IC694MDR390 GE Fanuc PACSystems Mixed I/O Terminal Board

Product Description

The IC694MDR390 is a high-efficiency mixed discrete I/O module designed for the GE Fanuc PACSystems RX3i platform. This module integrates 8 isolated DC inputs and 8 isolated relay outputs into a single-slot footprint, offering a compact solution for applications that require both sensing and switching capabilities. By combining inputs and outputs on one card, the IC694MDR390 significantly reduces backplane occupancy and wiring complexity in localized control panels.

The input section supports 12/24 VDC signals and is software-configurable for sinking or sourcing circuits. To ensure high reliability and noise immunity, each input is individually isolated. The output section features normally-open mechanical relays capable of switching both AC and DC loads up to 2.0 Amperes. These relays are organized into two groups of four, providing flexible voltage potential options for controlling solenoids, motor starters, and auxiliary indicators. For real-time troubleshooting, the module faceplate includes LED indicators that display the logic state of every I/O point.

Technical Specifications

• Model Number: IC694MDR390

• Manufacturer: GE Fanuc (Emerson Automation)

• Series Compatibility: PACSystems RX3i Only

• I/O Type: Mixed Discrete (8 Input / 8 Output)

• Input Voltage: 12/24 VDC (Range: 10 to 30 VDC)

• Input Configuration: Sinking or Sourcing (User-defined)

• Output Type: Isolated Mechanical Relay (Normally Open)

• Relay Current Rating: 2 A at 30 VDC / 2 A at 250 VAC (Resistive)

• Output Groups: Two isolated groups (4 outputs per group)

• Isolation: 250 VAC continuous; 1500 VAC for 1 minute

• External Power: User-supplied supply required for relay coils

• Terminal Block: 20-pin removable terminal connector

• Operating Temperature: -20 °C to +60 °C (-4 °F to 140 °F)

• Dimensions: 8.2 cm x 12.2 cm x 6 cm

• Weight: 0.36 kg

• Country of Origin: United States (USA)

• Compliance: IEC 61326-1, industrial EMC standards

Application & Load Considerations

The IC694MDR390 is ideal for small process skids and auxiliary equipment where rack space is limited. When controlling inductive loads—such as contactors or solenoids—external surge suppression (diodes for DC or varistors for AC) is recommended to maximize the mechanical life of the relay contacts. As this module is specific to the RX3i serial/PCI backplane, it provides the high-speed data throughput necessary for deterministic control logic that older Series 90-30 modules cannot match.

Frequently Asked Questions

Is the IC694MDR390 compatible with Series 90-30 PLCs?

No. While it shares a similar physical profile, the IC694MDR390 utilizes the RX3i high-speed serial bus. It must be used in an RX3i Universal Backplane (IC695) or Expansion Backplane (IC694).

Does this module require an external power supply?

Yes. While the module logic is powered via the backplane, an external power source must be wired to the terminal block to energize the relay coils and the field-side loads.