Technical data

Chapter 4: Installation

SP40S Multi-Function Facility Communication System Manual, Revision L

4.4.9 Installing Ancillary Audio Input Connections

The SP40S panel has three ancillary audio inputs. Listed in order of priority, they are Night Ring (NR),

Telephone Page (TEL), and Background Music (BGM). These inputs do not operate when the SP40S panel is

in the alarm condition or when the input voltage (VAC) is not applied and the panel is on battery backup.

In addition, these inputs are not supervised.

The Telephone Page input requires input from a Telephone Page Port. The Night Ring input requires a dry

contact closure. The Background Music input requires a line level, 600 Ohm, 1Vrms signal.

1. Connect Telephone Page Input (TEL) to TB5. See Figure 4-1 for TB5’s location. Figure 4-7 is an

enlarged picture of the referred area.

2. Connect Night Ring Input (NR) to TB5.

Section 5

Night Ring, Telephone

Page, Background

Music Connections

Figure 4-7 Ancillary Audio Input Connections

NOTE: The Night Ring (NR) input requires a contact closure from the phone system to activate. The NR must

be connected to the phone line in the same room.

NOTE: When installed in New York City, the background music feature and telephone paging features are not

permissible.

3. Connect Background Music Input (BGM) to TB5.

WARNING: Excessive BGM voltage input can cause amplifier failure. Make

sure that the preferred audio source output for the BGM input of the SP40S panel

(CD player, tuner, equalizer, etc.) is a fixed line level voltage less than 2.5v peak to

peak or 300mv rms. Audio sources marked “line level output” are typically within

this limit. Audio sources with other than fixed line level outputs (that is, adjustable

speaker outputs, etc.) require that the audio source be adjusted using a multi-meter

across the output of the signal source (see below).

Once the level has been set properly, secure the adjustable audio source so that the

level cannot be inadvertently changed. Failure to set adjustable audio sources

appropriately or failure to secure audio adjustable sources can lead to failure of the

amplifier section of the SP40S Panel. This failure, in turn, could result in serious

injury or death to you and/or others.