Description
Otis Elevator Door Interlock DO2000/DO3000 Brief Introduction
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Product Name |
Otis Elevator Door Interlock |
| Model Number |
DO2000/DO3000 |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Otis Elevator Door Interlock DO2000 / DO3000 – The Mechanical Sentinel That Keeps Every Door Locked | Nanjing Zhuye Elevator Parts
Every elevator ride ends with a click — the sound of the door interlock. The Otis DO2000 (side-opening) and DO3000 (centre-opening) interlocks are that final mechanical sentinel. Rated 10 A 250 VAC and SIL-2 certified, they guarantee that the car cannot move until every door is fully closed and electrically proven. When the latch slips or the contacts burn, the car refuses to run or — worse — drifts with doors ajar. Nanjing Zhuye Elevator Parts keeps genuine DO2000/DO3000 sets in OEM packaging, ready for next-day despatch worldwide — helping you restore absolute door safety without costly OEM delays.
Product snapshot
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Otis part numbers DO2000 (side) and DO3000 (centre), hardware rev. G5
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10 A 250 VAC, 2 × SPDT positive-opening contacts, gold-plated
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Stainless steel latch, PBT housing, IP65, −25 °C to +85 °C
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Mechanical life 3 million cycles, electrical life 100 k at 10 A 250 VAC
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Operating force ≤ 4 N, pre-travel 1.5 mm, over-travel 4 mm
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Mounting: car door leaf or frame, M8 studs, adjustable striker
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CE, UL, RoHS, REACH and Otis QES 2024 approved
Where it works
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Otis Gen2® Life, Gen2® Switch, 4200/5200 side or centre-opening doors
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Modernisation packages replacing obsolete DO1000 or cam-lock interlocks
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Any controller expecting SIL-2 mechanical proof of door closure
Installation method – 15-minute mechanical swap
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Place lift on inspection mode; open doors; switch OFF local breaker; lock & tag.
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Remove door cover; photograph old interlock wiring and striker position.
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Release M8 nuts; slide out old interlock; note shim thickness.
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Insert new DO2000/DO3000; shim until latch clicks at 1 mm before door seal.
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Torque M8 nuts to 25 Nm; apply thread-locker.
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Connect NC contacts in series with safety chain; NO contact for “door closed” feedback.
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Hand-close door; listen for click; multimeter must show safety chain closed.
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Run 10 manual open/close cycles; verify no missed clicks.
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Apply torque-stripe paint; log serial number and gap value in maintenance book.
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Return to normal mode; run 50 automatic cycles; verify no fault codes.
Replacement cycle & preventive maintenance
Otis bulletin SB-DO-2024-03 recommends:
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Visual inspection every 6 months: check latch wear, contact burn, striker alignment.
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Functional test every 12 months: contact resistance < 50 mΩ, operating force ≤ 4 N.
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Replace entire interlock every 1 million cycles or 5 years in high-traffic.
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Immediate replacement if:
– contact resistance > 100 mΩ,
– operating force > 6 N,
– housing cracked exposing live parts,
– missed clicks > 1 per 100 operations.
Pro tip: 70 % of premature failures are traced to misaligned striker—re-align every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Always use gold-plated contacts for 24 V DC; tin contacts oxidise and cause missed locks.
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Never grease the latch; dust turns into grinding paste.
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Keep a box of DO2000/DO3000 in every service van; at 120 g it costs less than one callback.
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After heavy cleaning, run 5 cycles and check latch engagement depth > 1.5 mm.
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Order the “Interlock Kit” (lock + striker + shim + torque tool) from Nanjing Zhuye Elevator Parts to eliminate parts hunting and ensure matched components.
Why buy from Nanjing Zhuye Elevator Parts?
We are an Otis-authorised distributor, importing DO2000/DO3000 directly from the Czech factory, gold-plating every contact and shipping with a 24-month replacement warranty. Stock is stored in humidity-controlled bins to prevent oxidation. Orders placed before 15:00 China time leave the same evening via DHL Express, arriving Europe or North America in 2–4 days. Bulk pricing starts at ten sets; we can laser-mark your asset number and include a spare striker free of charge.
Conclusion
The DO2000/DO3000 interlock is the silent sentinel that keeps every Otis door locked until the car is safe to move. By installing the genuine unit, aligning the striker correctly and replacing it before the latch cracks, you ensure every ride starts and ends with a confident click—every time, for the next 15 years. Stock genuine DO2000/DO3000 from Nanjing Zhuye Elevator Parts today—because when the lock stops, the lift stops.
