Comtrol C53 - Manual (Page 6)

Operation 6
Operation
The C52/C53 supports four kinds of operations. They are:
• Point-to-point, 4-wire full duplex
• Point-to-point, 2-wire half duplex
• Multidrop, 4-wire full duplex
• Multidrop, 2-wire half duplex
Note: If possible, connect the GND of both sides together to gain better signals. For example, you may need one more GND connection in
addition to the 4-wire or 2-wire connections.
Note: For C53, connect the GND at the terminal block to the earth ground to provide a ground path to prevent electric shock caused by
lightning, no matter whether you use the RJ45 or terminal block RS-422/RS-485.
Basic Communication Wiring
Before placing a converter in an existing network, you should configure it. The following diagrams show a typical layout for both
converters.
Power
Power GND
RS-422/485
RS-422/485
RS-232 PC
Power
TxD(2)
RxD(3)
RTS(4)
CTS(5)
DSR(6)
GND(7)
DCD(8)
DTR(20)
RxD(2) TxD+(B))
TxD(3) TxD-(A)
CTS(4) RxD+(B)
RTS(5) RxD-(A)
DTR(6) GND
GND(7)
DCD(8)
DSR(20)
RxD+(B)
TxD+(B)
TxD-(A)
GND
RxD-(A)
RS-232
Host D 25 Female
Connector
B A52/53 Converter
RS-422 Devices
TxD(2)
RxD(3)
RTS(4)
CTS(5)
DSR(6)
GND(7)
DCD(8)
DTR(20)
RxD(2) Data+(B))
TxD(3) Data-(A)
CTS(4) GND
RTS(5)
DTR(6)
GND(7)
DCD(8)
DSR(20)
Data+(B)
Data
GND
-(A)
RS-232 RS-485
Host D 25 Female
Connector
B A52/53 Converter
RS-485 Devices