Select Entry Systems SG3DMCL Cellular Select Gate 4G VoLTE Entry System Details
The Select Entry Systems SG3DMCL is a Cellular Select Gate entry and access control system designed for gated residential, commercial, and multi-user access points where a traditional phone line is not being used. It combines a built-in keypad, call button, speaker, microphone, cellular antenna, SMS control, mobile app support, touch-tone gate release, Caller ID access, and relay output for connection to a compatible gate operator or access control input.
This is not just a simple keypad. The SG3DMCL is part of the Select Entry Systems Cellular Select Gate family and should be matched carefully by model number, cellular service requirements, relay needs, mounting location, and optional accessory requirements before ordering.
What This System Does
The SG3DMCL allows authorized users to control a gate through several access methods, depending on how the system is installed and programmed. Common functions include calling programmed phone numbers from the entry station, allowing entry by touch-tone command, opening the gate by SMS text or mobile app command, using keypad PIN access, recognizing approved Caller ID numbers, and supporting card access through a compatible 26-bit Wiegand input.
- Provides cellular-based gate entry without a landline at the gate.
- Allows visitors to call assigned phone numbers from the entry station.
- Allows gate control by SMS text, mobile app command, keypad, and remote touch tones when properly configured.
- Supports up to 10 phone numbers dialed from the keypad.
- Supports up to 1000 Caller ID recognizable phone numbers.
- Supports up to 2000 mix-and-match PINs, cards, or transmitters when the correct accessories and programming are used.
- Includes two Form C dry-contact relay outputs for compatible access control or gate operator inputs.
Compatible With
The SG3DMCL may be used with select gate operators and access control installations that accept a low-voltage dry-contact command from an entry system relay. It is not tied to one gate operator brand, but the operator must have the correct external control input and the installer must wire the relay output properly.
- Compatible with select gate operators that accept dry-contact open, close, step, or access control inputs.
- Compatible with active 4G LTE / VoLTE cellular service when the SIM card supports talk and SMS text service.
- Commonly used in gate entry applications where a cellular visitor call station is needed.
- May be used with compatible 26-bit Wiegand card readers for card access.
- May be used with keypad PIN access and Caller ID access after proper programming.
- May be mounted to a suitable surface or compatible pedestal, depending on site layout.
Important Compatibility Warning
Do not order the SG3DMCL by appearance alone. The SG3DMCL, SG2CL, and SG3DMRCL are related Cellular Select Gate models, but they are not automatic substitutes. The SG3DMRCL is commonly associated with RF receiver capability for SelectPass transmitters, while the SG3DMCL should not be assumed to include the same RF receiver package unless the current supplier configuration confirms it.
Cellular service is also a major compatibility item. This unit requires an active 4G LTE / VoLTE SIM with talk and SMS text service. A data-only SIM is not suitable. Cellular signal should be checked at the gate location before installation. If signal is weak, an alternate mounting location or approved antenna extension may be required.
Comparison With Similar Select Gate Models
- SG3DMCL: Cellular Select Gate entry system with larger SG3-style enclosure, keypad, call station features, cellular access, Wiegand input, and dry-contact relay outputs.
- SG3DMRCL: Related SG3 Cellular Select Gate version commonly associated with plug-in RF receiver capability for SelectPass transmitters. Confirm if your application needs transmitter access.
- SG2CL: Related Cellular Select Gate model with different enclosure dimensions and configuration. Do not substitute without confirming layout, mounting, and feature requirements.
Similar Parts That Are Not Automatically Interchangeable
- SG2CL cellular units with different enclosure sizing or site layout requirements.
- SG3DMRCL units when RF receiver capability is required.
- Older Select Gate cellular units that were designed around earlier cellular networks.
- Standard non-cellular Select Gate entry systems that require a phone line or different communication method.
- Other telephone entry systems that may look similar but use different boards, wiring, programming, SIM service, or accessories.
Not Intended For
- Data-only SIM plans.
- Locations without usable 4G LTE / VoLTE cellular signal at the gate.
- Direct connection to AC mains voltage inside the entry system enclosure.
- Direct switching of high-voltage gate motor loads.
- Bypassing gate safety devices, photo eyes, safety edges, fire access, emergency access, or operator safety circuits.
- Use as a 911 emergency phone. This cellular device is not intended for 911 calling.
- Replacing SG2CL, SG3DMRCL, or older Select Gate units without confirming model-specific requirements.
