GE IC200MDD844 VersaMax Discrete Mixed I/O Module
The IC200MDD844 is a GE Fanuc VersaMax discrete mixed I/O module. It delivers 32 points with 16 sourcing outputs and 16 inputs. The unit runs on a 5 V backplane and offers fast 0.5 ms response.
GE IC200MDD845 Combination Discrete I/O Module for VersaMax Systems
Product Introduction
The IC200MDD845 is a 24-point combination discrete I/O module from the VersaMax I/O series. GE Intelligent Platforms originally produced this module, and Emerson Automation now supports it. The unit combines 16 positive logic inputs with 8 individually isolated Form A relay contact outputs. This mixed design lets one module handle both sensing and switching tasks.
Industrial panels often need relay outputs for controlling higher-power loads. The IC200MDD845 addresses this need with its Form A normally open contacts. Each output is individually isolated, which improves safety and reduces cross-channel interference. Meanwhile, the 16 input channels accept a nominal 24 VDC signal. As a result, the module fits distributed I/O stations and native CPU control systems alike.
Technical Specifications
The table below lists the main technical data for the IC200MDD845 module.
| Parameter | Value |
|---|---|
| Brand | GE Intelligent Platforms / GE Fanuc |
| Series | VersaMax I/O |
| Part Number | IC200MDD845 |
| Product Type | Combination Discrete I/O Module |
| I/O Channels | 24 |
| Inputs | 16 positive logic |
| Outputs | 8 Form A relay contacts |
| Input Signal, Nominal | 24 VDC |
| Input Signal, Range | 18 to 30 VDC |
| On-State Current | 2.0 to 5.5 mA |
| Off-State Current | 0 to 0.5 mA |
| Contact Rating | 2.0 A at 5 to 265 VAC |
| Contact Rating | 2.0 A at 5 to 30 VDC |
| Contact Rating | 0.2 A at 31 to 125 VDC |
| Minimum Load | 10 mA per point |
| Backplane Current | 270 mA maximum |
| Frequency | 47 to 63 Hz |
| LED Indicators | Individual channel LEDs plus OK LED |
Each output channel is individually isolated, which supports channel-to-channel isolation. However, the module does not include snubbers or internal fuses. Therefore, external protection may be needed for inductive loads. The output voltage range spans 0 to 125 VDC and 0 to 265 VAC. Nominal output voltages include 5, 24, and 125 VDC, plus 120 and 240 VAC.
Response Time and Status Monitoring
The IC200MDD845 provides fast response for input and output channels. Typical ON transition time is 0.5 milliseconds, while OFF transition time is 10 milliseconds. This speed suits many discrete control applications. However, engineers should account for the slower OFF response when designing timing-critical logic.
Individual LED indicators serve each input and output channel. These LEDs allow local monitoring of the actuation and energization state. Moreover, an OK LED confirms that backplane power reaches the module. Consequently, technicians can diagnose wiring faults quickly. This visual feedback reduces commissioning time and simplifies routine maintenance. The module needs an IC200CHS series carrier base for proper mounting and connection.
Power and Load Considerations
The IC200MDD845 draws power from the backplane. The maximum backplane current consumption reaches 270 mA. This figure depends on the number of active I/O points. Additionally, any external loads require a separate power source. The module does not supply field power on its own.
Input channels draw an on-state current of 2.0 to 5.5 mA. Meanwhile, the off-state current stays between 0 and 0.5 mA. For outputs, the minimum load is 10 mA per point. Resistive load ratings reach 2.0 A at 5 to 265 VAC and 5 to 30 VDC. Besides, the rating drops to 0.2 A at 31 to 125 VDC. These limits protect the relay contacts from overheating.
Mechanical and Environmental Parameters
The IC200MDD845 uses the standard VersaMax form factor. Its dimensions measure 110 mm (4.3 in) in width, 66.8 mm (2.63 in) in length, and 50 mm (1.956 in) in depth. These compact sizes help with efficient cabinet layout. The module mounts on a carrier base inside a control panel.
The input voltage operates at a nominal 24 VDC. Meanwhile, the output voltage range covers 0 to 125 VDC and 0 to 265 VAC. The frequency range spans 47 to 63 Hz. Proper grounding and shielding reduce electrical noise. Also, adequate airflow around the module maintains stable thermal performance. Keep the cabinet within recommended temperature and humidity limits.
Installation Guide
First, turn off all power before mounting the IC200MDD845 module. Next, attach the unit to an IC200CHS series carrier base. Then, slide the assembly onto the DIN rail until it locks. After that, connect the field wiring to the correct terminals. Remember that two groups hold 8 inputs each, and one group holds 8 outputs.
Furthermore, use wiring rated for the relay contact load. Keep high-voltage output cables away from low-level input signals. Meanwhile, verify the input voltage stays within the 18 to 30 VDC range. Finally, apply power and check the LED indicators. Confirm that each channel responds correctly before full operation.
Packaging List
1 x GE Fanuc IC200MDD845 Combination Discrete I/O Module
1 x Anti-static protective bag
1 x Original cardboard box
FAQ
Q1: What is the main function of the IC200MDD845 module?
A1: The IC200MDD845 combines discrete inputs and relay outputs in one unit. It provides 24 channels for VersaMax control systems.
Q2: How many inputs and outputs does this module offer?
A2: The module provides 16 positive logic inputs and 8 Form A relay outputs. Each output is individually isolated.
Q3: What is the maximum backplane current consumption?
A3: The module draws up to 270 mA from the backplane. External loads require a separate power source.
Q4: What load ratings do the relay outputs support?
A4: The contacts handle 2.0 A at 5 to 265 VAC and 5 to 30 VDC. The rating falls to 0.2 A at 31 to 125 VDC for resistive loads.
Q5: Does the IC200MDD845 include internal fuses or snubbers?
A5: No, the module lacks internal fuses and snubbers. Therefore, users should add external protection for inductive loads.
