Pilz PNOZ m EF 4DI4DOR - Manual (Page 10)

Function description
Operating Manual PNOZ m EF 4DI4DOR
1002702­EN­02 10
4 Function description
4.1 Integrated protection mechanisms
The relay conforms to the following safety criteria:
} The circuit is redundant with built­in self­monitoring.
} The safety function remains effective in the case of a component failure.
4.2 Functions
The expansion module provides additional inputs and additional relay outputs.
The function of the inputs and outputs on the control system depends on the safety circuit
created using the PNOZmulti Configurator. A chip card is used to download the safety cir­
cuit 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.
4.3 System reaction time
Calculation of the maximum reaction time between an input switching off and a linked out­
put in the system switching off is described in the document "System Expansion".
4.4 Block diagram
O0 O1
13 23
14 24
O2 O3
33 43
34 44
Input
I1 I0 I3 I2
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