-1-
2. Terminal Description
DIP
IN
IN
OUT
DS
123456
ON
123456
ON
2-Wire System
Bus-IN Bus-OUT
Bus Amplifier
Model: BDU
Tx/Rx
PA PB
NoRoute Amp-ON
INDICATORS BUTTONS
In-Use
CDV-BDU User Manual DT-ENG-BDU-V1 20150715
1.About the CDV-BDU Unit
Description:
The BDU unit is a bus amplier unit and system component designed for
the 2Easy 2-wire system. It has three work modes: Repeater mode,
Router mode and Gateway mode. Please see 'Working Mode' below for
full description.
DIP Setting:
Bit-1 to Bit-2 are used to set the BDU working mode.
Bit-3 to Bit-5 are used to set the address.
Bit-6 is used to set video end of line (EOL).
-2-
1 2 3 4 5 6
ON
Bit
Bit-1~Bit-2
Set to the Repeater mode.
Bit-6
Bit State Description
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Set to the Router mode.
Set to the Gateway mode.
Reserved.
Bit-3~Bit-5
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
DIP switch settings:
Set to the first BDU.
Set to the second BDU.
Set to the third BDU.
Set to the fourth BDU.
Set to the fifth BDU.
Set to the sixth BDU.
Set to the seventh BDU.
Set to the eighth BDU.
Set to ON for video end of line (EOL)
INDICATORS:
1. Bus-IN: Illuminated when connected to live bus.
2. Bus-OUT: Illuminated when connected to monitors.
3. Tx/Rx: Flashes when in communication.
4. In-Use: Off when in standby mode, illuminated when a call is in progress.
BUTTONS:
1.PA/PB: Video Amplier Gain adjustment.
2.NoRoute/Amp-ON: Debug button.
-3-
P C 6
B
Repeater Mode
P C 6
B
3. Working Mode Wiring.
Wiring diagram:
BUS(IM) BUS(DS)
PC6
AC~
BUS(IM) BUS(DS)
PC6
AC~
OUT DS
BDU
IN IN
1 2 3 4 5 6
ON
3.1 Repeater Mode (Line amplier): BDU can increase the distance
of the 2Easy system when set to repeater mode. As follows:
Max 140m from the rst door station to BDU
Max 140m from the last indoor monitor to BDU
CDV-BDU
-4-
B
P C 6
4 A
4 A
B P C 6
4 A
B P C 6
1 2 3
654
7 8 9
#0
*
3.2 Router Mode: In this mode, the system can connect up to 4
BDUs, and each BDU can connect up to 32 monitors giving
a total of 128 users.
CDV-BDU
-5-
Wiring diagram:
BUS(IM) BUS(DS)
PC6
AC~
1 2 3
654
7 8 9
#0
*
OUT DS
BDU
IN IN
BUS(IM) BUS(DS)
PC6
AC~
OUT DS
BDU
IN IN
BUS(IM) BUS(DS)
PC6
AC~
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
-6-
B
4 A
4 A
4 A
4 A
B
BPC6 PC6
1 2 3
654
7 8 9
#0
*
PC6
4A
DBC4A
3.3 Gateway Mode: In this mode, the rst door station can call all
the monitors and can connect up to 8 BDUs, and each BDU
can connect up to 32 monitors.
CDV-BDU
-7-
Wiring diagram:
BUS(IM) BUS(DS)
PC6
AC~
1 2 3
654
7 8 9
#0
*
OUT DS
BDU
IN IN
BUS(IM) BUS(DS)
PC6
AC~
OUT DS
BDU
IN IN
BUS(IM) BUS(DS)
PC6
AC~
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
4. Specification
•Power Supply : DC24V;
•Power consumption: Standby 13.5mA; Working 156mA;
•Working Temperature: -150C~+550C;
•Wiring: 2 wire,non-polarity;
•Dimension: 90(H)×72(W)×60(D)mm.
The design and specications can be changed without notice to the user. Right to interpret
and copyright of this manual are preserved.
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