SES SCLRHD, SCMI SELECT CELLULAR MODULE INTERFACE IN STAINLESS STEEL HOUSING
The SES SCLRHD is the SCMI Select Cellular Module Interface in a stainless steel external enclosure. This cellular interface is used with compatible Select Engineered Systems CAT and TEC Series telephone entry systems to provide 4G / LTE cellular communication where a traditional analog phone line is unavailable, unreliable, or expensive to run.
The SCMI works as a cellular communication bridge for compatible SES telephone entry and access-control systems. When a visitor selects or dials a resident from a cellular CAT or TEC unit, the call is passed through the cellular network to the resident's phone. After speaking with the visitor, the resident can press the programmed open-door touch-tone command to activate the connected gate or door relay through the SES system.
The SCLRHD version is the stainless steel external enclosure option. It is typically selected for outdoor or more exposed installations where a heavier-duty enclosure is preferred. SES also offers the related SCLRPC version in a polycarbonate external housing. The correct version should be chosen based on the site environment, mounting location, enclosure preference, and installation layout.
What This Interface Does
The SCLRHD provides cellular network communication for compatible SES CAT and TEC Series telephone entry units. It is commonly used as a retrofit cellular conversion interface when the site is moving away from a POTS line or when trenching a new telephone line to the entry location is not practical.
In a typical application, the existing or new SES entry system remains the main telephone entry and access-control unit. The SCMI provides the cellular connection that allows the entry system to place calls to residents, tenants, property managers, or other programmed phone numbers through 4G / LTE service. The actual gate or door opening command still depends on the SES entry system relay wiring and programming.
Compatible With
The SES SCLRHD is intended for select SES CAT and TEC Series telephone entry and access-control systems where the SCMI cellular interface is supported. Compatibility should be verified by the existing SES model, firmware or board requirements, communication method, cellular carrier, SIM/service plan, power setup, and installation wiring.
- Select Engineered Systems CAT Series telephone entry and access-control units
- Select Engineered Systems TEC Series telephone entry systems
- Compatible CAT and TEC Series retrofit cellular conversion applications
- SES telephone entry systems that need 4G / LTE resident calling instead of a traditional analog phone line
- Sites where AT&T or T-Mobile cellular service is used through compatible SES cellular service options
- Multi-tenant residential, commercial, gated community, apartment, condominium, parking, and controlled-entry applications using compatible SES CAT or TEC systems
- Installations where a stainless steel external enclosure is preferred for the cellular interface equipment
Do not assume every SES entry panel can use this interface without verification. Confirm the CAT or TEC model, wiring, programming requirements, carrier availability, signal level, SIM/service plan, and whether an external antenna is required before ordering.
Not Intended For
- Standalone gate access without a compatible SES CAT or TEC system
- Replacing the CAT or TEC telephone entry head unit
- Replacing a gate opener motor, actuator, control board, receiver, or keypad
- Replacing a card reader, credential, or reader expansion module
- 911 emergency calling applications
- Sites without usable 4G / LTE cellular coverage from the selected carrier
- Direct replacement of non-SES cellular interfaces without confirming wiring, service, and programming compatibility
- Applications requiring the SCLRPC polycarbonate housing version instead of the stainless steel enclosure version
Important Ordering Warnings
- Cellular interface only: The SCLRHD is the SCMI cellular module interface in stainless steel housing. It is not a complete CAT or TEC telephone entry system.
- Verify SES compatibility: Confirm the existing CAT or TEC Series unit supports the SCMI cellular interface before ordering.
- Carrier service required: The SCMI requires compatible 4G / LTE cellular service. SES commonly references AT&T or T-Mobile service options for this platform.
- SIM and service setup matter: SES product information identifies a Micro SIM and 4G / LTE / VoLTE service. Confirm service activation and programming before installation.
- Signal strength matters: Poor cellular signal can cause failed calls, dropped audio, or unreliable programming. Check site signal before installation and consider an external antenna where needed.
- Not for 911 calls: SES product information states that this cellular device cannot be used for 911 calls.
