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
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.
-
Photograph every J-connector – note J1 (24 V), J2 (CAN), J3 (key-switch), J4 (halo), J5 (relay).
-
Depress the bezel latches and hinge the COP mask forward; store screws in magnetic tray.
-
Slide the old board upward; it unhooks from the plastic dovetail.
-
Clean the bezel and gasket with IPA; remove any glue residue.
-
Fit the new OMA4351ADX: hook top edge first, press until latch clicks.
-
Re-connect all plugs; tug-test each one.
-
Apply power – STATUS LED blinks green 3 times then solid; halo shows “SERVICE”.
-
Insert bypass key; confirm relay clicks and controller enters service mode.
-
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.
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.”
