Circutor CVM-C10 - COMMUNICATIONS; CONNECTIONS

4.10.- COMMUNICATIONS
The CVM-C10 devices have one RS-485 communications port.
The device has as standard two communications protocols: MODBUS RTU ® and BACnet.
The protocol and conguration parameters are selected in the setup menu. (
“4.9.29. RS-485
communications: Protocol”
)
Note: BACnet protocol available in devices with version 3.00 or higher.
4.10.1. 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-C10 and the master device of 1200 metres.
A maximum of 32 CVM-C10 devices can be connected to this bus.
Use an intelligent RS-232 to RS-485 network protocol converter to establish the
communications with the master device.
B ( - )
A ( + )
S
POWER SUPPLY
INPUTS
A(+) B(-)
GND
RS485
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
I1 I2
OUTPUTS
Rc R2 R1 Tc T2 T1
S0- S0+ S0 +
POWER SUPPLY
INPUTS
A(+) B(-)
GND
RS485
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
I1 I2
OUTPUTS
Rc R2 R1 Tc T2 T1
S0- S0+ S0 +
RS-232 / USB / Ethernet / Profibus ...
PC
RS-485
RS-485
RS-232
USB
Ethernet
Profibus
...
Figure 33: RS-485 Connection diagram.
72
CVM-C10
Instruction Manual