GE IC200 Modules – IC200MDD843

Technical Dossier

Product Details And Specifications

GE Fanuc IC200 Series Technical Notes

The GE Fanuc IC200 series — commercially designated as the VersaMax Micro and VersaMax Nano product family — represents one of the most widely deployed compact PLC platforms in global heavy industry. Installed across petrochemical refineries, nuclear auxiliary systems, offshore platforms, and continuous-process chemical plants, the IC200 architecture provides a modular, rack-based I/O expansion framework compatible with GE's broader PACSystems ecosystem. The IC200MDD843 is a discrete mixed I/O module within this family, combining 24 VDC inputs and relay outputs in a single compact footprint, making it a standard replacement unit in legacy VersaMax installations worldwide.

The Evolution of IC200 Architecture

The IC200 platform was introduced by GE Fanuc Automation in the mid-1990s as a cost-optimized, DIN-rail-mountable alternative to the Series 90-30 rack system. Early revisions used a proprietary backplane bus operating at low baud rates, limiting I/O scan times. By the early 2000s, GE Fanuc revised the CPU firmware to support faster local bus arbitration and introduced the UDR/UDD universal I/O modules to reduce SKU proliferation across discrete I/O variants.

The IC200 series reached peak deployment between 2000 and 2012. From 2015 onward, GE (later Emerson after the 2018 acquisition of GE's automation division) began transitioning customers toward the RX3i and RSTi-EP platforms. As of 2026, the IC200 series is in the mature/end-of-life phase. OEM spare parts availability from the original manufacturer is limited. Third-party MRO suppliers and certified refurbishers represent the primary sourcing channel for IC200 modules in active plant maintenance programs.

Compatibility note: IC200 modules are not electrically or mechanically interchangeable with IC693 (Series 90-30) or IC695 (RX3i) modules. Backplane connectors, bus protocols, and power rail voltages differ across families.

IC200 Full Catalog & Functionalities (SKU List)

Discrete Output Modules

• IC200MDL740: 32-point 24 VDC positive logic discrete output module, 0.5A per point.
• IC200MDL750: 32-point relay discrete output module, Form A contacts, 2A per point.
• IC200UDD104: 14-point universal discrete module, 8 inputs / 6 relay outputs, 24 VDC.
• IC200UDD112: 20-point universal discrete module, 12 inputs / 8 relay outputs, 24 VDC.

Discrete Input Modules

• IC200MDL650: 32-point 24 VDC positive logic discrete input module.
• IC200MDL660: 16-point 120 VAC discrete input module.

Mixed Discrete I/O Modules

• IC200MDD840: 16-point mixed I/O, 8 inputs / 8 relay outputs, 24 VDC input, 2A relay.
• IC200MDD843: 20-point mixed I/O, 12 inputs / 8 relay outputs, 24 VDC input, 2A relay. Standard replacement module for VersaMax Micro base units.
• IC200MDD844: 20-point mixed I/O, 12 inputs / 8 transistor outputs, 24 VDC, sourcing.
• IC200MDD849: 20-point mixed I/O, 12 inputs / 8 transistor outputs, 24 VDC, sinking.
• IC200MDD850: 28-point mixed I/O, 16 inputs / 12 relay outputs, 24 VDC input.

Analog I/O Modules

• IC200ALG230: 4-channel analog input module, 4–20 mA / 0–10 VDC selectable.
• IC200ALG240: 8-channel analog input module, 4–20 mA / 0–10 VDC selectable.
• IC200ALG260: 4-channel analog output module, 4–20 mA / 0–10 VDC selectable.
• IC200ALG320: 4-channel analog input, thermocouple/RTD, multi-type temperature module.

CPU & Controller Modules

• IC200CPU005: VersaMax Micro CPU, 14 I/O points onboard, 12K word program memory.
• IC200UDR005: VersaMax Nano all-in-one controller, 8 inputs / 6 relay outputs, 24 VDC.

Power Supply Modules

• IC200PWR001: 24 VDC input power supply for VersaMax Micro expansion bases.
• IC200PWR002: 120/240 VAC input power supply for VersaMax Micro expansion bases.

Expansion Bases / Chassis

• IC200CHS006: 6-slot VersaMax Micro expansion base, DIN-rail mount.
• IC200CHS022: 22-slot VersaMax Micro expansion base for high-density I/O configurations.

Quality Control for the IC200 Range

IC200 modules use a proprietary backplane edge connector and internal bus arbitration logic that requires functional testing under live bus conditions — visual inspection alone is insufficient to verify module integrity. DriveKNMS applies the following test protocol to all IC200 units:

• Backplane bus communication verification using a reference IC200 CPU and expansion base.
• Point-by-point I/O functional test: each discrete input channel is stimulated at rated voltage; each output channel is loaded and verified for switching response and contact resistance (relay outputs) or saturation voltage (transistor outputs).
• Analog module calibration check: input accuracy verified against a calibrated signal source; output linearity verified across the full 4–20 mA or 0–10 VDC range.
• Power supply modules tested under rated load for output voltage stability and ripple.
• Thermal soak: modules operated at elevated ambient temperature for a minimum of 2 hours to screen latent component failures.

All tested units are issued a DriveKNMS inspection record with test date, technician ID, and pass/fail data for each test point.