Blue Sea Systems 7615 Installation Instructions Manual

Can be congured to be used as one of the following battery saving products

Timer Disconnect

• 12V signal triggers relay to connect battery power to devices

• When signal is removed the timer is activated and will disconnect devices after a preset time

• Timer ranges from 15 minutes to 4 hours

Low Voltage Disconnect

• 12V signal triggers relay to connect battery power to devices

• After 12V signal is removed, ATD senses low battery voltage and automatically
disconnects devices

• Low voltage setting can be used in conjunction with Timer Disconnect. Low voltage will
disconnect devices prior to preset time to preserve battery power

Automatic Charging Relay

• Automatically combines two batteries when charging, and isolates them when discharging

• Single side sensing design only monitors the voltage of the start battery

• Ideal for auxiliary batteries that are AGM or signicantly larger than the start battery

Solenoid

• 12V signal will connect or disconnect relay without any time delay

Installation Instructions

ATD Automatic Timer Disconnect

7615

DC

AC

Before beginning electrical installation, disconnect all AC and DC power sources.

Do not service equipment that has been automatically disconnected by the ATD without rst permanently

removing power from the equipment by a means other than the ATD.

WARNING

CAUTION

If you are not knowledgeable about electrical systems, consult an electrical professional.
To avoid corrosion to connecting wires and terminals, mount in a dry and protected location if possible.

Avoid locations directly above the battery banks.

The ATD is not intended to carry engine starting currents. If the ATD is used as a disconnect, do not wire it in
line with the starting circuit. If the ATD is used as an ACR, do not use it to combine batteries for emergency
starting. Use a battery switching system with a combine batteries/parallel function if batteries may need to be
combined for emergency starting.

980025450 Rev.002

Specications 

Nominal Voltage 12V DC

Input Voltage Range 9.5–16V

Continuous Rating 120A

Intermittent Rating: 5 min. 210A

(Combine) Amperage Operating Current 175mA

(Open) Amperage Operating Current 4mA

Cable Size to Meet Current Ratings 1 AWG (50mm²)

Maximum Cable Size 1/0 AWG (50mm²)

Terminal Stud Size 3/8"-16 (M10)

Terminal Stud Torque 140 in-lb (15.82 Nm)

Time Range 15 Minutes – 4 Hours

Charge Sense ON

Connected (3 sec) 13.0V or greater

Timing (10 sec) 12.75V or lower

Low Voltage

Disconnected (10 sec) Battery Voltage < Disconnect Voltage

Over Voltage

Disconnected (5 sec) 16.0V or greater

Regulatory

CE marked for ignition protection. Meets ISO 8846 and SAE J1171 external ignition

protection requirements

IP67 - protected against immersion up to 1 meter for 30 minutes

Guarantee

Blue Sea Systems stands behind its products for as long as you own them.

Find detailed information at www.bluesea.com/about.

For customer service, call 800-222-7617.

Refers to a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

Refers to a potentially hazardous situation which, if not avoided, may result in death or serious injury.

Minimum connections for operation:

- Connect the primary/starting battery to the stud marked BATT.

- Connect the loads to be disconnected to the stud marked LOAD (or connect the secondary/house
battery for ACR applications).

- Connect the quick connect terminal marked GND (ground) to the DC system ground.

- Start key / Ignition: Used to trigger the ATD to connect. Wire the quick connect terminal marked "Start
Key" through a 1-10A fuse to the accessory position of your ignition switch to enable the ATD to close
when the ignition is on.

NOTE: The Start key / Ignition connection is optional if and only if the "Charge Sense" DIP switch is enabled, in
which case the ATD will be triggered to connect if battery voltage is above 13.0V for 3 seconds.

Optional Connection:

Remote Indicator LED - mirrors the status LED on the ATD

- Appropriate 12V LEDs include Blue Sea Systems PNs 8033 (amber), 8171 (red), or 8172 (green).

- To install a remote LED indicator, connect the positive (red) wire of the LED to a 12V positive source
through a 1-10A inline fuse, and connect the negative (yellow) wire to the quick connect terminal on the
ATD marked "LED".

Dimensioned Drawings

Setup

There are three behaviors that can be customized for the ATD by setting all six DIP switches on the
back side of the device. These behaviors can work together or independently.

