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Analog Interface
An 15-pin D subminiature female receptacle for analog interface is located on
the rear of the control/pump box.
Pin #
Function
1
Chassis ground.
2
No connection.
3 - 5
No connection.
6
Analog Ground. The analog ground is physically separated from the power ground
throughout the circulator. To prevent offsets that result from ground currents, the analog
and power grounds are only connected at the circulator's power supply. Analog ground
should only be used as a reference pin .
7
Temperature Out. The fluid temperature, as measured by the controller's sensor
located in the reservoir, can be read at this pin. The temperature scale is 10mV/°C,
referenced to analog ground, pin 6 (example: +150mV = +15.0°C).
8
No connection.
9
Power Ground (5V RTN).
10 - 13
No connection.
14
+5V. Power supply of +5VDC (15mA maximum).
15
Setpoint In. The temperature setpoint can be controlled by applying a known voltage
to this pin. The temperature scale is 10mV/°C, referenced to analog ground, pin 6
(example: +230mV = +23.0°C). Note: The setpoint is updated only when the voltage
represents a temperature within the setpoint limits.
The analog setpoint signal (Setpoint In) is enabled using the circulator's
software. Using the Setup Loop discussed on pages 12 - 14, keep depressing
the NEXT ENTER key until SP is displayed. Use the YES or NO key to display
the desired mode, AnA for analog or LoC for local, then press NEXT ENTER
twice to continue with the loop. NOTE: The last value entered is maintained
when SP is changed from AnA to LOC or LOC to AnA. Store the changes.
- 18 -
ACCESSORY
8
7
6
5
4
3
2
15
14
13
12
11
10
9
15 pin D-subminiature female receptacle
1
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