Table of Contents
Safety circuits
4.4
Safety circuits
Example 1
The following figure provides an example of the configuration of a safety circuit when using two
control units, one external power supply, one door closing contact and one activation unit.
EMERGENCY-
EMERGENCY-
Control output
Auxiliary axles
EMERGENCY-
EMERGENCY-
Control output
Auxiliary axle
Fig. 4-11: Configuration of a safety circuit (Example 1)
NOTE
To facilitate clarity, some information has been omitted from the figure; the figure therefore
deviates from the actual conditions of the product.
4 - 10
Control unit 1
STOP
RA
STOP
Internal
safety
circuit
5A/5B
6A/6B
EMGOUT1/2
Control unit 2
STOP
RA
STOP
Internal
safety
circuit
5A/5B
6A/6B
EMGOUT1/2
Output for
EMGIN1/2
Unassigned
system
EMERGENCY-STOP
1A/1B
(to be provided by
2A/2B
3A/3B
4A/4B
5A/5B
6A/6B
Unassigned
Input
door contact
8A/8B
9A/9B
RA
EMGIN1/2
RA
1A/1B
Error
}
output
2A/2B
including
SW EMERGENCY-STOP
RA
3A/3B
Output for
}
4A/4B
operating
Activation unit
EMGOUT1/2
10A/10B
11A/11B
RA
External
EMGIN1/2
EMERGENCY-
1A/1B
2A/2B
3A/3B
4A/4B
5A/5B
6A/6B
Input
door contact
8A/8B
9A/9B
RA
EMGIN1/2
RA
1A/1B
Error
}
2A/2B
output
including
SW EMERGENCY-STOP
RA
3A/3B
}
Output for
4A/4B
operating
EMGOUT1/2
Activation unit input
10A/10B
Bridge
11A/11B
RA
Peripheral units
Fuse
RA
positively
driven
Monitor
Fuse
RA
positively
driven
Monitor
Door
Output for
door contact
Connection
Internal
safety
circuit
R001514E
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