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Technical Information
Chapter
4
RFU63x
Electrical installation
8014335/YUO7/2016-04-04
©
SICK AG · Germany · All rights reserved · Subject to change without notice
39
4.5
Notes on the electrical installation of the RFU630 at an
ambient temperature below 0 °C
The RFU630 can be operated at ambient temperatures b50 °C and –25 °C.
4.5.1
Prerequisites
RFU630-13101 UL-certified: Install the device only inside of buildings. The device is not
suitable for outdoor use.
All other variants: For use outdoors, use suitable weather protection, which prevents
the device from heating up due to direct sunlight during the summer and protects the
device from being cooled by the wind during the winter.
Use supply voltage DC 18 V ... 30 V if:
– RFU630 is connected to the optional CDB650-204 or CDM420-0006 connection
module by a specified SICK cold-resistant cable.
– RFU630 is operated without a SICK connection module and connected with a spe-
cified SICK cold-resistant cable.
Protect the cable by a separate fuse 2 A at the start of the incoming supply circuit.
Use supply voltage DC 12 V ... 30 V if:
– RFU630 is optionally operated without a SICK connection module and connected
with the specified SICK cold-resistant cable no. 6048319 (2 x 2.5 mm
2
, 10 m).
Protect the cable by a separate fuse 2.5 A at the start of the incoming supply circuit.
Use SICK standard cables for the ambient temperature range specified, also see
Chapter 4.4 Pin assignments and lead color assignments of cables, Page 32
.
Only carry out connection work in ambient temperatures ranging from 0 °C to +50 °C.
The connecting cables must be fixed in place.
All cables connected to the device are locked. Yellow protective caps or plugs are
screwed onto any electrical connections that are not in use.
The RFU630 may only be operated in ambient temperatures below 0 °C when no
mounting or connection work is being carried out.
When the device is operated on the lowest limit value of the ambient temperature of
–25 °C, it must not exposed to strong air movement (e.g. inhouse due to ventilation).
4.5.2
Behavior of the device after switch-on
Following application of the supply voltage and initialization, the RFU630 can immediately
be accessed by the SOPAS ET configuration software.
Once the supply voltage has been applied, the device uses integrated temperature sensors
to measure its internal temperature. This is handled during booting.
Internal tempera-
ture of housing
Behavior after switch-on
Below –25 °C
"Ready" LED continuously flashes yellow.
Device is not operational as –25 °C is below the specified minimum limit
value.
–20 °C ... –25 °C
"Ready" LED continuously flashes green (warm-up phase).
Device is not operational (communication channel still disabled) until the
internal temperature has increased to –20 °C as a result of the heat gener-
ated by the electronics.
Duration approx. 2 min.
From –20 °C
"Ready" LED permanently lights up green.
The device has started regular operation.