GE IC200MDD840 Product Review: A Versatile 32-Point Combo I/O Module
The GE IC200MDD840 is a 32-point combination discrete I/O module from the VersaMax series, formerly by GE Intelligent Platforms and now under Emerson Automation. This module provides twenty 24 VDC positive logic inputs and twelve Form A relay outputs rated at 2.0 amperes. It suits engineers who need both input and output capability in a single compact unit. The module draws a maximum backplane current of 375 mA, making it efficient for many industrial control panels.
Key Technical Specifications of the GE IC200MDD840
The IC200MDD840 offers 32 I/O points: 20 inputs and 12 outputs. Input signal is nominal 24 VDC with a range of 0-30 VDC. On-state current is 2.0 to 5.5 mA, and off-state current is 0 to 0.5 mA. Inputs are positive-logic/sourcing type, arranged in two groups of ten. On-state voltage range is +15 to +30 VDC, and off-state voltage range is 0 to 0.5 mA. Typical signal transition delay is 0.5 ms maximum. Input impedance is 10k ohms maximum. The module supports configurable filter times of 0 ms, 1.0 ms, and 0.7 ms, with 1.0 ms as the default.
The relay outputs are Form A (normally open) contacts arranged in two groups of six outputs each. Contact output rating is 10 mA per point minimum, 8.0 A maximum per module. For resistive loads, the ratings are: 2.0 A for 5 to 265 VAC maximum, 2.0 A for 5 to 30 VDC, and 0.2 A for 31 to 125 VDC. Output voltage range is 0 to 125 VDC or 0 to 265 VAC (47-63 Hz). External power is required for output loads, while the module draws power from the backplane.
Practical Value and Use Cases for the GE IC200MDD840
This module provides a balanced mix of discrete inputs and relay outputs in a single package. It reduces wiring and saves rack space compared to separate input and output modules. The relay outputs handle both AC and DC loads up to 2 A, making them flexible for controlling valves, contactors, or indicator lamps. The 24 VDC inputs accept sourcing signals from sensors or PLC outputs. Configurable filter times help eliminate false signals in electrically noisy environments.
Installation is straightforward on a VersaMax backplane. The module includes individual channel LED indicators and an OK LED for status. Dimensions are 110 mm x 66.8 mm x 50 mm (4.3 x 2.63 x 1.956 inches), excluding carrier height. The module does not include internal fuses or channel-to-channel isolation, so external protection may be necessary for critical applications.
Overall, the GE IC200MDD840 is a reliable choice for automation engineers seeking a compact, combined discrete I/O solution within the VersaMax ecosystem. Its clear specifications and configurable inputs make it suitable for many standard industrial control tasks.