Wavetronix SmartSensor HD Manual page 14

SmartSensor HD
The cable shall be the Orion Wire Combo-2206-2002-PVCGY or an equivalent cable that conforms to the following
specifications:
• The RS-485 conductors shall be a twisted pair.
• The RS-232 and RS-485 conductors shall have nominal capacitance conductor to conductor of less than 45 pF/ft at 1
kHz.
• The RS-232 and RS-485 conductors shall have nominal conductor DC resistance of less than 16.5 ohms/1000 ft.
(304.8 m) at 68°F (20°C).
• The power conductors shall be one twisted pair with nominal conductor DC resistance of less than 11.5 ohms/1000 ft.
(304.8 m) at 68°F (20°C).
• Each wire bundle or the entire cable shall be shielded with an aluminum/mylar shield with a drain wire.
The cable shall have a single continuous run with no splices.
The cable shall be terminated only on the two farthest ends of the cable.
The cable length shall not exceed the following limits for the operational baud rate of RS-485 communications:
Baud Rate
115.2 Kbps 300 ft. (91.4 m)
57.6 Kbps 600 ft. (182.9 m)
38.4 Kbps 800 ft. (243.8 m)
19.2 Kbps 1000 ft. (304.8 m)
9.6 Kbps 2000 ft. (609.6 m)
NOTE: These represent maximum data rates. The data rate used should be the minimum data rate required for operation.
If communication is conducted over the RS-232 bus, then the RS-232 driver must be able to source and sink ±7 mA or
more.
The cable length shall not exceed the following limits for the operational baud rate of RS-232 communications:
Baud Rate Cable Length
115.2 Kbps 40 ft. (12.2 m)
57.6 Kbps 60 ft. (18.3 m)
38.4 Kbps 100 ft. (30.5 m)
19.2 Kbps 140 ft. (42.7 m)
9.6 Kbps 200 ft. (61 m)
NOTE: These represent maximum data rates. The data rate used should be the minimum data rate required for operation.
If 12 VDC is being supplied for the RVSD then the cable length shall not exceed 110 ft. (33.5 m).
If 24 VDC is being supplied for the RVSD then the cable length shall not exceed 600 ft. (182.9 m).
If a cable length of 600 ft. (182.9 m) to 2000 ft. (609.6 m) is required, the power cable shall be an ANIXTER 2A-1402 or
equivalent cable that meets the following requirements:
• 10 AWG conductor size/gauge
• Two conductor count
• Stranded cable type
• Bare copper material
• 600 V range
• 194°F (90°C) temperature rating
• PVC/nylon insulation material
• PVC—polyvinyl chloride jacketing material
14
Cable Length
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