The GE Fanuc / Emerson IC693MDL654 is a 32-point, 5/12 VDC (TTL Level) Positive/Negative Logic Discrete Input Module for the Series 90-30 PLC platform.

Unlike standard 24VDC PLC inputs, this module is engineered for low-voltage TTL logic thresholds, making it suitable for interfacing with TTL encoders, microcontroller circuits, laboratory equipment, or customized sensor electronics.

Key Technical Specifications

Module Type: High-Density Discrete Input Module

Channel Count: 32 Input Channels, divided into 4 isolated groups of 8 (A1–A8, B1–B8, C1–C8, D1–D8)

Nominal Voltage: 5 VDC to 12 VDC

Input Voltage Range: 0 VDC to 15 VDC

Signal Thresholds:

ON State Voltage: 4.2 VDC to 15 VDC

OFF State Voltage: 0 VDC to 2.6 VDC

Logic Compatibility: Positive (Sinking) or Negative (Sourcing) Logic

Input Current Draw: 3.0 mA @ 5 VDC (typical); 8.5 mA @ 12 VDC (typical)

Isolation: 1,500V optical isolation between field side and backplane logic; 250V isolation between input groups

Backplane Power Draw: 195 mA from the +5V bus

Connectors: Two 24-pin male Fujitsu connectors on the front face (rather than standard screw terminal blocks)

Key Features & Power Options

Internal Power Option: The module generates an onboard +5V power supply (isolated from the PLC backplane). Using jumper settings on the front connectors, you can choose to power field inputs using this internal 5V supply instead of an external field power supply.

High-Density Form Factor: Occupies a single slot while offering 32 discrete inputs (%I points), utilizing two 24-pin Fujitsu connectors (FCN-365P024-AU).

Visual Status LEDs: Features 32 status LEDs at the top of the module organized into four rows (A, B, C, D) corresponding to each 8-channel group.

Common Applications

TTL Interface: Reading 5V TTL logic level outputs directly from specialized sensors or custom PCB controls without external level shifters.

Optoelectronic & Encoder Inputs: Receiving low-voltage pulse or position signals from devices using 5V/12V signaling.

High-Density Control Panels: Conserving rack space when an OEM machine requires a large quantity of low-voltage inputs.