Wiring
Operating Manual PDP67 F 8DI ION HP
1002225-EN-05
19
7.3.3
Example: Single-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 d
and EN IEC 62061
up
to SIL CL 2
.
}
The input device must be approved for failsafe applications.
}
Test pulses can be used to check the inputs for short circuit to 24 V and correct func-
tionality. Short circuits that short out the input device (cable from the test pulse to the in-
put device and cable from the input device to the input) will not be detected.
}
Please read the instructions provided with the input device.
}
Only input devices with N/C contacts can be tested.
CAUTION!
Short circuits between the cable to the input device and the 24 V line or
between cables to various input devices will not be detected.
Avoid short circuits by
– Appropriate wiring
– Wiring in accordance with the requirements of IEC 61076-2-101 and
IEC 60204-1, clause 14.1.1 and 14.1.2
