ABB Bailey NASO01 Analog Output Module

This analog output module provides precise control signals for actuators and valves. The ABB Bailey NASO01 generates eight independent 4-20mA output channels for field devices. Each channel delivers a regulated current signal for positioning I/P converters and motor drives. Consequently, plant engineers can achieve accurate process control for flow, pressure, and level loops.

Technical Specifications of the Analog Output Module

The ABB Bailey NASO01 measures 180 mm in width and 240 mm in height. Its depth reaches 45 mm for standard INFI 90 rack mounting. The module weighs approximately 0.62 kg including all output and isolation circuitry. A single front panel LED array shows loop power and channel fault status. The front side features a removable screw terminal block for field wiring connections. This design stores minimal energy in small filtering capacitors only. Therefore, the module contains no batteries or large energy storage elements.

Parameter	Specification
Brand	ABB Bailey
Full Model	NASO01
Category	Analog Output Module
Dimensions (W x H x D)	180 mm x 240 mm x 45 mm
Weight	Approximately 0.62 kg
Output Channels	8 independent outputs
Output Type	4-20mA (sourcing)
Output Range	0-22mA (overrange capability)
Resolution	14-bit
Accuracy	±0.15% of full scale
Loop Power	24V DC from external supply
Maximum Load	750 ohms per channel
Terminal Type	Removable screw blocks
Energy Storage	Minimal (filtering only)
Supply Voltage	24V DC from backplane
Response Time	5 ms typical

Functional Features and Output Protection

The ABB Bailey NASO01 includes per-channel short circuit and open loop detection. You can configure each output for 4-20mA or 0-20mA operation independently. The module automatically reports output faults to the INFI 90 controller. Each channel also features a red LED indicator for loop fault conditions. Consequently, maintenance teams can identify failed field devices without disconnecting wires.

Installation and System Integration

You must install this analog output module into a standard INFI 90 rack slot. The ABB Bailey NASO01 connects to the backplane automatically upon full insertion. A removable terminal block accepts field wiring from 14 to 22 AWG. The module requires an external 24V DC supply for loop power. Always verify load resistance before connecting actuators to the output channels.

Maintenance and Operational Benefits

Because the ABB Bailey NASO01 stores no battery-backed data, it needs no periodic battery changes. Technicians can replace the module without losing any calibration or configuration settings. The transparent terminal cover prevents accidental contact with live loop wires. Consequently, this analog output module offers safe and reliable service for critical control loops.