Function description
Operating Manual PDP67 F 8DI ION PT
1004253-EN-02
10
4
Function description
4.1
Operation
The functions of the inputs and outputs are configured in the system software.
4.1.1
Inputs
Single and dual-channel sensors can be connected to the inputs, with or without test
pulses.
Input signals must show a “High” (“1” signal) of 15 VDC (+15 ... +30 VDC) and a “Low” (“0”
signal) of 0 VDC (-3 ... +5 VDC).
The input status is signalled to the control system via the bus.
Green LEDs indicate the status of the inputs.
Test pulses can be used to check the inputs for shorts across contacts and correct function-
ality.
4.1.2
Outputs
The outputs can be used as standard outputs, as test pulse outputs or as 24 VDC outputs.
The test pulse outputs are suitable for testing the sensor wiring. All safety-related inputs
must operate in accordance with the failsafe principle (on switching off).
Two test pulses are available on each plug-in connector; these test pulses are permanently
assigned to the inputs. The assignment of the test pulses to the inputs cannot be changed
in the system software's configurator.
If the test pulse outputs are not being used, they can be configured as standard outputs or
24 VDC outputs in the system software's configurator.
4.2
Data download
Communication with the control system is via a safe data link. Data is exchanged cyclically.
4.3
Diagnostics
The status and error messages shown by the LEDs are saved in an error stack. The sys-
tem software can read this error stack.