Operating Instructions

33
2119167-06-06/20 (translation of the original operating instructions)
Operating Instructions Safety Systems
MGB-L1…-AR.-… / MGB-L2…-AR.-… and MGB-L1…-AP.-… / MGB-L2…-AP.-…
EN
12.12. Information on operation in an AR switch chain
AR
12.12.1. System times
The locking module has longer reaction times than a CES-AR switch (see chapters 14. Technical data on page 36
and 14.1. Typical system times on page 38).
12.12.2. Wiring an AR switch chain
To prevent earth loops, the wiring should be in a star conguration (see Figure 20).
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
Important: lay cables in a common harness
Figure 20: Central wiring of an AR switch chain in the control cabinet
12.12.3. Number of devices in 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.
12.12.4. Resetting in switch chains
Important!
Use the reset input (RST) for resetting in AR switch chains. All devices in the chain must be
reset simultaneously. Resetting individual switches will result in faults.