CIRCUTOR CEM-M-RS-485 - Manual (Page 10)

3.4.- CONNECTION DIAGRAM
The RS-485 cable must be made up of a twisted pair cable with a braided shield with a
maximum distance of 1,200 metres between the CEM M-RS485 and the master unit.
A maximum of 32 units can be connected to this bus.
Use an intelligent RS-232 to RS-485 network protocol converter to establish communications
with the master unit.
PC
B(-) A(+)
RS-485
CEM M-RS485
Alimentación
Power Supply
A(+) B(-)
RS-232 / USB / Ethernet / Profibus ...
RS-485
RS-485
RS-232
USB
Ethernet
Profibus
...
Figure 4: CEM M-RS485 connection diagram�
10
CEM M-RS485
Instruction Manual