ATD Automatic Timer Disconnect - ATD Automatic Timer Disconnect

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Blue Sea Systems

7615-BSS

Automatic timed disconnect ATD

The BLUE SEA ATD Automatic Timer Disconnect 7615-BSS is a compact solution for managing 12V electrical systems, offering four configurable modes: timed disconnection (15 min to 4h), low-voltage disconnection (11.0V–12.0V), automatic charge relay (ACR), and solenoid control. Certified to IP67 and flame-resistant, it provides effective protection for batteries and onboard equipment. The unit ships with a protective cover for terminal connections.

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£115.81 GBP

£115.81 GBP ~~£138.08 GBP~~

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In stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

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Support service

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Technical specifications

Terminal size	3/8"-16 (M10)
IP rating	IP67
Protection AFD	No
Organisme de certification	HPi Verification Services
Certification Issue Date	2017-02-10
Charge Sense Functionality	Yes
Courant de bobine (mA)	175 mA (combined), 4 mA (open)
Tension de la bobine	12 V DC
Courant continu (A)	120 A
Type de contrôle	Electronics (via 12V signal, voltage detection, DIP switches)
Dimensions (W x H x D)	98.71 x 65.09 x 88.96 mm
Eu Type Examination Certificate	HPIVS/R1168-006-I-01
Courant intermittent (A)	210 A (5 min)
Verrouillable à clé	No
Low Voltage Disconnect Delay Seconds	10
Low Voltage Disconnect Threshold Setting	11.0V, 11.5V, 12.0V
Maximale tension dc	16 V
Mounting type	Surface-mount
Nombre de pôles	1
Operating voltage range	9.5-16 V
Over Voltage Disconnect Delay Seconds	5
Over Voltage Disconnect Threshold V	16.0
Product use	Multifunctional battery management device for 12V systems, providing timed disconnection, low-voltage disconnection, automatic charge relay (ACR), and solenoid functions.
Switch type	Automatic disconnector / Relay
Terminal Stud Torque Nm	15.8
Type de borne	Threaded stud
Timer Disconnect Time Range Setting	15 Minutes – 4 Hours
Warranty	Lifetime
Type de connexion câblage	Threaded stud

Detailed description

Designed for optimized management of 12V marine electrical systems, the BLUE SEA ATD Automatic Timer Disconnect (reference 7615) is a versatile device capable of performing four distinct functions: timed disconnection, low-voltage disconnection, automatic charge relay (ACR), and simple solenoid. This flexibility allows multiple battery management functions to be consolidated into a single component, simplifying complex installations.

Power management and battery protection

The BLUE SEA ATD 7615-BSS offers configurable disconnection options to protect batteries from excessive discharge. In timed disconnection mode, it cuts power to devices after a predefined period ranging from 15 minutes to 4 hours once the 12V signal is removed. For enhanced protection, the low-voltage disconnection mode monitors battery voltage and automatically isolates loads when it reaches an adjustable threshold (11.0V, 11.5V, or 12.0V), with a 10-second delay to prevent false triggers. This function can be combined with timed disconnection for proactive management.

Charge relay and solenoid functionalities

As an automatic charge relay (ACR), the BLUE SEA ATD 7615 automatically combines two battery banks for charging from a single source, then isolates them during discharge. Its unilateral sensing design monitors the starter battery voltage, making it suitable for AGM auxiliary batteries or larger capacity batteries. The device connects when voltage reaches 13.0V for 3 seconds and disconnects if it falls below 12.75V for 10 seconds. Finally, the ATD 7615 can operate as a simple solenoid, activating or deactivating the relay instantly via a 12V signal, without delay.

Robust and compliant with marine standards

The ATD 7615-BSS is designed for demanding marine environments, with immersion protection up to 1 meter for 30 minutes (IP67). It is CE marked and meets external ignition protection requirements per ISO 8846 and SAE J1171, ensuring enhanced safety. With a continuous current capacity of 120A and intermittent capacity of 210A (5 min), it is compatible with cables up to 1/0 AWG (50mm²) via M10 studs. Configuration is performed via DIP switches, allowing precise adaptation to system requirements. Overvoltage protection disconnects the device if voltage exceeds 16.0V for 5 seconds.

Documentation

Type	Nom
	EN - Instructions - ATD Automatic Timer Disconnect
	EN - Dimensioned Drawing - ATD Automatic Timer Disconnect
	EN - Sell Sheet - ATD Automatic Timer Disconnect
	EN - Certificate - ATD Automatic Timer Disconnect
	EN - Certificate - ATD Automatic Timer Disconnect

Expert opinion

Pol CONIN

Digital Manager

« Versatility and protection: the ATD BLUE SEA 7615 for simplified electrical management »

The BLUE SEA ATD 7615 is positioned as an essential component for streamlining electrical installations on board mid-sized sailboats and powerboats. Its unique ability to integrate multiple key energy management functions into a single unit sets it apart from traditional modular solutions. Instead of installing separate automatic charge relays, timed circuit breakers, and low-voltage disconnect devices, the ATD 7615 centralizes these roles, reducing wiring complexity and clutter. This consolidation is particularly beneficial in confined technical spaces.

