The GE Fanuc IC694MDL741, also cataloged as the IC694MDL741 Discrete Output Module, operates as a dedicated hardware component for 12/24 VDC negative logic signal switching within PACSystem RX3i platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC694MDL741 |
| Brand | GE Fanuc / Emerson |
| Origin | USA |
| Weight | 0.14 kg (0.31 lbs) |
| Dimensions | Standard RX3i single-slot module |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 110 mA from 5 VDC backplane bus (all outputs ON) |
| Number of Channels | 16 (2 groups of 8 channels) |
| Output Voltage Range | 12 to 24 VDC (+20%, -15%) |
| Output Current | 0.5 A per point; 2.0 A per common |
| On-State Voltage Drop | 0.5 V maximum |
| Off-State Leakage Current | 1.0 mA maximum |
| Response Times | On: 2 ms maximum / Off: 2 ms maximum |
| Isolation | 250 VAC continuous (1500 VAC for 1 minute) Field-to-Backplane and Group-to-Group |
Backplane Bus Communication Velocity & I/O Density Scaling
The IC694MDL741 exchanges discrete channel states directly via the high-speed RX3i backplane bus, enabling deterministic update rates across all 16 output points. Optimized for high-density I/O configurations, the module distributes current consumption over two distinct 8-channel groups while keeping backplane power draw capped at 110 mA at 5 VDC. Internal firmware flash compatibility ensures synchronized CPU logic execution with real-time LED status reflection across active sinking load paths.
Frequently Asked Questions
Q: What is the backplane current draw for the IC694MDL741 when all 16 channels are active?
A: The module draws 110 mA from the internal 5 VDC backplane bus when all 16 output channels are in the ON state.
Q: What are the current capacity limits per point and per common group on this module?
A: Each individual channel supports up to 0.5 A output current, with a total maximum rating of 2.0 A per 8-channel common group.
Q: What isolation level exists between the two output channel groups?
A: The module provides group-to-group optical isolation rated at 250 VAC continuous and 1500 VAC for 1 minute.
Field Installation Guidelines
- Power down the PACSystem RX3i rack prior to inserting or removing the IC694MDL741 module to avoid damage to backplane connector pins.
- Slide the module into the selected rack slot and press firmly until the top and bottom mounting latches snap into place on the baseplate.
- Wire the field loads observing negative logic (sinking output) conventions, ensuring external 12/24 VDC power connections do not exceed the +20% upper voltage boundary.
- Separate DC signal wiring from high-voltage AC cables inside the panel ducting to minimize electromagnetic noise coupling onto field circuits.
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