Blue Sea Systems PN9112 User Manual

Marine Electrical Prod

ucts

L-Series ACR with Coil Economizer

Features

• Automatically combines battery banks during the charging cycle and
isolates under discharge

• Override for emergency engine paralleling to start an engine

• Activates whether the charging source is an alternator or battery charger

• Output for “ON” indication LED

• Integrated coil control minimizes heating and amperage draw

• Hermetically sealed contacts/vaporproof

• Single or double sensing

• Pulse circuit requires very low current draw when contact is closed

• Ignition protected - Safe for installation aboard gasoline powered boats

• Meets SAE J1171 - External ignition protection requirements

• UL Recognized - UL 508 industrial control equipment

Blue Sea Systems Inc. Phone [phone]
425 Sequoia Drive Fax [phone]
Bellingham, WA 98226 USA E-mail [e-mail]
www.bluesea.com

PN 9112

6693 Rev.005

Specifi cations

Combine 13.6, 27.2 Volts
Automatic Drop Out 12.6, 25.2 Volts
Automatic Over Voltage Drop Out 15, 30 Volts
Combine Time Delay 30 Seconds
Coil Circuit:
Input Voltage: 9 - 36 Volts DC
Power Consumption: Inrush, 130ms: 3.8 Amperes@12-36V DC
Holding 12 Volts: 0.13 Amperes@12V DC

0.07 Amperes@24V DC
Main Power Contacts:
Voltage Rating 60 Volts DC
Stud Terminal Size M8 (accepts 5/16” terminals)
Terminal Stud Torque 80-100 In-lb
Contact Form SPST-NO
Inrush Rating: 250ms (10 repeats)* 2000 Amperes
Mechanical Life 1 Million Cycles
Make Current@10,000 Cycles: 2000 Amperes@28V
Break Current@10,000 Cycles: 2000 Amperes@28V

Wire Size Cranking Rating

9.75 sec. (10 repeats)*

1/0 450A 375A 250A

2/0 500A 450A 300A

2x2/0 800A 600A 450A

* Blue Sea Systems Engine Starting Standard

Intermittent Rating

5 min. (UL 1107)

Continuous Rating

(UL 1107)

Guarantee

Any Blue Sea Systems product with which a customer is not satisfi ed may
be returned for a refund or replacement at any time.

Installation Instructions

Mounting

• Select a dry and protected mounting location near the battery banks or the
battery switch.

• Choose a cool, dry, and well-ventilated location if possible. The L-Series ACR
with Coil Economizer may become very warm when operating at full
current-carrying capacity.

• Avoid locations directly above batteries where corrosive fumes may be present.

• Mount the relay securely with #10, #12, or 5mm screws through the fl anges at
the base. Hole size is 0.22 inches.

Electrical Connections

The wiring confi guration to the right represents a common installation and is not
meant to be a guide for the wiring of a specifi c vessel. Consult your marine
electrical professional for the wiring system applicable to your boat.

Disconnect the positive battery connection before beginning the installation. If
there is a possibility of tools causing a short, disconnect the negative terminals
before disconnecting the positive battery terminals.

Make electrical connections based on the wiring diagram to the right. Consult the
Wire Sizing Chart on the following page to determine the appropriate wire size.
If a manual control is installed to use this device for emergency paralleling of
batteries for engine starting, no fusing is required in the main circuit, but wire
sizes should be chosen for the full starting currents. If starting service is not
included, choose circuit protection according to wire capacity. If a charging
source is present and the relay is closed in automatic mode when an engine is
started, starting currents can fl ow through this circuit. This can result in blowing of
protection fuses if the wiring system does not limit the current.

Voltage Sensing

The 9112 ACR is designed to sense, and operate from, the voltage supplied by
either battery. In a typical application, the engine driven alternator is connected to
the starting battery. When the starting battery is suffi ciently charged, the ACR will
close and share charging with the house battery. If a shore charger is supplying
the house battery, when it has brought the house battery up to voltage, the ACR
will close and share with the starting battery.

Typical Confi guration - Sense Both Battery Banks

• Connect one battery bank to stud terminal A1

• Connect the other battery bank to stud terminal A2.

• Connect the black line (negative) from the relay to the battery negative
through a 10-15 Amp in-line fuse to prevent fault current from fl owing in
this wire.

Caution: Battery cable terminals must be placed at the bottom of the stack
under the sensing wire terminals, the fl at washer, the lock washer, and the nut.
Tighten securely. Refer to the Lug Installation Diagram on following page.

Sense One Battery Bank

• Remove red ring terminal voltage sensing wire from the stud terminal A1or A2
associated with the battery bank that you don’t want to sense.

• Place the removed ring terminal over the stud terminal to which the other
voltage sensing wire is attached, or insulate the ring terminal and fold it out
of the way.

The negative (black wire) connection from the relay to the battery negative must
be as short as possible. Because the built in coil economizer causes current
pulses in the control circuit, there may be noise present on the black wire and it
should not be run with sensitive wires from other circuits.

