Specifications
Leuze electronic
BCL 504
i
35
TNT 35/7-24V
5.2
Heating models of the barcode readers
The BCL 504
i
barcode readers are optionally available as models with integrated heating.
In this case, heating is permanently installed ex works. Self-installation on-site by the user
is not possible!
Features
• Integrated heating (permanently installed)
• Extends the application range of the BCL 504
i
to -35°C
• Supply voltage 24VDC ±20%
• BCL 504
i
enabling through an internal temperature switch
(switch-on delay about 30min for 24VDC and minimum ambient temperature of -
35°C)
• Necessary conductor cross-section for the voltage supply: at least 0.75mm²; the use
of ready-made cables is, thus, not possible.
Construction
The heating consists of two parts:
• The front cover heater
• The housing heater
Function
When the 24VDC supply voltage is applied to the BCL 504
i
, a temperature switch initially
only connects the heating to electrical power (front cover heater and housing heater). During
the heating phase (around 30min), when the inside temperature rises above 15°C, the
temperature switch connects the BCL 504
i
to the supply voltage. This is followed by the self
test and the changeover to read operation. The "PWR" LED lights up showing overall read-
iness for operation.
When the inside temperature reaches approximately 18 °C, another temperature switch
turns the housing heater off and, if necessary, back on again (if the inside temperature drops
below 15°C). This does not interrupt the read operation. The front cover heater remains acti-
vated until an inside temperature of 25°C is reached. At temperatures above this, the front
cover heater switches off and, with a switching hysteresis of 3°C, back on again at an inside
temperature below 22°C.
Electrical connection
The required core cross-section of the connection cable for the voltage supply must be at
least 0.75 mm².
Attention!
The voltage supply must not be looped through from one device to the next.