IC610MDL101B | GE Fanuc Digital Input Modules

The GE Fanuc IC610MDL101B is an 8-point 24 VDC sink digital input module designed for Series One programmable logic controllers (PLCs). It converts discrete ON/OFF field device signals into logic-level data for processing by the Series One CPU module. Powered internally directly through the backplane of the rack power supply, the unit simplifies control cabinet wiring by eliminating the need for an external module power connection.

Signal Processing and System Interface

The module contains eight input circuits configured for current-sinking operation. It interfaces with binary field elements such as limit switches, pushbuttons, photo-eyes, and proximity sensors operating on a nominal 24 VDC system level. The internal circuitry processes inputs with a response time between 4 ms and 15 ms, filtering mechanical contact bounce and electrical line noise to deliver clean discrete signals to the backplane.

Front Panel Diagnostics and Rack Compatibility

Field-side LED indicators are positioned on the front panel to provide immediate visual identification of input status for maintenance staff and operators. The module installs into the local base racks of Series One, Series One Plus, and Series One Model E system architectures. Operating power is provided internally, drawing 14 mA per active ON circuit at 24 VDC and 10 mA at 9 VDC from the backplane power supply bus.

Technical Specifications

Installation and Wiring Guidelines

Before inserting or removing the module from the Series One rack, ensure that main incoming rack power is shut off. Align the module card edge with the guide rails of the target slot on the rack chassis and slide it in firmly until the backplane connector fully seats. Field wiring connects directly to the terminal block. Ensure field DC supply polarity matches the sink input requirements of the module.

Frequently Asked Questions

Q: Does the IC610MDL101B require a separate external power supply to power the module electronics? A: No. The internal logic circuit of the IC610MDL101B is powered directly from the rack power supply through the backplane bus.

Q: What is the difference between a sinking input module and a sourcing input module for Series One systems? A: A sinking input module like the IC610MDL101B provides a current path to circuit ground for the connected field device, requiring the field switch or sensor to supply positive voltage to the terminal when active.

Q: Is the IC610MDL101B compatible with Series One Plus PLC systems? A: Yes, the module is compatible across the GE Fanuc Series One family, including Series One, Series One Plus, and Series One Model E rack architectures.