Pilz PNOZmulti Classic/Mini Safety Mini Controller

1. Product positioning and series division

PNOZmulti is a Pilz modular configurable safety controller, which falls between traditional safety relays and large safety PLCs, and is divided into two main series:

PNOZmulti Classic: Standard Edition, supports ≥ 4 security features, and has strong scalability

PNOZmulti Mini: Compact, supports ≥ 3 safety features, smaller size

The two modules are not interchangeable and both meet the highest level of mechanical safety.

2. System architecture and core principles

Structure: Basic unit+expansion module, jumper connection

Security architecture: Dual MCU cross monitoring, mandatory guidance relay/safety semiconductor output

Working mode: Software defined security logic, chip card storage program

Expansion method: Left side link/bus, right side I/O expansion

3. Hardware module system

(1) Classic Basic Unit

Model positioning features

PNOZ m0p basic model is non expandable, with 6 security features

PNOZ m1p universal extension supports up to 12 extension modules

PNOZ m2p press specifically supports cam, single stroke, and automatic mode

PNOZ m3p burner dedicated flame, air pressure, ignition, safety valve control

(2) Mini Unit

Model positioning features

Mm0p base compact non expandable

Mm0.1p extended support sigma output module

Mm0.2p multi machine link type with built-in Multi Link interface

(3) Expansion module

Input module:

PNOZ mi1p: 8-way secure input

PNOZ mi2p: 8-channel standard input

PNOZ ma1p: 2-channel analog input (voltage/current)

Output module:

Safe semiconductor: 4-channel x 2A, turn off delay of 30ms

Safety relay: 2/4 channels, turn off delay of 50ms

Link module:

Ml1p: Dual machine secure link

Ml2p: Up to 4 distributed PDP67 modules (IP67)

Speed monitoring:

Ms1p~ms4p: 1-2 axes, supports incremental/HTL/SinCos encoders

Fieldbus:

Profinet, EtherCAT, CANopen, Modbus TCP, CC Link, etc

4. Security performance (core level)

Highest security level:

PL e / Cat.4（EN ISO 13849-1）

SIL CL3（EN IEC 62061）

Typical PFH ᴰ: 2.90E-10

Task cycle: 20 years

Single channel: PL d/Cat.2/SIL2

Dual channel: PL e/Cat.4/SIL3

5. Software configuration system

Tool: PNOZmulti Configurator graphical drag and drop

Process: Select hardware → Draw logic → Define IO → Download to chip card

Features:

Macro Definition and Reuse

Multi level password protection

Multilingual interface

Diagnosis and simulation

6. Installation and wiring specifications

Installation: 35mm DIN rail horizontal installation, ventilation duct up and down

Distance:

Up and down: ≥ 30mm

Left and right: ≥ 20mm

Protection: Module IP20, installation cabinet ≥ IP54

Power supply: 24V DC, ripple ≤ 5%

Wiring: Spring/screw terminals, 0.25~2.5mm ² cable

Shielding: Analog/Communication Line Double End Shielding Grounding

7. System Expansion Rules

Classic scalability

Left side: 4 extensions+1 bus

Right side: 8 I/O modules

Distributed: Up to 16 PDP67 (IP67)

Mini expansion capability

Left side: 4 links+1 communication+1 bus

Right side: 1 sigma output module

8. Reaction time calculation

Maximum response time=input delay+output delay

Maximum input delay: 4ms

Semiconductor output: 30ms

Relay output: 50ms

Link module: Add 35ms

9. Diagnostic system

Panel LED: PWR/RUN/DIAG/FAULT

Error stack: Hardware/wiring/configuration/communication failure

Diagnostic words: status bits and fault codes

Bus: Upload diagnostics through Fieldbus

Visualization: Supports PASvisa system

10. Certification and Compliance

Universal: CE, UKCA, cULus, T Ü V

Standards: EN ISO 13849-1, EN IEC 62061, EN 61010-1

EMC：EN 61131-2、EN 55011

Key issues 

Question 1: What is the core difference between PNOZmulti Classic and Mini? What scenarios are suitable for each?

answer:

Classic: Strong scalability, up to 12 expansion modules, supporting analog quantity, multi axis speed monitoring, and press/burner specific functions, suitable for complex equipment, multiple safety points, and high expansion requirements.

Mini: Small size, minimal expansion (up to 1 output module), lower cost, suitable for small single machine, compact devices, and simple scenarios with 3-6 safety functions.

Question 2: How does the system achieve the highest security level PL e/Cat.4/SIL CL3? What are the key hardware designs?

answer:

The core relies on a dual channel architecture: dual MCU mutual monitoring+dual channel input+redundant safety output.

Key hardware:

Dual CPU cross detection, single CPU failure does not affect safety

Forced directional relay/safety semiconductor output

Input short circuit detection, output cross monitoring

Independent power supply and grounding design

Question 3: How to calculate the reaction time of PNOZmulti system? What is the total latency of a typical configuration?

answer:

Calculation formula: Total t=Maximum input delay+Maximum output shutdown delay

Typical example: Basic unit input+secure semiconductor output

Input delay: 4ms

Output delay: 30ms

Total reaction time: 34ms