Dc Distribution Network Acc. To Iec 61326-3-1 - Bosch Rexroth IndraControl S20 Manual

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Integrating the local bus
4.4

DC distribution network acc. to IEC 61326-3-1

IndraControl S20 Module With Safe Digital Outputs S20-SSDO-8/3
CAUTION
To avoid a module defect, proceed as follows:
● Due to the maximum current carrying capacity of 8 A, protect the volt‐
age supply U externally with a fuse of 8 A (slow).
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● Only use PELV power supply units with at least 4 times the nominal cur‐
rent required for triggering. Thus, triggering times of less than 300 ms
can be ensured.
The supply voltage U has to be connected to the functional earth acc. to EN
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60204-1.
24 V DC External fuse
(PELV)
+
230 V
-
24 V
Fig. 4-1: Feeding U with connection to the functional earth acc. to EN 60204-1
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Observe the information on the module behavior when an error occurs at the
supply voltage U , refer to
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page 49.
NOTICE
Do no use a "DC distribution network".
A DC distribution network is a DC distribution net supplying a complete indus‐
trial warehouse with direct voltage. Any devices can be connected to it. A typ‐
ical system or machine distribution is no DC distribution network. For devices
intended for a typical system or machine distribution, the DC connections are
considered and checked as I/O signals acc. to IEC 61326-3-1.
DOK-CONTRL-S20*SSDO*8*-AP02-EN-P
A parallel reverse polarity protection is imple‐
mented in the module. This protection is only
temporally limited.
U for feeding at the bus coupler
BK
or an infeed terminal
U for feeding at the IndraControl S20 module
I
GND of the feeding at the bus coupler
or an infeed terminal
chapter 9.2.3 "Errors of the supply voltage" on
Module electronics destroyed due to overvolt‐
age!