Pilz PNOZ m EF Multi Link - Manual (Page 10)

Function Description
Operating Manual PNOZ m EF Multi Link
1003018­EN­02 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 link module PNOZ m EF Multi Link is used to safely transfer the input information from
32 virtual inputs and 32 virtual outputs between two PNOZmulti systems. One link module
is assigned to each base unit. Data is exchanged cyclically.
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.
Data exchange:
} Data is exchanged cyclically.
} After the end of a PNOZmulti cycle, each base unit sends its output data to its link mod­
ule. This output data is immediately sent to the link module on the other base unit.
} At the same time, the base unit reads the input data from the link module.
Connection of multiple base units:
Any number of base units can be connected via link modules. Two link modules are re­
quired for a connection between two base units. However, only a maximum of 4 link mod­
ules may be connected to any one base unit.
Virtual inputs and outputs:
Inputs and outputs for both PNOZmulti systems are assigned in the PNOZmulti Configur­
ator. Inputs and outputs with the same number are assigned to each other, e.g. output o5
on one PNOZmulti system to input i5 on the other PNOZmulti system.