Telex PS-20
Power Supply

Description

The RTS PS-20 is the new flagship of a complete independent TW power supply. The PS-20 features two- and four-channel operation, RTS monitoring, two-channel program input, audio linking, and three-mode operation: RTS 2-channel, RTS 4-channel and Clear-Com mode. It also has double the power output of the PS-31 per channel, which will increase the number of user stations and beltpacks which can be connected substantially.

The PS-20 features two channels of communication where both channels are "wet", meaning there is power on each channel (RTS two-channel mode). In RTS four-channel mode, the audio signals and DC exist on the same wire. The PS-20 can also be switched into Clear-Com mode. The PS-20 has a 3-pin XLR (male) connector on the front of the system, where a RTS user station can connect and monitor activity on either or both channels. A single PS-20 power supply has 1.8 ampere per channel which means the user can power up more stations (see specifications for details). If additional user stations or beltpacks are needed, two PS-20's can be joined together to double the power capability. A pair of standard stereo plug connectors are available on the back of the power supply to connect two PS-20's through audio linking as well . The PGM IN (3-pin XLR female Program Input) connector can be used to send audio to both CH 1 and/or CH 2.

Selectable Mode Operation
The PS-20 is selectable between RTS 2-channel, RTS 4-channel and Clear-Com mode.

Audio Linking
There is an audio link connection (1/4" (6.3mm) Stereo plug) on the back of the unit.

Monitoring
The 3-pin XLR Monitoring output connector on the front of the PS-20 allows the user to connect a RTS user station to monitor a channel or both channels.

Status Indicators
There is a green status indicator for each channel on the front of the unit. Each of these indicators will remain lit during normal operation, but will turn RED during a channel current overload condition. Output current is automatically reduced during an overload, and normal operation is restored when the overload is removed.

Program Input
There is a Program Input connector on the rear panel. This can be used to connect a device that both channel 1 and channel 2 can listen to at the same time. A Channel Select switch on the front panel assigns the program to either or both channels. A Level control adjusts the program level to the intercom channel.

Intercom Channels Connections
Intercom channels (user stations) are connected to the rear panel of the PS-20 with 3-pin XLR connectors.

Selectable Termination Impedance
The IMPEDANCE SELECT switch on the rear panel allows each channel to be set for 200ohm or 400ohm operation. Select 200ohm for each channel operated independently. Select 400ohm for each channel connected to another channel.

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