EUCHNER MGB-L2-xxxAPx-xxx - Manual (Page 28)

28
Operating Instructions MGB-L1...AR.-... / MGB-L2...AR.-... and MGB-L1...AP.-... / MGB-L2...AP.-...
10.10 Information on operation in an AR switch chain
System times
The guard locking module has longer response times than a CES-AR switch (see
sections 12 Technical data, page 31 and 12.1 Typical system times, page 32).
Wiring an AR switch chain
To prevent earth loops, the wiring should be in a star configuration (see Figure 19).
Important: lay cables in a common harness
Figure 19: Central wiring of CES-AR switch chain in the control cabinet
Output current
The safety outputs on the MGB have a lower maximum output current than a CES-
AR switch (see section 12 Technical data, page 31).
Number of devices in the switch chains
In a pure MGB switch chain a maximum of ten devices can be connected in series.
In mixed switch chains (e.g. MGB together with CES-AR) the maximum number of
devices is also ten.
Resetting in switch chains
Important:
If you use the reset input (RST) for resetting in AR switch chains (RST), all devices
in the chain must be reset at the same time. Resetting individual switches will
result in faults.
AR
CES-AR
terminating plug
CES-AR
CES-AR
PLC
MGB-L.-AR...
+ 24 V DC
cabinet
0 V
FI1A/FI1B
FI1A/FI1B
FO1A/FO1B
FI1A/
FI1B
FO1A/
FO1B
UB 0V UA 0V
#1
#2
#3
#4 MGB-L.-AR... #5
FI1A/FI1B
FO1A/FO1B
FI1A/
FI1B
FO1A/
FO1B
UB 0V UA 0V
FO1A/FO1B