TELEDYNE OLDHAM SIMTRONICS OLCT 80 d, User Manual

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OLCT 80
GAS TRANSMITTER
USER MANUAL
NPO80GB
Revision F.1
53
Figure 38: sensor pointing downward (left); maximum angle for an combustible gas detector (right).
4.6 Power supply
4.6.1 Current in the power line
The power consumption listed in the table below corresponds to an
OLCT 80 equipped with a
main sensor. It does not include the power consumption of an ANA1/ANA2 sensors used.
Detector type Sensor type Power supply
(VDC)
Max. current (mA) Power
consumption (W)
Combustible Catalytic 16 to 28 170 2.72
Combustible XPIR infrared 16 to 28 130 1.84
Freon Semiconductor 16 to 28 170 2.72
Oxygen Electrochemical 12 to 30 100 1.2
Toxic Electrochemical 12 to 30 100 1.44
4.6.2 Length of the power line
The detector must be connected to a dedicated power supply or a central power source (central
measuring controller, PLC) using a shielded, armored (where necessary) cable. The cable should
be selected based on distance, the detector type and any requirements specific to the facility.
Detector type Sensor type Maximum length (km) depending on the cable gauge
(cross sectional area)
0.5 mm 2 0.9mm 2 1.5 mm 2
Combustible Catalytic 0.75 1.31 2.33
Combustible XPIR infrared 1.11 1.95 3.44
Freon Semiconductor 0.75 1.31 2.33
Oxygen Electrochemical 1.92 3.36 5.95
Toxic Electrochemical 1.6 2.8 4.95