DCS Series Honeywell FTA Card MC-TAIH04 For Automation

Honeywell FTA Card MC-TAIH04

• Remote racks require a dual-ported Scanner2 module to interface with the Redundant Controllers. • Remote racks hold one Scanner2 module, one power supply, and up to 4, 8, or 12 I/O modules. • The 8 and 12 Slot racks are available with a redundant power supply option. A Power Status Module (PSM) provides power supply status when two power supplies are used. • The PSM monitors the power supply outputs and turns the green status LED off if a fault is detected. • The load is distributed between the two supplies during normal operation when two power supplies are used. • Racks with four I/O slots do not support the redundant power option.

The RS 485 twisted pair cable should be connected from the interface to each C75 CPUs of a redundant system to maintain communication following a failover event. • The same serial port (S1 or S2) must be used on both CPUs of a redundant system to maintain compatibility with the common configuration. • Failure of a lead CPU will cause the reserve CPU to assume the serial port function. • Failure of a serial port of the Lead controller will not cause a failure of the CPU. • The S1 and S2 serial ports may also be used to interface the controller to 3rd party operator interfaces using RS 485 and Modbus RTU slave protocol.

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