GE IC693MDL646E Positive / Negative Logic Input Module for Series 90-30

The GE IC693MDL646E captures sixteen discrete input signals with flexible polarity selection. You can install this module directly into any Series 90-30 rack slot. It accepts both positive and negative logic field devices. This unit suits sensors with sinking or sourcing output configurations.

Technical Specifications and Hardware Layout

This input module measures 127 mm in height. Its width reaches 55 mm, and the depth equals 140 mm. The GE IC693MDL646E weighs approximately 0.32 kilograms. A single internal PCB holds all input filtering and isolation circuits. The module provides sixteen channels for 24 V DC inputs. It stores no energy in capacitors or internal batteries. One 48-pin front connector handles all field wiring connections. Sixteen green LEDs display the real-time status of each channel.

Input Specifications and Polarity Configuration

The GE IC693MDL646E accepts input voltages from 0 V to 30 V DC. For positive logic mode, a logic “1” occurs at 15 V DC or higher. For negative logic mode, a logic “1” occurs at 5 V DC or lower. Each channel draws a typical input current of 7 mA at 24 V DC. A DIP switch selects the polarity for all sixteen channels simultaneously. Consequently, this module works with both sourcing and sinking sensor types. An internal RC filter debounces input signals with a 1 ms time constant. Optical isolation separates the field side from the backplane logic.

Installation and Practical Application Tips

You must snap this module firmly into a standard 90-30 rack slot. Transitioning to wiring, use 0.5 mm² to 1.5 mm² solid or stranded wires. The screw-type terminals require a 3 mm flathead screwdriver for tightening. Set the DIP switch before powering up the module for correct polarity. The operating temperature range extends from 0°C to 60°C reliably. This module consumes only 50 mA from the backplane bus.