Function description
Operating Manual PNOZ m1p (ETH)
20878-EN-16
13
4 Function description
4.1 Integrated protection mechanisms
The relay meets the following safety requirements:
} The circuit is redundant with built-in self-monitoring.
} The safety device remains effective in the case of a component failure.
} The relay contacts meet the requirements for protective separation through increased
insulation compared with all other circuits in the safety system.
} The safety outputs are tested periodically using a disconnection test.
4.2 Functions
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 LEDs on the base unit and expansion modules indicate the status of the configurable
control system PNOZmulti.
The online help on the PNOZmulti Configurator contains descriptions of the operating
modes and all the functions of the control system, plus connection examples.
4.3 Block diagram
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