Chapter
10
Operating Instructions
Compact OMNI Scanner
10-12
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8 009 237/0000/07-05-2002
Appendix
10.4
Optional heating
10.4.1
Features
•
Integrated heater (permanently installed)
•
Wider range of applications for CLX: up to max. –30
°
C without air draft
•
Supply voltage 24 V DC +20%/–10%
•
CLX enabled via internal temperature switch (power-up delay approx. 35 ... 40 minutes
at 24 V DC and min. ambient temperature of –30
°
C)
•
Required cable cross-section (power supply): min. 0.75 mm
2
10.4.2
Design
The heating system comprises two parts:
•
the front window heater
•
the housing heater
The optional heating system is installed and tested at the factory. The user cannot install it
on site.
10.4.3
Function
When the 24 V DC supply voltage is applied, a temperature switch first supplies electric
current to the heater only. This switch enables the supply voltage for the CLX when the in-
ternal temperature rises above 7
°
C during the warm-up phase (approx. 35 min). The device
then performs a self-test and switches to Reading mode. The "Device Ready" LED lights up
to indicate that the device is ready.
When the internal temperature has reached approx. 25
°
C, a further temperature switch
deactivates the housing heater and reactivates it if necessary. Reading mode is not inter-
rupted as a result. The front window heater remains active constantly. The temperature
curve inside the housing is shown in
.
Fig. 10-10: CLX with heater: Temperature curve inside the housing
Temperature
inside housing [
°
C]
The temperature enables the operating
voltage for the CLX internally
Time [min]
