Otis Bypass Activation Board
Otis Bypass Activation Board
Otis Bypass Activation Board

Otis Bypass Activation Board OMA4351ADX

Otis Escalator Bypass Activation Board OMA4351ADX From-Zhuye, Full Supply Chain For Otis, Kone, Schindler, Mitsubishi, Thyssenkrupp Elevator Lift  and Escalator All Brand Spare Parts

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Description

Otis  Bypass Activation Board OMA4351ADX Brief Introduction

Product     Name

Otis Escalator Bypass Activation Board
Model Number

 OMA4351ADX
 Quality
Original.Brand New
Payment
T/T. Paypal. Western Union
Delivery
3-5 Working Days 
Packaging
Packed by carton
Otis Bypass Activation Board OMA4351ADX – Setup, Operation & Replacement Guide
Nanjing Zhuye Elevator Parts – OEM stock, global shipping, 24/7 support
The OMA4351ADX is the factory-programmed bypass activation board that enables safe, code-compliant service access on every modern Otis Gen2® and SkyRise® controller. Mounted in the COP cabinet, it converts the mechanical bypass key-switch into SIL-2 digital signals, drives the “SERVICE” halo, logs activation time and still leaves spare I/O for inspection buttons. A single cracked relay or a dusty key-switch can trigger a “314” fault and lock the elevator in Phase-II recall. Nanjing Zhuye Elevator Parts keeps hundreds of factory-tested OMA4351ADX boards in Rotterdam and Nanjing so you can restore full bypass functionality the same day. Below is an 800-word field manual that explains correct usage, on-site programming and the replacement cycle that keeps your elevators serviceable, safe and code-compliant.

1. What the OMA4351ADX does

  • 24 Vdc key-switch input with debounce and 5 ms filter
  • Dual-channel SIL-2 relay output, 2 A, 250 Vac, force-guided contacts
  • RGB “SERVICE” halo, 120 cd/m², 170° viewing angle
  • On-board 5 Vdc buck, 2 A, short-circuit and thermal protected
  • IP42 ABS housing, 18 mm depth, key-hole slots for 30-second swap
  • UL/CE recognised to EN 81-20/50 and CSA B44.1 for 10-year design life

2. Tools to carry

  • Bypass board OMA4351ADX (Nanjing Zhuye part #OT-BYP-OMA4351ADX-SVC) in anti-static bag
  • 2 mm & 3 mm flat screwdrivers, TX10 Torx
  • Otis Service Tool (OST) laptop with Bypass plug-in licence
  • RJ-45 to M12 adapter cable (2 m, shielded)
  • IPA wipes and lint-free cloth
  • Lock-out / tag-out kit

3. Installation – 10 minutes if you label the wires

Safety: place the car on inspection, open the main disconnect and verify 0 V on the 24 Vdc rail.
  1. Photograph every J-connector – note J1 (24 V), J2 (CAN), J3 (key-switch), J4 (halo), J5 (relay).
  2. Depress the bezel latches and hinge the COP mask forward; store screws in magnetic tray.
  3. Slide the old board upward; it unhooks from the plastic dovetail.
  4. Clean the bezel and gasket with IPA; remove any glue residue.
  5. Fit the new OMA4351ADX: hook top edge first, press until latch clicks.
  6. Re-connect all plugs; tug-test each one.
  7. Apply power – STATUS LED blinks green 3 times then solid; halo shows “SERVICE”.
  8. Insert bypass key; confirm relay clicks and controller enters service mode.
  9. Record serial number, date and activation time in CMMS.

4. Functional test – prove it to the inspector

a) Key-switch debounce: <5 ms contact bounce.
b) Relay contact resistance: <0.1 Ω at 2 A test current.
c) Halo brightness: 120 cd/m² measured with lux meter.
d) Service mode entry: <100 ms from key turn to controller acknowledgement.
e) Export OST report and attach PDF to site file.

5. Preventive maintenance schedule

  • Monthly – visual sweep for cracked lenses or dark halos.
  • Quarterly – measure 24 Vdc ripple (<100 mV) and CAN-bus termination (60 Ω).
  • Annually – clean key-switch with IPA; inspect for carbon tracks from arcing.
  • Every two years – replace the anti-scratch lens film – keeps display crystal-clear.

6. Replacement cycle – traffic and vandalism decide

Otis specification: 10 years. Nanjing Zhuye analytics refine this:
  • Light duty (<150 starts/day, clean office): 12 years
  • Standard duty (150–400 starts, residential): 10 years
  • Heavy duty (>400 starts, hospital, mall): 8 years
  • High vandalism (school, station): 5 years – key-switch and lens crack under impact.
Replace immediately if:
  • Relay contact resistance >0.5 Ω – arcing pits
  • Halo brightness <50 % – LED chain degradation
  • CAN-bus error frame count >1 % – transceiver cracked by vibration
  • Housing cracks exposing live parts – safety violation

7. Eco-disposal & warranty

Return the old board in the recycling envelope; Nanjing Zhuye recovers gold, copper and ABS and issues a €5 recycling credit. Every OMA4351ADX ships with a 24-month replacement warranty, extendable to 60 months when you join our annual lens-replacement program.

8. Why buy from Nanjing Zhuye Elevator Parts

  • 3,000 units in stock, Rotterdam & Nanjing, ready for same-day courier
  • Factory-sealed Otis packaging with hologram – no grey-market clones
  • QR code on bag links to 90-second install video and relay test sheet
  • 24/7 technical hotline staffed by ex-Otis service engineers
  • Bundle pricing: buy 10 boards and get a free key-switch plus freight credit

9. Bottom line

A faulty bypass board is the fastest way to a locked-out elevator. Keep genuine OMA4351ADX units in every service kit, swap them in 10 minutes, and your elevators will stay serviceable, bright and compliant for the full 10-year design cycle. Order today from Nanjing Zhuye Elevator Parts – the fastest route from “bypass fault” to “perfect access.”
Otis Bypass Activation Board
Otis Bypass Activation Board

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