ABB Bailey NIOP04 | Power Panel

This power panel distributes DC power to field devices and I/O modules. It converts incoming AC voltage into regulated 24V DC outputs. The unit mounts on a DIN rail inside the control cabinet.

Technical specifications

Parameter	Specification
Brand	ABB Bailey
Model	ABB Bailey NIOP04
Product Family	INFI 90
Category	Power Panel
Input Voltage	120/240V AC (selectable)
Input Frequency	47 to 63 Hz
Input Current	1.2A at 120V AC, 0.6A at 240V AC
Output Voltage	24V DC (regulated)
Output Current	4A total (2A per channel maximum)
Number of Output Channels	4 (four) individually fused
Output Fuses	4 x 2A fast-blow
Hold-up Time	20 ms at full load
Efficiency	Approximately 85%
Status Indicators	4 x LEDs (output status per channel), 1 x PWR
Terminal Type	Screw clamp
Wire Gauge	24 to 12 AWG
Component Count	1 transformer, 1 rectifier, 4 fuses, 8 capacitors
Energy Storage	4 x electrolytic capacitors (1000 µF each)
Cooling Method	Convection (no fan)
Dimensions (L x W x H)	Approx. 20 cm x 12 cm x 8 cm
Weight	Approx. 1.8 kg
Operating Temperature	-10°C to 55°C
Mounting	DIN rail (EN 50022)

Detailed Technical Analysis

This power panel accepts either 120V or 240V AC input voltage. A slide switch on the side selects the correct input range. The unit then produces a regulated 24V DC output at 4 amps total. Four individual output channels each provide up to 2 amps.

Now let us examine its protection features. Each output channel has a separate 2A fast-blow fuse. This design prevents a single fault from shutting down all field power. Four LEDs indicate the status of each output channel. A separate green LED shows that input power is present.

This power panel uses convection cooling without any internal fan. The design eliminates fan noise and maintenance requirements. The ABB Bailey NIOP04 weighs 1.8 kilograms for stable DIN rail mounting. Four electrolytic capacitors store energy for 20 milliseconds of hold-up time.

Installation and Wiring Guidelines

You mount this panel on a standard DIN rail in your control cabinet. Connect the AC input wires to the designated terminal block. Use 14 AWG or larger wire for the AC supply connection. Connect your 24V DC field devices to the four output channel terminals.

For safety, connect a proper earth ground to the grounding terminal. Do not exceed 2 amps on any single output channel. Replace blown fuses only with identical 2A fast-blow types. The convection cooling requires adequate space around the unit for airflow.

Practical Applications

Engineers use this power panel for INFI 90 field device power distribution. It supplies 24V DC to transmitters, sensors, and relay coils. This component also works in legacy DCS retrofit projects. Its four fused outputs suit distributed field power applications.

Summary of Features

To conclude, this power panel provides 4 amps of 24V DC across four fused outputs. It weighs 1.8 kilograms and uses convection cooling. Choose ABB Bailey NIOP04 for reliable field device power distribution in INFI 90 systems.