Features and Specifications
| Specification |
SG3DMCL Details |
| Brand |
Select Entry Systems / Select Engineered Systems |
| Part Number |
SG3DMCL |
| Product Type |
Cellular Select Gate entry and access control system |
| Cellular Technology |
4G LTE / VoLTE cellular service with active talk and SMS text service |
| Control Methods |
SMS text, Select Gate mobile app, keypad, remote touch tones, Caller ID, and compatible Wiegand card access |
| Phone Number Capacity |
10 phone numbers dialed by keypad |
| Caller ID Capacity |
Up to 1000 recognizable Caller ID phone numbers |
| PIN / Card / Transmitter Capacity |
Up to 2000 mix-and-match PINs, cards, or transmitters when properly configured |
| Wiegand Input |
Built-in 26-bit Wiegand input for compatible card access |
| Relay Outputs |
Two Form C dry-contact relay outputs, rated 24 V at 3 amps |
| Auxiliary Relay |
Board revision dependent; auxiliary relay support should be confirmed before ordering or wiring |
| Power Input |
12-24 VDC only; 12 VDC 2A DC transformer commonly shown as supplied |
| Current Draw |
Approximately 90 mA at 12 VDC or 80 mA at 24 VDC |
| Mounting |
Surface or pedestal mount |
| Approximate Dimensions |
7 in H x 10 in W x 6 in D |
| Construction |
Painted aluminum back box with stainless steel face plate |
| Operating Environment |
-20 F to +140 F, 5 percent to 95 percent relative humidity, non-condensing |
| Approximate Shipping Weight |
Approximately 15 lb for SG3DMCL unit only; final shipping weight may vary by package configuration |
Also Known As / Related Part Numbers
- SG3DMCL
- Cellular Select Gate Entry System
- Select Gate SG3DMCL
- 4G LTE / VoLTE Cellular Select Gate
- CSG SG3DMCL
- SG2CL - related model, not an automatic substitute
- SG3DMRCL - related model with RF receiver considerations, not an automatic substitute
- SGMC Mobile App - related app control method
- CELLULAREXTANT - related antenna extension reference; confirm availability and fitment
Related Parts and Service Checks
- Confirm the active SIM card has talk and SMS text service, not data-only service.
- Check cellular signal strength at the exact gate location before mounting the unit.
- Confirm the gate operator has an available dry-contact access control input.
- Verify whether the installation needs one relay or two relay outputs.
- Confirm whether card reader, transmitter, antenna extension, pedestal, or RF receiver accessories are required.
- Confirm whether the supplied transformer, SIM card, antenna, and documentation are included in the current package.
- Inspect grounding, wet-location wiring, conduit path, and surge exposure before installation.
Technician Note
From a service counter standpoint, the biggest SG3DMCL ordering mistakes are usually cellular service assumptions, SG3DMCL versus SG3DMRCL confusion, and expecting the entry system to work at a weak-signal gate location. Verify the carrier, SIM plan, signal strength, relay wiring, and model suffix before the box is opened and mounted.
Before Ordering Checklist
- Confirm the exact part number is SG3DMCL.
- Confirm the job does not require SG3DMRCL or another Select Gate model.
- Confirm 4G LTE / VoLTE service is available at the installation location.
- Confirm the SIM supports voice talk and SMS text service.
- Confirm whether the package includes the current SIM card type and 12 VDC 2A transformer.
- Confirm surface mount or pedestal mount requirements.
- Confirm Wiegand reader, card, transmitter, RF receiver, or antenna extension requirements.
- Confirm the gate operator input is compatible with a dry-contact relay command.
Installation and Service Notes
The SG3DMCL should be installed by a qualified access control or gate technician. Use only the proper low-voltage DC power input specified for the unit. Do not bring AC mains voltage into the entry system enclosure, do not use the supplied transformer to power unrelated equipment, and do not exceed relay contact ratings. Gate safety devices and operator safety circuits must remain installed and functional.
South Florida customers may contact Gate Openers Unlimited for product availability and Hialeah Gardens local pickup when appropriate. For multi-tenant, HOA, commercial, or community gate installations, confirm the access method, cellular carrier, user capacity, mounting location, and accessory requirements before ordering.
Professional Advisory
Cellular gate entry systems depend on proper low-voltage wiring, cellular signal, SIM activation, grounding, and safe interface with the gate operator. If the existing system has intermittent operation, poor cellular signal, unknown relay wiring, lightning damage, gate safety faults, or operator control-board issues, have the system checked by a qualified gate, garage, low-voltage, or access control technician before replacing parts.
Product Questions & Answers
Is the SG3DMCL a 4G LTE / VoLTE cellular gate entry system?
Yes. The SG3DMCL is part of the Select Entry Systems Cellular Select Gate family and is intended for 4G LTE / VoLTE cellular gate entry applications when an active compatible SIM with talk and SMS text service is used.
Does the SG3DMCL work with a data-only SIM card?
No. The SG3DMCL requires SIM service that supports talk and SMS text. A data-only SIM should not be used because the unit relies on voice calling, SMS text commands, and related cellular functions.
Can the SG3DMCL connect to any gate operator?
It may be used with select gate operators that accept a low-voltage dry-contact relay command, but it is not automatically compatible with every operator. Confirm the operator control input, relay function, wiring method, and safety circuit requirements before installation.
What is the difference between SG3DMCL and SG3DMRCL?
SG3DMCL and SG3DMRCL are related Cellular Select Gate models, but they should not be substituted by appearance alone. SG3DMRCL is commonly associated with RF receiver capability for SelectPass transmitter use, so confirm the required model suffix before ordering.
Does the SG3DMCL include the SIM card and transformer?
The SG3DMCL is commonly shown with a 12 VDC 2A transformer and a factory-supplied SIM, but the SIM carrier reference has varied by documentation and production period. Confirm the current package contents before publishing, selling, or installing the unit.
Can I use the SG3DMCL with card readers?
Yes, the SG3DMCL includes a built-in 26-bit Wiegand input for compatible card access. The reader, cards, site code, card format, wiring, and programming still need to be confirmed for the specific installation.
What should be checked before installing this cellular entry system?
Check 4G LTE / VoLTE signal at the gate, confirm the SIM has talk and SMS service, verify the operator dry-contact input, confirm power supply requirements, confirm grounding, and make sure all gate safety devices remain connected and working.
Can the SG3DMCL be used as an emergency 911 phone?
No. The SG3DMCL cellular entry system is not intended for 911 emergency calling. Emergency access, fire access, and required life-safety functions should be handled through the proper approved devices for the site.
