Power and signal connections, Not connected – Alicat P Series Pressure Gauge User Manual
Page 9
9
POWER AND SIGNAL CONNECTIONS
Power can be supplied to your gauge/controller through either the power jack or
the 8 pin Mini-DIN connector.
An AC to DC adapter which converts line AC power to DC voltage and current as
specified below is required to use the power jack.
A 2.1mm, positive center, 7-30 Vdc AC/DC adapter rated for at least 100 mA is
required to use the adapter jack in a P-Series meter.
A 2.1mm, positive center, 12-30 Vdc AC/DC adapter rated for at least 250 mA is
required to use the adapter jack in a PC-Series controller.
A 2.1mm, positive center, 24-30 Vdc AC/DC adapter rated for at least 500 mA is
required to use the adapter jack in a PCR-Series controller.
NOTE: 4-20mA analog output requires at least 15 Vdc.
CAUTION!
Do not connect power to pins 1 through 6 as permanent damage can occur!
It is common to mistake Pin 2 (labeled 5.12 Vdc Output) as the standard 0-5 Vdc
analog output signal. In fact Pin 2 is normally a constant 5.12 Vdc that reflects the
system bus voltage and can be used as a source for the set-point signal.
For 6 Pin Locking Connector, DB9 and DB15 Pin-outs see pages 69 to 80.
For PROFIBUS Pin-outs see page 67.
Standard 8 Pin Mini-DIN Pin-Out
1
2
3
4
5
6
7
8
Pin Function
Mini-DIN
cable color
1
Not Connected
(or optional 4-20mA Primary Output Signal)
Black
2
Static 5.12 Vdc [or optional Secondary Analog Output (4-20mA,
5Vdc, 10Vdc) or Basic Alarm]
Brown
3
Serial RS-232RX / RS-485(–) Input Signal (receive)
Red
4
Analog Input Signal
Orange
5
Serial RS-232TX / RS-485(+) Output Signal (send)
Yellow
6
0-5 Vdc (or optional 0-10 Vdc) Output Signal
Green
7
Power In (as described above)
Blue
8
Ground (common for power, communications and analog signals)
Purple
Note: The above pin-out is applicable to all the flow meters and controllers with the
Mini-DIN connector. The availability of different output signals depends on the options
ordered. Optional configurations are noted on the unit’s calibration sheet.
Electrical Connections and Basic Wiring
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