What Is the IC694MDL940?
Struggling with reliable switching of high-current loads in your PACSystem RX3i? The GE IC694MDL940 relay output module delivers robust control with 16 individually isolated Normally Open (N.O.) Form A contacts. Formerly manufactured by GE Fanuc, now under Emerson Automation, this module integrates seamlessly into RX3i backplanes. Each output handles up to 2 Amps pilot duty, grouped into 4 groups of 4 outputs per common, supporting both DC and AC loads.
Technical Specifications Breakdown
- Output Configuration: 16 individually isolated N.O. outputs, grouped into 4 groups of 4 outputs each. Each group shares a common terminal.
- Operating Voltage: 5.0 to 30 Volts DC or 5.0 to 250 Volts AC, with rated voltages of 24 VDC and 120/240 VAC at 47–63 Hz.
- Switching Current: 2.0 Amps per output (pilot duty), with a maximum of 4 Amps per common group. Minimum load is 10 mA.
- Response Time: Maximum 15 milliseconds for both turn-on and turn-off, ensuring fast actuation.
- Power Consumption: Draws 7 mA from the 5 V backplane bus and 135 mA from the relay 24 V bus (all outputs on).
- Isolation: 250 VAC continuous, 1500 VAC for 1 minute between field and backplane, and to frame ground. Point-to-point isolation is provided.
- Indicators: 32 individually-numbered LEDs show the on/off status of each channel.
Industry Applications
The IC694MDL940 excels in controlling motor starters, solenoids, indicators, and other discrete loads. In a packaging line, its 2A per output reliably actuates pneumatic valves, while the 4A per common group handles multiple loads. For material handling, the 15 ms response time enables precise timing of conveyor diverters. The wide voltage range (5–250 VAC/VDC) simplifies integration with both 24 VDC sensors and 120 VAC actuators.
Installation & Setup Guidance
Install the IC694MDL940 in any I/O slot of a PACSystem RX3i backplane. Ensure the backplane provides 5 VDC and 24 VDC relay bus power. Connect field devices to the terminal block: each group shares a common terminal. Use external fuses per output group for overcurrent protection, as the module lacks internal fuses. Wire loads within the 2A per output and 4A per common limits. Verify polarity for DC loads; AC loads are polarity-insensitive.
Maintenance & Reliability
Relay contacts have a life of 100,000 to 1,000,000 operations, depending on voltage and load type. Inspect the module periodically for LED status and signs of overheating. Keep the backplane slots clean and ensure proper ventilation. For maximum reliability, avoid exceeding the inrush rating of 5.0 Amps. The optical isolation protects the backplane from field transients.
Compatibility & Integration
This module is compatible exclusively with PACSystem RX3i CPUs and backplanes. It occupies one slot and works with any RX3i power supply. No special software configuration is required—the system automatically recognizes the module. The 16 outputs map directly to discrete output addresses in the controller logic.
Buying Guide & Selection Advice
Before ordering the IC694MDL940, verify your backplane has an available slot and adequate power budget (7 mA @ 5 VDC, 135 mA @ 24 VDC). Confirm your load requirements: each output supports up to 2A pilot duty, with 4A per common group. For higher currents, use an external interposing relay. SpareTechPLC stocks this module with fast shipping and expert support to ensure your automation project stays on track.
Frequently Asked Questions
Q: What is the maximum response time of the IC694MDL940?
A: The maximum response time is 15 milliseconds for both turn-on and turn-off transitions.
Q: Can the IC694MDL940 switch both AC and DC loads?
A: Yes, it operates with 5–30 VDC or 5–250 VAC at 47–63 Hz, with rated voltages of 24 VDC and 120/240 VAC.
Q: How many outputs share a common terminal?
A: The module has 4 groups, each with 4 outputs sharing one common terminal. Maximum current per common is 4 Amps.
Q: Does the module include internal fuses?
A: No, there are no internal fuses. Emerson recommends installing external fuses per output group for protection.
Q: What is the minimum load current?
A: The minimum load is 10 mA per output to ensure reliable contact wetting.
