Alpha Technologies VMX Series - Manual (Page 27)

27 017-940-B0-001, Rev. A
4.0 Confi guration, continued
4.2 AC Output Voltage Reconfi guration
Tools Required: Small fl at-blade torque screwdriver
The output voltage on VMX Power Supplies can be easily reconfi gured by moving the Output
Tap jumper to 63 or 48Vac, or 63 or 87Vac, depending on the VMX model.
Output Voltage Reconfi guration Procedure:
1. Unplug the Line cord. Turn off the battery breaker and unplug the battery connector on
the front of the unit.
2. Loosen the Tap Select wire screw on the terminal block. Move the Tap Select wire to the
87V, 63V, or 48V output voltage position, as desired.
Fig. 4-2, Transformer Output Tap Connectors
Output voltage reconfi guration must only be performed by qualifi ed personnel.
ATTENTION:
Before proceeding, make certain all power has been removed from the power supply by
unplugging the power supply from the AC power source, front panel connections, and
disconnecting the battery connector. Failure to do so could expose the technician to
potentially lethal voltages.
WARNING!
3. Re-tighten the Tap Select wire screw and torque to 0.8 Nm (7.0 in-lbs).
4. Reconnect the front panel connections. Turn on the battery breaker, and plug in the line
cord. Verify operation of the power supply.
CAUTION!
Do not jumper the 87V terminal, 63V terminal, or 48V terminal together.