GE Fanuc IC697MDL940 Relay Output Module

The GE Fanuc IC697MDL940 provides flexible switching capabilities for the Series 90-70 PLC platform. This module features 16 independent relay outputs to control various field devices. Specifically, the hardware includes 8 Form C (normally open/normally closed) contacts and 8 Form A (normally open) contacts. This dual-configuration allows engineers to manage a mix of different circuit types from a single slot. The unit interfaces directly with the VME backplane to receive logic commands from the system CPU.

Versatile Voltage and Load Handling

Versatility is a primary advantage of the IC697MDL940. It supports both AC and DC switching across a wide range of voltages. For AC applications, the module handles up to 265 VAC. In DC environments, it operates effectively between 5 and 150 VDC. The silver alloy contacts offer low resistance and high durability. While the standard AC load current reaches up to 2.0 Amps, the DC capacity varies based on voltage levels. These specifications make the module suitable for driving motor starters, solenoids, and indicators.

Built-in Hardware Protection and Diagnostics

Reliability remains a core focus for this relay module. Every output channel includes an internal 3-amp fuse to protect the circuitry against overcurrent events. Additionally, integrated snubber circuits (composed of a 47-ohm resistor and 0.015 µF capacitor) suppress voltage spikes during inductive load switching. The front panel features 16 green LEDs that provide real-time status of each relay point. Furthermore, a 1500V isolation rating ensures that high-voltage field transients do not damage the sensitive PLC backplane components.

Technical Performance Specifications

• Output Channels: 16 (8 Form C and 8 Form A)
• AC Voltage Range: 120/240 VAC (Standard) to 265 VAC (Maximum)
• DC Voltage Range: 5/24/125 VDC (Typical) to 150 VDC (Form A only)
• Max Load Current: 2.0 Amps (AC/DC @ 30V); 0.2 Amps (DC @ 125V)
• Switching Frequency: 20 cycles per minute for inductive loads
• Mechanical Life: 20 million cycles
• Electrical Life: 1 million cycles at rated resistive load
• Isolation: 1500V RMS between field and logic sides
• Response Time: 10 milliseconds (Maximum)

Installation and Maintenance

The IC697MDL940 occupies a single slot in any Series 90-70 rack. To ensure long-term performance, the module uses a silver-alloy contact design which prevents oxidation during low-current switching. Technicians can easily replace the front-mounted fuses if a field fault occurs. Because the module utilizes standard VME mechanics, it stays secure even in high-vibration industrial environments. This hardware is an essential component for any automated system requiring rugged, high-current mechanical switching.