Acuity AccuRange AR1000, Руководство пользователя

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AR1000 User’s Manual
Rev 1.7 1/10
12
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. Voltages less than 10 VDC may result in inaccurate measurement readings. With
the use of the on-board heater, the AR1000 sensor uses 24 W of power at 24 VDC.
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 (Green, Yellow, Black, Violet)
RS232 and RS422 modes are compatible with the associated ANSI standards.
See Serial Interface Operation (section 5) for information on commands and data.
RS232 : 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
Green 2 Trasmit data from sensor
Yellow 3 Receive data to sensor
Gray 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.
RS422 : 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 using RS422.
Color
Green Receive data to sensor (+)
Yellow Receive data to sensor (-)
Voilet Trasmit data from sensor (+)
Black Trasmit data from sensor (-)
Gray
Signal ground reference
4.1.4.
Analog Output (Blue, Red)
The Blue wire is the return signal for the Analog Output. It is connected to ground inside the
sensor and should not be connected to ground outside the sensor. Inadvertently connecting it
to ground may cause a reduction in accuracy of the analog output. The analog signal for
distance is a 4-20 mA current loop. Sensor error signaling can be configured to output either
3 mA or 21 mA.
In Current Loop mode the Red wire delivers a current proportional to the measured distance.