General Electric IC693MDL644 Series 90-30 24 VDC Negative Logic Fast Input Module

Description

The General Electric IC693MDL644 is a 16-point, 24 VDC negative logic fast input module designed for GE Fanuc Series 90-30 programmable logic controller systems. It provides the digital interface between the PLC backplane and external discrete field devices that require rapid signal acquisition, such as high-speed proximity switches, optical sensors, pushbuttons, and limit switches. Operating with negative logic circuitry, the input channels source current out to external input devices that switch the signal circuit to the negative power reference.

Unlike standard Series 90-30 DC discrete modules that feature typical signal filtering delays of 7 ms, the IC693MDL644 delivers an accelerated response time of typically 1 ms. All 16 points are organized in a single common group, sharing an internal common circuit served through a front-mounted 20-position removable terminal connector. High-voltage isolation protects the internal backplane logic circuitry against field transients and ground fault noise.

Features

• 16 discrete DC input channels in a single common group.
• Fast input response time rated at typically 1 ms for time-critical sensing.
• Negative logic design where field switches connect between input terminals and the negative supply bus.
• 1500 V isolation between field-side input circuits and PLC logic side.
• Two rows of green LED indicators (A1 to A8 and B1 to B8) displaying real-time ON/OFF channel status.
• Removable 20-terminal front connector block to facilitate fast wiring, module maintenance, and board replacement.
• Standard blue faceplate insert marking designating low-voltage DC module classification.

Technical Specifications

Field Wiring and Connections

Field wiring connects directly to the 20-pin removable terminal strip on the front face of the module. Because the IC693MDL644 operates with negative logic, input circuits source current from within the module out through the field sensor or mechanical switch contacts. The returning line from each field device connects to the common negative (-) DC bus. Power to operate input field devices can be supplied via an external 24 VDC power supply or taken from the isolated +24 VDC supply available on the Series 90-30 baseplate power supply unit.

Compatibility

The IC693MDL644 installs in any standard discrete I/O slot within a Series 90-30 baseplate rack, including 5-slot and 10-slot CPU racks, expansion baseplates, and remote I/O baseplates. It is configured using Logicmaster 90, VersaPro, or Proficy Machine Edition software environments. The module is also supported within PACSystems RX3i architectures utilizing Series 90-30 expansion racks or through migration backplane adapters.