TELEX SPS-2000 (01) PDF MANUAL

The TELEX SPS-2000 is a two-channel intercom power supply with a built-in speaker, occupying a 1/2-rack space. It provides power to two channels for US-2000 User Stations and includes a two-input powered speaker. The unit features internal switches and jumpers that allow it to be configured for use with Audiocom™ or Clear-Com® components and to meet specific operator requirements.

Use the front panel “Volume” control to simultaneously adjust the speaker level for both speaker input lines.

The indicators are green during normal operation. They will change to red if there is a short circuit or an overload condition on a power output line.

If an indicator turns red, you must either disconnect the corresponding channel connector or turn off the intercom system. Locate and fix the problem before resuming operation. After the problem is resolved, you will need to press the “Reset” button.

The power status indicators will stay red after a problem is detected until power is removed or the “Reset” button is pressed. Press the “Reset” button after the problem has been resolved or the affected channel connector has been disconnected.

These RCA jacks can be connected to the SPEAKER outputs of a US-2000 or ES-4000 station. They can also be used to connect audio input from another line-level program source, such as an auxiliary output from a radio or tape player.

These XLR-3M connectors carry power to intercom user stations and also provide channel termination for the audio signal.

To access the internal switches and jumpers, you need to remove one screw from the top cover and two screws from each side of the unit.

You can configure the system using the internal Balanced/Unbalanced Switch (S200).

For Audiocom™ systems: Set the switch to the balanced (BAL) position to use the US-2000 with Audiocom intercom channels. This is the factory default setting.

For Clear-Com® systems: Set the switch to the unbalanced (UNBAL) position.

The TELEX SPS-2000 has internal jumpers that affect its operation, particularly for line termination. The settings are as follows:

*Note: Only one set of jumpers (either W102 through W402, or W101 through W401) should be in the “pins 2&3 shorted” position at any time.

Speaker Inputs

Type: RCA Phone Jack

Tip: Speaker output high

Sleeve: Common

Intercom Channel Connectors

Type: XLR-3M

Audiocom Mode (Internal switch S200 set to BAL position)

Pin 1: Common

Pin 2: +24 VDC output and audio termination

Pin 3: +24 VDC output and audio termination

Clear-Com Mode (Internal switch S200 set to UNBAL position)

Pin 1: Common

Pin 2: +24 VDC output and audio termination

Pin 3: Audio termination

Output Voltage: 24 ±1 VDC

Output Current: 2A at 21 ±1 VDC

Output Impedance: 150Ω ±5%, unbalanced; 300Ω ±10%, balanced

Input Power Requirements: 92 to 255 VAC, 50 to 400 Hz

Environmental Requirements: 0°C to 50°C; 0% to 95% humidity, non-condensing

Dimensions: 1.75″ (44.5 mm) H x 8.25″ (209.5 mm) W x 10.25″ (260.4 mm) D

Weight: 2.5 pounds (1.13 kg)

Frequency Response: 100 Hz to 20 kHz +1/-4 dB, at 0 dB output

Maximum Voltage Gain: 18 +3/-2 dB

Speaker Impedance: 8Ω nominal

Input Level: 1.0 Vrms

Output Amplifier Power: 4W maximum into 8Ω

Output Voltage Level: 16 ±1 Vp-p, before clipping