ASL INTERCOM BS 216 Quick Manual page 4

7.0 REAR PANEL CONTROLS & CONNECTORS
10 MAINS Inlet
IEC Mains connector
11 FUSE Holder
The fuse protects the BS 216 against severe
internal damage, in case of malfunction in the
power section.
12 AUX INPUT connector
This aux signal input is electronically balanced
and accepts mic or line level audio signals.
Pin assignment :
Pin 1. 0V / ground
Pin 2: signal +
Pin 3: signal –
8.0 INTERNAL CONTROLS
MIC GAIN. The headset mic gain is adjusted by a trimmer located on the PCB near the headset connectors
.
9.0 TECHNICAL SPECIFICATIONS
Intercom 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
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
Mic Pre-amp
Gain: 40 - 60 dB (adjustable internally)
Presence filter: +6dB @ 5 kHz
Power to electret mic: +9 V DC
ASL reserves the right to alter specifications without prior notice
For safety instructions, block diagram, system configuration and party line concept & cabling, see
the BS 216 User Manual. Go to www.asl-inter.com, section 'Support'
0 dBu is defined as 775 mV rms into open circuit.
PAGE 4
Quick Guide 216 / Issue October 2013 © ASL Intercom BV
13 INPUT LEVEL Switch
To select mic or line level audio. If mic level is
selected, +30 V DC phantom power is supplied to
pin 2 and 3 of the aux input connector
14 MIC GAIN Trimmer
To adjust the input gain when mic level is
selected (see #13)
15 A & B LINE connectors (XLR-3)
To connect remote stations to the BS 216, using
standard microphone cable. Pin assignment:
Pin 1: 0V / ground shield
Pin 2: +30V DC power wire
Pin 3: audio wire
Headphone Driver Amp
Max. output level: 11.6 Vrms (at 200 Ω)
Max. output power: 0.7 Wrms (at 200 Ω)
Side Tone Rejection: 0 - 30 dB adjustable
Buzzer Max. SPL: 85 dBA
Aux Input
Input Impedance:
30 kΩ (line level)
4.6 kΩ (mic level)
Nominal Input Level:
0 dBu (line level)
-30 dBu (mic level)
Max. Input Level:
+22 dBu (line level)
0 dBu (mic level)
Phantom Power: +30 V DC (mic level selected)