Description

Introduction to Elevator Pit Emergency Stop Switch PIT-EM-BOX

The Elevator Pit Emergency Stop Switch PIT-EM-BOX is a life-safety device engineered to provide an immediate and fail-safe means of shutting down elevator movement from the lowest point of the hoistway. Manufactured by NANJING ZHUYE ELEVATOR PARTS, a leading supplier of premium elevator components, this switch is designed for both new installations and modernization projects where compliance with EN 81-20/50, ASME A17.1 and GB 7588 is mandatory.

Technical Specifications

• Model: PIT-EM-BOX
• Rated Voltage: 250 V AC / 110 V DC
• Rated Current: 10 A resistive, 6 A inductive
• Contact Configuration: 1 NC + 1 NO snap-action, positively opened
• Ingress Protection: IP67 (dust-tight, protected against temporary immersion)
• Operating Temperature: ‑25 °C to +70 °C
• Cable Entry: M20 × 1.5 gland, Ø 6–12 mm cable range
• Mechanical Life: ≥ 1 million cycles
• Actuation Force: ≤ 35 N for easy manual operation
• Mounting: Surface-mounted stainless-steel bracket with four M6 threaded inserts
• Certifications: CE, UL, CSA, CCC

Features

1. Immediate Emergency Shutdown
The PIT-EM-BOX instantly interrupts the safety chain when the red mushroom head is pressed or the pull-cord is actuated, bringing the car and counterweight to a controlled stop regardless of controller state.

2. Tamper-Resistant Construction
A lockable transparent polycarbonate cover prevents accidental reset or malicious interference while allowing visual inspection. The cover is UV-stabilised to maintain clarity over decades of pit exposure.

3. Rugged Environmental Design
The IP67 die-cast aluminum enclosure withstands water jets, oil vapours and extreme temperatures encountered in elevator pits, ensuring reliable operation even after prolonged submersion during flooding.

4. Dual-Contact Reliability
Gold-plated bifurcated contacts guarantee low contact resistance (< 30 mΩ) and resist corrosion, providing positive break indication to the controller and remote monitoring systems.

5. Integrated LED Status Indicator
A bi-colour LED (green/red) on the lid gives at-a-glance confirmation of circuit integrity, reducing diagnostic time during routine inspections.

6. Energy-Efficient Operation
With virtually zero power consumption in standby mode, the switch contributes to the overall energy efficiency of the elevator system.

7. Maintenance-Friendly Installation
Pre-wired flying leads and a colour-coded terminal diagram allow technicians to install or replace the unit in under ten minutes, minimising hoistway downtime.

Applications

The PIT-EM-BOX is suitable for traction and hydraulic elevators in:
• High-rise residential towers
• Commercial office buildings
• Shopping malls and airports
• Industrial freight lifts
• Healthcare and aged-care facilities

After-Sales Service

NANJING ZHUYE ELEVATOR PARTS provides 24/7 technical support, on-site commissioning assistance, and a comprehensive five-year warranty. Our global spares network ensures replacement units are available within 48 hours anywhere in the world.

Conclusion

By integrating the PIT-EM-BOX into your elevator safety circuit, you gain a rugged, code-compliant emergency stop solution backed by NANJING ZHUYE ELEVATOR PARTS’ reputation for quality and innovation. This switch safeguards passengers and technicians alike while reducing maintenance costs and liability risks.