Alicat P Series Pressure Gauge - Manual (Page 12)

12
OUTPUT SIGNALS
RS-232 / RS-485 Digital Output Signal
To use the RS-232 or RS-485 output signal, it is necessary to connect the RS-232
/ RS-485 Output Signal (Pin 5), the RS-232 / RS-485 Input Signal (Pin 3), and
Ground (Pin 8) to your computer serial port as shown on page 8. (See page 34
for details on accessing RS-232 / RS-485 output.)
Standard Voltage (0-5 Vdc) Output Signal
Gauges/controllers equipped with a 0-5 Vdc (opti onal 0-10 Vdc) will have this
output signal available on Pin 6. This output is generally available in additi on to
other opti onally ordered outputs. This voltage is usually in the range of 0.010
Vdc for zero fl ow and 5.0 Vdc for full-scale fl ow. The output voltage is linear
over the enti re range. Ground for this signal is common on Pin 8.
Opti onal 0-10 Vdc Output Signal
If your gauge/controllerwas ordered with a 0-10 Vdc output signal, it will be
available on Pin 6. (See the Calibrati on Data Sheet that shipped with your device
to determine which output signals were ordered.) This voltage is usually in the
range of 0.010 Vdc for zero fl ow and 10.0 Vdc for full-scale fl ow. The output
voltage is linear over the enti re range. Ground for this signal is common on Pin 8.
Opti onal Current (4-20 mA) Output Signal
If your gauge/controllerwas ordered with a 4-20 mA current output signal, it will
be available on Pin 1. (See the Calibrati on Data Sheet that shipped with your
device to determine which output signals were ordered.) The current signal is
4 mA at 0 fl ow and 20 mA at the device’s full scale fl ow. The output current is
linear over the enti re range. Ground for this signal is common on Pin 8. (Current
output units require 15-30Vdc power.)
Opti onal 2nd Analog Output Signal
You may specify an opti onal 2nd analog output on Pin 2 at ti me of order. (See
the Calibrati on Data Sheet that shipped with your device to determine which
output signals were ordered.) This output may be a 0-5 Vdc, 0-10 Vdc, or
4-20 mA analog signal that can represent any measured parameter. With this
opti onal output, a meter could output the volume fl ow rate (0-5 Vdc on pin 6)
and the line temperature (0-5 Vdc on pin 2).
If your device is CSA/ATEX approved or equipped with the opti onal six pin
industrial connector, please contact Alicat.
CAUTION! Do not connect this de�ice to “�oop powered’”
s�stems, as this wi�� destro� portions o� the circuitr� and �oid
the warrant�. I� �ou must inter�ace with e�isting �oop powered
s�stems, a�wa�s use a signa� iso�ator and a separate power supp��.