IC694MDL231 IC694MDL231 3 IC694MDL231 4 IC694MDL231 2

The GE IC694MDL231 is a robust isolated AC voltage input module designed to interface field-level signals into GE Fanuc PACSystems RX3i and compatible Series 90-30 PLC environments. Engineered for industrial automation, this card features 8 individually isolated input channels with high-voltage capability and visual status indication. Whether monitoring limit switches, pushbuttons, relays, or AC signal sources, the IC694MDL231 delivers reliable and noise-immune signal acquisition suitable for demanding control applications.

Technical Specifications

Specification	Details
Module Type	240 VAC Isolated Input Module
Compatible PLC Series	GE Fanuc PACSystems RX3i & Series 90-30
Number of Inputs	8 isolated AC inputs
Rated Voltage	240 VAC nominal
Operational Voltage Range	200 – 264 VAC
On-State Voltage Threshold	> 148 VAC
Off-State Voltage Threshold	< 20 VAC
Input Current (typical)	~15 mA @ rated voltage
Isolation	250 VAC continuous (field-to-backplane and channel-to-channel)
Response Times	On: ≤ 30 ms; Off: ≤ 45 ms
Status Indicators	Green LED per channel
Frequency	50/60 Hz
Power Consumption	60 mA @ 5 VDC from backplane
Operating Temp.	0 °C to 60 °C
Mounting	Standard PLC I/O rack/backplane
Dimensions (L×W×H)	127 × 32 × 102 mm (approx.)
Weight	~0.34 kg (approx.)

The IC694MDL231’s eight individually isolated points allow each input to be powered from its own AC source if required, improving signal flexibility and reducing ground-loop interference.

Recommended Related Modules

GE IC694CPU331 – Core RX3i PLC CPU Module
GE IC694PWR330 – High-Capacity Power Supply Module
GE IC693MDL752 – Standard 16-Point Digital Input Module
GE IC693DSM314 – High-Density Discrete Output Module

Popular GE PLC I/O Modules

GE IC694ALG392 – 8-Channel Analog Output Module
GE IC694ALG442 – Mixed Analog I/O Module
GE IC694DNM200 – DeviceNet Master Communication Module
GE IC694CMM311 – Serial Communications Module

Applications

The IC694MDL231 is widely used in industrial control systems where reliable AC signal monitoring and isolation are essential:

Monitoring high-voltage AC switches and relay contacts
Capturing status from distributed AC sensors in machinery
Integrating field devices into centralized PLC logic
Supporting manufacturing automation and process control systems
Isolated input acquisition in harsh electrical environments

Its ability to isolate each channel individually makes it particularly suitable for signal integrity in noisy or high-EMI industrial settings.

Advantages

Eight fully isolated inputs provide excellent noise immunity and safety.
High-voltage handling (rated for 240 VAC) supports standard industrial AC signals.
Individual LED status per channel simplifies troubleshooting.
Low backplane consumption reduces overall system power demands.
Standard rack compatibility enables seamless integration into existing PLC systems.

This module is an essential choice for applications requiring safe and isolated acquisition of AC inputs with visual monitoring and robust industrial performance.

Technical FAQs

What type of signals does the IC694MDL231 accept?
It accepts AC voltage signals within 200–264 VAC.
How many input channels are available?
It provides 8 individually isolated AC inputs.
Does the module require a DC power source?
No — this module only operates with AC input signals and draws logic power from the PLC backplane.
What is the purpose of individual isolation per channel?
Isolation prevents cross-channel interference, improving signal integrity and fault protection.
What kind of LED indicators does it use?
Each input has a dedicated green LED showing ON/OFF status.
Can it be installed in any RX3i or Series 90-30 rack slot?
Yes — it fits in standard I/O slots.
What are on/off response times?
On: up to 30 ms; Off: up to 45 ms.
Does it support hot swapping?
Hot-swap support depends on backplane and system configuration; in general consult safety guidelines. (Typical for RX3i I/O modules)
What environments is it designed for?
Industrial automation cabinets with AC signal sources and standard operating temperatures.
Is this module still manufactured?
It is part of a legacy family — availability is typically through surplus, refurbished, or select inventory sources. (Common for RX3i products)