Function Description; Integrated Protection Mechanisms; Operation; System Reaction Time - Pilz PNOZ m B0 Operating Manua

Function description

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.
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The safety function remains effective in the case of a component failure.
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The safety outputs are tested periodically using a disconnection test.
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4.2

Operation

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
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 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
output in the system switching off is described in the document "System Expansion".
4.4

Block diagram

T0M20
Configurable
IM0
IM1
Operating Manual PNOZ m B0
1002660-EN-02
T2M22
O0 O1
T1M21 T3M23
output
Configurable
input/output
I4
IM2 IM16 IM18
IM3 IM17 IM19
O2 O3 24 V 0 V
24 V 0 V
Input
I10
I5 I6 I7 I8 I9 I11 I12 I13 I14 I15
A1 A2
=
=
Power
12