The SUNS SN6173-SL-A (LS1) Elevator Hoistway Safety Limit Switch is an industrial-grade safety switch designed for reliable and precise operation in elevator hoistway applications. Featuring a rugged zinc die-cast housing, top roller lever actuator, and durable construction, this switch is engineered to deliver dependable performance in demanding elevator environments.
Designed as an EECO LS-1B compatible replacement, the SN6173-SL-A offers a practical solution for elevator maintenance, repair, and replacement applications.
Equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) contact, slow-action switching, and a 1/2-inch NPT conduit connection, this limit switch provides dependable mechanical positioning and electrical control.
Key Features
Zinc Die-Cast Body – Durable, corrosion-resistant housing for harsh environments.
Increased Wiring Space – Simplifies installation and maintenance.
Earth Grounding Surface – Same level as switching for enhanced safety.
Interchangeable Contact Block – Easy replacement and maintenance.
Fine Adjustment – Adjust switching point via precision screw.
Galvanically Separated Contacts – Electrical isolation for safety.
Screw Terminals with Self-Lifting Clamps – Simplifies wiring.
Positive Opening of NC Contacts – Reliable mechanical action.
4 x 90° Actuator Positions – Flexible mounting and operation.
Cable Entry Options – M20, PG13.5, and 1/2” NPT.
IP67 Protection – Dust-tight and waterproof for harsh environments.
EECO LS-1B Compatible
Technical Specifications
| Feature | Specification |
|---|
| Operating Speed | 0.05 mm – 2 m/sec |
| Operating Frequency | Mechanical: 120 ops/min; Electrical: 30 ops/min |
| Insulation Resistance | >100 MΩ @ 500V DC |
| Contact Resistance | <25 mΩ |
| Rated Current/Voltage | 10A / 600V AC (EN60947-5-1) |
| Electrical Rating | UL/cUL Listed (E216958) AC15 A600 / DC13 Q300 |
| Dielectric Strength | 1000 VAC, 1 min (between non-continuous terminals); 2500 VAC, 1 min (terminal to ground) |
| Service Life | Mechanical: 10,000,000 ops; Electrical: 500,000 ops |
| Operating Temperature | -25~80℃ (-13~176°F), no icing |
| Humidity | <95% RH |
| Weight | 400–480 g (metal body) |
| Degree of Protection | IP67 |
