ABB 0776 169 D Power Supply | 24V 1.3A, 31.2W, 85% Efficiency

This power supply unit energizes ABB control racks and field devices. The ABB 0776 169 D converts AC mains voltage into stable DC output. You can mount this unit inside standard industrial control cabinets. Its rugged design supports continuous operation in demanding factory environments.

Physical Dimensions and Mounting Configuration

The ABB 0776 169 D measures 11.5 cm in overall width. Its total depth reaches 16.2 cm including terminal covers. This power supply weighs approximately 0.95 kg. A metal enclosure provides excellent heat dissipation and shielding. Four mounting screws secure the unit to a DIN rail or backplate.

Input and Output Specifications

This unit accepts 85 to 264V AC input voltage automatically. The ABB 0776 169 D delivers 24V DC at 1.3A continuously. Output power reaches 31.2W under normal operating conditions. Built‑in overload protection shuts down the unit during short circuits. Furthermore, the module resumes operation automatically after fault removal.

Parameter	Specification
Product Type	Switch mode power supply
Input Voltage Range	85 to 264V AC ±10%
Input Frequency	47 to 63 Hz
Inrush Current	15A max at 230V AC
Output Voltage	24V DC ±1%
Output Current	1.3A continuous
Output Power	31.2W
Ripple and Noise	< 30 mV peak‑to‑peak
Efficiency	85% typical at full load
Hold‑Up Time	25 ms at 230V AC
Dimensions (W x H x D)	115 mm x 75 mm x 162 mm
Weight	0.95 kg (2.09 lbs)
Terminal Type	Screw terminals (input: 3 pins, output: 4 pins)
Number of Components	1 main PCB, 1 heatsink, 1 fan
Internal Energy Storage	330 µF main capacitor
Protection Features	Overload, short circuit, overvoltage
LED Indicators	DC OK (green)
Operating Temperature	-10°C to +55°C
Cooling Method	Natural convection

Energy Storage and Hold‑Up Performance

A 330 µF capacitor stores energy for brief power interruptions. The ABB 0776 169 D provides 25 ms of hold‑up time at full load. This storage allows the CPU to complete critical operations safely. Consequently, system shutdowns occur gracefully rather than abruptly.

Protection Circuits and Diagnostic Features

Overload protection activates when output current exceeds 1.6A. Short circuit protection responds within 40 µs of fault detection. The green DC OK LED confirms proper output voltage presence. Therefore, maintenance personnel can verify power status at a glance. Overvoltage protection clamps the output at 28V maximum.

Installation and Wiring Guidelines

Connect the AC input wires to the three‑pin terminal block. The ABB 0776 169 D accepts wire sizes from 0.5 to 2.5 mm². Route DC output wires separately from AC input cables. This separation reduces electrical noise on the 24V DC bus. Proper grounding improves system reliability significantly.