 1 3.6 A
1785-L40E PLC-5/40E •1 Ethernet
•2 DH+/Remote I/O (Adap or Scan)
61 0 60 1 3.6 A
1785-L80E PLC-5/80E •1 Ethernet
•2 DH+/Remote I/O (Adap or Scan)
65 0 64 1 3.6 A
ControlNet PLC-5 Processors
1785-L20C15 PLC-5/20C •1 ControlNet (dual media)
•1 DH+
•1 DH+/Remote I/O (Adap or Scan)
77 0 12 1 2.7 A (typ)
3.0 A (max)
1785-L40C15 PLC-5/40C •1 ControlNet (dual media)
•2 DH+/Remote I/O (Adap or Scan)
125 0 60 1 3.0 A
1785-L80C15 PLC-5/80C •1 ControlNet (dual media)
•2 DH+/Remote I/O (Adap or Scan)
125 0 60 1 3.0 A
ControlNet PLC-5 Processor with Protected Memory
1785-L46C15 PLC-5/46C •1 ControlNet (dual media)
•2 DH+/Remote I/O (Adap or Scan)
125 0 60 1 3.0 A
⋆ Limited by data-table size and how much data table you use for each chassis.
‡ Universal Remote I/O Chassis — any device with a remote I/O adapter port compatible with the Allen-Bradley Universal Remote I/O link. This includes 1771 I/O chassis, 1791 I/O blocks, PanelView displays, RediPANEL displays, Dataliner displays, 1336 drives.
§ The ControlNet I/O map table can contain up to 128 entries. Each map-table entry corresponds to one scheduled transfer of data.
♣ RS-422-A and RS-423-A both have a cable length limitation of 61m (200 ft).

Memory Devices

Cat. No. Description For this Product Function Memory Size
1785-ME16 EEPROM Standard PLC-5 processors Program backup 16K words
1785-ME32 EEPROM Standard PLC-5 processors Program backup 32K words
1785-ME64 EEPROM Standard PLC-5 processors Program backup 64K words
1785-M100 EEPROM Standard PLC-5 processors Program backup 100K words
PLC-5 Processor Backup System

Benefits

  • Easy to configure
  • Needs no additional programming for most systems
  • Applies state-of-the-art ControlNet services to enable synchronized scanning without the need for a dedicated connection
  • Offers redundant media for increased network availability
  • Performs equivalence checking of key structures and files to detect divergence automatically, without additional programming
  • Provides user-configurable file transfers of application-specific data for increased system integrity
  • Enables manual switch-over for ease of testing and troubleshooting
  • Records switch-over activity with time-stamping for subsequent diagnostics

Hot-Backup Memory Cartridge

Cat. No. Compatible Processors Memory Size
1785-CHBM 1785-L40C15 or 1785-L80C15 100K words

