Product Overview
The Linear EXN-4M 620-100281 is a 4-door eMerge Elite expansion node in a locking metal cabinet. It adds four reader ports, eight inputs, and eight output relays to a supported eMerge Elite system from a separate expansion enclosure.
This model is commonly chosen when a project needs a durable metal cabinet and four-door expansion capacity but does not need a reader bundle included with the node. It is often used in access control closets, equipment rooms, commercial building expansions, and secured service areas.
EXN-4M should be matched against the project by enclosure type and included components. If readers are needed in the package, compare against the EXN-4MB bundle. If a compact enclosure is required, compare against EXN-4C or EXN-4CB.
Compatible With
- Supported Linear eMerge Elite / Elite-36 systems using EXN expansion nodes
- 4-door remote expansion applications where EXN-4M / 620-100281 is specified
- Sites needing four reader ports, eight inputs, and eight output relays in a locking metal cabinet
- Installations where readers are already specified or ordered separately
- Commercial buildings, secured closets, warehouses, equipment rooms, and remote door groups
- Related eMerge Elite EXN node family when matched by enclosure type, reader bundle, and license capacity
Features & Specifications
| Specification | Details |
|---|
| Manufacturer | Linear |
| Product Type | eMerge Elite EXN expansion node |
| Part Number | 620-100281 |
| Model | EXN-4M |
| Application | 4-door expansion node in metal cabinet |
| Reader Ports | 4 |
| Inputs | 8 |
| Output Relays | 8 |
| Included Readers | None indicated for EXN-4M |
| Enclosure | Locking metal cabinet with integrated tamper switch |
| Power Options | Optional PoE where supported by system design |
| Notes | Designed to install separately from the eMerge Elite-36 system enclosure |
Also Known As / Related Part Numbers
- 620-100281
- EXN-4M
- Linear EXN-4M
- eMerge Elite 4-Door EX Node Standard Cabinet
- 4-Door Expansion Node in Metal Enclosure
- Related: EXN-4MB, EXN-4C 620-100276, EXN-4CB 620-100277, ACM4D 620-100271, EL36-4CB 620-100296
Technician Note
EXN-4M is the metal cabinet node without the bundled readers. It is a good fit when the installation already specifies separate readers or needs a stronger enclosure, but it should not be assumed to include reader hardware.
Before Ordering
- Confirm the existing system supports EXN expansion nodes
- Confirm the job calls for a metal cabinet version
- Verify whether readers must be ordered separately
- Check network and power method at the node location
- Confirm door contacts, REX devices, relays, and lock power layout
- Verify license capacity for four added doors
Professional Advisory
Access control panels and expansion modules should be installed and serviced by qualified access control or low-voltage technicians. Do not bypass door position inputs, request-to-exit devices, locking hardware safety requirements, fire release requirements, or local code requirements.
Important Ordering Warnings
- EXN-4M does not indicate included readers
- Do not confuse EXN-4M with EXN-4MB, EXN-4C, or EXN-4CB
- Do not substitute for ACM4D unless the system layout supports a separate expansion node
Product Questions & Answers
Does EXN-4M include four readers?
No included reader bundle is indicated for EXN-4M. If readers are needed, verify the correct reader model or compare against a bundle version.
What type of enclosure does EXN-4M use?
It uses a locking metal cabinet with an integrated tamper switch.
How many doors can this node add?
It is a 4-door expansion node with 4 reader ports, 8 inputs, and 8 output relays.
Is this the same as EXN-4CB?
No. EXN-4CB is the compact cabinet bundle with readers. EXN-4M is the metal cabinet node without an indicated reader bundle.
What should be checked before ordering?
Check the eMerge Elite system family, license capacity, enclosure requirement, reader needs, network path, and power design.
