Reset Button/Input: Voltage Rating 24V DC/110V AC

Q: Why must reset buttons be manual rather than automatic?

Manual reset prevents automatic restart after safety stops, ensuring operators verify the fault cause is resolved and the area is safe before resuming operation, as required by safety standards like ISO 13850.

Q: Can this button be bypassed for testing purposes?

No, bypassing safety reset buttons violates safety standards and creates hazardous conditions. Testing should use authorized procedures without compromising safety functions.

Q: What maintenance does a reset button require?

Regular inspection for physical damage, cleaning of contacts (if accessible), and functional testing every 6 months or per machine safety plan. Replace if actuation force exceeds specifications or sealing is compromised.

Component Specifications

Definition

A safety-critical electromechanical component integrated into safety relay modules that requires deliberate manual actuation to reset safety circuits after a fault condition. It ensures machinery cannot restart automatically after safety stops, requiring operator intervention to confirm safe conditions before resuming operation.

Working Principle

When a safety fault occurs (e.g., emergency stop, guard door open), the safety relay locks out power. The reset button must be physically pressed to close a normally-open contact, sending a reset signal to the relay's logic circuit. This action verifies the fault condition is cleared and allows the relay to re-energize the safety circuit, but only if all other safety inputs (e.g., light curtains, interlocks) are in safe states.

Materials

Button: Polyamide 6.6 (PA66) housing with silicone seal (IP67 rating), stainless steel spring (AISI 304), silver-plated copper contacts. Mounting: Zinc-plated steel bracket. Actuator: Thermoplastic polyurethane (TPU) cap with tactile feedback.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Current Rating	2A
Voltage Rating	24V DC/110V AC
Actuation Force	5N ± 1N
Electrical Life	100,000 cycles at rated load
Mechanical Life	1,000,000 cycles
Travel Distance	4mm
Protection Rating	IP67
Contact Configuration	1NO (Normally Open)
Operating Temperature	-25°C to +70°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 13849-1, ISO 13850, IEC 60947-5-1, DIN EN 60204-1

Parent Products

This component is used in the following industrial products

Safety Relay Module

A specialized relay module designed to monitor safety devices and ensure machine operation stops when safety conditions are violated.

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Engineering Analysis

Risks & Mitigation

Accidental reset during maintenance causing unexpected startup
Worn contacts leading to intermittent reset signals
Environmental contamination (dust, moisture) affecting reliability
Unauthorized modification bypassing safety function

FMEA Triads

Trigger: Mechanical wear of spring or contacts
Failure: Button fails to make electrical contact when pressed
Mitigation: Use components rated for mechanical life exceeding application cycles; implement preventive replacement schedule

Trigger: Contaminant ingress due to damaged seal
Failure: Corrosion or short circuit preventing proper reset
Mitigation: Regular IP rating verification; use conformal coating on PCBs; install in protected enclosures

Trigger: Incorrect installation force or alignment
Failure: Button jams or requires excessive force, delaying emergency response
Mitigation: Follow torque specifications during mounting; use alignment guides; perform post-installation function test

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Actuation force: ±20% of nominal value; Contact resistance: <100mΩ after lifecycle; Dielectric strength: 1500V AC for 1 minute

Test Method

Functional testing per IEC 60947-5-1: Verify actuation force with force gauge, measure contact resistance with micro-ohmmeter, perform dielectric test with hipot tester, validate sealing with IP67 water/dust test.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Reset Button/Input

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Frequently Asked Questions

Why must reset buttons be manual rather than automatic?