Comtrol C53 - Manual (Page 9)

RS-232 Cable Wiring 9
Type 2: To connect the RS-232 side of a C52 or C53 to a DTE (Data Terminal Equipment or “your PC”) with a 3-pin wiring if you don’t
require hardware flow control.
C52/C53 to DTE Cable
Signal Pin Pin Signal
TxD 5 3 RxD
RxD 6 2 TxD
GND 7 7 GND
RTS 8 5 CTS
CTS 3 4 RTS
DSR 9 20 DTR
DTR 2 6 DSR
DCD 1 8 DCD
RJ45 DB-25
Male
C52/C53 to DTE Cable
Signal Pin Pin Signal
TxD 6 2 RxD
RxD 5 3 TxD
GND 7 5 GND
RTS 8 8 CTS
CTS 3 7 RTS
DSR 9 4 DTR
DTR 2 6 DSR
DCD 1 1 DCD
DB-9
Male
RJ45
C52/C53 to DCE Cable
Signal Pin Pin Signal
TxD 6 2 RxD
RxD 5 3 TxD
GND 7 7 GND
RTS 8 4 CTS
CTS 3 5 RTS
DSR 9 6 DTR
DTR 2 20 DSR
DCD 1 8 DCD
RJ45 DB-25
Female