Acuity AccuRange AR3000, User Manual

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AR3000 User’s Manual
13
Rev 1/10
The Blue wire is the Power Supply Input to the sensor. The sensor re24 VDC power
and consumes <5 W without the heater and 11.5 W when the automatic heater is on.
Power supplies from 10 VDC to 30 VDC may be used. Higher voltages will result in
excessive current drawn by the over-voltage protection circuitry and may cause permanent
damage. 24 VDC should be used when the heater may be needed. Voltages less than 10 VDC
may result in inaccurate measurement readings or the AR3000 not even turning on.
4.1.2.
Shield (Clear)
The un-insulated wire is the cable and case shield and is connected to ground inside the
sensor. It should also be connected to ground at the power supply end of the cable.
4.1.3.
Serial Communications RS232 or RS422 (Brown, White, Gray, Pink)
Both the RS232 and RS422 models are compatible with the associated ANSI communication
standards. The desired model (RS232 or RS422) must be selected when ordering the
AR3000.
See Serial Interface Operation (section 5) for information on commands and data.
RS232 model: RS232 is normally used for slower speeds and shorter distances of
communications. A standard 9-pin D-SUB RS232 serial female connector can be built to
interface with an IBM or compatible computer using connection the pins below.
Color Pin
White 2 Transmit data from sensor
Brown 3 Receive data to sensor
Black 5 Signal ground reference
n/c 1, 4, 6 DCD, DTE, DCE – These three signals can be tied together to satisfy
some PC signal requirements for hardware handshake.
n/c 7, 8 CTS, RTS – These two signals can be tied together to satisfy some PC
signal requirements for hardware handshake.
Table 3 RS232 Model Serial Connections
RS422 model: RS422 is normally used for faster speeds and longer distances of
communications. Two wires, usually twisted together, carry each differential (noise-immune)
signal. There are no standard PC connections. A special adapter is required to connect to a PC
to an RS422 model.
Color
White Receive data to sensor (+)
Brown Receive data to sensor (-)
Pink Transmit data from sensor (+)
Gray Transmit data from sensor (-)
Black Signal ground reference
Table 4 RS422 Model Serial Connections