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26 en | Connection Instructions
6.3.2
RS-485 4-Wire/RS-422 Interface
Figure 6.6 shows the circuit diagram of an RS-485 4-wire inter-
face.
Fig. 6.6 RS-485 4-wire connection scheme
The pin assignment are identical between RS-422 and RS-485 4-
wire. RS-422 only supports point-to-point connections, while
RS-485 4-wire also supports bus systems.
Signal
Receive data (+)
Receive data (-)
Transmission data (+)
Tansmission data (-)
Balance circuit
Ground
Tab. 6.5
F.01U.012.855 | V.3 | 2006.08
Identifier/PIN
RT+
RT-
T+
T-
PAG
RS-485 4-Wire Interface Pin Assignments
Installation manual
AMC MUX and AMC MUX-EXT
Bosch Security Systems
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