Wiring
Operating Manual PDP67 F 8DI ION PT
1004253-EN-02
17
6.3.4
Example: Dual-channel, failsafe input device, with test pulse
Features:
}
Depending on the application area and its respective regulations, this connection dia-
gram is suitable in accordance with EN ISO 13849-1
up to PL e
and EN IEC 62061
up
to SIL CL 3
.
}
The input device must be approved for failsafe applications.
}
This type of connection is mainly used for signal inputs with infrequent operation.
}
As the test pulses are permanently assigned to the inputs, all short circuits will be de-
tected, with the exception of short circuits that short out the input device (cable from the
test pulse to the input device and cable from the input device to the input).
Single-channel,
failsafe sensor
Test pulse T0
Test pulse T1
Test pulse T0
Test pulse T1
Fig.: Please ensure safety regulations and EMC guidelines are met!