Teledyne 3010TB Operating Instructions Manual page 27

Oxygen Analyzer
Thermistor
Block
Sensor
Block
Sample In
Span In
CU
Zero In
Exhaust
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.
Thermistor 1
Thermistor 2
Sensor Return (-)
Sensor Hot (+)
Figure 3-7 Remote Sensor Connector Pinouts
+15 V dc
+
Sample (return)
-
+15 V dc
+
Span (return)
-
+15 V dc
+
Zero (return)
-
+15 V dc
+
Exhaust (return)
-
Figure 3-9: FET Series Resistance
Teledyne Analytical Instruments
Part I: Control Unit
Sensor Signal 8
Sensor Signal 2
Sensor Signal 1
Sensor Signal 7
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
Part I: 3-11
AU