6
ã
Bittner-Audio
BITTNER Installation & Operations Manual
RS485 is a multi-point communications network with up to 32 drivers and 32 receivers on
a single (2-wire) bus and are able to withstand "data collisions" (bus contention)
problems and bus fault conditions. RS485 extends the common mode range for both
drivers and receivers in the so-called "tri-state" mode.
RS-485 Connector Pinout:
The RS-485 interface on the XR Series amplifiers is a half-duplex transceiver with one
single bus (2-wire) for transmitting and receiving data on the same bus.
RS485 PORT connector (RJ45):
Pin
1
RS485GND
2
NC
3
DATA+
4
DATA-
5
DATA-
6
DATA+
7
NC
8
RS485GND
Pin 3 and 6 and pin 4 and 5 carry the same signal.
Note: DATA+ is pulled via 10k resistor to +5V volts and DATA- is pushed to RS485GND
via 10k in idle state.
RS-485 Indicators
Two LED indicators are active while receiving data (red=RX) and transmitting data
(green=TX) over RS485.
RS-485 Address
In the RS-485 control mode the amplifier is identified by its address. Use the DIP
SWITCH ADDRESS 1-6 settings to set the RS-485 node address from 01 to 64:
Example:
Address 00:
ON,ON,ON,ON,ON,ON
Address 01:
OFF,ON,ON,ON,ON,ON
The amplifier must be re-powered before the address change is activated !
For further information to connect the DSP control software, refer to the chapter ‘DSP
Control over RS-485’.
P
OWER
S
WITCHING
/
R
EMOTE
O
N
/O
FF
-S
WITCHING
There are three options to switch the amplifier on and off.
Option 1 – Manual Switching:
The amplifier can be switched on manually by switch placed on back panel. When
amplifier is switched on manually, it can't be switched on/off remotely. Manual switch
overrides remote switch control. To switch the amplifier remotely, the manual switch must
be in OFF position.
Option 2 – Remote Switching with 12VDC-Control Voltage:
The PHOENIX terminal block is used for remote switching with a control voltage (12VDC). Terminal 1 and 2
are used as the control voltage input. Supplying the control voltage to these terminals will switch the amplifier
ON. After a delay of one second internally the terminals 4 and 5 of the PHOENIX terminal block will be fed
