18
English
ASO sensors must not be connected in parallel.
Figure 1: Connection at the coil core
SCE
CLOSING
movemen
t
SCE
OPENING
movemen
t
O
C
8. Connecting the sensors
8.1 Connecting to the coil core SPK 54
(figure 1)
9.2 Connecting multiple sensors per sensor circuit
(figure 2)
One or more sensors can be connected to sensor input
O
or
C
. For this purpose, the individual sensors are
connected in series according to figure 2.
Up to five sensors ma�� be connected in series, whereb�� the total cable length must not exceed 25 m.
The length of one sensor ma�� be up to 25 m.
Before connecting the sensors that are connected in series, it is recommended that the resistance value of
the arrangement be measured.
The resistance must be 8.2 kΩ ± 500 Ω when the SCE is inactive and must not exceed 500 Ω when it is active.
If a channel is not used, it must be connected to an 8,2 kΩ resistor.
resistor.
The travelling edges (SCE) are connected to the tra
-
velling coil core.
For this purpose, the travelling SCE
CLOSING
movement
is connected to connection
C
of the travelling coil core
and the optional SCE
OPENING
movement is connected
to connection
O
.
9. Commissioning / functional test
The gate s��stem must be tested for proper function after all of the electrical connections have been established
and the suppl�� voltage has been turned on. To do this, activate each of the safet�� contact edges one after
another and check the corresponding reactions of the switching unit.
Figure 2: Wiring of multiple sensors; in this example: safety contact edge
Sensor 1
Sensor 2
Sensor „n“
O
C
7.5 Connecting the control circuits
The control circuit to be monitored for the opening movement (stop-opening
movement) is to be connected to the
Stop Opening
terminal pair; for the closing
movement (stop closing movement), the appropriate control circuit is to be con
-
nected to the
Stop Closing terminal pair .
The connection for the control circuits is permitted onl�� for switching
low voltages.
The control circuits are dependent on the rated current
to protect with an appropriate fuse or the rated current to the control
circuits must be limited b�� other measures to the maximum value.
ISK 74-312 Inductive Safety Relay
74-312 Inductive Safety Relay
Inductive Safety Relay
Relay
2
2
2
2