PILZ PNOZ 110VAC 3S 1O SAFETY RELAY

What is the PILZ PNOZ 110VAC 3S 1O Safety Relay?

The PILZ PNOZ series of safety relays is well-known in the industrial automation industry for providing high-performance safety relays. The PNOZ 110VAC 3S 1O model is designed specifically to detect emergency stop circuits and safety gates. It runs on a 110VAC power supply and offers three normally open (NO) contacts and one normally closed (NC) contact, hence the “3S 1O” in its designation.

These contact arrangements enable flexible design of safety circuits to ensure robust control in accordance with demanding safety standards like EN ISO 13849-1 and IEC 62061.

Features of PILZ PNOZ 110VAC 3S 1O Safety Relay

Power Supply: 110VAC

Contacts: 3 safe outputs (NO), 1 auxiliary output (NC)

Function: E-Stop monitoring, safety gates, light curtains

Compact Design: DIN rail mounting housing saving space

LED Indicators: Fast diagnostics using front-panel LEDs

Robust Construction: Designed for high switching cycles and longevity

Safety Regulations: SIL CL 3 / PL e / Category 4 compliant

Simple Wiring: Screw terminals or spring clamp connections

Flexibility: Compatible with both single-channel and double-channel inputs

How the PILZ PNOZ 110VAC 3S 1O Relay Operates

This relay serves as an interface between safety devices (such as E-stops, guards, and interlocks) and the control system of the machine. When a safety device is triggered—such as when an emergency stop is activated—the relay de-energizes its output contacts, shutting off power to the machine and providing a controlled shutdown.

Under normal operation, the relay checks the circuit for continuity, and when the safety input conditions are satisfied, the relay re-energizes to restore machine operation.

It is particularly valuable in dual-channel applications where redundancy is needed to achieve higher levels of safety.

Applications

This safety relay has applications in many industries where machine control and personnel safety need to go hand-in-hand. Some examples include:

1. Automotive Assembly Lines
Utilized to control automated machinery and robotic arms, ensuring emergency stop functions are properly controlled.

2. Packaging Machinery
Monitors safety doors and emergency stops to avoid accidental injury while operating the machine.

3. CNC and Metalworking Machines
Prevents safe stoppage of drills, lathes, or cutting machines when safety guards are opened.

4. Conveyor and Handling Systems
Ceases motion immediately in the event of an emergency signal from sensors or operators.

5. Pharmaceutical and Food Processing Plants
Complies with stringent safety standards while minimizing downtime.

Why Choose the PILZ PNOZ 110VAC 3S 1O?

That’s why industrial engineers and automation professionals keep relying on this model:

Time-Tested Reliability: PILZ is renowned for its reliable safety components.

Conformity: Conforms to international safety standards such as EN 60204-1.

Seamless Integration: Miniaturized construction and easy-to-wire design cut installation time short.

Long Service Life: Engineered to endure harsh industrial environments.

Transparency in Diagnosis: LED lighting facilitates easy diagnosis.