Description

Elevator Permanent Magnetic Sensor YG-1 Brief introduction

• Solid-state Hall-effect chip, 5 V regulated or 12-24 V wide-range supply, < 8 mA current draw
• 2 mm repeatable accuracy over −25 °C to +85 °C, 5 kHz switching frequency (car speed ≤ 5 m/s)
• IP67 nickel-plated brass housing, 30 × 12 × 6 mm, M8 thread, supplied with two stainless nuts and lock-washers
• NPN open-collector (default) or PNP (jumper select), 100 mA sink/source, short-circuit and reverse-polarity protected
• 3-core PUR cable, 2 m long, oil-resistant, UL/CSA recognised, optional 5 m or 10 m on request
• Vane material: ferromagnetic steel ≥ 1.5 mm thick; optional aluminium vane with steel insert available for non-magnetic brackets
• Lifetime > 100 million operations, MTBF 300 000 h at full load, RoHS & REACH compliant

• KONE EcoDisc MX/MR governors and door zones
• Otis 3200/4200 Series car and counter-weight position channels
• Mitsubishi LEHY levelling and magnetic strip redundancy
• Generic shaft-top and pit access limit switch replacement when combined with vane
• Any controller that accepts 24 V sinking/sourcing pulse, 20 ms minimum duration

1. Place car on inspection mode; raise until floor door sill is level with car threshold.
2. Lock main breaker OFF; verify zero energy with a multimeter.
3. Clean the mounting face on the car cross-head; position the YG-1 so that the vane on the rail bracket will pass centrally through the slot with 2 mm ± 0.5 mm air gap.
4. Tighten M8 nut to 15 Nm; apply medium-strength thread locker to prevent loosening from vibration.
5. Route cable through existing PG gland; leave 100 mm service loop to avoid strain.
6. Wire brown to +24 V, blue to 0 V, black to controller digital input (PLC card or inverter DIA).
7. Restore power; run car on inspection past the vane. A green LED on the sensor head should blink once per passage; controller input LED must mirror the blink.
8. If pulse is inverted (high when vane absent), move jumper from NPN to PNP or swap input logic in software.
9. Repeat for each floor vane; verify cumulative counter increments by one per vane.
10. Record serial number and gap value in the maintenance logbook.

• Inspect every 6 months: look for cable cuts, kinks or oil swelling > 20 % diameter.
• Measure air gap: if vane rubbing has reduced the gap to < 0.8 mm, replace the sensor or relocate bracket—internal Hall cell may be cracked.
• LED test: LED must be visible in daylight; dim or absent LED usually means over-voltage transient (> 30 V) has damaged the chip.
• Functional test: oscilloscope or multimeter frequency mode should show clean 0-24 V square wave, rise time < 10 µs. Jitter or double-trigger indicates partial Hall failure—replace immediately.
• Environmental: if shaft floods, replace any sensor submerged > 30 min; water ingress eventually migrates through cable pores.

1. Never pry the sensor face with a screwdriver—hairline cracks allow moisture in and invalidate IP67.
2. Use only ferromagnetic vanes; stainless 304 or aluminium blanks will give weak or no pulse.
3. Route cable separate from 230 V motor leads; induced voltage can false-trigger the Hall cell.
4. When retrofitting to older relay logic, add a 470 µF capacitor across the input to stretch pulse to 100 ms if the PLC scan time is slow.
5. Store spares in original foil bag with desiccant; neodymium magnet inside the sensor can attract ferrous dust that scratches the Hall surface.