EUCHNER CES-AR-AES-12 - Manual (Page 19)

Operating Instructions AR Evaluation Unit CES-AR-AES-12
19
Dimension drawing
System times for the AR system
Typical system times
Ready delay: After switching on, the unit carries out a self-test for 8 s. The system
is ready for operation only after this time.
Risk time according to EN 60947-5-3: If an actuator leaves the operating
distance, the safety contacts on the AR evaluation unit are opened at the latest
after 520 ms.
Difference time: The safety contacts on the AR evaluation unit switch with a
slight time offset. They have the same signal state at the latest after a difference
time of 10 ms.
Important!
The system times shown are maximum values for a circuit arrangement with
12 safety switches connected in an AR switch chain. Shorter times can also be
achieved in circuits with fewer switches.
t
0
t
0
t
0
=
=
+ 520 ms t
off
t
0
+ 450 ms t
off
t
off
t
0
= + 750 ms t
off
Normal operation
Fault detection Short circuit on IA/IB
Actuator removal
or deactivating of
a guard locking
Non-identical input state
on IA/IB or short circuit
on IA or IB
or internal fault
t (ms)
= Safety outputs active
= Switch-off time
= Fault time/event
Fig. 9: System times for AR evaluation unit on an AR switch chain with 12 safety
switches
45
99
114
O4
O12
O3
O11
O2
O10
O1
O9
+UB
+UB 0V
S
DIA
Y2 Y1
43
44 33
34 23
24 13
14
CES-AR
EUCHNER
Safety Unit
O5
IA
O6
IB
O7
RESET
DIA OUT STATE
O8
0V AR UB AR
OUT AR
Suitable for DIN rail
according to DIN 60715