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Information on New Products from Cole Hersee Company
NEW
Smart Battery Isolator
Prevents loads on auxiliary battery from
draining the starting battery
More flexible than traditional Isolators:
Works with all alternator types
Smaller, lighter, less heat generated
No diode efficiency losses
Reduces charging system workload by not
connecting auxiliary battery until primary
battery is charged to 13.2V. Lower strain
on expensive charging components extends
their useful life.
Allows bi-directional charging from alternator or from
shore/campground power charger/converter when available.
Simple installation - Connect to starting battery, auxiliary
battery, and ground.
LED status indicator.
Cole Hersee part numbers
48525
48530
85A
200A
Optional Start Assist – Momentary switch allows the auxiliary battery to assist the starting battery.
Dimensions
3.27” [83.1mm]
0.71” [18.0mm]
3.34” [85.0mm]
TO AUX
BATTERY
2.93” [74.4mm]
TO MAIN
BATTERY
WHITE: STATUS
PURPLE: BOOST
BLACK TO GROUND
1.74” [44.2mm]
Copyright
Cole Hersee Co.
D-617
Rev 00
How a Smart Batte
Normal Operation Sequence
1 When the vehicle has been running, the alternator
NO1both battery banks through the Smart Isolator.
charges
Status Light
2
Status Light
Batteries are
fully charged
Solenoid relay in
Smart Battery
Isolator
Alternator
Alternator
+
-
13.2 V
-
Main battery
+
+
House/
Auxiliary
Loads
12.7 V
Starter
When the engine is turned off, the alternator no longer supplies a charge
NO2and the loads on the batteries begin to deplete them.
to the batteries,
-
House/
Auxiliary
Loads
Starter
Main battery
opens the solenoid relay to separate the battery banks, and turns
off the status light. This protects the starting battery while allowing
NO3 battery to continue to power the auxiliary loads.
the auxiliary
+
12.7 V
Auxiliary battery
3 When batteries reach 12.7V, the Smart Battery Isolator senses it,
-
13.2 V
4
Auxiliary battery
When the vehicle is restarted, the starting battery has enough power to
crank the engine, but the auxiliary battery is significantly depleted. The
Smart Battery Isolator is open and the battery banks are separated.
NO4
Status Light
Status light is off
and Smart Battery
Isolator is open
Alternator
Alternator
+
-
13.2 V
-
House/
Auxiliary
Loads
12.7 V
Starter
Main battery
+
+
has reached 13.2V. Only now does the Smart Battery Isolator
reconnect, enabling the depleted auxiliary battery to be charged.
By not reconnecting until the main battery is charged, the
NO5
alternator
is protected from excessive loads.
13.2 V
-
House/
Auxiliary
Loads
Starter
6
Main battery
Auxiliary battery
Now both batteries are charged again.
NO6
Status Light
Batteries are
fully charged
Status light is off
and Smart Battery
Isolator is closed
Alternator
Alternator
+
-
13.2 V
-
Main battery
+
+
House/
Auxiliary
Loads
12.7 V
Starter
+
12.7 V
Auxiliary battery
5 The engine is powering the alternator, and the starting battery
-
Auxiliary battery
-
13.2 V
-
+
House/
Auxiliary
Loads
12.7 V
Starter
Main battery
Auxiliary battery
ery Isolator works
Using the Auxiliary Battery for a Start Boost
1 The main battery has been depleted and does not have enough
power to start the engine. Voltage is greater than 9.5V
BO1
2 The boost switch is pressed. It closes the Smart Battery Isolator
solenoid
for one minute. Now the power in the auxiliary battery
BO2
is available for starting.
Boost
switch
Status Light
Boost
switch
Status Light
Alternator
Alternator
+
-
13.2 V
-
+
12.7 V
Starter
Main battery
+
-
House/
Auxiliary
Loads
-
13.2 V
+
House/
Auxiliary
Loads
12.7 V
Starter
Auxiliary battery
Main battery
Auxiliary battery
BO3
3
The alternator begins to charge the batteries. After one minute
the Smart Battery Isolator reverts to the automatic mode. If the
starting battery has not reached 13.2V, it isolates the batteries
to reduce stress on the alternator. Once the main battery
reaches 13.2V, it reconnects and charges the auxiliary battery.
Boost
switch
Status Light
Alternator
+
-
13.2 V
-
+
House/
Auxiliary
Loads
12.7 V
Starter
Main battery
Auxiliary battery
Connection Schematic
Suggested Cole Hersee
part numbers:
Start Boost Switch
Remote Status Light
Remote Status Light
PL-612-R
PL-118-RC
M-326-RC
M-328-RC
House
Battery Bank
Starting Battery
Start Boost Switch
Alternator
Starter
House
Loads
Shore
Power
9216-03
55020-04
M-626-02
M-58031-07
Environmental Specifications
Per SAE J1455
Parameter
Notes
Operating temperature range
-40 to +85 °C
Operating condition
Ingress protection
IP65
Per IEC
Humidity
0 to 90% RH
Vibration
10-500Hz
per SAE J1455
Shock
per SAE J1455
Thermal shock
per SAE J1455
EMI/RF
per SAE J1455 & J1113
Terminal Torque Specifications
Battery terminals
5/16-24
50 in-lbs (5.78 Nm)
Electrical characteristics
Characteristic
Min
Normal input voltage
9V
Typical
Max
Notes
16V
Voltage range unit is guaranteed to
function within specification.
Continuous current
48525
48530
85A
200 A
Connect voltage
13.2V
After 2 minutes at this level
Disconnect voltage
12.7V
After 1 minute at this level
Quiescent current
5mA
8mA
Relay off, start signal input open
or grounded.
20 Old Colony Avenue, Boston, MA USA 02127-2467 • 617-268-2100 • Fax 617-268-9490
See our interactive product catalog at www.colehersee.com
All specifications and information is subject to change without notice.