Function description
Operating Manual PNOZ m EF 8DI2DOT
1004649-EN-03
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4
Function description
4.1
Integrated protection mechanisms
The relay meets the following safety requirements:
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The circuit is redundant with built-in self-monitoring.
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The safety device remains effective in the case of a component failure.
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The safety outputs are tested periodically using a disconnection test.
4.2
Functions
The expansion module provides additional inputs and dual-pole semiconductor outputs.
The function of the inputs and outputs on the control system depends on the user program
created using the PNOZmulti Configurator. The user program is downloaded from the
PNOZmulti Configurator to the base unit. The base unit has 2 microcontrollers that monitor
each other. They evaluate the input circuits on the base unit and expansion modules and
switch the outputs on the base unit and expansion modules accordingly.
The online help on the PNOZmulti Configurator contains descriptions of the operating
modes and all the functions of the PNOZmulti control system, plus connection examples.
4.2.1
Inputs
The expansion module provides 8 inputs.
Features
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Each input can be used to evaluate run monitoring for press applications.
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Each input can be configured for pulse detection for run monitoring.
– The pulse width has to be a least 1 ms for reliable pulse detection.
– When pulse detection is active, the functions pulse suppression and detection of
shorts across contacts are deactivated via the test pulses.
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In PNOZmulti Configurator the pulse suppression time can be changed for the inputs. A
change of the preset pulse suppression time (see
Technical details [
22]
) can be
used to suppress the self-monitored outputs and for interference suppression.
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For detection of shorts across contacts of the inputs:
– In the main program the inputs can be connected with the test pulses of the base unit.
– In the module program the inputs can be connected to the test pulses of the expan-
sion module.
