Quadnet Power Supply Unit Installation Manual
12
PSU Terminals
Mains Input: L, N, E
The 230V AC input is to be connected into the terminals provided on the Charge Controller Unit. This input
is protected by the 4AT live and neutral fuses adjacent to the terminals. Please use caution as double pole
live and neutral fusing is used.
Battery Connections: +24V, 0V
The battery terminals require 24V from 2 x 12V 17Ah sealed lead acid batteries, connected in series, in
order to provide secondary backup power when the primary power fails. This input is protected by the 10AT
fuse adjacent to the terminals.
Fault Relay: NO, NC, COM
The Fault relay is a single-pole change-over ‘volt-free’ relay contact. The relay contacts are rated at 30V
DC / 1A max. All inductive loads should be diode protected to prevent back EMF. However, if this is not
done, the load should be limited to 200mA to reduce the likelihood of back EMF causing damage to the
relay contacts.
The relay is de-energised in the fault condition.
Terminal
Description
COM
Common contact
NC
Normally closed contact
NO
Normally open contact
PSU OUTPUT TO CIE: SCRN, 0V, +24V, SCRN, 0V, +24V
The PSU OUTPUT connections connect the DC power from the PSU to the main control panel.
COM
NO
NC
ON BOARD PCB
EXTERNAL CONNECTIONS
ON BOARD PCB
EXTERNAL CONNECTIONS
TWO CABLES TO PSU INPUT
TERMINALS ON CONTROL PANEL
BACKPLANE
SCRN
OV
+24V
SCRN
SCRN
OV
+24V
SCRN
OV
OV
+24V
+ 24V
CN1
CN2
