Function description
Operating Manual PNOZ mm0.1p
1002101-EN-04
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4 Function description
4.1 Integrated protection mechanisms
The relay conforms to the following safety criteria:
} The circuit is redundant with built-in self-monitoring.
} The safety function remains effective in the case of a component failure.
} 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 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 Diagnostics
The status and error messages displayed by the LEDs are saved in an error stack. This er-
ror stack can be shown on the display or can be read from the PNOZmulti Configurator via
the USB port.
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