AC 800F Controller for ABB Freelance DCS

The AC 800F controller has a modular structure. The CPU is designed as a backplane to which various modules – power supply units, Ethernet and fieldbus modules – can be attached in line with the application. On the fieldbus side, modules are available for:

  • MODBUS (master / slave, RTU or ASCII)
  • IEC 60870-5-101, IEC 60870-5-104
  • CAN for Freelance Rack I/O

The fieldbus line and the connected field devices are entirely configured and parameterized using the Freelance Engineering Tool. No further external tools are needed for configuration.

The AC 800F controller distributes process and diagnostic data from four fieldbus gateways. If required, it can also work with various fieldbus types – and this is, of course, in addition to the usual tasks of a “conventional” controller. Thanks to its compact and sturdy design, the AC 800F is suitable both for installation in the control room and for use in junction boxes directly in the field.

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AC 800F controller

This field controller covers all major fieldbuses in process automation. Optionally, AC 800F supports redundancy. A single controller can typically support around 1,000 I/Os.

AC 800F Overview of Technical Data
 CPU32-bit super scalar RISC processor with rapid
bit processing
for application with battery backup
Task executionCyclic (configurable cycle times from 5 ms)
Event driven (predefined events)
As fast as possible (PLC mode)
Station bus (CAN bus)
Modbus protocol
IEC 60870-5-101 Telecontrol protocol
Ambient temperature0…60°C (32…140°F),
no forced cooling required
CertificatesCE, NAMUR, UL, ISA-S71.04 (G3 severity level)