Circutor CVM-C5 Series - 4�7�- Communications; 4�7�1� Connections

4�7�- COMMUNICATIONS
TheCVM-C5haveoneRS-485communicationsport,withMODBUS RTU ®protocol�
4�7�1� CONNECTIONS
TheRS-485cablemustbewiredwithtwistedpaircablewithmeshshield(minimum3wires),
withamaximumdistancebetweentheCVM-C5andthemasterunitof1200metres�
Amaximumof32CVM-C5unitscanbeconnectedtothisbus�
UseanintelligentRS-232toRS-485networkprotocolconvertertoestablishthe
communicationswiththemasterunit�
B(-)A(+)
A(+) B(-)
S
S
RS-232 / USB / Ethernet / Profibus ...
PC
RS-485
RS-485
RS-232
USB
Ethernet
Profibus
...
POWER SUPPLY
S0+ S0-
OUTPUT
S1 S2 S1 S2 S1 S2
L1
P1 P2
L2 L3
300V ~
Ph-NPh-Ph
520V
~
NV
L3L2
V
L1
V
P1 P2 P1 P2
RS485
A
(+)
B
(-)
GND
Figure 16: RS-485 Connection diagram�
42
CVM-C5-xxx-485
Instruction Manual