Power Supply - Oldham OLCT 80 User Manual

Figure 38: sensor pointing downward (left); maximum angle for an combustible
gas detector (right).

Power supply

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
Combustible Catalytic
Combustible XPIR infrared
Freon Semiconductor
Oxygen Electrochemical
Toxic Electrochemical
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
Combustible Catalytic
Combustible XPIR infrared
Freon Semiconductor
Oxygen Electrochemical
Toxic Electrochemical
Power Max.
supply current
(VDC) (mA)
16 to 28 170
16 to 28 130
16 to 28 170
12 to 30 100
12 to 30 100
Maximum length (km) depending on
the cable gauge (cross sectional
area)
2 2
0.5 mm 0.9mm 1.5 mm
0.75 1.31 2.33
1.11 1.95 3.44
0.75 1.31 2.33
1.92 3.36 5.95
1.6 2.8 4.95
4 – Installation
Power
consumption
(W)
2.72
1.84
2.72
1.2
1.44
2
55