BEP DIGITAL VOLTAGE SENSITIVE RELAY User Manual

Speci cations

Mounting

2-11/16" [6.8cm]

2-11/16" [6.8 cm] 2-11/16" [6.8cm]

2" [5cm]

T

O

R

Q

U

E

Current: 125 Amps Continuous, 140 Amps Intermittent
Ignition Protected UL 1107
Auto Voltage Sensing 12VDC or 24VDC (max 32VDC)
Power Consumption (Standby) 1.8mA (1.6mA at 24 VDC)
Power Consumption (Storage Mode) 0mA
Cut In/Cut Out Voltages 13.4V (26.8V) / 12.8V (25.6V)

DVSR Operation Explained - Charging: The DVSR is connected
between two battery banks. When the DVSR senses a charging
voltage (13.4VDC or 26.8VDC) on either of the banks, it automati­cally activates and joins the two battery banks after a short delay (5
seconds), so they are charged as one battery bank.

IMPORTANT!
Read before installing Use

only “plastic safe” corrosion
inhibiting sprays. Do not wipe
solvents/petrochemicals onto
any plastic part of the DVSR.
These units are fully sealed so
do not require any other form of

Plastic safe

Petroleum
based
solvents

water proofing. The DVSR has
been designed to be water resistant but is not designed to be par­tially or fully submerged. The main studs have been tinned to inhibit
corrosion (petroleum base grease may be used on these for further
protection, but should not be used on plastic parts).

Isolation: When the DVSR senses that batteries are not being
charged (voltage drops to 12.8V DC or 25.6V DC) the DVSR
deactivates following a 20 second delay, separating the combined
battery banks into two isolated banks.

Optional Storage Mode: This can be used where the boat/vehicle
is stored for long periods without any battery charging, but with the
batteries still connected. Power consumption is zero when this is ac­tivated. Alternatively, the storage mode can be wired via the ignition
switch, so the DVSR can only operate when the engine is running.
This provides optimal protection of electronics from
electrical spikes, zero power consumption when ignition is off, and
acts like a single sensing VSR as DVSR will only activate when
engine alternator is charging.

IMPORTANT! It is recommended that the DVSR is  tted by a
quali ed marine/automotive electrician. Please follow the instal-

lation instructions supplied. If installation is not correct, the unit may
not perform to its designed potential. If in doubt, consult your local
dealer. It is the installer’s sole responsibility to install and use this
product in a manner that will not cause accidents, personal injury or
property damage. Marinco/Mastervolt/BEP disclaims all liability for
any use of this product that may cause accidents,
damage or be a violation of any laws.

Dual battery charging made easy!

• Automatically charges a second battery bank from any single charging
source

• Alternatively, can be used to supply loads, which are only
powered when a charging source is operating

Features and Bene ts

• Very low power consumption (<2mA)

• Multi-voltage, auto selects between 12VDC or 24VDC

• Digital technology for high efficiency and accuracy

• Dual battery bank voltage sensing

• Output for optional remote mounted status LED

• Optional switching circuit activates DVSR or switches it to zero power con­sumption storage mode

• Protects start batteries from becoming flat

• High capacity (140A) design allows full alternator charging
of heavily discharged batteries

• Ignition protected

DVSR Operation (Shown for 12V System)

START

The two battery

banks are isolated

Charging begins

but batteries

remain isolated

Battery voltage
rises to 13.4V on
charging battery

Mounting

Use supplied
Pan Head screws
for fastening the
DVSR onto the
base plate

If a larger cable cut out is required cut or drill out the wall sections
taking care not to damage the circuit board. Do not cut into the
clear, soft circuit board protecting membrane.

DIGITAL VOLTAGE
SENSITIVE RELAY

DUAL BATTERY
CHARGING MADE EASY

www.bepmarine.com

Battery voltage

falls below 12.8V,

and the DVSR

disengages

Engineered in New Zealand
Made in China

Phone : [phone]
Email : [e-mail]
www.bepmarine.com

source is removed,

battery voltages

The charge

begin to fall

Automatically

engages to join the

two battery banks

for charging

Operation and Installation Instructions

House Batt Positive + (Tinned stud)

Orange sticker (Remote LED connection point)

Start Batt Positive + (Tinned stud)

Black wire - (Negative)

Red wire (Ignition control/Storage mode)

System Voltage

Engages

Disengages

Connections:

Locate DVSR to minimize cable lengths and ensure all cables are
sized correctly for minimum voltage drop (see table below).
Voltage drop will decrease effectiveness of the DVSR, reduce
charge efficiency, and could damage the DVSR and surrounding
devices through excessive heat build-up. Ensure all connections
are tight and suitable for the installation. Use a neutral cure
sealant to seal any cut cable ends.

