The GE Fanuc IC694MDL240, also cataloged as the IC694MDL240 Discrete Input Module, operates as a dedicated hardware component for high-voltage AC binary signal sensing within PACSystem RX3i platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC694MDL240 |
| Brand | GE Fanuc / Emerson |
| Origin | USA |
| Weight | 0.26 kg (0.56 lbs) |
| Dimensions | Single-slot RX3i module |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 90 mA at 5 VDC from backplane bus |
| Number of Channels | Sixteen (16) discrete input points |
| Nominal Voltage | 120 VAC (85 to 132 VAC input range) |
| Input Frequency Range | 47 to 63 Hz |
| Input Channel Grouping | Single group of 16 inputs with 1 common terminal |
| On-State Voltage / Current | 74 to 132 VAC; 6 mA (12 mA max per channel) |
| Off-State Voltage / Current | 0 to 20 VAC; 2.2 mA max |
| Signal Response Time | On: 30 ms max; Off: 45 ms max |
| Isolation Rating | 250 VAC continuous; 1500 VAC for 1 minute (optical) |
| Status Display | 16 green LED channel indicators |
Backplane Bus Communication Velocity & I/O Density Scaling
The IC694MDL240 interfaces directly with the PACSystem RX3i universal backplane bus, transferring 16 discrete signal states into CPU memory tables during each rack scan cycle. Supporting high I/O density scaling across populated chassis slots, the module draws 90 mA from the internal +5 VDC logic bus while optical isolation barriers rated at 250 VAC continuous protect system electronics against external noise spikes. Firmware flash compatibility across the RX3i platform ensures proper module identification and diagnostic state reporting without controller intervention.
Frequently Asked Questions
Q: What are the backplane power supply requirements for the IC694MDL240 input module?
A: The module draws a maximum current of 90 mA from the +5 VDC backplane bus when all 16 input channels are energized.
Q: What are the On-state and Off-state voltage thresholds for signal detection?
A: An input point detects an On state between 74 VAC and 132 VAC, while an Off state is guaranteed between 0 VAC and 20 VAC.
Q: How are field wiring common connections structured across the 16 input points?
A: All 16 discrete input channels on the module are wired in a single isolated group sharing one common terminal.
Field Installation Guidelines
- Turn off all backplane power and field input source power prior to inserting or removing the module from the baseplate rack slot.
- Align the module housing with the backplane slot guides and push firmly until the upper and lower latch levers lock into the chassis frame.
- Route 120 VAC field input wiring separately from low-voltage DC communication lines to prevent induced electrical noise.
- Verify that the field supply common line is connected securely to the module's single common terminal before applying power.
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