Installing Power Supply Units
31
Connecting a PSU to AC mains power
To connect the Exterior 50 & 100 PSU to AC mains power:
1. Check that the system is isolated from AC mains power and that
power cannot be reapplied during work on the system.
Wire
(US system)
Wire
(EU system)
Pin
Marking
Screw
color
black
brown
live
L
yellow or
brass
white
blue
neutral
N
silver
green
yellow/green
ground
(protective earth)
or
or
PE
green
Table 2: Power plug pin and power cable wiring identification
Figure 10: AC mains power connections in PSU
Quick-lock
terminals
Power cable from
previous section
Power cable to
next section
Preparation of
power cable
Preparation of
power cable
90
50
AC power IN/OUT
PIN
Function
6
PE
5
4
N
3
2
L
1
Press to
open