MULTI-CHANNEL REMOTE STATIONS MAINTAIN THE POWER LINE ISOLATION: The RM-220,
KB-211, and MR-202 as well as any two-channel remote stations or beltpacks are designed to use
the isolated power provided by the PS-232. Refer to the
INSTALLATION
section.
LOW NOISE CIRCUITRY: The direct current outputs of the PS-232 contain very little hum and
noise. The PS-232 does not contribute to audible noise in the remote stations and beltpacks.
FRONT AND REAR PANELS
A description of the connectors and controls follows. Refer to Figure 1.
Figure 1
Front Panel
1
POWER SWITCH: Turns the AC power to the PS-232 on and off. The green Power light will
illuminate when the power is ON.
2 OVERLOAD INDICATORS: If a short circuit or overload condition appears on either of the
intercom channel outputs, the red Overload light for that channel will illuminate. If this
condition persists, the microprocessor will disconnect power to that channel and the red
Overload light will blink. If a red Overload light is blinking, the fault on that channel must be
located and removed. When the fault is removed, the PS-232 will restore power to that
channel and the Overload light will go out . If there are no shorts, but the Overload light blinks,
an overload exists, possibly due to too many intercom stations connected on that intercom line.
If the failure continues, unplug the intercom line connected to the affected channel. Its red
Overload light should go out. This indicates a short in that line. Follow that intercom line
connecting and disconnecting cables along the line until the fault is isolated.
3
PROGRAM SEND ON/OFF: These toggle switches, one for each channel, connect program
audio to each channel. Both channels receive the same signal from the rear panel PROGRAM
INPUT. The number of active sends will not affect the overall send level to any channel.
4
PROGRAM SEND LEVEL: These controls (one for each channel) adjust the level of program
heard in that channel. The PROGRAM switch must be ON for the control to function on that
channel. (The level controls work in conjunction with the PROGRAM TRIM (8) level control on
the rear panel.) For a higher program level, turn the control clockwise. For less program level
turn the control counter-clockwise. If the control is all the way up on a channel and the program
2
4
3
7
5
6
1
8
10
9
11
12
Clear-Com PS-232 Power Supply
4
