Linear EXN-4MB, 620-100282 eMerge Elite 4-Door EX Node Cabinet 4-Reader Bundle
The Linear EXN-4MB 620-100282 is a commercial eMerge Elite expansion node bundle built for access control jobs that need to add more controlled openings to an existing or planned eMerge Elite system. In the field, this type of cabinet is used when a property already has the main access control platform selected and the installer needs additional reader inputs, door inputs, and relay outputs for more doors, gates, or secured areas. It is not a simple keypad replacement and it is not a gate operator control board. It belongs in the access control side of the system, where it communicates with the eMerge platform and switches locks, gate operator inputs, or other access devices through the proper relay and low-voltage control wiring.
This bundle is commonly chosen for apartment, office, commercial, warehouse, and controlled facility projects where multiple entry points need card or prox-reader access. The cabinet format helps keep the board and terminations protected, while the tamper switch supports a cleaner security installation. Correct fitment depends on the existing eMerge system version, reader technology, power supply design, number of doors, lock type, and whether the project requires 12 VDC, 24 VDC, or PoE-supported wiring. For replacements, match the old cabinet and board label rather than ordering by appearance only.
Compatible With
- Linear / Nortek / Nice eMerge Elite access control systems
- eMerge Elite multi-door access control expansions requiring up to 4 additional doors and 4 reader locations
- Commercial door, gate, lobby, storage, tenant, and interior access control projects using compatible eMerge controllers
- Wiegand-style proximity reader applications when the system design supports the supplied P-300HA readers
- Systems using compatible electric strikes, magnetic locks, request-to-exit devices, door contacts, and output relay controlled gate operators
- Related eMerge expansion designs that may also reference EL36-4MB, EXN-2MB, ACM4DB, ACM4DB2, and ProxCard II components; verify system architecture before treating these as replacements
Features & Specifications
| Manufacturer | Linear / Nortek / Nice |
|---|
| Product Type | eMerge Elite expansion node cabinet bundle |
|---|
| Part Number | 620-100282 |
|---|
| Model | EXN-4MB |
|---|
| Application | Adds access control capacity for up to 4 doors / 4 readers in supported eMerge Elite systems |
|---|
| Included Components | 4 P-300HA proximity readers, 4 reader ports, 8 inputs, 8 output relays, locking metal cabinet, integrated tamper switch |
|---|
| Input Voltage | 12 VDC or 24 VDC system power; optional PoE support where the installation design allows |
|---|
| Compatible System Type | eMerge Elite access control |
|---|
| Enclosure | Standard locking steel cabinet |
|---|
| Notes | System design, reader format, power supply capacity, lock hardware, and controller compatibility must be verified before ordering |
|---|
Also Known As / Related Part Numbers
- 620-100282
- 620100282
- EXN-4MB
- EXN4MB
- eMerge Elite 4-Door 4-Reader Expansion Node
- eMerge Elite Expansion Node Bundle
- P-300HA reader bundle
- P300HA reader bundle
- Linear eMerge Elite EX Node
- Nortek / Linear / Nice eMerge access control expansion
- Related system references: EL36-4MB, EXN-2MB, ACM4DB, ACM4DB2, ProxCard II
Technician Note
This part should be selected from the access control riser, system layout, or original eMerge parts list. Similar eMerge cabinets and node bundles may look close but support different door counts, cabinet sizes, or system roles.
Before Ordering Checklist
- Confirm the existing system is eMerge Elite, not a different Linear access platform
- Match the door and reader count required by the job
- Confirm reader credential format and reader wiring requirements
- Verify lock power, relay load, request-to-exit, and door contact wiring
- Check whether the installation requires 12 VDC, 24 VDC, PoE, or a separate power supply design
- Confirm cabinet space, mounting location, and tamper wiring needs
Professional Advisory
Access control equipment should be installed and wired by a qualified access control or gate technician. Do not bypass fire egress, door release, monitored safety, or code-required life-safety devices.
Product Q&A
Is the EXN-4MB a complete standalone access control system?
No. The EXN-4MB is an expansion node bundle for supported eMerge Elite access control systems. It is used to add doors and reader locations to a compatible system design.
How many doors can this expansion bundle support?
This bundle is commonly used for up to 4 controlled doors with 4 reader locations, plus associated inputs and output relays for the access control hardware.
Are the P-300HA readers included with part number 620-100282?
Yes. The 620-100282 bundle is commonly listed with four P-300HA proximity readers, but the received package should always be checked against the packing list.
Can this be used with any gate operator?
It can control many gate operators through relay output wiring when the access control system, gate operator input, and safety system are properly designed. It is not a direct universal gate board replacement.
What should be checked before ordering this expansion node?
Confirm the existing eMerge platform, door count, reader format, cabinet space, power supply design, network/PoE plan, lock hardware, and whether the project requires a new controller or only an expansion node.
