IMASO01 | ABB Bailey Analog Output Slave Module

ABB Bailey IMASO01 Analog Output Slave Module

The ABB Bailey IMASO01 is an Analog Output Slave Module for the INFI 90 distributed control system. It converts digital control commands from the Multi-Function Processor into precise analog current or voltage signals to drive field actuators, control valves, and variable speed drives.

Key Specifications

• Part Number: IMASO01
• Assembly Number: 6637841A1 / 6637841L1
• Product Type: Analog Output Slave Module
• Series: INFI 90 / Symphony
• Manufacturer: ABB / Bailey Controls
• Output Channels: 4 analog output channels
• Output Ranges: 4–20 mA, 1–5 VDC, or 0–10 VDC (configurable)
• Power Requirements: +5 VDC, ±15 VDC, +24 VDC; approx. 15.8 VA
• Dimensions: 178 × 51 × 330 mm (7.0" × 2.0" × 13.0")
• Weight: 0.231 kg (0.51 lbs)
• Operating Temperature: 0°C to 60°C
• Storage Temperature: -40°C to 85°C
• Humidity: 5% to 95% non-condensing
• Mounting: INFI 90 MMU rack slot

Features & Benefits

1. 4-Channel Output: Drives up to four independent analog control loops from a single module.
2. Multi-Range Configurable: Software-selectable 4–20 mA, 1–5 VDC, or 0–10 VDC output ranges.
3. High Resolution: Precision D/A conversion ensures smooth, accurate actuator positioning.
4. Loop Power Option: Some configurations support loop-powered 4–20 mA outputs for two-wire transmitters.

Applications

• Control valve positioning (4–20 mA)
• Variable frequency drive speed reference
• Damper and actuator control
• Process setpoint signaling

FAQ

Q: Can IMASO01 output voltage signals?
A: Yes. The IMASO01 supports both current (4–20 mA) and voltage (1–5 VDC, 0–10 VDC) outputs, selectable via software configuration.

Q: What termination unit pairs with IMASO01?
A: Use the NTAO01 Analog Output Termination Unit or compatible termination assembly for field wiring.

Installation Guide

1. Install IMASO01 into INFI 90 MMU rack.
2. Connect analog output signals to NTAO01 termination unit.
3. Configure output range per channel in MFP function block.
4. Verify output linearity with a calibrated multimeter.
5. Connect to field actuators and perform stroke tests.

Selection Tips

• Load Impedance: Verify field device input impedance is within the module's drive capability (typically 750 Ω for 4–20 mA).
• Channel Count: 4 channels per module; scale quantity to match your analog output requirements.