SCP 111 S-DIAS SAFETY CPU MODULE
Page 22 05.12.2023
6.2.2 S-DIAS Bus/Safety Supply (Output)
in the
S-DIAS Safety bus
(supply of the I/O modules)
(1)
For USA and Canada:
The supply must be limited to:
a) max. 5 A at voltages from 0-20 V DC, or
b) 100 W at voltages from 20-60 V DC
The limiting component (e.g. transformer, power supply or fuse) must
be certified by an NRTL (Nationally Recognized Testing Laboratory).
(2)
Dependent on the number of connected modules on the S-DIAS
Safety bus
(3)
For loading the internal capacitors a higher power consumption can
occur for a short time (microseconds). This value depends on the input
voltage and the impedance of the supply source.
(4)
If this S-DIAS Safety CPU module is connected to several modules,
the total currents for +24 V and +12 V must be calculated based on the
module documentations of the used S-DIAS Safety modules! The total
current of the +24 V supply must not exceed 800 mA. The total current
of the +12 V supply must not exceed 800 mA.
(5)
With increased ambient temperature >55 °C the maximum
permissible supply voltage is reduced from 30 V to 28.8 V.
If the SCP 111 with a firmware version lower than V431 resp. with a
Safety number lower than S01.03.01 is integrated with Safety I/O
modules in the S-DIAS system (blue modules), the voltage increase of
the +24 V supply of the SCP 111 must not happen later than 100 ms
after the voltage supply of the S-DIAS supply modules, otherwise it can
happen, that the SCP 111 does not recognize the Safety I/O modules
on the Safety bus. This results in a Safety error (error code 1009,
reason code 15 in the Safety Designer) and thus the Safety application
is not started.
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