Percent Paramagnetic Oxygen Analyzer Part I: Control Unit
Part I: 3-11Teledyne Analytical Instruments
Figure 3-7 Remote Sensor Connector Pinouts
Figure 3-8: Remote Solenoid Return Connector Pinouts
The voltage from the solenoid outputs is nominally 0 V for the OFF
and 15 V dc for the ON conditions. The maximum combined current that
can be pulled from these output lines is 100 mA. (If two lines are ON at the
same time, each must be limited to 50 mA, etc.) If more current and/or a
different voltage is required, use relays, power amplifiers, or other matching
circuitry to provide the actual driving current.
Note that each individual line has a series FET with a nominal ON
resistance of 5 ohms (9 ohms worst case). This can limit the obtainable
voltage, depending on the load impedance applied. See Figure 3-9.
Figure 3-9: FET Series Resistance
Thermistor
Block
Sensor
Block
Thermistor 1
Thermistor 2
Sensor Return (-)
Sensor Hot (+)
Sensor Signal 8
Sensor Signal 2
Sensor Signal 1
Sensor Signal 7
Sample In +
-
-
+
+
-
+
-
+15 V dc
Span (return)
Sample (return)
Zero (return)
+15 V dc
+15 V dc
Exhaust (return)
+15 V dc
Exhaust
Zero In
Span In
Solenoid Valve 3
Solenoid Valve 4
Solenoid Valve 9
Solenoid Valve 10
Solenoid Valve 5
Solenoid Valve 6
Solenoid Valve n/a
Solenoid Valve n/a
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