Appendix H: Serial Port Wiring - NetComm NWL-15 User Manual

Appendix H: Serial port wiring

The NWL-15 router has a serial interface and acts as the data communications equipment (DCE). The wiring tables below indicate
the DCE and DTE devices as well as the signal direction. Shielding cable can optionally be soldered to the chassis and connected
to ground.
DTE DEVICE (COMPUTER)
PIN NAME
1 DCD
2 RXD
3 TXD
4 DTR Data Terminal Ready
5 GND
6 DSR
7 RTS
8 CTS
9 RI
- FGND Shield (Soldered to D9 metal shield)
NetComm Wireless Light Industrial M2M Router Plus
128
Pin 1
Pin 6
Figure 136 - DE9 Male connector (Pin side view)
DESCRIPTION
Data carrier detect
Receive Data
Transmit Data
Ground
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
Table 34 - RS-232 Wiring
RS-485 HALF DUPLEX WIRING
PIN SIGNAL
1 —
2 +
5
Table 35 - RS-485 Half Duplex Wiring
RS-485 (RS-422) FULL DUPLEX WIRING
PIN SIGNAL NAME
1 — RXA
2 + RXB
3 + TXB
4 — TXA
5 GND
Table 36 - RS-485 (RS-422) Full Duplex Wiring
DCE DEVICE (NWL-15 ROUTER)
SIGNAL
DIRECTION
DESCRIPTION
Data carrier detect
Receive Data
Transmit Data
Data Terminal Ready
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
Shield (Soldered to D9 metal shield)
NAME DESCRIPTION
A Differential pair A
B Differential pair B
GND Ground
DESCRIPTION
Receive (Differential pair A)
Receive (Differential pair B)
Transmit (Differential pair B)
Transmit (Differential pair A)
Ground
Pin 5
Pin 9
NAME
DCD
RXD
TXD
DTR
Ground GND
DSR
RTS
CTS
RI
FGND
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PIN
1
2
3
4
5
6
7
8
9
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