26 AO2000-LS25 LASER ANALYZERS | OI/AO2000-LS25-EN REV. D
… 3 Use in hazardous areas in accordance with CSA
… Electrical connections
Terminal layout
Transmitter unit – signal cable to receiver unit
Signal
—
RU Temp +
MODSQ +
RU GND +
RU GND −
Direct −
2. Harmonic −
Servo +5 V*
Table 14: Transmitter unit – signal cable connection assignment
* Only connected for devices equipped with option “Span check with internal
sealed cell”. This option is only available on request.
Signal from embedded receiver temperature sensor
Modulation signal from transmitter to receiver (used
for detection of 2. harmonic)
Power supply to receiver unit
Direct laser transmission signal from receiver detector
Detected second harmonic signal from receiver
detector
Control of servomotor moving sealed cell
Table 15: Description of signals
Note
The voltage for alignment purposes (see Setting the maximum
transmission on page 48) is also available at plug J14.
Receiver unit – signal cable
Table 16: Receiver unit – signal cable connection assignment
* Only connected for devices equipped with option “Span check with internal
sealed cell”. This option is only available on request.
Transmitter unit – power supply / analog inputs
-36 V in
to 36 V
DC from power
supply unit
V in
V from the power supply
Table 17: Transmitter unit – connection assignment for power supply / analog inputs
* Factory mounted cables may be replaced.
J6 – Power supply from power supply unit to transmitter unit.
All 3 power pairs should be wired to ensure even current flow.
External temperature and pressure sensors can be connected
inside the transmitter connection box to J5 terminals 1 to 8.
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