Pilz PZE 9 Safety Relay Expansion Module

Pilz PZE 9 is a forced guide contact expansion module used for safety circuit expansion, providing 8 safety normally open contacts and 1 auxiliary normally closed contact. It supports a wide range of 24VDC/24~230VAC power supply and meets PL e/Cat.4/SIL3 safety levels. It realizes diagnosis and fault monitoring through the feedback loop of the basic unit, and has short-circuit/open circuit/ground fault protection. It is installed on DIN rails and suitable for industrial safety emergency stop, safety door and other circuit expansion, complying with international standards such as EN ISO 13849-1.

Basic Information and Security Standards

product attributes

Model: PZE 9, Safety Relay Contact Expansion Module

Standards: EN 60947-5-1, EN 60204-1, EN ISO 13849-1

Certification: CE, UKCA, CCC, T Ü V, cULus, EAC

Security Warning Level

DANGER: Immediate Fatal Risk

Warning: Serious Injury Risk

CAUTION: Minor injury/equipment damage

NOTICE: Equipment damage prompt

Compliant use

Contact extension for safety relays/safety systems only

Prohibition of modification and use beyond specifications

Installation and debugging must be carried out by professionals with professional qualifications

Core functions and structure

Contact configuration

Type Quantity Function

Safety contact (NO) 8-way execution safety cut-off, forced guidance

Auxiliary contact (NC) 1-channel status indication, non safety purpose

Work logic

Input closed → safety contact closed, auxiliary contact disconnected, CH1/CH2 light on

Input disconnected → contact redundancy disconnected, indicator light off

Fault status → Output power loss, contact disconnection

Fault protection

Input open circuit, short circuit, ground fault

Contact adhesion prevents restart

Abnormal monitoring of feedback loop

Electrical specifications (key models)

Power supply model

Order number, power supply type, voltage, power consumption

774150 DC 24VDC 3.5W

774140 AC 24VAC 7VA

774148 AC 230VAC 7VA

output capability

Safety contacts: AC1 240V/8A, DC1 24V/8A

Auxiliary contacts: AC1 240V/2A, DC1 24V/2A

Short circuit withstand: 1kA

Contact material: AgSnO ₂+gold plating

Installation and wiring

Installation method

35mm DIN rail installation, protection level IP40 (shell)

Control cabinet protection ≥ IP54

Wiring requirements

Wire diameter: 0.2~4mm ², torque 0.5Nm

The output front-end must be equipped with a fuse (safety contact 10A fast melting)

Prohibit using auxiliary contacts for safety circuits

EMC requirements

Separate wiring of control lines and power lines

Inductive loads require the installation of arc extinguishing devices

Status indication and maintenance

LED indicator

POWER: The power supply is normal

CH.1/CH.2: Corresponding channel contact closure

Fault: Fault alarm

maintenance cycle

PL e/SIL3: Check once a month

PL d/SIL2: Check once a year

Service life: 20 years (TM)

Safety characteristic parameters

Parameter values

Performance level PL e

Category Cat. 4

SIL SIL 3

PFH D 2.31×10⁻⁹ 1/h

PFD 2.03×10⁻⁶

Mechanical lifespan of 10000000 cycles

Key issues

Question 1: What are the core security levels and corresponding inspection cycles of PZE 9?

Answer: The core security level is PL e, Cat. 4, SIL 3; The inspection cycle requires PL e/SIL3 to be conducted once a month, and PL d/SIL2 to be conducted once a year.

Question 2: What are the key differences in the use of PZE 9’s 8-way safety contacts and 1-way auxiliary contacts?

Answer: The 8-way safety contact is a forced guiding structure that can be used to safely cut off circuits; One auxiliary contact is only used for status indication and is strictly prohibited from connecting to the safety circuit.

Question 3: What faults occur in PZE 9 that prevent it from restarting, and how to handle them?

Answer: Unable to restart when there is an input short circuit/open circuit/ground fault, or when the safety contact is stuck; The handling method is to eliminate external wiring faults, confirm that the contacts have been completely disconnected, and restart the basic unit.