In terms of practical use, this device is ideal for owners looking to automate protection of their service batteries against deep discharges, or for those wanting automatic disconnection of non-essential loads after engine shutdown or a period of inactivity. For example, it can be configured to automatically turn off deck lighting or navigation electronics after a set time, or to isolate the service bank if voltage drops dangerously, thereby preserving the starter battery. Its ACR function is relevant for two-battery systems where the charging source is single and unilateral detection (on the starter battery) is sufficient.

Installation requires an understanding of marine electrical schematics, particularly for cable sizing (up to 1/0 AWG) and integration of appropriate fuses. It is critical to note that the BLUE SEA ATD is not designed to handle engine starting currents. If used as an ACR, it must not be employed to combine batteries in emergency starting scenarios; a dedicated battery switching system with coupling function is then required. Configuration via DIP switches is simple and intuitive but requires physical access to the unit. The mounting location must be dry and protected to prevent connection corrosion, though its IP67 rating provides significant resistance to moisture.

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Automatic timed disconnect ATD

£115.81 GBP

£115.81 GBP ~~£138.08 GBP~~

Frequently Asked Questions

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What are the main functions of the BLUE SEA ATD Automatic Timer Disconnect?

The BLUE SEA ATD Automatic Timer Disconnect is a versatile device that can be configured to perform four main functions:

Timed disconnection: Cuts power to devices after a predefined period ranging from 15 minutes to 4 hours once the 12V signal is removed.Low-voltage disconnection: Automatically disconnects devices when battery voltage reaches a configurable low threshold (11.0V, 11.5V, or 12.0V).Automatic Charge Relay (ACR): Automatically combines two battery banks for charging from a single source, then isolates them during discharge.Solenoid: Connects or disconnects a relay without a time delay via a 12V signal.

What is the nominal operating voltage of this device?

The nominal operating voltage of the BLUE SEA ATD Automatic Timer Disconnect is 12V DC.

What is the maximum continuous current that the BLUE SEA ATD can handle?

The BLUE SEA ATD Automatic Timer Disconnect has a nominal continuous current rating of 120A.

Can I use the BLUE SEA ATD to combine batteries for emergency engine starting?

No, the BLUE SEA ATD is not designed to handle engine starting currents. If the ATD is used as an automatic charge relay (ACR), it must not be used to combine batteries for emergency starting. A battery switching system with a battery combining/parallel function is recommended if emergency starting may be required.

How can I configure the timed disconnection duration?

The timed disconnection duration can be configured using DIP switches 1 to 3 located at the rear of the device. Time options range from 15 minutes to 4 hours. There are also settings to disable the function or for a 5-second test mode.

What are the options for the low-voltage disconnect threshold?

The low-voltage disconnect threshold can be set using DIP switches 4 and 5. The available options are 11.0V, 11.5V, or 12.0V. There is also a setting to disable this function.

Is the BLUE SEA ATD protected against immersion in water?

Yes, the BLUE SEA ATD Automatic Timer Disconnect is IP67 certified, meaning it is protected against immersion up to 1 meter for 30 minutes.

What type of cables should I use for the connection to comply with the rated currents?

To comply with the rated currents, the minimum recommended cable size is 1 AWG (50mm²). The maximum cable size that the terminals can accept is 1/0 AWG (50mm²).

What is the stud size and recommended torque?

The stud size is 3/8"-16 (M10). The recommended torque for these terminals is 140 in-lb (15.82 Nm).

Can the BLUE SEA ATD be used with AGM auxiliary batteries?

Yes, as an automatic charge relay (ACR), the BLUE SEA ATD is ideal for auxiliary batteries of AGM type or those significantly larger than the starter battery, thanks to its single-sense design that monitors the starter battery voltage.

How does the "Charge Sense" function work and when should it be enabled?

The "Charge Sense" function (DIP switch 6) allows the ATD to be activated automatically by detecting a charging source (e.g., an engine alternator). If this function is enabled, the ATD will connect if the battery voltage is equal to or greater than 13.0V for 3 seconds. It is useful for reducing wiring by replacing the 12V manual trigger signal.

Is there surge protection?

Yes, the BLUE SEA ATD will disconnect devices if voltage exceeds 16.0V for 5 seconds or more, providing surge protection.

Where should I mount the device to avoid corrosion?

To avoid corrosion of the connection wires and terminals, it is recommended to mount the device in a dry and protected location if possible. Avoid locations directly above battery banks.

Is it possible to connect a remote LED indicator?

Yes, it is possible to connect a remote LED indicator that reflects the state of the LED on the ATD. To do this, connect the positive wire (red) of the LED to a 12V positive source via a 1-10A inline fuse, and the negative wire (yellow) to the quick-connect terminal marked "LED" on the ATD.

Is the BLUE SEA ATD certified for ignition protection?

Yes, the BLUE SEA ATD is CE-marked for ignition protection. It complies with external ignition protection requirements per ISO 8846 and SAE J1171.

What is the supported input voltage range for the device?

The supported input voltage range for the BLUE SEA ATD is 9.5V to 16V.

How can the "low-voltage disconnect" mode be combined with the timed disconnect?

The "low-voltage disconnect" mode can be used in conjunction with the timed disconnect. In this case, the ATD will disconnect devices based on the set low-voltage threshold, even before the predefined timed disconnect delay has elapsed, to preserve battery power.

Can I use the ATD for engine starting applications?

No, the ATD is not designed to handle engine starting currents. If the ATD is used as a disconnect switch, it must not be wired inline with the starter circuit.