Typical Configuration for ControlNet PLC-5 Backup System

Click to enlarge - 1771PLC5CNetBackup_4C

Allen-Bradley PLC-5 Programmable Controllers Ordering data

PLC-5 Description
1771-A1B Allen Bradley PLC-5 Chassis 4 Slot Rack 1771A1B for Programmable Controllers
1771-A3B1 Allen Bradley PLC 5 Rack 12 Slot Chassis A3B1 Rockwell Automation I/O Rack
1771-ACNR15 AB Redun. Media ControlNet Interf. Module 1771AC 1771ACN 1771ACNR 1771ACNR1
1771-AF Allen Bradley Automation Fiber-Optic Converter Module for PLC-5 Automation
1771-AF1 Allen Bradley PLC-5 FIber Optic Converter Module Stand Alone 1771-AF 1771-AF1/B
1771-AL Allen Bradley PLC-5 Local Input/Output Adapter Module, 1771A for PLC-5
1771-ALX Allen Bradley PLC-5 Local I/O Adapter Module, 1771A 1771AL for Rockwell Automation
1771-ARC Allen Bradley PLC5 Remote I/O Adapter Module 1771ARC for Rockwell PLC-5
1771-CT 1771 I/O Chassis Cable For 1771-P4S, 6S Power Supply Allen Bradley Automation
1771-CX1 PLC-5 Family Local I/O Bus Terminator Cable 1771-C 1771-CX
1771-CX2 PLC-5 Local I/O Bus Terminator Cable Allen Bradley Automation 1771-CX2
1771-CX5 Rockwell Automation PLC-5 Local I/O Bus Terminator Cable 1771-C 1771-CX 1771-CX5
1771-DCM AB Direct Communication Module 1771D 1771DC for PLC-5 Programmable Controllers
1771-DLC PLC5 Encoder Input Module 1771DLC Allen Bradley Rockwell Automation CN 1771-DLC
1771-DMC AB Control PLC-5 Module 1771-DM 1771-D 1771 Rockwell Automation PLC-5
1771-E1C PLC5 Input Analog Expander Module 1771E1C 1771EIC Allen Bradley PLC-5 Module
1771-HS AB PLC5 Main SERVO 32K Memory 1771HS Memory for PLC-5 Units Allen Bradley
1771-IAD AB PLC-5 Digital Input Mod. 120Volts AC/DC, 16 Inputs 1771I 1771IA
1771-IBD AB PLC-5 Input Mod. 10-30V DC Sink/Source Load 16 Input 1771I 1771IB
1771-IBDK Rockwell AB PLC-5 Input Mod. Conforormal Coat, 10-30VDC 16 Input 1771I 1771IB
1771-IBN Allen Bradley PLC-5 High-True Input Mod. 10-30V DC 32 Input 1771I 1771IB
1771-IBNK AB PLC-5 High-True 32-Input Mod. Confm. Coat 10-30VDC 1771I 1771IB 1771IBN
1771-IDC AB 1771-IDC Isolated Input Module for PLC-5 1771-ID 1771-I Allen Bradley
1771-IE Analog Input Module AB PLC5 1771IE 1771-I Rockwell Automation Allen Bradley
1771-IE04 PLC5 Controller Analog Input 8 Bit Module 1771 IE04 For Allen Bradley
1771-IEC AB Input Analog Module PLC5 Series Allen Bradley 8 Bit Rockwell Automation
1771-IF 1771-IF Input Analog Module 1771IF AB PLC5 Allen Bradley Automation
1771-IFC Analog Input Module 12 Bit – AB PLC-5 1771-I PLC-5 Automation Rockwell
1771-IFE AB PLC-5 Analog Input Module, 12 Bit, 1771I 1771IF 1771IFE Rockwell Automation
1771-IFEK AB PLC-5 Analog Input Module, 1771I 1771IF 1771IFE 1771IFEK Allen Bradley Controller
1771-IND PLC-5 Systems AB INPUT Mod. 24V AC, 16 INPUT 1771I 1771IN Allen Bradley Systems
1771-IRK AB PLC-5 Conformally Coated RTD Input Mod. 3-Wire RTD 1771I 1771IR Automation Rockwell
1771-IVN AB PLC-5 Low-True Input Mod. 10-30V DC, 32 Input 1771I 1771IV Allen Bradley PLC-5
1771-IXE AB PLC-5 Thermocouple/Millivolt Input Mod. 1771I 1771IX Automation Systems
1771-IYC AB Thermocouple Expander Module PLC-5 1771IYC Allen Bradley
1771-KE Allen Bradley AB Data Hwy RS-232C Intfce. Mod. 1771K Rockwell Systems for PLC-5
1771-KF AB Data Hwy RS-232C Intfce. Mod. (Stand Alone) 1771K Allen Bradley PLC-5
1771-NC6 Allen Bradley Automation High Resolution Isolated Analog Series Cable PLC-5
1771-NIS Allen Bradley AB High Resolution Isolated Analog Module 1771N 1771NI PLC-5
1771-NIVT PLC-5 Systems AB PLC-5 High Res. Iso. Anlg. Mod. 1771N 1771NI 1771NIV
