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463 121 B1 / 463 124 B1
6
Function
The safety evaluation unit monitors a connected sensor that is equipped with
one make contact and one break contact. The safety evaluation unit switches
its safety outputs in accordance with the operating statuses of the connected
sensors and the connected external contactors.
The safety output also remains switched through after start-up when the return
circuit (terminals 12 and 13) reopens.
In the following situations, the safety evaluation unit switches through
the safety outputs:
- The sensor is correctly actuated.
- The feedback contacts of the external contactors are closed.
In the following situations, the safety evaluation unit switches off the
safety outputs:
- The make contact of the connected sensor is opened or the break contact of
the connected sensor is closed.
- A fault is pending (safety evaluation unit or connected sensor is defective).
LED displays
LED at
LED does not
terminal
light up
2
Operating voltage
not applied or
serious fault
13
The feedback
contact of the
external contactor
is open
11
Sensor not
actuated
Waiting period
The waiting period is the maximum time permitted on a sensor between the
closing of a make contact and the opening of a break contact.
Safe condition
The safety outputs are opened or with high resistance.
7
Technical specifications
See Technical specifications beginning on page 9.
8
Installation
Danger of electrocution!
Ensure that the safety evaluation unit is only put into opera-
tion by specially-trained authorized personnel.
Danger
- Installation of the safety evaluation unit is only permitted in a voltage-free
state.
- Ensure that the required fuses (see Technical specifications) are used.
- Snap the safety evaluation unit onto a DIN rail (DIN EN 60715 TH35) in the
switch cabinet. The safety evaluation unit is fixed.
- Connect the safety evaluation unit.
- Ensure that first of all actuate the make contact and then the break contact
are actuated in the connected sensors.
If no external contactor is used:
- bypass terminals 12 and 13.
9
Electrical connection
- The electrical connection is only permitted in a voltage-free state.
- Ensure that the specifications described in the Technical specifications are
always complied with.
Upon connection of a sensor, the (+) and (-) sensor supply voltage must be
used by the terminals stated in the Technical specifications.
Terminal connections
See Technical specifications starting on page 9.
Art.-Nr./Art. No./Réf./N° art/N° art.: 900608
LED lights up
LED flashing
Safety evaluation
Serious fault
unit is ready for
operation
The feedback
Sensor correctly
contact of the
actuated. The
external contactor
feedback contact of
is closed
the external
contactor is open
Sensor correctly
Fault in the sensor
actuated
Version/Version/Version/Versione/Versión: 1.4
10 Commissioning
Danger of electrocution!
Ensure that the safety evaluation unit is only put into
operation by specially-trained authorized personnel.
Danger
- If an external contactor is connected:
Ensure that the connected external contactor is open.
- Actuate the sensor correctly.
- Apply the operating voltage.
After applying the operating voltage:
All LEDs light up.
The safety evaluation unit performs an internal test.
The safety evaluation unit checks whether the connected external contactor
has opened.
Upon successful completion of the test the safety evaluation unit switches
through the safety output.
The safety evaluation unit is ready for operation.
NOTE
Upon initial commissioning of a safety evaluation unit, complete validation
according to the relevant standards must be carried out.
11 Maintenance
The switching behaviour and sequences of every safety circuit must be
inspected at least once per year.
12 Troubleshooting
Restoring the device to a state of readiness for operation
If the safety outputs are switched off by a fault in the sensor and the LED
sensor flashes:
- Ensure that the feedback contact of the external contactor is closed or that
terminals 12 and 13 are bypassed.
- Set the faulty safety sensor to its non-actuated status and then actuate it
again (observe waiting period).
The LED sensor lights up again.
The safety evaluation unit switches through the safety outputs.
The safety outputs remain switched off:
- Replace the sensor.
Restore operational readiness, if the external contactor/
start LED is flashing
- Check the feedback contact of the external contactor or check the bypass at
terminals 12 and 13.
LED U
is flashing
B
- Apply the operating voltage again.
LED U
is still flashing:
B
- Replace the safety evaluation unit.
LED U
is not indicating operational readiness
B
- Check operating voltage.
- Check cabling.
Operating voltage and cabling are OK:
- Replace the safety evaluation unit.
13 Disposal
Dispose of packaging and used parts in accordance with the regulations of the
country in which the device is installed.
Datum/Date/Date/Data/Fecha: 26.06.2019
3/10
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