Dakota Alert SMA-4000 Driveway Alarm Kit with Smart Receiver

Driveway Alarm Kit with Motion Detector and Smart Receiver

The Dakota Alert SMA-4000 combines a DCMT-4000 wireless motion detector transmitter with the SR-4000 smart receiver to create a driveway alarm kit for homes, shops, and small facilities. The motion detector mounts near the driveway and looks across approaching traffic. When it sees a person or vehicle in the monitored area, it sends a radio signal to the plug-in receiver inside the building, which provides an audible alert and can trigger connected devices or app notifications.

This kit is intended for locations where it is useful to know when someone pulls into a drive or walks through an approach, without installing a full security system or running long low-voltage wires out to the driveway.

DCMT-4000 Wireless Driveway Motion Detector

The DCMT-4000 is a battery-powered motion detector designed for outdoor use along a driveway or approach. It uses passive infrared sensing to detect people or vehicles moving across its field of view. The range jumper allows the installer to set the detection distance to low (up to about 25 feet), medium (up to about 50 feet), or high (up to about 100 feet), so the monitored zone can be sized to the site rather than always running at maximum distance.

A built-in transmitter sends the alarm signal wirelessly to the receiver. The DCMT-4000 runs from a single 9V alkaline battery and ships with both a plate mount and a swivel mount so it can be attached to posts, trees, or walls depending on the installation.

• • Detection method: passive infrared motion sensing for people and vehicles.

• • Selectable detection range: low up to 25 ft, medium up to 50 ft, high up to 100 ft.

• • Power source: 9V alkaline battery (not included).

• • Wireless range to receiver: up to about 5,000 ft line-of-sight, reduced by hills, trees, and buildings.

• • Housing size: approximately 4.5" H x 3" W x 2.25" D.

• • Operating temperature: about -30°F to 120°F.

• • Operating frequency: 433 MHz.

Driveway Sensor Mounting and Placement

For driveway use, the DCMT-4000 is typically mounted on a wooden post or tree three to four feet off the ground and about twenty feet back from the edge of the drive, aimed across the lane rather than directly along it. This orientation lets the sensor see the side movement of vehicles and people as they pass through the beam, which produces a clearer motion signal.

The manual notes that the sensor may occasionally see farther than the selected range, so it is best not to aim it at distant roads. The transmitter should be mounted on something rigid so it does not move in the wind, and steel posts are avoided when possible to keep signal quality consistent.

• • Recommended mounting height: about 3–4 feet above ground level.

• • Typical offset from drive: roughly 20 feet from the side of the drive.

• • Mounting surfaces: wood posts or trees preferred; avoid flimsy supports and small flexible trees.

SR-4000 Smart Receiver for Indoor Alerts

The SR-4000 smart receiver plugs into an indoor outlet and listens for signals from the DCMT-4000 and other Dakota Alert 4000 Series transmitters. When the driveway sensor activates, the SR-4000 plays one of its available chime tones. Different transmitters can use different tones, which makes it easier to tell driveway alerts from other zones.

The receiver also supports app connectivity and low-voltage outputs. Depending on how it is set up, a driveway activation can ring a chime, send a notification through the Dakota Alert app, operate a small powered device on its 12VDC output, or close the built-in relay contacts.

• • Power: plug-in power supply (typically 12 VDC adapter included with receiver).

• • Audio alerts: multiple selectable melodies for different transmitters.

• • Wireless range from sensor: up to about 5,000 ft line-of-sight when conditions are favorable.

Smartphone Alerts and Remote Indication

When connected to the local network and configured with the Dakota Alert app, the SR-4000 can send a push-style notification each time the DCMT-4000 reports motion. This gives an additional path for driveway alerts beyond the audible chime, which can be helpful when the receiver is in a noisy area or when staff are away from the immediate chime location but still on site.

In many installations, the chime tone provides the primary alert during normal operation, while the phone notification serves as a backup or a way to keep a record of recent driveway activity.

• • Notification type: push notifications through the Dakota Alert app.

• • Use case: add phone alerts alongside the receiver’s built-in chime.

12VDC Outputs and Form C Relay on the SR-4000

The SR-4000 smart receiver includes 12VDC outputs and a Form C relay contact. These can be tied to other devices that should react when the driveway sensor activates. For example, the 12VDC terminal can power a small strobe, buzzer, or other low-current indicator, while the relay can connect to an alarm input, automation controller, or other equipment that expects a dry contact.

Because the outputs are on the receiver, the wiring for any add-on device stays inside the building near the receiver rather than going out to the driveway location.

• • 12VDC output: switched low-voltage output for compatible accessories.

• • Relay contacts: Form C (common, normally open, normally closed) dry contact.

• • Typical uses: drive a strobe, external sounder, dialer, or system input when the drive is triggered.

Dakota Alert 4000 Series Compatibility

Both components in the SMA-4000 kit are part of the Dakota Alert 4000 Series. The SR-4000 can learn multiple transmitters, so additional driveway sensors, motion sensors, or other 4000 Series devices can be added later if needed. Each transmitter can be set to its own tone and zone.

This lets the system start as a driveway alert and grow into a more complete property alert setup while using the same receiver hardware.

• • Series: compatible with Dakota Alert 4000 Series transmitters and receivers.

• • Number of transmitters: receiver can learn multiple transmitters for different areas.

What Comes in the SMA-4000 Kit

• • One DCMT-4000 wireless motion detector transmitter with plate and swivel mounts.

• • One SR-4000 smart receiver with plug-in power adapter.

• • Mounting screws for the DCMT-4000 brackets.

• • Printed documentation for both components.