1771-NT1 Rockwell Automation AB PLC-5 High Res. Iso. Anlg. Mod. 8 Inputs, 1771N 1771NT
1771-OAD Allen Bradley AB PLC-5 Digital Output Mod. 120V AC, 16 Outputs 1771O 1771OA
1771-OADK AB PLC-5 Digital Output Mod. 16 Outputs, Conformal Coat 1771O 1771OA 1771OAD
1771-OBN AB PLC-5 10-30V DC High-True Output Mod. 32 Outputs, 1771O 1771OB PLC Systems
1771-ODC Allen Bradley AB Output Module Isolated PLC-5 1771-ODC 1771-OD 1771-O 1771 ODC
1771-OFE2 Allen Bradley AB PLC-5 Analog Output Module 4 Outputs 1771O 1771OF 1771OFE
1771-OFE2K Rockwell AB PLC-5 Analog Output Mod. 4 Outputs 1771O 1771OF 1771OFE 1771OFE2
1771-OFE3 Automation AB PLC-5 Analog Output Mod. 4 Diff. 1771O 1771OF 1771OFE Rockwell AB
1771-OGC Allen Bradley AB PLC-5 Output Module 1771-OGC 1771-OG 1771-O 1771 OGC PLC-5
1771-ON Allen Bradley PLC-5 AB 24V AC OUTPUT MODULE, 8 OUTPUTS 1771O Automation
1771-OW Allen Bradley PLC-5 AB CONTACT OUTPUT Mod. 1771O Catalog Number 1771-OW
1771-OW16 Allen Bradley AB PLC-5 Chan. Iso. Contact Output Mod. 16 Outputs 1771O 1771OW 1771OW1
1771-OW16K AB PLC-5 16 Output Mod. Conformally Coated 1771O 1771OW 1771OW1 1771OW16
1771-OY Allen Bradley AB PLC-5 Output Module Reelay 1771-OY 1771-O 1771OY Rockwell Automation
1771-OYC Rockwell Automation for PLC-5 Module Output Allen Bradley Systems 1771-OYC
1771-P4 AB Power Supply Module for PLC5 1771P4 Rockwell Automation Systems for PLC-5
1771-P4S Rockwell Automation AB PLC-5 Power Supply, 1-Slot, 8A, 120V AC 1771P 1771P4
1771-P4S1 Automation AB PLC-5 Power Supply, 1-Slot, 8A, 100V AC 1771P 1771P4 1771P4S Rockwell
1771-P4SK Automation AB PLC-5 Conform. Coat., Power Sply., 8A, 120V AC,1771P 1771P4 1771P4S
1771-P5 Allen Bradley PLC-5 AB Power Sply., 8A, 24V DC 1771P for Rockwell Automation
1771-P6R Allen Bradley PLC-5 AB Power Supply ,Renund., Slot, 8A, 220V AC 1771P 1771P6
1771-PSCC Allen Bradley PLC-5 AB POWER CABLE, 1771 I/O RACK TO 1771-PS7, 1771-PSC Rockwell
1771-QD Allen Bradley PLC-5 Plastic Injection Control Module Rockwell Automation
1771-RTP1 Automation PLC-5 AB High Res. Isolated Analog Ser. 1771R 1771RT 1771RTP 1771RTP1
1771-RTP4 PLC-5 AB High Res. Isolated Analog Ser. 1771R 1771RT 1771RTP 1771RTP4 Rockwell
1771-SDN Automation AB PLC-5 DeviceNet Scanner Module, 2-Channel 1771S 1771SD PLC-5
1771-SN PLC-5 AB SUB I/O SCANNER MODULE 1771S Allen Bradley Rockwell Automation Systems
1771-SPI PLC-5 AB SPI PROTOCOL INTERFACE MODULE 1771S 1771SP Automation Allen Bradley
1771-TCM PLC-5 Automation AB TEMPERATURE CONTROL MODULE 1771T 1771TC Rockwell Systems
1771-WB Rockwell Automation PLC-5 Field Wiring Arm, 12 Terminals, Gold Plated
1771-WC PLC-5 Systems Field Wiring Arm, 10 Terminals, Gold Plated Programmable
1771-WD Wiring PLC-5 Field Wiring Arm, 12 Terminals, Tin Plated Allen Bradley Systems
1771-WE Allen Bradley PLC-5 Thermocouple Wiring Arm For IX/IY Rockwell Automation
1785-L40C Rockwell Automation AB PLC-5/40C Cntrlr. for ControlNet 1785L 1785L4 1785L40
1785-L40C15 AUtomation AB PLC-5/40C Procsr. w/ControlNet 48K SRAM 1785L 1785L4 1785L40 1785L40C1
1785-L40E Allen Bradley AB PLC-5/40E EtherNet/IP Cntrlr. 48K Word SRAM 1785L 1785L4 1785L40
1785-L40L Rockwell AB PLC-5/40L Procsr., Extd. Local I/O, 48K Word SRAM 1785L 1785L4 1785L40
1785-L46B Rockwell AB PLC-5/40 Protected Cntrlr. 48K Word SRAM 1785L 1785L4 1785L46
1785-L46C15 Protected ControlNet PLC-5/40 Controller, 48K Word Rockwell Automation
1785-L60B Allen Bradley AB PLC-5/60 Cntrlr. 64K Word SRAM 1785L 1785L6 1785L60 Rockwell
1785-L60L Rockwell Automation AB Extnd. Local PLC-5/60L Cntrlr. 64K Word SRAM 1785L 1785L6
