Alpha Technologies CFR Redundant Control Unit - Manual (Page 15)

13
3 Operation
3.2 RCU Voltage Configuration
Figure 3.6
Input 1 and 2 Pin Jumpers on the Power Board
Input 1 Pin Jumpers Input 2 Pin Jumpers
R 10
120 V 120 V
R 9
R 8
R 1
R 2
R 3 R 4
R 5
R 6
R 7
208 V
or
240 V
208 V
or
240 V
R 11
R 12
F 2 F 1
1 1 2 2 3 3 4 4 5 5
J 1 J 2
12
3
4567
8
J 3
NOTE: The Input 1 and 2 voltages must be configured identically.
DANGER: This procedure should be done only by qualified personnel.
DANGER: Verify the power is OFF before opening the front panel.
The RCU is designed so it is voltage configurable for 120/208/240 VAC.
PROCEDURE:
Switch the Input 1 and 2 circuit breakers OFF.
Remove the two Phillips screws on the sides of the front panel.
Carefully lower the panel 45 degrees.
Locate the Input 1 and 2 pin jumpers on the power board.
1
2
4
3