Blue Sea Systems SafetyHub 250 User Manual

Marine Electrical Prod

ucts

SafetyHub 250

Fuse Block with Remote Battery Switch

PN 7727 / PN 7727B

PN 7727 includes a Remote Control Contura Switch,

two connector plugs and an Engine Circuit Link Bus

The SafetyHub 250 combines an ignition protected fuse block with a
remote battery switch and integrated connecting plugs. It is safe
for use on gasoline powered boats, reduces connecting wires, and
consolidates up to seven fused circuits. The SafetyHub 250
provides battery control from a remote location and a local switch for
emergency shutdown or servicing.

WARNING

] Mount in a dry location.
] Disconnect all battery connections before beginning the installation.

] Blue Sea Systems strongly recommends that a competent electrical

professional perform the installation of this product.

] Do not switch the SafetyHub to OFF while the engine is running.

Damage to the alternator will result.

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.

Blue Sea Systems Inc. p 360.738.8230
425 Sequoia Drive f 360.734.4195
Bellingham, WA 98226 USA [e-mail]
www.bluesea.com

980004730 Rev.004

Operating Instructions

Specications

Amperage Maximum Operating (combined) (see table below)
Nominal Operating Voltage 12V DC
Minimum Input Cable Size to Meet Ratings 4/0 AWG (120 mm²)
Recommended Ring Terminal M8 (5/16")
Stud Size M8 x 1.25
Stud Torque 15 ft-lb (20.3 N-m)

Internal Battery Switch

Continuous Amperage Rating 240A
Cranking Rating: 10 sec. 1,000A

AMI®/MIDI® Fuse Block

Amperage Maximum Operating (per block) 240A
Amperage Maximum Operating (per circuit) 170A
Fuse Amperages Available 30A–200A
Minimum Cable Size to Meet Ratings 2/0 AWG (70 mm²)
Screw Size M5 x .8 x 10
Screw Torque 27 in-lb (3.0 N-m)

ATO®/ATC® Fuse Block

Amperage Maximum Operating (per block) 50A
Amperage Maximum Operating (per circuit) 20A
Fuse Amperages Available 1A–20A

Regulatory

marked

Meets ISO 8846 ignition protection, and SAE J1171 external ignition protection requirements.

Input Wire Size and Current Derating Table

AWG Wire Size Metric Wire Size Amperage Maximum Operating (combined)

4/0 AWG 120 mm² 280A

2/0 AWG 70 mm² 240A

1 AWG 50 mm² 180A

4 AWG 25 mm² 125A

†

Ratings are dependent on input cable sized for appropriate amperages.

Remote Control Switch

Contura Control Switch SPDT ON-ON
Seals Internal & External Gasket Panel Seal
Operating Temperature Range -40°C to 85°C
Mounting Cut-out 1.450" x 0.830" (36.83 mm x 21.08 mm)
LED Rating 100,000 hours 1/2 life

Regulatory

Meets ISO 8846 ignition protection and UL 1500 external ignition protection requirements
IP67–Protected against immersion up to 1 meter for 30 minutes

Operating Instructions (continued)

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†

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The SafetyHub 250 uses a SPDT ON-ON Remote Control Switch for control
from a remote location. The Remote Control Switch should be mounted
in a convenient location for quick access. It incorporates a lockout slide to
reduce the risk of accidental switching.

CAUTION Do not switch the Remote Control Switch to OFF while the

engine is running!

ACTION OPERATION LED INDICATION

To switch the battery
bank and high-amperage
circuits ON

To switch the battery
bank and high-amperage
circuits OFF

Depress the top part
of the Remote Control
Switch actuator.

Depress the bottom part
of the Remote Control
Switch actuator.

LEDs on switch and block
illuminate, indicating that
switched circuits are ON.

LEDs on switch and block do
not illuminate, indicating that
switched circuits are OFF.

Unswitched Fused Circuits

Fused circuits A, B, C, and D are always on 24-hour, (non-switched), regardless
of the Remote Control Switch and manual override switch states
(see Illustration 1.2 - System Diagram on reverse side).

