Description
The OTIS GHA21270A1 is a Ring Car Board II (RCB-II) used in compatible Otis elevator control systems. It forms part of the Operational Control Sub-System (OCSS) and handles car-level and hall-call related control functions within the elevator controller architecture. Otis documentation specifically lists GHA21270A1 as an RCB-II board variant.
The RCB-II architecture is responsible for functions including processing car and hall calls, controlling tell-tale lights, hall lanterns and gongs, updating position indicators, determining operating modes, and coordinating group operations with other elevators.
🔑 Product Keywords: OTIS GHA21270A1, RCB-II, RCB2, Ring Car Board II, Ring Car Board, Otis Elevator Control Board, OCSS, Elevator Controller PCB, Otis 2002, Elevator Spare Part
For OTIS industrial and elevator automation spare parts, visit newplcdcs.com.
GHA21270A1
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | OTIS |
| Model | GHA21270A1 |
| Board Designation | RCB-II / RCB2 |
| Product Type | Ring Car Board II |
| System | Otis OCSS |
| Application | Elevator control system |
| Main Function | Car and hall call / operational control |
| Related Functions | Position indication, operating modes, group coordination |
| Board Category | Elevator control PCB |
| Compatible Architecture | Otis controller systems using RCB-II |
| Condition | Verify actual item condition |
⚙️ Application
The RCB-II is an important controller board within compatible Otis elevator systems. Its documented OCSS functions include processing car and hall calls, controlling indication and signaling devices, determining operating modes, and coordinating operation with other cars in a group.
Otis spare-parts documentation also identifies the RCB-II in controller and swing-panel assemblies, with different G-series part numbers used across various hardware vintages. GHA21270A1 is specifically listed as an RCB-II Ring Car Board variant.
Typical applications include:
- Otis elevator controller maintenance
- RCB-II board replacement
- OCSS control-system servicing
- Car and hall call processing
- Elevator position and operating-mode control
- Elevator group-operation systems
- Legacy Otis controller refurbishment
⚠️ Replacement Note: Match the complete GHA21270A1 part number and board revision when sourcing a replacement. Otis documentation lists multiple RCB-II variants, including GEA21270A1, GFA21270A1, GGA21270A1 and later GHA21270A3 versions. These should not automatically be treated as interchangeable without confirming the elevator controller configuration, EPROM/EEPROM arrangement, connectors, and software revision.
🔧 Related OTIS Models
- OTIS GEA21270A1
- OTIS GFA21270A1
- OTIS GGA21270A1
- OTIS GHA21270A3
- OTIS GHA21270A2
- OTIS GCA21270A1
- OTIS GCA21270A2
- OTIS GDA21270A3
- OTIS GEA21270A2
- OTIS GFA21270A2
