PNOZ S5 PILZ

PNOZ S5 PILZ Safety Relays

Brand：PILZ Model number：PNOZ S5

Country of origin: Germany Product weight：0.55kg

HS code：9032899099

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Product Details：

Product Dimensions：

The PNOZ s5 serves as a core control element in safety circuits where a machine must not stop instantaneously but rather after a controlled deceleration phase, or where a specific sequence of safe operations is required. It features a micro-processor controlled architecture with redundant internal relays to ensure high-level functional safety. The front panel includes a rotary knob and a digital display that allows users to precisely set the delay time. It can function as a standalone safety device or be used in conjunction with expansion modules from the PNOZsigma range to increase the number of safety contacts.

Product Parameters

Supply Voltage: $24 \text{ VDC}$ (with an operating range of $19.2 \text{ VDC}$ to $28.8 \text{ VDC}$ ).
Power Consumption: Approximately $3.5 \text{ W}$ .
Safety Contacts (Instantaneous): 2 Normally Open (NO) safety outputs.
Safety Contacts (Time-Delayed): 2 Normally Open (NO) safety outputs with an adjustable delay.
Time Delay Range: Adjustable from $0.04 \text{ seconds}$ up to $300 \text{ seconds}$ depending on the configuration mode.
Auxiliary Contacts: 1 Normally Closed (NC) semiconductor diagnostic output.
Terminal Type: Available with standard screw terminals or spring-loaded push-in terminals.
Safety Performance Level: Achieves up to Category 4, Performance Level (PL) e according to EN ISO 13849-1.
Safety Integrity Level: Capable of reaching SIL CL 3 according to EN IEC 62061.
Dimensions: Width $22.5 \text{ mm}$ , Height $98 \text{ mm}$ , Depth $120 \text{ mm}$ .

Product Advantages

A key advantage of the PNOZ s5 is its Adjustable Time-Delay Feature, which permits a controlled stop (Stop Category 1) rather than an abrupt power cut, protecting expensive machinery and mechanical components from sudden stress. The Ultra-Compact Housing of only $22.5 \text{ mm}$ width significantly reduces the space needed in the control panel.

The Digital Display and Diagnostics on the front panel allow for error codes and remaining time-delays to be viewed directly, speeding up commissioning and troubleshooting. Additionally, the High Flexibility of the device means it can automatically detect the operating mode (such as manual or automatic reset) based on how the wiring loops are configured, minimizing the need for multiple stocking variants.

Important Considerations and Precautions

When wiring and configuring the PNOZ s5, you must strictly calculate and verify the Required Time Delay according to your machine's risk assessment; setting a delay time that is too long could keep operators exposed to dangerous overlapping hazards. Always ensure that the Feedback Loop (Y1-Y2) is properly closed before attempting to reset the unit, as the relay will lock out if it detects a welded contact on an external contactor.

The unit is rated at IP20 Protection, meaning it must be installed inside a clean, dry control cabinet to prevent dust and humidity from interfering with the internal electronics. When utilizing the time-delayed contacts, remember that if the $24 \text{ VDC}$ supply power is completely lost, the time-delay function will drop out instantaneously as a failsafe mechanism, resulting in a Stop Category 0 action rather than a timed sequence.

Product Applications

The PNOZ s5 is utilized in automated systems where an immediate stop could cause machine damage or create secondary hazards.

Robotic Work Cells: Delaying the unlocking of a safety gate until the robot has completely decelerated to a safe standalone position.
High-Inertia Machinery: Controlling industrial centrifuges, large fans, or flywheels that require several seconds to coast to a stop after an E-stop is pressed.
Packaging and Bottling Lines: Synchronizing the shutdown sequence of successive conveyor belts to prevent materials from piling up or jamming.
Woodworking and Textile Machines: Ensuring that cutting blades or spinning spools have come to a total halt before access guards can be opened.
Material Handling and Cranes: Managing safe stopping profiles on transfer carriages and automated guided vehicles (AGVs).

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