bel Digital Audio 2120B, User Manual, Page: 15 / 34

BEL DIGITAL AUDIO Bel2120B

2004 BEL Digital Audio Ltd.
15
RS422 Serial control
The BEL 2120 can be externally/ remotely controlled via the 9 pin RS422
socket on the rear panel. Units can be connected in cascade by linking the RS422
output connector of one unit to the RS422 input connector of the next. The RS422
signal is buffered by each unit and electro-mechanically bypassed during power
down. When a recognized RS422 data word is received the BEL 2120B front panel
will be locked out to avoid confusion.
Rear Panel Connectors
From the left these are:
Analogue inputs (upper) 15 way D female
Analogue outputs (lower) 15 way D female
SDI input BNC 75ž
SDI output BNC 75ž
AES I/O 15 way D female
RS422 in serial Port 9 Pin D female
RS422 out serial Port 9 Pin D female
Mains power 230/115VAC IEC 3 Pin
A mains switch and fuseholder (230V - 250mA, 115V -
500mA)
Pin Connections
Audio inputs
Pin1 Ch1 + Pin 9 GND
Pin 2 Ch1 - Pin 10 GND
Pin 3 Ch2 + Pin 11 GND
Pin 4 Ch2 - Pin 12 GND
Pin 5 Ch3 + Pin 13 GND
Pin 6 Ch3 - Pin 14 GND
Pin 7 Ch4 + Pin 15 GND
Pin 8 Ch4 -
Audio outputs
Pin1 Ch1 + Pin 9 GND
Pin 2 Ch1 - Pin 10 GND
Pin 3 Ch2 + Pin 11 GND
Pin 4 Ch2 - Pin 12 GND
Pin 5 Ch3 + Pin 13 GND
Pin 6 Ch3 - Pin 14 GND
Pin 7 Ch4 + Pin 15 GND
Pin 8 Ch4 -