Buyer’s Guide: Evaluating the GE IC694MDL930 Relay Output Module
When specifying a relay output module for your PACSystems RX3i or Series 90-30 control system, the GE IC694MDL930 stands out as a versatile, active-lifecycle solution. This 8-channel module provides individually isolated Form A (Normally Open) relay outputs, allowing you to switch a wide range of AC and DC loads directly from your PLC. Whether you’re building a new panel or upgrading an existing installation, understanding the IC694MDL930’s capabilities helps you avoid costly mismatches.
What Is the GE IC694MDL930?
The IC694MDL930 is a relay output module from GE Fanuc (now under Emerson Automation) designed for the PACSystem RX3i platform. It features eight individually isolated normally open relay contacts, each with its own common terminal. This isolation lets you mix voltage types and levels across channels—a key advantage when controlling diverse field devices. The module is classified as a high-voltage output module and includes eight status LEDs for easy troubleshooting. Its active lifecycle status means you can still source it for new builds and spares.
Key Technical Specifications That Matter
Understanding the IC694MDL930’s electrical ratings ensures reliable switching and long service life. The output voltage range spans 5–250 VAC (50/60 Hz) and 5–30 VDC, with nominal voltages of 120–240 VAC and 24 VDC. Each output handles up to 4 A resistive or 2 A pilot duty. The module supports a maximum inrush of 5 A and a minimum load of 10 mA per point. Response time is 15 ms typical, and backplane current draw is 6 mA at 5 VDC plus 70 mA at 24 VDC when all outputs are energized. Point-to-point isolation is rated 250 VAC continuous, and field-to-backplane isolation is 250 VAC continuous (1500 VAC for 1 minute). Relay contact life ranges from 50,000 to 1,000,000 operations, depending on load. These specs make the module suitable for direct control of solenoids, motor starters, and indicator lamps.
Where the IC694MDL930 Excels
This module shines in applications requiring flexible load switching. In a packaging line, it can drive multiple solenoid valves and pilot lights from a single slot, reducing wiring complexity. For building automation, its AC/DC compatibility allows direct control of 24 VDC relays and 120 VAC dampers. In water treatment, the high inrush rating handles small motor starters without external relays. The individually isolated channels also prevent ground loops when interfacing with different voltage systems.
Installation and Compatibility
The IC694MDL930 installs in any RX3i PLC I/O slot or Series 90-30 baseplate. It works with PACSystems RX3i and Series 90-30 CPUs. You can use it locally in the CPU rack or remotely via communication adapters. The module requires an external power supply for field devices—either 24 VDC or 120–240 VAC, depending on your loads. Always follow local wiring codes and the manufacturer’s installation manual. Verify that your backplane can supply the required current and that your field wiring meets the voltage and current ratings.
Maintenance and Reliability
Relay outputs have mechanical contacts that wear over time. Contact life depends on voltage, current, and load type, ranging from 50,000 to 1,000,000 operations. For high-cycle applications, consider interposing relays to extend module life. Periodically inspect connections and ensure the module is free from dust and moisture. The eight LEDs simplify troubleshooting by showing output status. Since the module lacks internal fusing, external protection is recommended for critical loads.
Selection Checklist
Before purchasing, confirm your system voltage and load current per channel. Ensure you have the correct external power supply and that your backplane can handle the 6 mA at 5 VDC and 70 mA at 24 VDC draw. Check that your CPU is compatible (RX3i or Series 90-30). If you need more channels, consider the 16-channel version. For reliable sourcing, SpareTechPLC offers this module with full traceability. Always verify current lifecycle status and availability with SpareTechPLC before ordering.
Frequently Asked Questions
Q: Can I use the IC694MDL930 with both AC and DC loads on different channels?
A: Yes, each channel is individually isolated, so you can mix AC and DC voltages within the specified ranges.
Q: What is the maximum current per output?
A: 4 A resistive or 2 A pilot duty per point, with a maximum of 20 A per module for UL installations.
Q: Does this module require an external power supply?
A: Yes, field devices need an external supply of 24 VDC or 120–240 VAC.
Q: What is the response time?
A: Typical response time is 15 ms for both on and off switching.
Q: Is the IC694MDL930 still available?
A: It is listed as active, but availability may vary. Contact SpareTechPLC to confirm stock and lead time.
