10
Relay
English
6.4 Connecting multiple sensors per sensor circuit
It’s not allowed to connect ASO-sensors in parallel.
One or more sensors can be connected to sensor input X1 X2. For this purpose, the individual sensors are
connected in series according to figure 3.
Safety contact edge
SENTIR edge
:
Up to five SENTIR edges may be connected in series. The maximum total length oft the SENTIR edges 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 edges must not exceed 25 m.
Safety contact 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 mats 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
mats 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.
7.
Fault diagnostic / Troubleshooting
Only the green
Power
LED should light up with the correct wiring and switching-on of the voltage supply. If
the red LED lights up then there is an error in the system which can be localized by the LED
If the fault is not in the wiring, verify the function of the electronics by applying an 8.2 kΩ resistor to the
X1
X2
input of the safety relay. If the electronics work correctly, thereafter, the PSS must be checked by using a
resistor measuring instrument (Ohmmeter). For this, the connection between the safety relay and the PSS
must be disconnected, and the PSS must be connected to the measuring instrument. The resistor value must
be 8.2 kΩ ±500 Ω for a not operated PSS, and in the operated condition the value should not exceed 500 Ω.
LED
Fault
Fault rectification
LED‘s do not light up
Supply voltage is failing, too low or
wrongly connected
Verify the connections and the supply
voltage:
Connect 24 V AC/DC at clamps 24 V AC/DC
Tolerance range: ±10%
LED
Actuate
lights up
Connecting cable of the PSS or the
PSS itselfs is faulty
Verify the connections, the wiring
and the connecting cables of the PSS
(crushed cables, brittle cables etc.).
Verify the PSS*
*
fig. 3 Interconnection of several SENTIR edges as an example
Sensor 1
Sensor 2
Sensor „n“
X1
X2
2
2
2
2