1785-L80B Rockwell AB PLC-5/80 Cntrlr. 100K Word SRAM 1785L 1785L8 1785L80 PLC-5 Systems
1785-L80C Automation AB PLC-5/80C Cntrlr. for ControlNet Phase 1.25 1785L 1785L8 1785L80
1785-L80C15 Allen AB PLC-5/80C Cntrlr. for ControlNet 1.5 1785L 1785L8 1785L80 1785L80C 1785L80C1
1785-L80E Allen Bradley AB EtherNet/IP PLC-5/80E Cntrlr. 100K Word SRAM 1785L 1785L8 1785L80
1785-L86B Protected PLC-5/80 Controller, 100K Word SRAM Rockwell Automation Systems
1785-LT Allen Bradley AB PLC-5 Processor Module 1785-LT 1785-L 1785LT PLC-5 Systems
1785-LT2 Allen Bradley PLC-5 Systems 1785 CPU Module PLC-5 Memory Rockwell Automation
1785-LT3 Allen Bradley Systems Processor PLC5 Module AB 1785-LT Rockwell Automation
1785-LT4 PLC-5 Programmable Controller Module Processor Memory Rockwell Automation
1785-M100 Allen Bradley AB PLC-5 EEPROM Mem. Cart., 100K Words 1785M 1785M1 1785M10
1785-ME16 Rockwell Automation AB PLC-5/11, 5/20 EEPROM Mem. Cart. 1785M 1785ME 1785ME1
1785-ME32 Rockwell Automation AB PLC-5/30 EEPROM Mem. Cart. 1785M 1785ME 1785ME3
1785-ME64 Automation AB PLC-5/60 EEPROM Mem. Cart., 64K Words, Ser. A 1785M 1785ME 1785ME6
1785-MJ Allen Bradley Automation AB PLC-5 EEPROM Cart. 1785M Rockwell Systems Robotics
1785-O5G PLC5 Interface Module 1785o5g 1785-05G Allen Bradley PLC-5 1785-05 CN
1785-RC Rockwell Automation AB PLC-5 Relay Cartridge with EditT/Force Monitoring 1785R
1785-V30B Allen Bradley PLC-5/V30 Controller 32K Max User Memory Words 1785-V30 1785-V3 1785-V
1785-V40L Allen Bradley PLC-5/V40L Processor 48K 1785-V40 1785-V4 1785-V Rockwell Automation
1785-V80B Allen Bradley PLC-5/V80 Processor Module 100K Max User Memory Words 1785-V80 1785-V8
PLC-5-11 PLC-5/11 AB 1785-L11B Cntrlr. 8K Word SRAM PLC511 Programmable Controller Rockwell
PLC-5-12 Processor PLC-5/12 Module AB PLC512 Programmable Controller Automation Allen Bradley
PLC-5-15 PLC-5/15 AB 1785-LT Processor Module Allen Bradley 1785LT 1785 LT Automation
PLC-5-20 PLC-5/20 AB 1785-L20B Cntrlr. 16K Word SRAM Allen Bradley Programmable Automation
PLC-5-20C PLC-5/20C AB 1785-L20C ControlNet 1.25 Cntrlr. 16K Allen Bradley PLC 520C Rockwell
PLC-5-20E PLC-5/20 Controller, 16K Word SRAM Allen Bradley Programmable Processor Automation
PLC-5-25 PLC-5/25 CPU Module PLC-5 Memory Programmable Controller Allen Bradley Rockwell
PLC-5-26 PLC-5/26 AB 1785-L26B Procsr. 16K Word SRAM PLC526 Allen Bradley Programmable
PLC-5-30 PLC-5/30 AB 1785-L30B Stnd. Cntrlr. 32K Word SRAM Processor PLC 530 1785L30B
PLC-5-40 PLC-5/40 AB 1785-L40B 4xDH+/RIO Cntrlr. 48K Word SRAM 1785L40B Programmable
PLC-5-40C PLC-5/40C AB 1785-L40C Cntrlr. for ControlNet Programmable Allen Bradley PLC 540C
PLC-5-40E PLC-5/40E AB 1785-L40E EtherNet/IP Cntrlr. 48K Word SRAM Allen Bradley 1785-L40 CPU
PLC-5-40L PLC-5/40L AB 1785-L40L Procsr., Extd. Local I/O, 48K Word SRAM Allen Bradley
PLC-5-46 PLC-5/46 AB 1785-L46B Protected Cntrlr. 48K Word SRAM Programmable PLC 546 Controller
PLC-5-46C Protected ControlNet PLC-5/40 Controller, 48K Word PLC-5/46C Allen Bradley CPU
PLC-5-60 PLC-5/60 AB 1785-L60B Cntrlr. 64K Word SRAM Allen Bradley Programmable Processor L60B
PLC-5-60L PLC-5/60L AB Extnd. Local 1785-L60L Cntrlr. 64K Word SRAM Processor CPU Allen Bradley PLC
PLC-5-80 PLC-5/80 AB 1785-L80B Cntrlr. 100K Word SRAM Allen Bradley Processor PLC 580 1785 L80B
PLC-5-80C PLC-5/80C AB 1785-L80C Cntrlr. for ControlNet Phase 1.25 Programmable PLC 580C
PLC-5-80E PLC-5/80E AB EtherNet/IP 1785-L80E Cntrlr. 100K Word SRAM Logic Controller Allen Bradley
PLC-5-86 Protected PLC-5/80 Controller, 100K Word SRAM Processor CPU 1785-L86B PLC 580