ABB NGPS-02C 64008587D Power Supply Board

ABB NGPS-02C 64008587D Power Supply Board

Functional Description

Inverter modules equipped with the Prevention of Unexpected Start option have an additional board (NGPS)

fitted. This board provides the control voltage for the output stage of the inverter module. The NGPS

board in turn is powered from the 230/115 V AC auxiliary power circuit via a normally-closed switch installed

by the customer in a suitable location (for example, a control desk). By opening this switch, the operator can

block the control voltage to the inverter power stage, so the voltage needed to rotate the motor cannot be

generated.

In addition to the switch, a relay is to be connected in parallel with the power input of the NGPS board. A

normally-open contact of this relay is wired to a digital input of the inverter unit. (This is to prevent

erroneous control of the power stage and possible damage in case the switch is opened while the inverter is

running.)

Technical Specifications