BEP 720-MDO User manual

INTRODUCTION:
The 720-MDO is a high current, remotely activated battery switch. This allows convenient operation with
the remote switch within easy reach of the user, and the battery switch positioned where cable runs are
minimized.Reducedcablerunsallowsmallersectioncabletobeused,resultinginsignicantreductions
in cable cost, plus weight savings.
As well as remote, motorized operation, the 720-MDO can be manually over-ridden. From the “Manual
Off” position, the switch knob can also be removed, providing security, particularly during servicing.
Designed and constructed for longevity in the marine environment with tinned copper conductors, stainless
steelnutsandhightemperature,brereinforcedplastics.Theunitsareignitionprotected,provideOn/Off
switching operation, and may be recessed or surface mounted.
The Version 8 printed circuit boards include the latest developments in digital circuitry, and optical position
sensing.Theseresultinsignicantimprovementstovoltagemeasurementcircuits,switchoperation,and
provide low power consumption.
Motorised Battery Switch
Model: 720-MDO (Version 8)
OPERATION AND INSTALLATION INSTRUCTIONS

Motorised Battery Switch
Model: 720-MDO (Version 8)
OPERATION AND INSTALLATION INSTRUCTIONS
The 720-MDO Version 8 offers a number of advanced installation options, whereby the motor/circuit board
can be fed from an independent 12V or 24V supply, so the switch contacts are fully isolated and can:
• Stillbeoperatedincasetheswitchedbatteryisat
• Control higher voltage circuits e.g. 32 or 48 volt circuits
• Control negative cables in circuits (e.g. full isolation in metal hulled craft)
• Ensure engine electronics are fully isolated from all loads
• NoteVersion8720-MDO’scanbeidentiedbythe7coreconnectioncablewith3coresterminatedinthe
Wago plug, and 4 cores crimp-terminated
Typical installation is with a
key-operated switch at the helm
station and with the motorised
battery switch installed as close
as practical to the battery bank.
Although any switch may be used
BEP offer the specially developed
80-724-0006-00 key switch
(pictured at right).
Another option is to use BEP’s Wireless Remote
Control. This is similar to a car remote, and
provides access from up to 80m. Working
through a 4 channel relay, the wireless
remote (part number 80-911-0045-00)
canbeconguredtocontrolitemssuch
as motorised battery switches, entry
lights, hatch lifters etc in order to
offer safe, easy entry to your vessel
(pictured at right).
SPECIFICATIONS:
• Continuous rating: 500 Amps DC - minimum 2x95mm²
 (2x3/0)cables
• Intermittent rating: 700 Amps DC - minimum 2x95mm²
 (2x3/0)cables
• Cranking rating: 2500 Amps DC - minimum 2x95mm²
 (2x3/0)cables
• Maximum Voltage: 32VoltsDC(formotor/PCBsupply)
50 Volts DC (switch contacts – note
 motor/PCBsupplyrequires12/24volts)
• Auto operating range: 8 to 32 Volts DC
• Operation: ManualOn/Off,AutoOn/Off
• Mounting: Recessed or surface
• Ignition protected Meets UL 1107 standards
• IP Rating IP65
• Stud Size: 2x12mm(1/2”)–SeeInstallation
 sectionfortorques
• Materials: Tinnedcopperconductors/studs, 
stainless steel nuts, high temperature
 brereinforcedplastics
• Power draw: Switch in off positions: <=5mA@12V or 24V
Switch in “Auto On” 9mA @12V,
13.5mA @24V
Wires For Standard Connection:
Red •LEDWire
Green •ControlWireFrom
Remote Switch
Black •SupplyNegative
Input Stud •HighCurrentConnection
From Battery
Ouput Stud •HighCurrent
Connection To Loads
Terminated into
Wago plug
}
Wires For Advanced/Optional Connections:
Brown •PowerSupplyFromInputStud
Orange  •Motor/PCBSupplyPositive#1
Brown takes power from the Input stud, and
Orangetakesthistothecircuitboard/motorto
control the battery switch.
Blue •PowerSupplyFromOutputStud
White  •Motor/PCBSupplyPositive#2
Blue takes power from the Output stud. White is
a secondary connection to provide power to
circuitboard/motor.Bothisolatedasstandard.
Supplied
connected
Supplied
isolated
}
}

Motorised Battery Switch
Model: 720-MDO (Version 8)
OPERATION AND INSTALLATION INSTRUCTIONS
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DIMENSIONS: LABEL OPTIONS:
- Label set 713
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GENERAL OPERATION:
Note that the knob must be firmly depressed prior to manual rotation, in
order to disengage the motor drive. Failure to do this could damage the
motor drive.
The Motorised Battery Switch, (720-MDO) has two modes of operation, Auto and Manual.
There is an LED located on both the battery switch and the optional remote key switch,
indicating battery switch status.
AUTO OPERATION:
When the remote switch is turned on, the 720-MDO moves from a state of “Auto Off” to
“Auto On”, and the “Auto On” LED becomes illuminated.
Auto operation of the Battery Switch is not possible whilst in manual mode. Knob must be
returned to “Auto Off” or “Auto On” before normal auto operation can continue.
Auto Mode LED Indications:
LED OFF: Battery switch is off
LED ON: Battery switch is on
MANUAL OPERATION:
The automatic operation of the 720-MDO battery switch can be overridden at anytime
by depressing the control knob and turning clockwise towards the “Man On” position or
counter clockwise towards the “Man Off” position.
During the time that the Battery switch is in “Man On” mode, the “Man On” LED is
Illuminated.
Removing the switch knob: The knob is removable for security or maintenance reasons.
Place switch in “Manual Off” position, then press and rotate the knob anticlockwise to
remove. Once knob is removed, remote activation of the battery switch is not possible.
Note: Forstandardinstallation(PCB/motorpowersupplyusingfactorydefaultconguration),Battery must be connected to the
Input Stud, otherwise switch will not operate in Auto mode.
Battery cables must be correctly selected for the maximum loads expected.
Cablesmustbeaminimumof1x95mm²(3/0)toachieve350ampscontinuous.
Cablesmustbeaminimumof2x95mm²(2x3/0)toachieve500ampscontinuous.
Ensurenutsonstudsarecorrectlytightened.Recommendedtorqueis18Nm(13.3lbf).Maximumtorque25Nm(18.5lbf).
Anylatchingon/offremoteswitchcanbeusedtoactivatethe720-MDO.
INSTALLATION:
Motorised Battery Switch
Model: 720-MDO (Version 8)
OPERATION AND INSTALLATION INSTRUCTIONS

STANDARD INSTALLATION DRAWING:
(Provided only as a guide for installation, not as a complete system design)

OPTIONAL INSTALLATION: Switchcontactsisolatedfromcircuitboard/motorsupply
OPTIONAL INSTALLATION: As a Parallel Switch

CUT OUT MEASUREMENTS (NOT TO SCALE)
Motorised Battery Switch
Model: 720-MDO (Version 8)
OPERATION AND INSTALLATION INSTRUCTIONS

Albany, Auckland N.Z.
Ph: [phone]
Fax: [phone]
www.bepmarine.com
E-mail: [e-mail]