Configured for high-density digital signal switching in Series 90-70 PLC systems, the GE Fanuc IC697MDL940 (IC697MDL940 Relay Output Module) provides direct physical execution of control logic across sixteen isolated contact sets.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The IC697MDL940 module integrates into the Series 90-70 backplane architecture, facilitating deterministic control signal distribution. The module maintains high-speed communication with the host processor, ensuring that relay state updates occur within the programmed scan cycle limits. This deterministic behavior is critical for maintaining consistency in time-sensitive control applications, while the modular design allows for I/O density scaling as process complexity increases.

Frequently Asked Questions (FAQ)

Q: Can the internal 3 A fuse be replaced in the field?

A: Yes, the integrated 3 A fuse is accessible for replacement. Ensure the module is disconnected from all external load power before attempting to remove the fuse to prevent accidental arcing or damage to the contact structures.

Q: How should inductive loads be suppressed when connected to these relay outputs?

A: Inductive loads, such as solenoids or contactor coils, must be suppressed using external freewheeling diodes (for DC) or metal oxide varistors (for AC). Failure to provide suppression will cause excessive arcing across the relay contacts, leading to premature mechanical failure and welding of the output contacts.

Field Installation Guidelines

1. Power down the PLC backplane and all external load power sources before inserting or removing the module.
2. Secure the module using the built-in locking levers to ensure a positive connection with the backplane pins and prevent intermittent signal loss.
3. Observe the isolation requirements for the 8 Form C outputs; ensure that the common-mode voltage between circuits does not exceed the rated insulation voltage of the module.
4. Verify all field wiring connections for tightness; loose terminals can lead to overheating and high-resistance faults in the relay loop.
5. Ground the external cable shields at a central common point to minimize electromagnetic noise coupling into the output circuits, which could interfere with sensitive monitoring equipment.