18
8. Electrical connection
Connection to the wrong terminals may damage the relay.
Wiring laid in the open or outside the control box must be properly protected.
The signal wiring may not be connected parallel to the motor wiring or other power wiring.
The limits shown in the “Technical Data” for the supply voltage and relay switching capacity must
be observed. Sufficient fuse protection must be provided on all output contacts with capacitive
and inductive loads.
8.1 Supply voltage
The supply voltage is to be connected to the terminal pair
8 9
24 V AC/DC. The supply wiring to the relay must
be protected by a suitable circuit breaker. The supply voltage must meet the requirements for low voltage
protection (SELV).
8.2
Sensor connection
Connect the sensor for Channel 1 to the terminal pair
3 11
. Connect the sensor for Channel 2 to the terminal
pair
3 10
.
If a channel is not used, it must be fitted with an 8.2 kΩ resistance.
8.3 Connecting multiple sensors per sensor circuit
ASO sensors must not be connected in parallel.
One or more sensors can be connected to sensor input . For this purpose, the individual sensors are connec-
ted in series according to figure 1.
Safety edges SENTIR edge:
Up to five SENTIR edge may be connected in series. The maximum total length oft the SENTIR edge shall
not exceed 100 m.
The length of one SENTIR edge may be up to 25 m .
The total cable length oft the in series connected SENTIR edge must not exceed 25 m.
Safety bumper SENTIR bumper:
Up to five SENTIR bumper may be connected in series. The maximum total length oft the SENTIR bumper
shall not exceed 15 m.
The length of one SENTIR bumper may be up to 3 m .
The total cable length oft the in series connected SENTIR bumper must not exceed 25 m.
Safety contact mat SENTIR mat:
Up to ten SENTIR mat may be connected in series. The maximum total area shall not exceed 10 m
2
.
The maximum size of an SENTIR mat is 1350 x 2350 mm. The total cable length oft the in series connected
SENTIR mat must not exceed 25 m.
Before connecting the sensors that are connected in series, it is recommended that the resistance value of
the arrangement is to be measured. The resistance must be 8.2 kΩ ± 500 Ω when the sensor is inactive and
must not exceed 500 Ω when it is active.
Safety Relay
English
Sensor „n“
Sensor 2
Sensor 1
Opening
Figure 1: Connection of multiple sensors; in this example: safety contact edge
2
2
2
2
