system maximum to be exceeded. A channels which is within its maximum current rating will not be af-
fected by the other channel being automatically cutoff.
Depending upon how many shorts or overloads a channel has experienced recently, the PS-232 will at-
tempt to turn power on again within 500 mS to 20 seconds of automatically cutting off power to an over-
loaded channel. This allows momentary short or overload conditions to clear automatically. If the
PS-232 cuts power off to one or both channels, it will indicate which channel is affected by blinking the
red overload LEDs corresponding to these channel(s). This indication will assist in locating the shorted
or overloaded channel. Shorts are generally caused by miswiring or damaged cables. Overloads are
generally caused by connecting too many beltpacks and stations to a channel.
The current requirements of Clear-Com remote stations and beltpacks vary with model and use. A sta-
tion that is simply '"on" and idling in the circuit may draw only a small amount of current. The PS-232
will power up to 50 Beltpacks, 15 Speaker Stations, or a mix of the two. Refer to the following chart to
determine how many of each can be powered in varying combinations. Contact your dealer or Clear-
Com if you require further assistance in determining the overall current requirements of your system.
INSTALLATION
Intercom Line Connection
The PS-232 provides three rear panel 3-pin male XLR connectors for each intercom line. These con-
nectors are wired in parallel and intended for loop-through connection. Any single-channel station or
channel of a multi-channel station connected on a line plugged into Channel A of the PS-232 will be
"party-lined" with all the other stations on that same channel. In a multi-channel system, the goal is to
assign specific people to the correct group, i.e. the other people whom they need to be in contact with
the most. This is particularly important when the party line users are on a single-channel beltpack or
station; less so if they are on multi-channel stations. The pinout of the intercom connectors is as
follows:
Pin 1 --- Ground (Shield)
Pin 2 --- Power (+30 VDC)
Pin 3 --- Audio
Line Termination (Rear Panel)
Switching of the channels' terminations ON and OFF are done with the rear-panel toggle switches. In
most systems, all terminations on the PS-232 should be in the ON position (default setting). The funda-
mental concept of Clear-Com Party-Line intercom is that all channels are terminated in one location,
preferably at the power supply.
Clear-Com PS-232 Power Supply
6
Overload
Acceptable
Number of Beltpacks
Number of
Speaker
Stations
5
10
15
5
10
15
20
25
30
35
40
