16
Safety Relais
English
3. General and function description
The ELMON classic 41-312 switching device is used to evaluate sensors such as safety contact mats, safety
contact strips and safety bumpers for securing crush and shear locations.
An ASO sensor can be connected to the switching device. The steady-state current monitoring of the sensor
is made possible by an integrated terminating resistor in the sensor.
If the desired steady-state current flows, the safety relays are driven and the switching contacts closed.
If the sensor is operated or the sensor circuit is interrupted, the relay switching contacts open.
A signal output with potential-free switching contacts is available. An operation of the sensor causes a
reaction of the signal output in accordance with the DIP switch configuration. The signal output must not
execute any safety-orientated functions. It is not fail-safe and not checked by testing either.
The switching device has been designed and type-approved in accordance with EN ISO 13849-1 “Safety-
related parts of control systems” for category 3 Performance Level e. For compliance with category 3, the
safety output is set up redundantly with two independent switching elements.
In addition the device has been type-approved according to EN 62061 “Functional safety of safety-related
electrical, electronic and programmable electronic control systems“ and can meet a safety function up to
SIL 3.
The monitoring state of the sensor and the applied operating voltage are indicated by LED.
If there is a fault alarm, all safety outputs are inactive.
The unit can be used in a household environment as well as in an industrial environment up to
an altitude of 2000m above mean sea level. The unit must not be operated in areas with major
temperature changes.
Functional circuit diagram
13
14
11
12
5
1
6
2
3
4
7
8
9
10
Reset
Mode
R
+U
DIL Switch
Logic
24 V AC/DC
OUT
REL1
OUT
REL1
Sensor
Manual
Reset
ELMON classic 41-312: 230 V AC
(ELMON classic 41-812: 115 V AC)
