FlexMod™ DUAL OUTPUT VOLTAGE SENSING RELAY

FlexMod™ DUAL OUTPUT VOLTAGE SENSING RELAY
Commercial Vehicle Product Datasheet
FlexMod™ DUAL OUTPUT VOLTAGE SENSING RELAY & TIMER
Specifications Overview
Description
Voltage Rating:
12-24V DC (Auto Ranging)
Humidity:
0 to 90%RH
Vibration: 10-500Hz
Operating Temp:
-40° to +85°C
Ingress Protection:
IP67
Dimensions: 4.0" x 2.70" x 1.31"
Web Resources
Controls two outputs, monitors voltage and time on both to
protects battery voltage two ways. After the vehicle engine is
turned off, the DVSRT shuts down the auxiliary loads based
on two factors - battery voltage, and time after shutdown.
Download technical resources at:
littelfuse.com/FlexMod
Features and Benefits
Ordering Information
• Ideal for emergency vehicles and many other applications
that need protection from the starting battery from being
drained by auxiliary loads.
PART NUMBERS
• Preserves starting power; eliminates downtime and jump
starts due to dead batteries. Simultaneous time and
voltage monitoring protects starting.
• Dual output unit (controls two circuits) permits
prioritization of load-shedding.
• Monitors voltage and time simultaneously, providing double
the protection to batteries. Battery will not be drained if
battery voltage gets low before timer has run out.
BOXED
48742
–
DESCRIPTION
HARNESS
INCLUDED
Dealer-Programmable Unit
No
Accessories
• 10A rating means that the unit can handle many loads
directly or drive a relay or solenoid for higher amperages.
• Auto-ranging to automatically sense the voltage of the
system (12 or 24V) and selects the presets appropriate to
that voltage.
BULK
PART NUMBERS
DESCRIPTION
12805
FlexMod Harness
FlexMod™ Dimensions
• Waterproof, dustproof and vibration-proof. Sealed to IP67
so it can mount on a vehicle even in places where roadsplash is a problem.
• Ultra low 1mA standby current means minimal battery
drain – especially valuable when vehicle is in storage or
not in use.
• Rated for more than 1,000,000 on-off cycles – unit
operates for the lifetime of the vehicle. Solid state
technology gives long life and low maintenance.
• Compact design (4 x 3 x 1”) – Uses less space; mounts
outside or inside. Saves money by eliminating other
hardware, and provides better wire routing.
Datasheet Replaces Hotfeed Number D-644
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© 2017 Littelfuse Commercial Vehicle Products
Rev: 053117
Commercial Vehicle Product Datasheet
FlexMod™ DUAL OUTPUT VOLTAGE SENSING RELAY & TIMER
Electrical Characteristics
CHARACTERISTIC
MIN
UNITS
NOTES
11.5/23.0
Volts
For 12V/24V systems
Output 1 Disconnect Timer
(Factory Standard)
60
Minutes
Output off delay after input de-activation
Output 1 Overcurrent Protection
15
Amps
System disconnects load after one second of excessive current
12.1/24.2
Volts
For 12V/24V systems
15
Minutes
Output off delay after input de-activation
-
Amps
Output not protected
Output 1 Disconnect Voltage
(Factory Standard)
Output 2 Disconnect Voltage
(Factory Standard)
Output 2 Disconnect Timer
(Factory Standard)
Output 2 Overcurrent Protection
Key Off Timer Programmable Limits
TYPICAL
0.1
MAX
1080
Minutes
Programmable Timer limits
12/24
32
Volts
Operating Voltage is the system voltage
1
2
Milli-Amp
Stand-by current
Output 1 Load Current (Pin 3)
10
Amps
At +85°C
Output 1 Load Current (Pin 6)
1080
Amps
At +85°C
Operating Voltage
9
Quiescent Current
Environmental Specifications
CHARACTERISTIC
PARAMETER
NOTES
Operating Temperature Range
-40° to +85°C
-40° to +185°F
10A at 85°C
IP67
Per IEC 529
Ingress Protection
Humidity
0 to 90%RH
Vibration
10-500Hz
Per SAE J1455
Shock
Per SAE J1455
Thermal Shock
Per SAE J1455
Inductive Transient
Load Dump
+/- 600V
Per SAE J1455
+150V
Per SAE J1455
Installation Configurations
Visit Littelfuse.com for the most up-to-date product information. Littelfuse products are designed for specific applications and should not be used for any purpose (including, without limitation, automotive
applications) not expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in
applicable Littelfuse product documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable
Littelfuse product documentation.
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© 2017 Littelfuse Commercial Vehicle Products
Rev: 053117
Commercial Vehicle Product Datasheet
THE FlexMod™ FAMILY OF PRODUCTS
Easy wiring with
sealed connector
Two outputs &
two inputs
48610 Low Voltage Disconnect
The FlexMod unit preserves battery charge and protects
battery banks by automatically disconnecting loads when
battery voltage drops to a critical level. Part number 48710 is
dealer-programmable.
