NPU, SW Version 1.8, ©ComAp, September 2003
NPU-1.8r2.PDF 6
3. Installation
Power Supply
There are two types of NPU units – see chapter 7 – Order codes:
NPU XXX/YYY/230VAC power supply is in range 90 ÷ 250 VAC
NPU XX/YYY/24VDC power supply is in range 16 ÷ 110 VDC
Power supply polarity is not important in the case of DC power. The terminal PE is only as an anti-
interference terminal.
Analog Inputs
The rated voltage (100, 230, 400, 480 VAC) is selected by order. Terminals are designed for connection of
either phase-to-phase or phase-to-neutral voltage measurement. For connection see wiring diagram.
Output Relays
See wiring diagram. Relays on figure are without supply voltage (failure situation)
To Next Page
Loading...
Need help?
General