Features & Specifications
| Feature / Specification | Details |
| Manufacturer | Select Engineered Systems / SES |
| Product Type | Cellular module interface / cellular router interface |
| Part Number | SCLRHD |
| Interface Name | SCMI - Select Cellular Module Interface |
| Housing | External stainless steel enclosure |
| Application | Cellular retrofit interface for compatible SES CAT and TEC Series telephone entry systems |
| Compatible System Type | Select SES CAT and TEC Series telephone entry / access-control units where SCMI support is confirmed |
| Cellular Service Type | 4G, LTE, VoLTE cellular service |
| Carrier References | AT&T or T-Mobile service options are commonly referenced by SES for this platform |
| SIM Type | Micro SIM, according to SES product information |
| Power Requirement | 12VDC only; transformer supplied according to SES product information |
| IP / Programming Note | Static IP cellular solution commonly referenced for SCMI retrofit applications; confirm current carrier/service configuration |
| Resident Call Function | Allows compatible CAT / TEC units to call residents through the cellular network; resident may grant access using the programmed open-door touch tone |
| External Antenna Option | CELLULAREXTANT 4G / LTE cellular signal booster external antenna is a related SES accessory where additional signal support is needed |
| Emergency Calling Limitation | SES product information states this cellular device cannot be used for 911 calls |
| Included Items | SCMI cellular module interface in stainless steel enclosure; verify transformer, antenna, SIM/service, manuals, keys, and mounting hardware against current supplier listing |
| Not Included | CAT or TEC entry system, gate operator, card readers, credentials, active cellular service, SIM/service plan unless separately listed, external antenna, wiring, surge protection, and mounting accessories unless separately listed |
| Important Notes | Verify SES model compatibility, cellular carrier, service activation, signal strength, SIM type, 12VDC power, programming requirements, and enclosure requirements before ordering |
Also Known As / Related Part Numbers
- SCLRHD
- SES SCLRHD
- SES SCMI SCLRHD
- SCMI SCLRHD
- SCMI Select Cellular Module Interface in Stainless Steel Housing
- Select Cellular Module Interface with Stainless Steel External Enclosure
- Select Cellular Module Interface Router
- SCMI Router
- SCMI Cellular Router
- SES Cellular Interface Router
- Select Engineered Systems SCLRHD
- Select Entry Systems SCLRHD
- SCLRPC, related SCMI version with polycarbonate external housing
- CELLULAREXTANT, related 4G / LTE cellular signal booster external antenna
- SCLATT2F, related AT&T cellular service option referenced by SES
- SCLTM2F, related T-Mobile cellular service option referenced by SES
- CAT / TEC cellular retrofit kit, common application description
Related Parts and Accessories
- SES SCLRPC SCMI cellular interface with polycarbonate external housing
- SES CELLULAREXTANT 4G / LTE cellular signal booster external antenna
- SES SCLATT2F AT&T cellular service option, where available
- SES SCLTM2F T-Mobile cellular service option, where available
- Compatible SES CAT Series telephone entry systems
- Compatible SES TEC Series telephone entry systems
- Surge protection, grounding, low-voltage wiring, and mounting hardware where required by the installation
Technician Note
The SCLRHD is a cellular interface for compatible SES telephone entry systems, not a complete entry system by itself. Before recommending it as a retrofit, confirm the existing CAT or TEC unit can support the SCMI, then check cellular signal strength at the actual mounting location. A strong signal at the office or driveway may not mean the signal is strong inside the enclosure or behind a wall.
For South Florida outdoor installations, the stainless steel enclosure is often preferred for durability, but the installation still needs proper weather sealing, grounding, surge protection, and antenna planning. If the signal is weak or the enclosure location is shielded, review the external antenna option before finalizing the job.
Before Ordering, Confirm
- Confirm the needed part number is SCLRHD.
- Confirm the existing system is a compatible SES CAT or TEC Series telephone entry unit.
- Confirm the site needs the stainless steel external enclosure version, not the SCLRPC polycarbonate enclosure version.
- Confirm cellular coverage at the actual mounting location.
- Confirm whether AT&T or T-Mobile service is preferred or required for the site.
- Confirm 4G / LTE / VoLTE service availability and activation requirements.
- Confirm the SIM type, service plan, static IP requirements, and programming method.
- Confirm the 12VDC power requirement and whether the transformer is included with the current package.
- Confirm whether the CELLULAREXTANT external antenna is needed for signal improvement.
- Confirm that the system will not be used for 911 emergency calling.
- Confirm grounding, surge protection, weather sealing, and low-voltage wiring requirements.
Professional Advisory
Cellular retrofit work for telephone entry systems requires proper low-voltage wiring, carrier service activation, SIM setup, signal testing, programming, surge protection, grounding, and communication testing. A qualified access-control or telephone-entry technician should handle the installation when the site includes multiple entrances, remote programming, existing CAT / TEC wiring, weak signal, or property-management call routing requirements.
Do not put the system into service until visitor calling, resident audio, touch-tone entry, remote programming if used, cellular signal level, power, and any external antenna setup have been tested. The access-control relay should only command a properly installed gate operator or door-control device through the correct input or relay interface.
Product Questions & Answers
What is the SES SCLRHD used for?
The SCLRHD is used as a cellular module interface for compatible SES CAT and TEC Series telephone entry systems. It allows those systems to place resident calls through 4G / LTE cellular service instead of a traditional landline.
What is the difference between SCLRHD and SCLRPC?
Both are SCMI Select Cellular Module Interface versions. The SCLRHD uses a stainless steel external enclosure, while the SCLRPC uses a polycarbonate external housing.
Can SCLRHD work as a standalone gate opener or entry system?
No. The SCLRHD is a cellular interface for compatible SES CAT and TEC systems. It does not replace the telephone entry unit, gate operator, card reader, keypad, or door hardware.
What cellular service does the SCMI use?
SES product information identifies the SCMI platform for 4G, LTE, and VoLTE cellular service, with AT&T and T-Mobile service options commonly referenced. Carrier availability and service setup should be confirmed before ordering.
Does the SCLRHD need an external antenna?
Not always. An external antenna may be needed when cellular signal is weak, the enclosure location is shielded, or the site needs better signal reliability. SES lists CELLULAREXTANT as a related 4G / LTE cellular signal booster external antenna.
Can this cellular device be used for 911 calls?
No. SES product information states that this cellular device cannot be used for 911 calls. It should be used for compatible telephone entry calling and access-control communication only.
