Wavetronix SmartSensor Advance Extended Range (SS-200E) - Use Manual de usuario Pagina 143

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142 APPENDIX
Length Cable Comm. Channel 1 Comm. Channel 2
0–200 ft. (0–61 m) SmartSensor Cable
(9-conductor)
Native RS-485 Native RS-232
200–1000 ft.
(61–304.8 m)
SmartSensor Cable
(9-conductor)
Native RS-485 Click Conversion of
RS-232 to RS-485
1000–1400 ft.
(304.8–426.7 m)
SmartSensor Cable
(9-conductor)
Native RS-485 NA
1400–2000 ft.
(426.7–609.6 m)
Alternate power and
communications cable
Native RS-485 Click Conversion of
RS-485 to RS-232
Table B.6 – Summary of SS200 standard cable length options
Appendix C – Direct Serial Connections
For most applications, the service end of the SmartSensor cable terminates in a surge pro-
tection device. However, during demonstrations, troubleshooting, and certain other situa-
tions, it is sometimes convenient to bypass surge protection and connect directly to a per-
sonal computer or communications device such as a modem.
Older sensors and the retrot SmartSensor Advance are congured as an RS-232 DTE de-
vice. To connect the SmartSensor cables RS-232 wires directly to another DTE device (such
as a PC), you can use a standard 9-pin D connector and a null modem cable. To connect
directly to a DCE device (such as a modem), you will need a straight-through cable. Figure
C.1 illustrates both of these cases.
SmartSensor
connector
Power wires
RS-485 wires
Null modem cable
Straight-through cable
OR
DTE device (PC)
DCE device (Modem)
Figure C.1 – Direct Serial Connections
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