Table 4-3 Com3 And Com4 Connector Pin-Outs (J17 Connector); Table 4-4 Com3 And Com4 Rs-422/485 Connector Pin-Outs; Table 4-5 Com3/4 Switches, Switch 2 - Octagon Systems XE–700 Reference Manual

Table 4–3 COM3 and COM4 connector pin-outs (J17 connector)
COM3
Pin# RS–232
signal
1 nc
2 nc
3 RxD
4 RTS
5 TxD
6 CTS
7 nc
8 nc
9 GND
10 nc
Table 4–4 COM3 and COM4 RS–422/485 connector pin-outs
J15 COM3
connector
Pin # Signal
1 TXD+
2 TXD–
3 GND
4 RXD+
5 RXD–
Table 4–5 COM3/4 switches, Switch 2
COM Port
COM3
COM4
* Default. These switches terminate the network. If
the XE–700 SBC is not at an end of the network, set
these switches to Off .
COM4
Pin# RS–232
signal
11 nc
12 nc
13 RxD
14 RTS
15 TxD
16 CTS
17 nc
18 nc
19 GND
20 nc
J14 COM4
connector
Pin # Signal
1 TXD+
2 TXD–
3 GND
4 RXD+
5 RXD–
Switch 2 – COM3/4 termination
Interface Switch 4 Settings
RS–422/RS–485 Position 1 Off
no termination Position 2 Off
RS–422/RS–485 Position 1 On*
with termination Position 2 On*
RS–422/RS–485 Position 3 Off
no termination Position 4 Off
RS–422/RS–485 Position 3 On*
with termination Position 4 On*
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