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Chapter 4: Installing the Switch and its Power Supplies
70
as this equipment.
Switching or disconnecting devices shall not be in the earthed
circuit conductor between the DC source and the point of
connection of the earthing electrode conductor.
Warning
Enough wiring space is required to allow the conductors to be
introduced and connected easily.
To power on a switch with a DC AT-PWR250R-80 Power Supply Module,
review the essential safety information above and perform the following
procedure:
1. Power off the DC circuit to be used for the chassis.
2. Verify that the On/Off switch on the DC AT-PWR250R-80 Module is in
the Off position.
3. Use the legend above the terminal block to identify the terminals. The
terminals are positive, power supply ground and negative, from left
to right, as shown in Figure 32 on page 70.
A
A
+48 VDC Positive
Terminal
DC Terminal Block on the DC AT-PWR250R-80 Power Supply
Figure 32.
E56
40-60VDC
DC OUT
6A
FAULT
+
-
ON
OFF
Ground
-48 VDC Negative
Terminal
Terminal
Module
E55
2205
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