1C31179G02 Westinghouse Ovation Remote I/O Module (Master Attachment Unit)

Emerson Ovation 1C31179G02 – Remote I/O Module (Master Attachment Unit)

The Emerson Ovation 1C31179G02 is a Remote I/O Module (RIOM), also known as a Master Attachment Unit (MAU), that extends Ovation DCS I/O capabilities to remote locations. It connects field sensors and actuators to the central controller via serial or network links, reducing cabling costs and improving signal integrity.

• Module Type: Remote I/O Module / Master Attachment Unit (MAU)
• Channels: 16 digital inputs and 8 digital outputs
• Input Voltage: 24 VDC
• Output Voltage: 5 VDC / 24 VDC
• Communication: RS-485, Modbus, Ethernet/IP
• Input Impedance: 10 kΩ
• Output Current: 500 mA per channel
• Operating Temperature: −40°C to +70°C
• Dimensions: 121 mm × 52 mm × 166 mm
• Weight: 0.3 kg
• Mounting: Standard Ovation I/O rack or DIN rail

Technical Specifications

FAQ

1. G01 vs G02 Differences
   G02 is an enhanced revision with expanded communication options and higher channel density. G01 is the base revision.
2. Remote I/O Distance
   Over RS-485, the maximum distance is 1200 m. Over fiber with PMOD adapter 1C31181G0x, the maximum distance is 3.7 km depending on fiber type and transceiver.
3. Mixed Analog and Digital I/O
   Remote nodes host a mix of analog input, analog output, digital input, and digital output modules. The MAU manages communication for all modules in its node.
4. Ovation 3.x Compatibility
   The module is compatible with Ovation 3.x using appropriate firmware and personality files.

Installation Guide

• Step 1: Mount 1C31179G02 in a remote I/O enclosure near field devices. Ensure the environmental rating matches the installation location.
• Step 2: Install companion I/O modules (AI, AO, DI, DO) in the remote node rack connected to the MAU.
• Step 3: Connect communication cable. For copper RS-485, use shielded twisted pair. For fiber, install 1C31181G0x PMOD and connect fiber patch cords.
• Step 4: In Ovation Developer Studio, add the remote node. Assign the node address and download the I/O configuration to the MAU.
• Step 5: Verify communication. Check the node status LED (green = online, red = fault). Confirm all remote channels appear in the controller tag database.

Selection Tips

Select 1C31179G02 for remote I/O expansion when field devices are more than 100 m from the central controller. It reduces analog signal degradation over long cable runs. For distances above 2 km, pair with fiber-optic PMOD modules (1C31181G01–1C31181G04). For local I/O expansion only, standard chassis-mounted I/O modules are more economical.