ABB 07 NG 81 Power Supply Module

This power supply module provides DC power for ABB Procontic control systems. It converts AC line voltage to regulated outputs for backplane modules. Therefore, this component ensures reliable operation of industrial automation controllers.

Physical Dimensions and Weight Specifications

The ABB 07 NG 81 features a rugged metal housing for heat dissipation. Its width occupies a single slot in the Procontic rack. The total depth reaches 250 mm for backplane connectivity. Consequently, technicians can install this unit alongside other modules without spacing issues.

Interface Types and Connection Layout

The ABB 07 NG 81 provides a 3-terminal AC input block on the top. A 4-terminal DC output block connects directly to the backplane bus. The front panel carries LED indicators for output status and overload warnings. Hence, operators can monitor power conditions at a quick glance.

Component Count and Internal Architecture

This power supply contains one main transformer and a rectifier bridge circuit. The board holds four large electrolytic capacitors for output filtering. You will also find a linear regulator for clean 5V output. An onboard thermal fuse shuts down the unit during overheating events.

Energy Storage and Hold-Up Time

The ABB 07 NG 81 stores energy in four 1500µF output capacitors. This storage provides a 25 ms hold-up time after AC loss. Therefore, the backplane modules continue operating during brief power interruptions. The unit requires no external battery for this function.

Protection Features and Operating Limits

The module includes short-circuit protection on both output rails. It also features over-voltage clamping for sensitive backplane components. Users can operate this supply in temperatures from 0°C to 55°C. Natural convection cooling eliminates the need for an internal fan.