Operating Manual
ARS31(Pro)-UMB
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
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8.3 Operating conditions
Permissible operating temp.:
-40°C ... +80°C
1)
0°C... +60°C for firmware update only
Permissible relative humidity:
0 ... 100% RH
Perm. height above sea level:
3000 m
8.4 Electrical data
Power supply:
24 VDC ± 10% (for a cable length up to 15 meters).
For cable length over 15 meters see chapter 5.2.1.1.
Current- and power consumption: approx. 1,25A / 30 W at 24VDC at the sensor
Protection class:
III (SELV)
Attention: the power input increases with the cable length !
For example: with the 50-meter-cable (8810.U051):
current consumption:
approx. 1,7 A
For more details about enlarging the cable please read chapter 4.2.1.
8.5 Interfaces
4-core connection cable with power supply and RS485 (2-wire, half-duplex) for
configuration and measurement requests. Ex works cable type LI-2YCYv2X2X0.5.
8.6 Mechanical data (excluding cable)
Dimensions (W x H x D):
120mm; height: 50mm
Weight ARS31Pro-UMB:
approx. 1100g
Weight ARS31-UMB:
approx. 900g
Protection class:
IP68
1)
The sensor only measures freezing temperature and threat of icing in the road surface
temperature range -
30°C … +5°C (adjustable up to 10°C). Above 60°C an error code is
transmitted.
