GE IC697MDL250F Series 90-70 Discrete Input Module

The GE IC697MDL250F, also cataloged as the IC697MDL250 Input Module, operates as a dedicated hardware component for converting discrete field device states into digital logic signals within Series 90-70 PLC platforms. Featuring 32 sinking input channels divided into two isolated groups of 16 points, the module operates across a nominal 24 VDC field voltage range (10 to 30 VDC). Field state updates are transferred across the 64-pin DIN 41612 backplane interface to host controllers, drawing 320 mA from the 5 VDC logic bus.

Hardware Specifications

Backplane Bus Communication Velocity & Network Integration

The IC697MDL250F maintains backplane bus communication velocity by performing onboard signal debounce and configurable input filtering (1 ms or 10 ms via hardware DIP switches) prior to driving logic state data across the backplane bus. The 64-pin DIN 41612 connector provides high-integrity backplane bus signaling, while onboard power decoupling via four 47 uF electrolytic capacitors buffers internal voltage rails against field-induced power noise. Dedicated channel optocouplers deliver 1,500 V RMS isolation between external field wiring and internal bus logic tracks, ensuring firmware flash compatibility and logic execution stability across all Series 90-70 racks.

Frequently Asked Questions

Q: What are the logic threshold levels and field power requirements for signal detection?

A: The input channels require a 24 VDC field supply (drawing 35 mA at idle and up to 259 mA with all 32 channels active at 7 mA per point). Logic high is detected at voltages above 15 VDC, while logic low is triggered below 5 VDC.

Q: How is input channel filtering adjusted on the module circuit board?

A: Signal delay times can be set to either 1 ms or 10 ms using onboard hardware DIP switches located directly on the module card assembly.

Field Installation Guidelines

1. Power off the target Series 90-70 rack chassis before inserting or extracting the input card.
2. Align card edges with the designated rack slot guides and slide the module back until the 64-pin DIN 41612 backplane connector fully seats into the chassis receptacle.
3. Fasten top and bottom panel retention screws to maintain chassis ground grounding and lock the module against mechanical vibration.
4. Wire 24 VDC external field power and sinking input points to the 48-pin front field connector block, maintaining separation from high-voltage AC cables inside wiring troughs.
5. Confirm correct field power supply polarity before energizing the 24 VDC loop circuit; internal continuous reverse polarity protection shields module hardware in the event of miswiring.