CARR-POW (Carrier Port Power Unit) for AC-Powered
Systems
Issue 4 May 2002
10-369 555-233-123
4. Before installing the replacement power unit in the carrier, turn the power
unit on its side and operate rocker switches 1 through 4 on the dip switch
as follows:
NOTE:
In the open position, the rocker is down on the side opposite the
number. In the closed position, the rocker is down on the side
adjacent to the number.
5. Move the locking slide on the replacement power unit to the extreme left
position and open the locking lever.
6. Insert the power unit into the carrier until some resistance is felt.
7. Lift the locking lever upward until it latches.
8. Move the locking lever slide on the power unit to the extreme right position.
9. Connect the power cord and set the power switch to ON.
Replacing a 631DA or 631DB AC Power Unit
If the power unit to be replaced is in a control carrier of a PPN system, refer to
“Removing Power” and “Restoring Power” in Chapter 5, “Routine Maintenance
Procedures” before replacing the power unit. To replace the power unit, follow the
procedure below:
1. Unplug the power cord.
2. Move the locking slide on the power unit to the extreme left position and
unlatch the locking lever.
3. Remove the power unit from the carrier.
4. Move the locking slide on the replacement power unit to the extreme left
position and open the locking lever.
5. Insert the power unit into the carrier until some resistance is felt.
6. Lift the locking lever upward until it latches.
7. Move the locking lever slide on the power unit to the extreme right position.
8. Connect the power cord and set the power switch to ON.
Switch 631AR Position 631BR Position
1 open open
2closed closed
3 open open
4 closed open
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