48636 Lighting Timer
Ultra-low
standby current
Sealed to IP67. Can be
mounted anywhere
The FlexMod unit prevents the internal lights inside a
trailer from being left on and draining the battery. Vehicle
operator operates a momentary switch which turns lights
on, allowing safe operation inside the cargo compartment.
After 20 minutes the FlexMod flashes the lights and gives
the operator increasingly urgent warnings to either exit the
cargo compartment or reactivate the timer before the lights
go out. Part number 48736 is dealer-programmable.
Compact unit
3” x 4” x 1”
The FlexMod™ family is a series of small, robust electronic
modules. They have two inputs (one analog and one digital)
and two solid state outputs (one 10A, one 200mA) that can
be programmed to do almost any job.
48541 Electronic Voltage Sensing
Relay & Timer
We have created some standard units (see below) to meet
specific application needs.
The FlexMod unit monitors both battery voltage and ignition
status, shutting down non-critical loads when the cutoff
voltage is reached, or at the set time after the ignition is
turned off. It is a timer and voltage sensor in one easy-toconnect unit. Part number 48741 is dealer-programmable.
• Simple wiring, accepts snap-in standard sealed connector
– unit is easy to install. Part number with -01 suffix
includes wiring harness.
• FlexMod is auto-ranging – automatically senses the
voltage of the system (12 or 24V) and selects the presets
appropriate to that voltage. Single unit means less stock
and fewer SKUs.
Dealer Programming Of Units
• Ultra low 1mA standby current means minimal battery
drain – especially valuable when vehicle is in storage or
not in use.
• Factory programmable unit is highly versatile: with a broad
range of presets available to match any special application.
• Rated for more than 1,000,000 on-off cycles – unit
operates for the lifetime of the vehicle. Solid state
technology gives long life and low maintenance.
• Provides overvoltage and overcurrent protection to every
direct load in that circuit– gives extra levels of protection.
• Small lightweight sealed design – Uses less space;
mounts outside or inside. Saves money by eliminating
other hardware, and provides better wire routing..
FlexMod is a highly versatile unit that can be programmed
by dealers, and can be tailored to the specific applications
of customers. Parameters such as time, voltage, and current
limits are easy to customize, using straightforward
on-screen options.
Our programming unit plugs into your computer, and to a
FlexMod, which can be programmed within minutes. The
system has the advantage of accessing the FlexMod via the
integral sealed connector. Unlike competitive products, it is
not an invasive process which compromises the waterproof
integrity of the unit.
Contact Littelfuse or one of our official dealers about
programmable products.
48540 Smart Battery Isolator Controller
The FlexMod unit monitors two battery banks and controls
one or more relays or contactors to make sure starting power
is protected by isolating the starting and auxiliary battery
banks. Part number 48740 is dealer-programmable.
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DEALER NAME
LOCATION
PHONE NUMBER
Bert Block Associates
Grand Rapids, MI
+1 616-538-9419
Diesel Equipment
Greensboro, NC
+1 800-222-7159
Marsh Electronics
Milwaukee, WI
+1 800-926-2774
J&N
Cincinnati, OH
+1 800-366-7100
ASE Supply
Portland, OR
+1 503-288-4866
IJ Walsh
London, UK
+44 1227 769784
© 2017 Littelfuse Commercial Vehicle Products
Rev: 053117
Commercial Vehicle Product Datasheet
COMMON FlexMod™ APPLICATIONS
Littlefuse designed these units to solve problems in many industries. Here are a few of the thousands of potential applications.
Contact us with your specific application requirements.
Typical Application 1
Idle reduction for work vehicles
Use the 48610 FlexMod LVD to protect starting power,
and save fuel (and fines!) by eliminating idling. By
connecting safety signboard (or other loads) to the LVD,
the signboard can be safely run with the engine off,
without the risk of a dead battery. By connecting the horn
or external alarm to the alarm circuit, the vehicle operator
will be warned of impending shutdown.
Typical Application 2
NFPA 1901 Load Manager compliance
for fire vehicles
Program the 48710 FlexMod LVD to combine low voltage
warning and/or single circuit load management in one
unit. A second 48710 FlexMod LVD can manage other
loads, and if mounted close to the loads, will minimize
wiring runs.
Typical Application 3
Combined timer/voltage shutoff for
police vehicles
48541 FlexMod VSRT combines two functions (time
and voltage) in one small unit that opens up options for
mounting in a small space, and simplifies wiring and other
components. The FlexMod VSRT protects starting power
with simultaneous sensing of time and voltage.
Typical Application 4
Smart charging system for boats
The 48540 FlexMod Smart Isolator Controller turns an
existing solenoid charging system into a smart system.
The FlexMod protects the alternator with priority charging,
and allows shore power connected to the house battery
to charge the starting battery as well! The 48610 protects
batteries from damage.
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© 2017 Littelfuse Commercial Vehicle Products
Rev: 053117
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