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Configured for receiving discrete binary field signals in PACSystems RX3i platforms, the GE Fanuc IC694MDL655 (IC694MDL655 Discrete Input Module) provides direct physical/electrical execution. This high-density module features 32 distinct input channels divided into four isolated groups of eight, allowing interface capabilities with proximity sensors, limit switches, and pushbuttons.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC694MDL655 |
| Brand | GE Fanuc Emerson |
| Origin | United States |
| Weight | 0.26 kg (0.56 lbs) |
| Dimensions | 130 mm x 30 mm x 115 mm (Standard single-slot width) |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 195 mA maximum @ 5 VDC (backplane), 224 mA typical @ 24 VDC |
| Number of Channels | 32 (4 groups of 8 channels) |
| Input Voltage Range | 0 to 30 VDC |
| Nominal Input Voltage | 24 VDC |
| Input Current | 7.0 mA @ 24 VDC |
| On-state Voltage | 11.5 to 30.0 VDC |
| Off-state Voltage | 0 to 5.0 VDC |
| On-state Current | 3.2 mA minimum |
| Off-state Current | 1.1 mA maximum |
| Response Time (On/Off) | 2 ms maximum |
| Maximum Cable Length | 30 m |
| Isolation Rating | 250 VAC continuous; 1500 VAC for 1 minute (Backplane to Frame Ground) |
| Group-to-Group Isolation | 50 VAC continuous; 500 VAC for 1 minute |
| Connector Type | Two male 24-pin connectors |
I/O Density Scaling & Logic Configuration
The IC694MDL655 provides high-density I/O density scaling by packing 32 discrete channels into a single-slot module width. The circuitry supports both positive and negative logic (sink or source configurations). Wiring configuration is established per group; positive logic requires the positive field conductor connected directly to the input channel with the negative terminal routed to the common, while negative logic reverses this orientation. Isolation boundaries are placed between the four separate input groups to permit independent wiring configurations under varying voltage potentials.
Frequently Asked Questions
Q: Can different input groups on the IC694MDL655 operate with different logic types simultaneously?
A: Yes. Because electrical isolation is maintained between the four groups of eight channels, you can wire one group for positive logic (sinking) and another group for negative logic (sourcing) on the same physical module.
Q: What is the maximum recommended field wiring distance for this module?
A: The maximum cable length for field devices wired to the IC694MDL655 must not exceed 30 meters to limit signal degradation and shield the inputs from electromagnetic noise.
Q: What indication is provided for individual input channel states?
A: The module faceplate features 32 green LED indicators corresponding to each channel. An active LED signifies that the respective input channel is receiving an on-state voltage of 11.5 to 30.0 VDC.
Field Installation Guidelines
- Chassis Positioning: Turn off the PACSystems RX3i baseplate power prior to insertion. Insert the module into any available I/O slot on the local rack or a distributed baseplate.
- Connector Termination: Secure the field wiring to the two front-facing 24-pin male connectors. Ensure the terminal screws are torqued to prevent loose physical connections.
- Shielding and Routing: Run input sensor wiring in dedicated conduits separate from high-voltage AC motor power lines to mitigate cross-talk and transient voltage spikes.
- External Power Supply: When powering the field side from an external 24 VDC supply, ensure the supply output does not exceed 30 VDC continuous.
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