Description

The GE Fanuc IC693MDL655H is a Series 90-30 discrete input module for 24 VDC positive or negative logic applications.

The module provides 32 input points arranged in four isolated groups of eight. Each group has its own common connection for flexible field wiring.

The rated input voltage is 24 VDC, with an operating input range of 0 to 30 VDC. Typical ON-state current is 7.0 mA at 24 VDC.

The module uses optocoupler isolation between the field side and logic side. Isolation is also provided between the four input groups.

Thirty-two LED indicators provide individual ON/OFF status for all input points. The module occupies 32 bits of discrete %I input data in the Series 90-30 PLC.

The IC693MDL655H nameplate identifies the module as 24VDC 32PT POS/NEG FAST. It also carries UL listing E157515 and hazardous-location markings for Class I, Division 2 applications.

Features

• Series 90-30 discrete input module

• 32 digital input points

• 24 VDC rated input

• 0 to 30 VDC input range

• Positive or negative logic operation

• Four isolated groups of eight inputs

• Separate common connection for each group

• 7.0 mA typical ON current at 24 VDC

• 2 ms maximum ON response time

• 2 ms maximum OFF response time

• 1500 V field-to-logic isolation

• 250 V group-to-group isolation

• Individual LED indication for all 32 channels

• Two front-mounted 24-pin field connectors

• FAST input designation on the hardware nameplate

• UL listing E157515

• Class I, Division 2 hazardous-location marking

Applications

• Discrete sensor monitoring

• Limit switch inputs

• Proximity switch inputs

• Push-button and selector-switch inputs

• Machine status feedback

• 24 VDC industrial control circuits

• Series 90-30 PLC I/O expansion

• Replacement of installed IC693MDL655H modules

Technical Specifications

Input Characteristics

The IC693MDL655 specification defines the rated voltage, thresholds, response times, and input current for this module family.

Isolation

The module divides the 32 points into A1-A8, B1-B8, C1-C8, and D1-D8. Each group is isolated and uses its own user common.

Power Consumption

Connections

GE Fanuc specifies two front-mounted 24-pin connectors. The right connector serves groups A and B, while the left connector serves groups C and D.

Certifications and Markings

Field Wiring

The IC693MDL655H can use either an external user 24 VDC supply or the isolated +24 VDC supply available at the module connector.

Each isolated group has its own common connection. This allows positive or negative logic wiring according to the field-device arrangement.

The official wiring diagram identifies separate ACOM, BCOM, CCOM, and DCOM connections together with +24 V OUT and 0 V terminals.

Installation & Commissioning

• Verify the complete IC693MDL655H catalog number before replacement.

• Confirm the field circuits use 24 VDC positive or negative logic.

• Preserve the existing A, B, C, and D common wiring.

• Confirm field voltage remains within the 0 to 30 VDC range.

• Check both 24-pin field connectors before applying power.

• Verify individual channel LEDs after installation.

• Confirm all 32 %I input states in the PLC program.

• Observe input derating requirements at elevated ambient temperatures.

Replacement Notes

• Match IC693MDL655H where the installed system requires hardware revision H.

• Do not use E157515 as the catalog number; it is the UL listing identifier.

• Preserve connector orientation and isolated group-common wiring during replacement.

• Verify the hazardous-area approval requirements of the installed application before substitution.