1C31181G02 | Emerson Ovation | Remote I/O Master Attachment Unit (MAU)

Product Summary

The Emerson Ovation 1C31181G02 is a Remote I/O Master Attachment Unit (MAU) for the Emerson Ovation distributed control system (DCS). It serves as the PMOD (Personality Module) master interface for connecting up to 4 remote I/O nodes over a distance of up to 2 kilometers, enabling distributed I/O architecture for large-scale process control applications.

Core Specifications

• Model Number: 1C31181G02
• Type: Remote I/O Master Attachment Unit (MAU) / PMOD Master
• Function: Master attachment unit for remote I/O communication
• Node Capacity: 4 nodes (4N)
• Transmission Distance: 2 km
• Communication: Ovation remote I/O bus to distributed I/O nodes
• Processor: 32-bit microcontroller (per supplier documentation)
• I/O Capacity: Up to 32 I/O points (analog, digital, discrete)
• Scan Rate: Up to 100 ms
• Power Supply: 24V DC
• Dimensions: 370 × 140 × 60 mm (per some suppliers); 7.5 × 7.5 mm (per others — verify with supplier)
• Weight: 0.5–3.0 kg (varies by source — verify with supplier)
• Manufacturer: Emerson (formerly Westinghouse)

Key Features

• PMOD master interface connects up to 4 remote I/O nodes
• 2 km transmission distance for distributed I/O architecture
• 32-bit microcontroller for reliable data processing
• Supports analog, digital, and discrete I/O types
• Modular design for flexible system expansion
• Hot-swappable for online maintenance

Environmental Limits

• Operating Temperature: -20°C to +70°C (-4°F to 158°F) (per some suppliers); -40°C to +85°C (per others)
• Storage Temperature: -40°C to +85°C (-40°F to 185°F)
• Humidity: 5% to 95% RH, non-condensing

Frequently Asked Questions

What is the 1C31181G02 used for?

It is a remote I/O master attachment unit (MAU) for Emerson Ovation DCS, connecting up to 4 remote I/O nodes over 2 km for distributed process control.

What does "4N (2km)" mean?

4N = 4 nodes capacity; 2km = maximum transmission distance of 2 kilometers between the master unit and remote I/O nodes.

What is the difference between 1C31181G01 and 1C31181G02?

The 1C31181G01 is a 2-node (2N) master attachment unit with 2 km range. The 1C31181G02 is a 4-node (4N) version with the same 2 km range, offering higher node capacity.

What is the difference between 1C31181G02 and 1C31181G04?

The 1C31181G02 supports 2 km transmission distance. The 1C31181G04 is a 4-node (4N) version with 3.7 km extended transmission distance.

Installation Guide

Safety Precautions

• De-energize the Ovation rack before installation
• Use proper ESD protection when handling the module
• Verify fiber/cable type matches the 2 km specification

Step-by-Step Procedure

1. Power down the Ovation controller rack
2. Align the module with the rack slot and insert firmly
3. Secure the module retaining clips
4. Connect remote I/O communication cable (fiber or copper)
5. Power up and verify status LEDs
6. Configure remote I/O nodes via Ovation engineering station

Selection Tips

• Verify number of remote I/O nodes required (2N vs 4N)
• Confirm transmission distance (2 km vs 3.7 km) matches your plant layout
• Ensure remote I/O nodes are compatible with PMOD master interface
• For new projects, consider current-generation Ovation remote I/O solutions

Related Part Numbers

• 1C31181G01 — Master Attachment Unit PMOD - 2N (2 km)
• 1C31181G02 — Master Attachment Unit PMOD - 4N (2 km) (this part)
• 1C31181G03 — Master Attachment Unit PMOD - 2N (3.7 km)
• 1C31181G04 — Master Attachment Unit PMOD - 4N (3.7 km)
• 1C31179G01 — Remote I/O MAU Electronics Module
• 1C31179G02 — Remote I/O MAU Electronics Module (alternate)
• 1C31204G01 — Remote I/O Node Module