User's Manual

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5.5 RS-232 Connector
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RS-232 / RS-485 / J1708 Connector
Pin Signal Pin Signal
1 RS-232 DCD 2 RS-232 RXD
3 RS-232 TXD 4 RS-232 DTR
5
RS-232 Ground 6 RS-232 DSR
7
RS-232 RTS 8 RS-232 CTS
9
RS-232 RI / +5V / +V12
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5.6 RS-232 / RS-485 / J1708 Connector
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RS-232 / RS-485 / J1708 Connector
Pin Signal Pin Signal
1 RS-232 RTS9 2 RS-232 RXD9
3 RS-232 TXD9 4 RS-232 CTS9
5
RS-232 Ground 6 RS-485 D-
7
RS-485 D+ 8 J1708 D-
9
J1708 D+
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TREK-550 User Manual  22
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