8
POWER AND SIGNAL CONNECTIONS
Power can be supplied to your controller through either the power jack (power jack
not available on CSA/ATEX approved devices) 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.
Small Valve
controllers require a 12-30Vdc power supply with a 2.1 mm female
positive center plug capable of supplying 250 mA.
NOTE: 4-20mA analog output
requires at least 15 Vdc.
Large Valve
controllers require a 24-30 Vdc power supply with a 2.1 mm female
positive center plug capable of supplying at least 750mA.
Standard 8 Pin Mini-DIN Pin-Out
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
Meters/Gauges = Remote Tare (Ground to Tare)
Controllers = Analog Setpoint Input
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.
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 setpoint signal.
For 6 Pin Locking Industrial Connector, DB9 and DB15 pin-outs see pages 91
to 94. For PROFIBUS pin-outs see page 89.
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