Wire Size and Fuse Ratings

Example Settings

Dip Switch Settings Time Voltage

Charge
Sense

Mode Application

Disabled Disabled Off Solenoid Remote Battery Switch

30 min Disabled Off Timing Only Ignition Controlled - Delayed off

Disabled 11.5V Off LVD Only Ignition Controlled - Load shedding

15 min 11.5V Off Timing & LVD

Ignition Controlled ­Delayed off with low voltage override

Disabled Disabled On ACR

Automatic Sensing - Charging a second

battery with single alternator

1 hr 11.0V On

Timing, LVD, &

Charge Sense

Automatic Sensing ­Delayed off with low voltage override

2. Set Disconnect Voltage

Low battery voltage that will
trigger power disconnect from
devices.

1. Set Disconnect Time

Amount of time delay before power
is disconnected from devices.

3. Set Charge Sense

Allows ATD to be either manually
activated by a 12V signal or
automatically activated by
sensing a charging source
(i.e. engine alternator).

Note: Use a small at blade
screwdriver or other suitable tool
to set switches. DIP switch settings
are checked by the device once per
second. If settings are changed while
the device is in timing mode, the
timer will be reset to the new value.

START

ON

OFF

BATTERY

COMMON BUS BAR/CHASSIS

16 AWG

GROUND

IGNITION SWITCH

2 AMP

FUSE

2 AMP

FUSE

OPTIONAL

REMOTE

LED

OPTIONAL START KEY*

16 AWG

16 AWG

NON-CRITICAL LOADS

Dip Switches 1-3

Dip Switch Settings Time

0 sec

5 sec

15 min

30 min

1 hr

1.5 hr

2 hr

4 hr

Dip Switches 4-5

Dip Switch Settings Volts

Disabled

11.0V

11.5V

12.0V

Dip Switch 6

Dip Switch Settings Charge

Sense

Off

On

Timer, Solenoid, or Low Voltage Disconnect

Use the wiring sizing chart below to select the appropriate wire sizes to prevent overheating the ATD.
Consult an ABYC certied electrician for proper fuse placement and sizing.

* For Disconnect mode, this is dened as the maximum continuous amperage being drawn through the ATD by the
loads. For ACR mode, this is the charging amperage of the power source (i.e. engine alternator).
** Larger wire sizes may be required to minimize voltage drop in long wire runs. For more information please use the
Circuit Wizard at www.circuitwizard.bluesea.com

Note: Because the ATD is single sensing
the battery must be attached to the stud
labeled “BATT” and the devices to be
disconnected must be attached to the
stud labeled “LOAD”. Reversal of these
connections will render charge sense
functionality non-operational.

Legend

DC Positive DC Negative

2 AMP

FUSE

OPTIONAL
REMOTE
LED

GROUND

GROUND

COMMON BUS BAR/CHASSIS

START BATTER

YH

OUSE BATTERY

ENGINE

ACCESSORIES

16 AWG

16 AWG

Optional Connection

Automatic Charging Relay

Note: Because the ATD is single sens-

ing, the battery connected to the charg­ing source must be attached to the stud
labeled “BATT”. Reversal of the starting
and house batteries will create undesirable
results.

It is recommended that the ATD be con­nected directly to your battery positive
terminals through appropriately sized fuses.
Connecting in a different location such as a
battery switch may affect accuracy because
of voltage drop along current carrying
conductors.

The Start Key terminal is an optional con­nection when in ACR mode. If connected
the ATD will connect anytime an ignition
signal is sensed. Once ignition signal is
removed the ATD will go back to voltage
sensing. If desired, wire the same as the
diagram below.

Installation Diagrams

425 Sequoia Drive
Bellingham, WA 98226 USA
p 360.738.8230
www.bluesea.com

DIP Switches

Wire Size and Fuse Rating Chart (Metric)

Continous Amps* Minimum Wire Size** Fuse Rating

≤50 10 mm

²

75-80A

≤70 16 mm

²

80-90A

≤90 25 mm

²

125-130A

≤110 35 mm

²

150A

≤120 50 mm

²

150-175A

Wire Size and Fuse Rating Chart (AWG)

Continuous Amps* Minimum Wire Size** Fuse Rating

≤60 #6 75-90A
≤80 #4 100-125A

≤100 #2 150A
≤120 #1 175A

These installation diagrams show typical applications only.
Your application may differ.

* Start Key connection is optional only if "Charge Sense" setting
is enabled, to allow the ATD to connect when it senses battery
voltage above 13.0V for 3 seconds.