Pilz PNOZ m B0 - Manual (Page 12)

Function description
Operating Manual PNOZ m B0
1002660­EN­03 12
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.
} 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 "System Expansion".
4.4 Block diagram
=
Power
A1 A2
=
Input
Configurable
output
24 V 0 V
24 V 0 V T1M21 O2 O0 O1 O3
IM1
I8 I5 I11 I4 I9 I12 I13 I14 I15 I7 I6 I10 IM2 IM0
IM3
IM16 IM18
IM17 IM19
Interface extension
module
USB
Interface extension
module
Configurable
input/output
T2M22
T3M23
T0M20