Device description
Leuze electronic GmbH + Co. KG
BPS 307i
11
• Optional model with display
• Optional model with heating for use to -35 °C
3.1.3
Accessories
Special accessories are available for the bar code positioning system. The accessories are optimally
matched to the BPS:
• Highly flexible, scratch-, smudge- and UV-resistant bar code tape
• Mounting devices for precise mounting with one screw (easy-mount)
• Modular connection technology via connection hoods with M12 connectors, spring-cage terminals or
with cable
3.1.4
Device model with heating
The bar code positioning system is optionally available as a model with integrated heating. In this case,
heating is permanently installed ex works.
NOTICE
No self-installation of the heating!
Ä
Self-installation of the heating on-site by the user is not possible.
The heating consists of two parts:
• Front cover heater
• Housing heater
Features of the integrated heating:
• Extends the application range of the BPS to -35 °C
• Supply voltage 18 … 30 V DC
• BPS release through an internal temperature switch (start-up delay of about 30 min for 24 V DC and
minimum ambient temperature of ‑35 °C)
• Required conductor cross-section for the power supply: At least 0.75 mm
2
NOTICE
Do not use ready-made cables!
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It is not possible to use ready-made cables.
The current consumption of the BPS is too high for the ready-made cables.
Function
When the supply voltage is applied to the BPS, a temperature switch initially only supplies the heating with
current (front cover heater and housing heater). During the heating phase (around 30 min), when the inside
temperature rises above 15 °C, the temperature switch connects the BPS to the supply voltage. This is fol-
lowed by the self test and the changeover to read operation. The PWR LED lights up, showing overall
readiness for operation.
When the inside temperature reaches approx. 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 activated 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.