Fuses

Unlatch the two yellow tabs on the fuse cover to access fuses.

®

The ATO
(non-switched) circuits. The total continuous amperage of this block must not
exceed 50A.

The AMI®/MIDI® Fuse Block of the SafetyHub 250 is used for the switched circuits.
The total continuous amperage of this block must not exceed 240A.

®

/ATC

Fuse Block of the SafetyHub 250 is used for 24-hour

Engine Link Bus

Use the Engine Link Bus in place of a AMI®/MIDI® fuse for a switched engine
starting circuit. (See illustration 1.2 on reverse side.)

Indicator LED

The SafetyHub LED will illuminate when the battery switch and high-amp
switched circuits are ON.

The manual control override knob overrides the Remote Control Switch
and provides:

• An added level of safety that allows manual ON-OFF control with or
without power

• LOCK OFF position for servicing the electrical system or to disconnect the
battery bank and high-amperage circuits in an emergency

Manual Control Override Operations

Battery bank and high-amp switched circuits 1,2, and 3 only:

ACTION

To switch the
SafetyHub 250 ON

See Note

To switch the
SafetyHub 250 OFF

To switch the
SafetyHub 250 back
to READY

To prevent remote
operation of the
SafetyHub 250 for
SERVICE LOCKOUT

Note: If either the manual control knob or the Remote Control Switch is in the OFF
position, the SafetyHub 250’s internal battery switch and high-amp switched circuits
will be off.

OPERATION

Turn manual control knob to the
ON position and push button
until latched.

Rotate manual control knob
to the OFF (red) position
(switch contacts open).

Rotate manual control
knob back to the ON position.

Rotate manual control knob
to the OFF (red) position.

Installation Instructions

1.965"

49.91mm

1.010"

25.65mm

.595"

15.10mm

1.125"

28.58mm

TEST CUT

HOLE IN

ACTUAL

CENTER

1.450"

36.83mm

0.830"

21.08mm

Installation Instructions (continued)

Mounting

Install the SafetyHub in a readily accessible location as close as possible to the
battery. Mount in a dry and protected location. Avoid mounting directly above
vented lead acid batteries so that the SafetyHub is not exposed to corrosive
gasses from the batteries.

Where possible, mount the SafetyHub in a vertical orientation.
(see illustration 1.1 below)

For help selecting the appropriate wire size and circuit protection rating,
go to www.circuitwizard.bluesea.com

High Current Input / Remote Battery Switch Connection

Connect the positive battery terminal to the input stud on the SafetyHub.
Torque the connection to 15 ft-lb.

High-Amperage Switched Fuse Circuit Connections

To connect high amperage loads such as an engine starting circuit, distribution
panel, or windlass, use the numbered high amperage studs.

CAUTION Do not switch the Remote Control Switch to OFF while
the engine is running!

Unswitched Fuse Circuit Connections

The fuse connections labeled with letters are designed to be used for circuits
that are always on. PN 7727 includes a wire harness to connect to the
ATO®/ATC® fuse connector plug receiver.

Control Circuit Connections (wires contained in the wire harness)

NOTE: The SafetyHub is designed to be controlled by the Remote Control

Switch. Use minimum 18 AWG (1.5mm²) wire for the control circuit.

Remote Control Switch Dimensions

PIN OUT Table

Connector Pin Wire Insulation Color Circuit Function

1 Black External negative
2 N/A No connection
3 Yellow LED controlled negative
4 Red Switch power source
5 Orange Control signal
6 N/A No connection

Illustration 1.2 - System Diagram

24-HOUR (NON-SWITCHED) CIRCUITS

Illustration 1.1 - Mounting Orientation

Engine Link Bus

(included)

Note: Wires used

for engine starting

do not require circuit

protection. If you

choose not to fuse the

engine starting circuit,

use the PN 7732

Engine Circuit Link Bus

(included) instead of a

MIDI®/AMI® fuse. Do

not use this link for

any other purpose.

MOUNTING
HOLES X2

1 2 3

SWITCHED CIRCUITS

A

B

C

D

Mount the SafetyHub 250 vertically as shown in
illustration, and in a dry and protected location.