7
2120544-07-07/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-AS2A-C04
EN
6. Function
The safety switch monitors the position of movable guards. When the actuator is moved to/removed from the actuating
range, a corresponding bit sequence is sent via the AS-Interface bus.
The system consists of the following components: coded actuator (transponder) and switch.
Whether the device learns the complete actuator code (unicode) or not (multicode) depends on the respective version.
Devices with unicode evaluation:
The actuator must be assigned to the safety switch by a teach-in operation so that it
is detected by the system. This unambiguous assignment ensures a particularly high level of protection against tampering.
The system thus possesses a high coding level.
Devices with multicode evaluation:
Unlike systems with unicode evaluation, on multicode devices a specific code is not
requested but instead it is only checked whether the actuator is of a type that can be detected by the system (multicode
detection). There is no exact comparison of the actuator code with the taught-in code in the safety switch (unicode evalua-
tion). The system possesses a low coding level.
When the guard is closed, the actuator is moved towards the safety switch. When the operating distance is reached, power
is supplied to the actuator by the switch and data are transferred.
When the guard is closed and the code is permissible, each CES-I-AS transmits a switch-specific, unique safety code sequence
with 8 x 4 bits via the AS-Interface bus.
The zero sequence is transmitted via the AS-Interface bus when the guard is opened.
In the event of a fault in the safety switch, the zero sequence is sent and the DIA LED illuminates red. The occurrence of
faults is detected at the latest on the next demand to close the safety outputs (e.g. on starting).
6.1. Limit-range monitoring
If the safety door with the actuator should settle over time, the actuator can drift out of the read head actuating range. The
device recognizes this situation and indicates that the actuator is in the limit range by flashing the STATE LED. This allows
the safety door to be readjusted in time. Also see chapter
10. System status table on page 13
6.2. Switching states
The detailed switching states for your switch can be found in the system status table. All safety outputs, monitoring outputs
and display LEDs are described there.
Guard closed
(actuator in the actuating range and permissible
code detected)
Guard open
(actuator not in the actuating range)
Programming
State
D0, D1
D2, D3
Monitor diagnostics
Dual-channel
dependent
Synchronization time ≥
100 ms /
Dual channel
positively driven
Guard closed
Code sequence
Green
If start-up test selected:
yellow flashing on start-up
Intermediate state during opening or closing of the
guard.
Switch S1 (internal) open
Half-se-
quence
00
On opening: yellow flashing
On closing: red
After expiration of the synchronization time:
yellow flashing
Intermediate state during opening or closing of the
guard.
Switch S2 (internal) open
00
Half-se-
quence
Guard open
00
00
Red
Address 0 or communication disrupted
–
Gray
