Environmental Specifications

Environmental Specifications
Environmental Specifications
Characteristic
Parameter
Notes
Operating temperature range
-40° to +85°C
-40° to +185°F
100A at 85°C, 125A at 60°C
Ingress protection rating
IP67
Per IEC 529
Humidity
0 to 90%RH
Vibration
10-500Hz
Per SAE J1455
Shock
Per SAE J1455
Thermal shock
Per SAE J1455
Inductive transient
+/- 600V
Per SAE J1455
Load dump
+150V
Per SAE J1455
(1/4"–20)
50 in -lbs (5.78Nm)
Terminal Torque Specifications
Battery terminals
Electrical Characteristics
Min
Typical Max
Notes
Operating voltage (12V)
9V
12V
16V
If used with 12V DC systems
*Disconnect voltage (+12V)
*Connect voltage (+12V)
12.05V
12.95V
12.1V
13.0V
12.15V
13.05V
When voltage drops below 12.1V, system activities
the alarm for one minute, then disconnects loads.
Operating voltage (24V)
18V
24V
32V
If used with 24V DC systems
*Disconnect voltage (+24V)
*Connect voltage (+24V)
24.1V
26.0V
24.2V
26.1V
24.3V
26.2V
When voltage drops below 24.2V, system activities
the alarm for one minute, then disconnects loads.
1mA
2mA
Cicuit operating current
Maximum rated current
*Overcurrent protection
*Key-off timer
135A
System will disconnect load and sound alarm after
3 seconds of excessive current.
15 min
Optional feature. After key-off, unit will wait a set
time before activating alarm. One minute later, loads
are shut off.
* These characteristics are programmable in 48713 series LVDs.
Dimensions
Sealed 4 Pin
Connector
4.50 [114.3]
Ø0.28 [Ø7.1]
4.27 [108.6]
2 81 [53.3]
SureStart Compact Low Voltage Disconnect
TM
No more dead batteries!
Electronically senses battery level
and conserves starting power
Prolongs battery life by preventing
battery damage
Unit works with 12V or 24V DC systems
Characteristic
Quiescent current
Information on New Products from Cole Hersee
Associated Items
12804 plug & harness
58326-06 Rocker switch
58332-11 Rocker switch
55088 Toggle switch
4 [101.6]
3.11[79.0]
Littelfuse Commercial Vehicle Products • 20 Old Colony Avenue, Boston, MA USA 02127-2467
210. 621.1845 • www.colehersee.com • www.littelfuse.com
Features & Benefits
Unit disconnects non-critical loads when battery voltage
falls below threshold, reconnects when battery is recharged.
Unit is auto-ranging: identifies whether system is 12V or 24V,
and automatically establishes thresholds. One part number;
two voltages. 100A at 85ºC, 125A at 60ºC.
Part number
Eliminates dead battery service calls and lost time. Extends
battery life by preventing irreversible damage due to excessive discharge.
48513-01 LVD & harness
48513-02 LVD with harness
and 58326-06 Rocker Switch
No action is required by vehicle operator to protect the
batteries – unit automatically disconnects and reconnects,
giving operator a warning one minute before disconnect.
250mA alarm signal can drive audible or visual systems or
any large device via a relay. Optional manual override
feature.
48513 LVD
Programmable LVD
Can be mounted in harsh environments – sealed to IP67,
with sealed Deutsch connector. Solid state reliability and
resistance to vibration – replaces vulnerable conventional
solenoids. Unit exceeds one million cycles and is protected
from over-temperature, overcurrent, overvoltage, and
under-voltage. Minimal draw on battery (only 1mA standby).
Parameters to fit your application can
be custom-programmed into 48713 LVDs
by selected distributors. Contact Cole
Hersee for a list of distributors.
Protects vulnerable onboard electronics such as GPS,
phone, computer. Solid-state switching creates less
electrical noise and interference, and eliminates spikes.
48713-02 LVD with harness
and 58326-06 Rocker Switch
Littelfuse Commercial Vehicle Products
48713 LVD
48713-01 LVD & harness
D-619 Rev 02
How a Low Voltage Disconnect works
LVD simplifies your wiring
Normal Operation Sequence
The Compact LVD reduces costs by minimizing installation time and complexity, and by significantly reducing the
number of components. The small, lightweight design improves your mounting options, and eliminates mounting trays.
Reduced number of wires gives a significant boost in reliability. Solid state switching in the compact LVD protects
expensive electronic equipment by protecting from damage due to noise, electromagnetic interference and overcurrent.
1
When the vehicle has been running, the alternator
has charged the battery, and the LVD is connected.
Alternator
LVD
2
When the engine is turned off, the loads draw down the battery
until the cutoff voltage is reached.
Alternator
Ignition
LVD
Ignition
B+
Manual Switch
Ground
B+
Manual Switch
Ground
Optional
Relay
Critical
Loads
3
Battery
Non-Critical
Loads
Audible/Visual
Alarm
Alternator
Optional
Relay
Critical
Loads
Ignition alternator output - orange wire
Manual Switch - violet wire
Audible/Visual Alarm - white wire
When the cutoff voltage is reached, the LVD activates
the alarm circuit for 1 minute. Alarm can be an audible
or visual device, or if a relay is used, it can be almost
any powered device.
LVD
4
Battery
5
Battery
Alternator
LVD
Ignition
B+
Manual Switch
Ground
Audible/Visual
Alarm
Optional
Relay
Non-Critical
Loads
Critical
Loads
When the vehicle is restarted, the battery is recharged
until the connect voltage is reached. Then the LVD
automatically reconnects the non-critical loads.
6
Installation with LVD
Non-Critical
Loads
B+
Manual Switch
Ground
Critical
Loads
Audible/Visual
Alarm
If the operator does not push the Manual Switch to the B+
position during the alarm time, the LVD will disconnect,
shutting off non-critical loads. If the operator actuates the
Manual Switch, the LVD goes into a 15 minute ‘alarm snooze’
and afterwards returns to auto-sensing mode.
Ignition
Optional
Relay
Typical Installation
Battery
Audible/Visual
Alarm
Non-Critical
Loads
If the Manual Switch is put to Ground, the LVD disconnects,
and stays off until the Manual Switch is moved to the B+ position.
Typical system uses a timer delay
relay and a solenoid:
No override capability.
No operator warning.
No overcurrent protection.
Needs a separate solenoid.
LVD
Alternator
Ignition
LVD
Utilizing a single battery.
Ignition
B+
Manual Switch
Ground
Optional
Relay
Critical
Loads
Battery
Non-Critical
Loads
Connects directly into the harness via the
sealed Deutsch connector.
Eliminates splicing in locations that are
typically susceptible to water and salt ingress.
Has integral studs. No need for extra
components.
Typical Applications
Emergency Vehicle
Alternator
Easy installation, fewer components.
Road Service Truck
Lightbar
Light Board/ Sign Board/ Arrow Board
B+
Manual Switch
Ground
Audible/Visual
Alarm
Optional
Relay
Critical
Loads
Battery
Non-Critical
Loads
Audible/Visual
Alarm
LVD
Computer
Systems
Radios
Cordless Light
Battery Charger
LVD
Back-up Alarm
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