PAGE 5
User Manual BS 287 / May 2013 © ASL Intercom BV
6.0
REAR PANEL CONTROLS & CONNECTORS
4
A & B LINE connectors
These XLR-3 type connectors are for connecting
remote stations, using standard microphone
cable. There are 2 connectors for channel A and
2 connectors for channel B.
Pin assignments:
Pin 1: 0V / ground shield
Pin 2: +30V DC power wire
Pin 3: audio wire
5
AUX INPUT con GND lift
This XLR-3 input is electronically balanced and
accepts line level audio signals. Ground can be
lifted.
Pin assignments :
Pin 1. 0V / ground
Pin 2:
Pin 3: signal –
6
FUSE Holder
The fuse protects the BS 286 against severe
internal damage, in case of malfunction in the
power section.
Before replacing a fuse the
mains cord must be disconnected from the
mains outlet.
7
MAINS Inlet
IEC Mains connector
7.0
TECHNICAL SPECIFICATIONS
System
Dynamic range: 80 dB (1kHz, THD <1%)
Frequency response: 200 Hz – 15 kHz (-3 dB)
Call signal (send): +2.8 mA
Call signal threshold (receive): +2.4 V DC
Operating voltage: 24 - 32 V DC
Intercom line
Impedance: 350 Ω (1 kHz), 2.2 kΩ (DC)
Audio level: nom. -18 dBu, max. 0 dBu
Switch Mode Power Supply
Mains voltage: 100 - 240 V AC, 50/60 Hz
Output voltage: +30 V DC (+/- 5%)
Max output power: 45 W
Max power consumption: 60 watts
Aux Input
Input Impedance: 33 k
Ω
Nominal Input Level: 0 dBu
Max. Input Level: +22 dBu
BS 287 Dimensions & Weight
Width: 19” (483 mm) / Height: 1RU (44.5 mm)
Depth: 140 mm / Weight: 1.5 Kg
0 dBu defined as 775 mV rms into open circuit.
ASL reserves the right to alter specifications without prior notice
