Telex RTS PS-20 Two and Four Channel Intercom Power Supply

The Telex RTS PS-20 is a professional wired intercom power supply providing two or four-channel operation for RTS intercom systems. Supports BP325 beltpacks and compatible user stations. Switchable between RTS two-channel mode, RTS four-channel mode, and Clear-Com compatible mode. Built-in monitoring speaker with front panel channel select and level controls. Two audio jack inputs allow two PS-20 units to be linked for expanded capacity. Increased power output of 1.8A per channel supports more user stations than the predecessor PS-31. 1U rack mount.

Universal AC input (100–240V) makes the PS-20 suitable for use worldwide.

Operating modes

• RTS 2-channel mode: XLR3 male output — Pin 1 common, Pin 2 30VDC + Channel 1 audio, Pin 3 30VDC + Channel 2 audio
• RTS 4-channel mode: XLR3 male output — Pin 1 common, Pin 2 30VDC + Channel 1 or 3 audio, Pin 3 Channel 2 or 4 audio
• Clear-Com mode: XLR3 male output — Pin 1 common, Pin 2 30VDC, Pin 3 Channel 1 or 2 audio

Technical specifications

• AC input: 100–240 VAC, 50–60 Hz (universal)
• Output voltage: 28–32 VDC (30 VDC nominal)
• Output current: 1.8A maximum per channel
• Termination impedance: selectable 200Ω
• Ripple: <0.2V
• Programme input level: nominal +2 dBu, balanced, high impedance >10kΩ
• Two-wire output: nominal 30 VDC, unbalanced, selectable 200Ω
• Monitor output: nominal 0 dB gain for 1000 mVRMS programme input, 30 VDC nominal, 100 mA maximum
• Audio link: nominal +2 dBu, 0 dB gain
• Programme input connector: XLR3F (Pin 1 common, Pin 2 balanced +, Pin 3 balanced −)
• Audio link connectors: ¼” stereo jack — input (Tip Ch1, Ring Ch2, Sleeve GND), output (Tip Ch3, Ring Ch4, Sleeve GND)
• Dimensions: 44 mm H × 207.9 mm W (1U rack)
• Weight: under 5 lbs
• Operating temperature: 0°C to +50°C
• Storage temperature: -40°C to +70°C
• Humidity: 0–95%, non-condensing
• Approvals: CE, UL, CSA, RoHS, WEEE
• Mounting: MCP style rack kit (included) or rubber adhesive feet

Part number: F01U391554 (391554).

Showcomms has supplied Telex RTS intercom equipment and spare parts for over 20 years. We stock genuine Telex parts and can advise on compatibility, system configuration, and sourcing components that are harder to find through standard channels. If you’re unsure whether this is the right part for your system, please get in touch before ordering.