Function description
Operating Manual PNOZ mo5p
1001353-EN-05
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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 relay contacts meet the requirements for protective separation through increased
insulation compared with all other circuits in the safety system.
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A defective relay contact will be detected during switching.
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The relays are diverse in design.
4.2
Operation
The expansion module provides additional relay outputs.
The function of the outputs on the safety system depends on the safety circuit created us-
ing the PNOZmulti Configurator. A chip card is used to download the safety circuit 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 safety 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 "PNOZmulti System Expan-
sion".
4.4
Block diagram
Interface
to pr
evious
module
Interface
to next
module
O0
O1
13
23
14
24
O2
O3
33
43
34
44