Andover Controls CONTINUUM - Converting PS 120;240 AC 50-U and AC 85-U Into an Auxiliary Supply

16 Andover Controls Corporation
Converting PS 120/240 AC 50-U and AC 85-U Into an Auxiliary Supply
The UPS versions of the 120/240 AC power supply include two status signals that
are meant for use by a CPU module. When connecting directly to an I/O module you
want to eliminate these signals.
There are two versions of the printed circuit board within the Power Supply.
One includes a mode switch, the other requires components to be removed.
On newer versions of the supply, a Mode switch inside the cover allows you to easily
disable these signals. In order to access these components you must remove the
plastic cover from the case.
1 Remove power from the unit.
2 Press both cover removal tabs inward simultaneously and pull up:
3 Locate the Mode switch using the diagram below:
4 With the tip of a small screwdriver, carefully slide the switch to the AUX
position. To reverse this change, simply slide the switch back to the CPU
position.
5 Replace the cover.
I/O
AUX
Mode Switch:
CPU (UPS)
I/O
AUX
CPU (UPS)
I/O
AUX
CPU (UPS)
NORMAL
OPERATION
AUXILIARY
OPERATION
Press These Tabs
Pull Cover Upward
with Tabs Depressed
J2
J3