8�- Rs-485 Communications; 8�1�- Connections - Circutor CVM-C11 Instruction Manual

CVM-C11
8.- RS-485 COMMUNICATIONS
The CVM-C11 devices have one RS-485 communications port.
The device has as standard two communications protocols: MODBUS RTU ® and BACnet.
The protocol and configuration parameters are selected in the setup menu. (
).
CATIONS: PROTOCOL"
8�1�- CONNECTIONS
The RS -485 cable must be wired with twisted pair cable with mesh shield, with a maximum distance
between the CVM-C11 and the master device of
be connected to this bus.
Use an intelligent RS-232 to RS-485 network protocol converter to establish the communications with
the master device.
Instruction Manual
RS-232
USB
Ethernet
Profibus
...
A(+)
B(-)
POWER SUPPLY OUTPUTS INPUTS RS-485
A1(+) A2(-) R0 R01 R02 D0 D01 D02 DI DI1 DI2 A(+) B(-)
C C C
P1 P2 P1 P2 P1 P2 P1 P2
IL2 IL3 IN
IL1
U U U N
L1 L2 L3 S1 S2 S1 S2 S1 S2 S1 S2
Figure 40: RS-485 Connection diagram�
metres. A maximum of 32 CVM-C11 devices can
1200
PC
RS-232 / USB / Ethernet / Profibus ...
RS-485
RS-485
POWER SUPPLY OUTPUTS
A1(+) A2(-) R0 R01 R02 D0 D01 D02
C C
P1 P2 P1
IL1
U U U N
L1 L2 L3 S1 S2 S1
"6.31. RS-485 COMMUNI-
INPUTS RS-485
DI DI1 DI2 A(+) B(-)
C
P2 P1 P2 P1 P2
IL2 IL3 IN
S2 S1 S2 S1 S2
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