• Gray dashed lines indicate optional connections

Wiring Diagram

Installation Instructions (continued)

Manually Connect and Disconnect Battery Banks

A control switch such as a Blue Sea System’s Switch Panel 8270 or Contura Switch
8232/8283 may be used to manually connect and disconnect battery banks by
overriding the L-Series ACR voltage sensing circuit.

To connect a manual override switch:

• Connect Control Line (orange) to the center common terminal of an
ON-OFF-ON single pole, double throw switch.

• Connect negative and positive to the outside terminals of the switch.

• When the control line is switched to a positive supply, the relay is closed when
ever the voltage is greater than about 9 volts at either terminal.

• When the control line is switched to the negative supply line, the relay will be
held open.

• When the switch is in the center position, with no command to the relay, the
relay will operate automatically to close and open when it senses charging
voltages. The control signal passes very little current and can be supplied from
any fused positive source.

Remote Indicator Lamp

To determine at a remote location when the battery banks are connected, a remote
LED indicator can be connected to the L-Series ACR. Suitable indicator lamps are
Blue Sea Systems PN 8033 (amber), PN 8171 (red), or PN 8172 (green).

To connect an LED indicator:

• Connect the red wire of the LED to a positive source.

• Connect the yellow wire of the LED to the Status Line (blue).

Wire Sizing Chart

Use the wire sizing chart below to determine minimum wire sizes open to
free air circulation.

10

8

6
4

2

1

0

00

000

0000

Note: For wire with 105°C insulation rating, no more than 2 conductors
are bundled, and not enclosed in conduit or other extra insulation.
Not suitable for sizing flexible shore power cords.

60.0

80.0

120.0

160.0

210.0

245.0

285.0

330.0

385.0

445.0

51.0

68.0

102.0

136.0

178.5

208.3

242.3

280.5

327.3

378.3

Lug Installation Diagram

Operation

Operation

When all wiring is complete and has been checked, restore battery connections.
The relay may momentarily energize when power is fi rst applied. The automatic
charging circuit has a 30 second time delay to reduce cycling caused by noise in
the system.

Open/Close Cycling

If your electrical system is confi gured with a charging source that cannot supply
the full load current being drawn from the receiving battery, a cycling process
can occur. With the ACR open and the charging source supplying the fi rst battery
bank, its voltage will rise until the ACR senses suffi cient to indicate charging and
combine the two battery banks. If the second battery bank is supplying loads that
are drawing greater current than the capacity of the charging source, the voltage
will drop because there is a net discharge on the system. The ACR will respond
to the low voltage and open, disconnecting the second battery bank and its load.

Control

Line

Relay ON (Manual)

Relay Pickup
(Auto)

Conditions to turn
relay on

Relay Dropout
(Auto)

Conditions to turn
relay off

Relay Off (Manual) <1V Open Anything Anything

>9V Closed >9 Anything

>9V Closed Anything >9

Open Open

Open Closed

Open Closed < House Battery

Open Closed

Open Open

Anything Open <6 <6

PN 9112

Contacts

Starting Battery

Voltage Sense

<13.6,

15 to 27.2,>30

13.6 to 15,

27.2 to 30

12.6 to 15,

25.2 to 30
<12.6,

15 to 25.2, >30

Table of Operation

House Battery
Voltage Sense

<13.6,

15 to 27.2,>30

<Starting Battery

13.6 to 15,

27.2 to 30

12.6 to 15,

25.2 to 30
<12.6,

15 to 25.2, >30

Wiring Identifi cation

The voltage will again rise as the fi rst battery bank recovers and the ACR will
close again after a delay. If this open/close cycling continues, the second battery
bank could eventually discharge even though a charge source is present.

Performance Specifi cations Units Min Nom Max

AUTOMATIC MODE@25C

Pickup Voltage (PU1) V DC 13.5 13.6 13.7

Drop-out Voltage (DO1) V DC 12.5 12.6 12.7

Over Voltage (OV1) V DC 14.8 15 15.2

Pickup Voltage (PU2) V DC 27.0 27.2 27.4

Drop-out Voltage (DO2) V DC 25.0 25.2 25.4

Over Voltage (OV2) V DC 29.6 30 30.4

Over Voltage Hysteresis V DC .35

Coil

Inrush Current A 1.5 2.8 3.5

Inrush Time s .80 .100 0.13

Hold Current, Ave A .03 .110 .160

PWM Frequency kHz 20

Time Delay on Close s 25 30 35

MANUAL MODE

Maximum Input Voltage V DC - - 36

Pickup Voltage V DC 8 8.5 9

Drop-out Voltage V DC 6 6.5 7

Current Draw When Contactor is “Off” mA .05 1 2

Status Line
(Open Collector with 1k Limiting Resistor)

Voltage, Maximum V DC - - 36

Current, Maximum mA - - 36