DVSR Cable Voltage Drop Table

Total

Cable

Length

(m)

Total

Cable

Length

(ft)

1 3 125 3 6 10

2 6 125 3.5 10 7

3 9 125 3.4 16 5

4 12 125 2.6 25 3

5 15 125 3.3 25 3

6 18 125 3.9 25 3

7 21 125 4.6 25 3

Alternator Vs Battery Bank Size:

The charging alternator’s amperage output should be between
20% and 35% of the battery bank size in Amp Hours.
e.g. 220AH bank = 44 - 77A alternator

NOTE: Alternator size must not exceed 140A, or 125A if alter­nator is “hot rated” with a 3 stage regulator

Start Batt Positive + (Large stud marked red): Connects to the

battery (Live) side of the Start Battery Isolator Switch

House Batt Positive + (Large stud): Connect to the battery (Live)
side of the House Battery Isolator Switch

Negative (Black wire): Connect to battery negative (ensure both
battery banks share common negative, see diagram)

Optional Remote LED indicator output (Orange sticker on
circuit board):

Cut silicon potting from above the orange sticker on the circuit
board. Remove the orange sticker and solder a wire to solder-pad
on the circuit board. Repair the potting with either silicon sealer,
silicon grease, or marine grease. Connect the soldered wire to
negative leg of LED, connect the LED positive leg to fused 12V
positive supply. For 24V supply, use a 2.2K (1/4W) resistor on posi­tive supply.

Optional Ignition Control/Storage Mode (red wire):

Cut end of the red looped wire ( end closest to red dotted “Start Batt
Positive +” stud) where it joins the PCB/potting, connect the remain­ing tail to the ignition terminal on the engine ignition/start switch. With
this feature selected the DVSR will only operate when the ignition
key is in the “ON” position (i.e. engine running). With the ignition
switch “OFF”, current draw of the DVSR will be zero Amps.

12V DC 24V DC

13.4V DC 26.8V DC

12.8V DC 25.6V DC

Amps

Voltage

Drop

(%)

Cable

Size

mm²

Cable

Size

AWG

DVSR Power Supply:

The DVSR takes its power supply from the red paint marked stud
(Start Batt Positive +) for standard installations. When the optional
Ignition Control/Storage installation is chosen, the DVSR power
supply is supplied via the fused secondary supply and switch, to
the DVSR’s red looped wire. With the switch (or
ignition switch) turned off, the DVSR cannot activate.

12/24 Volt Selection, and First Powering:

When the DVSR is first powered, it will sample the power supply
then decide whether to enter 12 volt (7-15.9 volts), or 24 volt (16
– 32 volts) mode. LED will flash rapidly while this occurs. Please
double check voltage in case batteries are flat, or another power
source (e.g. solar panel) is affecting the voltage. Once the 12 or
24 volt mode is selected, the DVSR will remain in this mode until
power is disconnected.

LED codes:
OFF: DVSR is disengaged, battery banks are not connected
ON: The DVSR is engaged, battery banks are combined
Brief ash every 5 seconds: DVSR is disengaging
Fast ash: System voltage is either too high or too low,

check electrical system.

Wiring Diagrams
DVSR Conections

House Batt Positive + (Tinned stud)
Orange sticker (Remote LED connection point)
Start Batt Positive + (Tinned stud)
Black wire - (Negative)
Red wire (Ignition control/Storage mode)

-

BATTERY

START

+

PRO INSTALLER

FUSEHOLDER

OPTIONAL

BEP START BATT

ISOLATOR

OPTIONAL SWITCH FOR

IGNITION OR STORAGE

MODE CONTROL

FUSE

ENGINE

DVSR

LOOP

RED

EMERGENCY

ISOLATOR

PARALLEL

HOUSE BATT

POSITIVE +

BLACK WIRE

STORAGE MODE

CONTROL

BEP

START BATT

POSITIVE +

AND JOIN OTHER END

OPTIONAL CUT HERE

FOR IGNITION OR

SWITCH

PANEL

BATTERY

HOUSE

PRO INSTALLER

FUSEHOLDER

OPTIONAL

ORANGE

OPTIONAL

-

LED

+

BILGE PUMP

COCKPIT

SPARE

LIGHT

-

+

+ -

LIGHTS

LIGHTS

CABIN

POS BUS

NAVIGATION

ANCHOR

LIGHTS

NEG BUS

BEP HOUSE BATT

ISOLATOR

CSP6

Optional Storage Mode:

Cut the red looped wire (as detailed above in ‘Ignition Control’) then
connect to the output from an ON/OFF switch. Connect the input of
the switch to a fused positive supply (+ 8-32V DC). With the switch
in the ON position the DVSR will operate as normal. With the ON/
OFF switch OFF, the DVSR will not operate and the DVSR current
draw will be zero Amps.

Example System: NOTE – This diagram is a guide only showing
DVSR connections and not intended as a full electrical systems
wiring diagram.