S900 I/O for ABB Freelance DCS

S900 provides all input and output modules needed for intrinsically safe field signal connection. The field signals are amplified in every S900 functional module, electrically isolated, and then output via an internal serial bus. A communication interface converts the digitized signals to adapt them to the standardized PROFIBUS DPV1 fieldbus protocol. Supervisory process control systems, DCS or SCADA systems use an intrinsically safe fieldbus to communicate with the communication interface.

A single fieldbus network suffices for configuring the individual fieldbus nodes, for cyclic data exchange, for all acyclic services, and for communication with HART®-compatible field instruments. All functional modules can be replaced easily and quickly in the installation or maintenance phase. The functional modules and the – optionally redundant – communication interfaces of systems placed in Zone 1 can be removed and plugged in while operation is running, without affecting the communication of the remaining modules. Only the primary power for the plug-in type power supply modules requires increased safety EEx-e.

Integrated encapsulated switch-off mechanisms allow for hotswapping, i.e. the power supply units can be replaced without interrupting the primary power. Due to its little space requirements and robust design and its environmentally ruggedized case, the I/O system S900 is the best, cost-saving solution for use on site, in hazardous Zone 1 or Zone 2 areas.

It is our goal to provide the services and programs required to protect our customer’s control system investment throughout its lifecycle. From initial design, engineering and startup services, through maintenance and optimization to upgrade and evolution, we provide the programs, services and commitment necessary to ensure maximum return on investment for your system.

These valuable lifecycle programs include:

  • System Updates
  • Lifecycle Policy
  • Automation Sentinel
  • Evolution
  • Services:
    Reliablility, Full Service, Performance Services, Product Service, Remote Services
  • Solutions Bank
  • Consult IT

We focus on industrial automation and process instrument over 20 years

S900 I/O for ABB Freelance DCS

S900 I/O communicates with the control system level using the Profibus standard.
The I/O system can be installed directly in the field, therefore the costs for marshalling and wiring are reduced.

The system is sturdy, error-tolerant and easy to service. Integrated disconnection mechanisms allow replacement during operation, meaning that there is no need to interrupt the primary voltage in order to exchange the power supply units.

S900 I/O features include:

  • Remote I/O system for hazardous areas
  • Redundancy for maximum availability
  • Hot-swap capability of all components during operation
  • Extended diagnostic functions to reduce maintenance efforts

Analog Input (4 channels)

DescriptionNon ExEx Zone 2Ex Zone 1
Transmitter power supply,
Analog Input
4…20 mA
Transmitter power supply,
Analog Input, HART
4…20 mA
Passive Analog Input, HART
0/4…20 mA

Analog Output (4 channels)

DescriptionNon ExEx Zone 2Ex Zone 1
Analog output
0/4…20 mA
Analog output, isolated
0/4…20 mA
isolated outputs channel by channel
Analog output HART
0/4…20 mA

Digital Input/Output

DescriptionNon ExEx Zone 2Ex Zone 1
Digital Output for I.S. valves
(4 channels)
Digital Input or Output
input for dry contact or NAMUR initiator
output for low power I.S. valves
(8 channels)
Relay module for digital signals
(6 channels)

Temperature (4 channels)

DescriptionNon ExEx Zone 2Ex Zone 1
Pt100, Pt1000, Ni100 in 2-/3-/4-technology thermocouples type B, E, J, K, L, N, R, S, T
isolated inputs channel by channel

Frequency Input (2 channels)

DescriptionNon ExEx Zone 2Ex Zone 1
input for dry contact or NAMUR initiatorS900-DP910NS900-DP910BS900-DP910S

Communication Modules

DescriptionNon ExEx Zone 2Ex Zone 1
Communication Interface
Intrinsically safe PROFIBUS-DP connectorstandard connectorS900-BP910SS900-BP910S