3. Cabling
3-20
TI 33Q01J10-01E
Power Wiring When Connecting Dual Power Supply Lines
When installing an AND50 to an ACB21 I/O expansion cabinet, abide by the following:
1. Do not connect the shield wire of either power supply cable to the power distribution board
in the ACB21. Cut off the shields at the ends of the insulation for both cables.
2. Connect the conductors of each power supply cable to the L and N terminals on the power
distribution board in the ACB21.
3. For power wiring to the AND50 (dual power connection model), connect the L and N
terminals on power distribution board to the L and N terminals of the AND50, respectively,
as shown in the figure below. Connect the G terminals of the AND50 to the grounding bar of
the cabinet.
4. For the grounding of an entire cabinet, connect the grounding bar of the cabinet to the
dedicated grounding bus or pole at a grounding resistance of 100 ohms or less.
AND50
100 ohms or less
Grounding bar
Power cables
ACB21
L N
L N
L G
N
L G
N
F030419.ai
Figure Power Wiring When Connecting Dual Power Supply Lines
Nov. 20, 2003-00
