GE IC694MDL660 PACSystem RX3i 24 VDC Discrete Input Module

Product Introduction

When industrial environments demand reliable discrete input sensing, the GE IC694MDL660 provides a robust solution. This PACSystem RX3i module, originally from GE Intelligent Platforms (now Emerson Automation), delivers 32 discrete input channels organized into four groups of eight. Each channel accepts a 0-30 VDC input range with a nominal 24 VDC, making it suitable for a wide variety of sensor and switch applications. The module supports both positive and negative logic wiring, offering flexibility in system design. As an active product, the IC694MDL660 remains a key component for modern automation systems.

Technical Specifications Breakdown

The IC694MDL660 operates with an input voltage range of 0-30 VDC and a nominal input of 24 VDC. Each channel draws 7.0 mA at rated voltage, with an on-state voltage range of 11.5-30 VDC and an off-state voltage of 0-5 VDC. The on-state current is 3.2 mA maximum, while the off-state current is 1.1 mA maximum. Power consumption is 300 mA, drawing 195 mA from the 5 VDC backplane and 224 mA from the 24 VDC field supply. Isolation is provided at 250 VAC continuous and 1500 VAC for one minute between field and backplane, as well as between groups. Selectable input filter times include 0.5 ms, 1.0 ms, 2.0 ms, 5 ms, 10 ms, 50 ms, and 100 ms, which directly set the on and off response times. These filters help eliminate false triggering from environmental noise or mechanical bounce.

Industry Applications

In manufacturing lines, the IC694MDL660 monitors limit switches and proximity sensors to track part presence and machine position. Its 32 high-density inputs reduce the number of modules needed, saving rack space and wiring costs. In material handling systems, the module reads photo-eye sensors for conveyor control, with selectable filters ignoring brief obstructions like dust. The positive/negative logic wiring accommodates both sourcing and sinking sensor types, simplifying integration into existing systems.

Installation & Setup Guidance

Mount the IC694MDL660 on any RX3i rack and connect it to an RX3i CPU with firmware version 2.90 or greater. Use a high-density terminal block: either the box-style IC694TBB032 or the spring-style IC694TBS032. Wire each group of eight inputs with a common return, observing the polarity for positive or negative logic. Set the input filter time via the CPU configuration software to match the application's noise and debounce requirements. Each input has a dedicated LED indicator; an illuminated LED shows logic 1 (active input).

Maintenance & Reliability

Routine inspection of the terminal block connections and LED indicators helps ensure reliable operation. The module's optical isolation protects the backplane from field transients, reducing downtime. Since the IC694MDL660 is an active product, replacement parts are readily available from BluePLC Industrial. For cost-effective maintenance, verify that the input filter settings align with the actual sensor switching speeds to avoid missed signals.

Compatibility & Integration

The IC694MDL660 is fully compatible with the PACSystem RX3i family, requiring an RX3i CPU version 2.90 or later. It is not compatible with Series 90-30 CPUs. The module reports diagnostic information to the CPU via the terminal block, aiding in troubleshooting. Use the IC694TBB032 or IC694TBS032 terminal blocks for wiring. The module provides 48 input bits and 16 output bits of resolution.

Selection Guide & Purchasing Advice

Before ordering, confirm that your system uses an RX3i CPU with firmware 2.90 or higher. Verify the required terminal block type (box-style IC694TBB032 or spring-style IC694TBS032) and ensure adequate rack space. BluePLC Industrial stocks the GE IC694MDL660 and can advise on current lifecycle status and availability. For applications needing high-density 24 VDC discrete inputs with flexible logic and adjustable filtering, this module offers proven performance.