then a jumper should be connected between the REM and +12V terminals. Otherwise, turning the front panel key switch to the REM position will turn the PS-PRO ON.
REMOTE CONTROL
When the PS-PRO’s front panel key lock switch is in the REM position, it may be controlled by one or more switches in remote locations. In the most basic configuration, only two wires and an SPST switch are needed to initiate an ON or OFF sequence. The switch may be either a momentary or a maintained- contact type, depending on a jumper setting inside the PS-PRO. If an additional wire is used, an LED may also be installed at the remote end to indicate that the power is on.
MOMENTARY vs. MAINTAINED CONTACT SWITCHING
An on-off switch of either kind may be used to actuate the PS-PRO’s remote operation. Maintained switches, such as most toggle switches and push-on/push-off button switches, (including the Furman RS-1 key lock switch), stay open until switched, and then remain closed until switched again. Momentary switches, usually pushbutton types like the Furman RS-2 (which also provides a locking key switch), are normally open and stay closed only as long as the button is pressed.
Maintained switches are generally the most convenient when there is only one remote location. When more than one location is required, momentary switches offer the advantage of a turn- on or turn-off sequence which may be started from any location.
The PS-PRO main circuit board has 5 pairs of terminals (PCB REV D and later) labeled as:
JMP1 (Default) (MAINT ON) , when the REM and +12V terminals are tied together, the PS-PRO will sequence OFF.
terminals are momentary tied together, the PS-PRO will sequence ON or OFF.
JMP3 (MAINT OFF), when the REM and +12V terminals are tied together, the PS-PRO will sequence ON.
JMP4 (REM TO GND = ON), when the REM and GND terminals are tied together, the PS-PRO will sequence ON (Note: JMP1 must have a jumper installed).
JMP5 spare jumper holder.
PS-PRO units come factory-set for maintained operation (jumper is installed on JMP1). They may be easily converted to other operating modes by moving jumper plug/plugs on the PS-PRO’s circuit board. To do this, first disconnect the unit from AC power. Remove the six screws that secure the top cover and one screw from the front panel. Just install the jumper plugs to the desired mode of operation. Reattach the top cover.
MAINTAINED MODE
There are 3 maintained modes of operation:
REM to +12V = OFF (jumper plug installed on JMP1, MAINT ON)
MAINTAINED MODE (continued)
(continued on page 7)
