Item
Specification
Input battery voltage range
9VDC to 16VDC for normal operation
Load dump
Load dump tolerant
Cranking voltage
Crank voltage of 6VDC for 1 second with no
reset to the MCU.
Reversed battery
The system is tolerant of a reversed battery
for a period of 1 minute. Load activation
during reversed battery is allowable.
Short Circuit
All inputs and outputs shall not be damaged
by either short circuit to battery or ground
with the exception being ground pins being
Quiescent current
There is no requirement for a specific
Loose battery terminals
Momentary interruption in power supply
(loose battery terminal). The module shall not
reset for battery dropouts less than 50ms no
Fusing
The unit is not fused. It relies on upstream
fusing.
Battery connections
6.3mm spade terminals
Total current
<20A
ARB Accessory Controller, ECU specification
Overview
The ARB Accessory Controller is a system for controlling and monitoring various vehicle accessories
such as switching on and off lights, and monitoring pressure transducers. The system is composed of
two main parts: a touch screen graphical user interface (GUI), and an electronic control unit (ECU).
The GUI provides the user with a dashboard / switchboard to display the on/off state of the
accessories and allow the user to switch them. The ECU is the brains of the system, it communicates
with the GUI, electronically switches the accessories, stores the states of all accessories. The
interface between the ECU and the GUI is USB and Bluetooth, the command structure is basic serial
messaging structure.
Scope
This covers the design of the ARB Accessories Controller ECU and gives specific technical
requirements and implementation details.
Electrical General Specifications
This covers the electrical specifications that apply to the unit as a whole.
shorted to battery.
more frequent than every 2 seconds.
Tablet and output load dropout is acceptable.
quiescent current.
Outputs
Item
Specification
Output count
25 (excluding brake PWM)
Load maximum power
5W per output
Load inductive energy
6mJ maximum It is assumed that the
Inrush current handling
Not required
Fault diagnostics
Not required
Short circuit handling
Tolerant of short circuit to ground
Short to battery
This can back feed through and power the
Proportional trailer brake PWM output
12VDC, 100W, PWM approx. 100Hz
Input count
8
Input
Voltage low
<0.5VDC
Input Voltage high
>4.5VDC
Wetting current
5mA nominally
PWM voltage tolerant
On High Beam, Low Beam and
Reverse
100Hz maximum PWM rate
Battery monitor input count
2 external and 1 internal from the
Battery monitor input range
0‐15VDC
Battery monitor accuracy
Error less than 5%
5V Analogue input count
7
5V Analogue input power feed
0.5A maximum
5V Analogue input range
0‐5VDC
USB USB2.0
USB connector type
Type A female connector
USB 5VDC charge current
1.4A maximum
RF
Bluetooth V4.0 compliant, SSP profile,
outputs primarily drive relays.
unit
Digital Inputs
Item Specification
20Hz minimum PWM rate
Analogue Inputs
Item Specification
battery in
Communications
Item Specification
Environment
Item Specification
client/slave
Temperature range ‐10C to +60C
Water proofing
Not required
Conformal coating
Not required
Enclosure
Custom plastic injected moulding
EMC susceptibility
Automotive transients present on power
Bluetooth module
Must have type test and on board antenna
EMC
CISPR 22:2009 + A1:2010 Class B (primary EMC
requirement)
AS/NZS 4268 (Bluetooth for modules on PCB
–
supply, inputs and
Certifications
Item Specification
no RF paths outside module)
FCC Part 15.19 Caution:
1. This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
(1) this device may not cause harmful interference and
(2) this device must accept any interference received, including interference that
may cause undesired operation
2. This device and its antenna(s) must not be co‐located or operating in conjunction with
any other antenna or transmitter.
3. Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user authority to operate the equipment.
IMPORTANT NOTE:
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
minimum distance 20cm between the radiator & your body.
FCC Statement in User’s Manual (for calss B)
FCC Section 15.105
“Federal Communications Commission (FCC) Statement”
This equipment has been tested and found to comply with the limits for a lass B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
ARB Product Testing
30/01/2017
Kit Contents:
1 x Controller
1 x Display
1 x USB Cable
Page 1 of 10
1 x Power Cable
1 x Interface Cable (used for ARB Air Locker & Air Compressor connectivity – sold separately)
Page 2 of 10
Running the system via USB connection:
1. Expose the connection points of the controller by pressing inward on the terminal cover and
pulling upward as below.
2. Connect the controller to 12V DC power by attaching the positive lead to terminal A1, and the
negative terminal to A2.
Note: All terminals are designated with a letter
and a number according to the diagram.
Page 3 of 10
3. Connect the USB cable between the Micro USB ‘B’ port of the display and the USB ‘A’ port of the
controller.
4. Switch on the display by long-pressing on the ON BUTTON as above. The display may take a few
minutes to boot up.
5. The ARB app should automatically launch very shortly after the display boots up.
6. Once the app loads, use 1 finger to scroll up or down on either half of the screen until you get
the ‘switchboard module’. It will look like the pic below.
Page 4 of 10
7. Long press on ‘Accessory 1’ (as below) to go to the settings page.
It should look like the pic below.
8. Press on the check box to activate Accessory 1 (with a tic mark). If it is already ticked then
nothing need be changed.
9. Press the back button (triangle on the right hand side) to return to the switchboard.
10. Using a multimeter, test for DC volts between A2 and C3. It should read zero.
Page 5 of 10
11. Turn on Accessory 1 by pressing it (short pressing only). It should highlight to indicate that it is
now ON (as below).
12. Using a multimeter, test for DC volts between A2 and C3. It should read approx. 12V.
This concludes the USB connection and function test.
Page 6 of 10
Running the system via Bluetooth connection:
1. Disconnect from USB connection with the controller by unplugging the Micro USB ‘B’
terminal from the display. The app will revert to a connection screen as it looks for another
connection.
2. Swipe down from the top border of the screen 3 times. You should now see the screen
below.
3. Press the settings button.
Page 7 of 10
4. Press Bluetooth.
5. Turn Bluetooth ON.
6. ARB GUVI should be available in the devices list. Press it to pair with the controller.
Page 8 of 10
7. Once paired you can press the back button until you get back to the app.
8. Once the app loads, scroll up or down on either half of the screen until you get the
‘switchboard module’. It will look like the pic below.
9. Using a multimeter, test for DC volts between A2 and C3. It should read zero.
Page 9 of 10
10. Turn on Accessory 1 by pressing it (short pressing only). It should highlight to indicate that it
is now ON.
11. Using a multimeter, test for DC volts between A2 and C3. It should read approx. 12V.
This concludes the Bluetooth connection and function test.
Page 10 of 10
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