Bosch CL400 - Page 41

Flexible Automation
Subracks
2-13
1070 072 143-101
Expansion unit
In the expansion unit, the use of a fan unit is dependent on the heat dissipa
tion of the modules installed there. Always assess whether a fan unit is re
quired in the expansion unit.
Examples for various configurations of the subracks and for the fitting of fan
units may be found in section 6.1 Fan mounting and assembly of the sub
racks.
Failure contact
The fan unit has a failure contact for purposes of fault recognition, which
can be evaluated on a systemspecific basis. The following faults can be
recognised and signalled via the failure contact:
D Standstill of one or several fans.
D Falling below the 24 V supply voltage.
CAUTION 2.1
Danger to the fan unit!
Observe the maximum switching voltage and capacity for the failure
contact, see fig. 2-11 Fan units, specifications!
. With regard to the degree of contamination of the ambient air, the filter
mat of the fan unit must be regularly inspected and replaced if necess
ary, see subsection 2.6.2 Replacing the filter mats.
Specifications
Specifications
Order no. 1070 ... ...
p
062 325 052 243 056 864
Number of fans 3 2 1
Power supply 24 V- to DIN 19 240
Power input from 24 V external 1.0 A 0.8 A 0.6 A
Reverse polarity protection Fuse
M 0.1 A
via diode
Failure contact
D Switching voltage
D Switching capacity
max. 250 V-
max. 100 W
max. 60 V-, 125 V
max. 30 W, 60 VA
Response time of failure contact
when fault arises
typ. 5 s, max. 8 s
Response time of failure contact
for fault removal
5 s
Fig. 2-11 Fan units, specifications