Wavetronix SmartSensor HD (101-0415) - User Guide - Manual (Page 85)

84 APPENDIX • SMARTSENSOR HD USER GUIDE
Note
These instructions apply to both the 8-conductor cable and the 9-conductor cable.
The 9-conductor/8-conductor cables’ DC (red and black) wires are a 20 AWG wire pair.
The other wires in the cable are 22 AWG and are used for communication, as detailed in the
earlier appendices.
Cable Gauge 24 Volts 12 Volts
20 AWG 600 ft. (182.9 m) 110 ft. (33.5 m)
Additional 22 AWG Add 400 ft. (121.9 m) Add 75 ft. (22.9 m)
22 AWG 400 ft. (121.9 m) 75 ft. (22.9 m)
Additional 22 AWG Add 400 ft. (121.9 m) Add 75 ft. (22.9 m)
14 AWG 2500 ft. (762 m) 450 ft. (137.2 m)
12 AWG 3900 ft. (1188.7 m) 700 ft. (213.4 m)
10 AWG 6000 ft. (1828.8 m) 1050 ft. (320 m)
8 AWG 9900 ft. (3017.5 m) 1750 ft. (533.4 m)
6 AWG 14,000 ft. (4267.2 m) 2500 ft. (762 m)
Table C.1 – Maximum Cable Length for Power
If the cable length is longer than 600 ft. (182.9 m) when operating at 24 VDC, it is possible
to increase the maximum cable length by wiring a pair of lines normally used for RS-232
communications with the red and black wires.
In many cases, if the cable length is 200 ft. (61 m) or greater you cannot reliably use RS-232
communications. To add 400 ft. (121.9 m) and achieve a maximum cable length of 1000
ft. (304.8 m), connect the orange wire (normally RTS) to the red wire and the brown wire
(normally CTS) to the black wire.
If your cable run is longer than 1000 ft. (304.8 m), it is possible to sacrifice additional com-
munication pairs to increase the maximum cable length for power. However, you may de-
sire to communicate to the sensor over two independent channels, in which case you will
need to consider an alternate cable for power. The AWG for wire pairs that achieve a 2000
ft. (609.6 m) maximum cable length or greater at 12 and 24 VDC are listed in Table A.1.
To achieve reliable wired communications, the selected baud rate must be compatible with
the length of the cable run. Table C.2 below shows the cable length recommendations for
wired communications: