This document provides a technical specification for a park brake and tipper alarm device. It describes the device's features, wiring details, functions of the park brake alarm and tipper alarm, electrical and mechanical parameters, and revision history. The device is intended to warn drivers if they try to exit a vehicle without engaging the park brake or if the tipper is raised while the vehicle is moving.

1. Googolplex Electric Company Limited
Park Brake / Tipper Alarm
Technical Specification
(Preliminary Preview)
Rimsky Cheng
28/10/2013

2. Table of Contents
Introduction..........................................................................................................................................4
Device Overview.............................................................................................................................4
Features............................................................................................................................................5
Wiring...................................................................................................................................................6
Wiring Description...........................................................................................................................6
Wiring Colour..................................................................................................................................7
Typical Connection (Park Brake Alarm).........................................................................................8
Typical Connection (Tipper Alarm).................................................................................................8
Detail Description.................................................................................................................................9
Park Brake Alarm Function.............................................................................................................9
Tipper Function (Co-exist with Park Brake Alarm Function).........................................................9
Electrical Parameters..........................................................................................................................10
Mechanical Parameters.......................................................................................................................11
Revision History............................................................................................................................12

4. Introduction
Device Overview
Park Brake / Tipper Alarm is a low cost, basic safety device intended as a warning system to alarm
the driver in case:
1. They try to open the door and exit without setting their park brake ON;
2. The truck is moved forward or reverse with the Tipper Body raised..
It is designed to be very simple and easy to install, but operate in intelligent way.
The device can be further re-programmed in case there are further customer requirements.
Park Brake / Tipper Alarm Technical
Specification
0.0.2 24/04/2013

5. Features
· 12V / 24V Nominal Input (+9 to +32V Input Range)
· Reverse Polarity Protection
· Tipper Proximity Switch Input (PNP) (switching positive)
· Ability to sense Park Brake Input for High Active / Low Active
· Ability to sense the Door Switch Input for High Active / Low Active
· 2 External Switch to Ground Outputs (Current Limit 1A Each)(to drive a relay or LED)
· Compact Size
· Easy to install
Park Brake / Tipper Alarm Technical
Specification
0.0.2 24/04/2013

6. Wiring
Wiring Description
Pin
Number
Wire
Colour
Pin
Description
Details Remarks
1 Red B+ Battery Positive Input +9 to +32V
2 Black B- Battery Negative Input
3 Yellow Ign.Sw.H Tipper Proximity Switch reference
signal
Active High
4 Green Prk.Br.H Park Brake Switch Input Active High
5 Orange Prk.Br.L Park Brake Switch Input Active Low
6 Brown Dr.Sw.L Door Switch Input Active Low
7 Dark Blue Dr.Sw.H Door Switch Input Active High
8 White Ex.Buzzer.2 External Output 2
(Output to energize Air Brake relay)
Switch to Ground
9 Grey Ex.Buzzer.1 External Output 1
(Park Brake Alarm External Buzzer /
Horn Relay)
Switch to Ground
Park Brake / Tipper Alarm Technical
Specification
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7. Wiring Colour
Park Brake / Tipper Alarm Technical
Specification
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8. Typical Connection (Park Brake Alarm)
Typical Connection (Tipper Alarm)
Park Brake / Tipper Alarm Technical
Specification
0.0.2 24/04/2013

9. Detail Description
Park Brake Alarm Function
The Installer needs to connect the Door Switch Signal and Park Brake Signal onto the Park Brake
Alarm in order for the Park Brake Alarm to function correctly. Separate Inputs are provided for
High Active and Low Active Input, and installer should only need to connect one of them.
(Depending on how the vehicle is wired. Eg; switching to ground or switching to positive)
If the Door Switch is triggered (Door Opened) while the Park Brake is OFF (released), the on
board buzzer will immediately sound for 5s before BOTH alarm (Ex.Buzzer.1 and Ex.Buzzer.2) is
activated.
Applying the Park Brake will disable BOTH buzzer and alarm immediately., the alarms latch on
unless the park Brake is applied. It is good practice to apply the park brake BEFORE opening the
door.
Tipper Function (Co-exist with Park Brake Alarm Function)
The installer should mount the Tipper Proximity Switch (PNP) onto the truck body so that it senses
when the tipper body is resting in the down position. Make sure the proximity switch is protected
from harm’s way and foreign matter that may obstruct or damage the sensor. Connect the wiring as
per the instructions.
Applying the Park Brake will engage the Air Brake output, while releasing the Park Brake will
release the Air Brake also. The onboard buzzer will sound if the driver releases the park brake and
the tipper is not fully down.
Note: the proximity sensor will show a red LED when it is powered up and is sensing metal within
its sensing range.
Park Brake / Tipper Alarm Technical
Specification
0.0.2 24/04/2013

10. Electrical Parameters
Supply Voltage +9V to +32V Nominal
Input Voltage 0V to +24V
Output Current (Each Output) 1A MAX
Park Brake / Tipper Alarm Technical
Specification
0.0.2 24/04/2013

11. Mechanical Parameters
Operating Temperature -20C to 85C Temperature
Storage Temperature -40C to 85C Temperature
Dimensions 73mm (Length) x 38mm (Length) x 25mm
(Depth)
Park Brake / Tipper Alarm Technical
Specification
0.0.2 24/04/2013
53.9mm
24.6mm
72.6mm
60.5mm
38.1mm

12. Revision History
Revision Author Description Date
0.0.1 Rimsky Cheng Preliminary Preview 16/04/2013
0.0.2 Rimsky Cheng Add Tipper Description 23/04/2013
0.0.3 Rimsky Cheng Review Information 28/10/2013
Park Brake / Tipper Alarm Technical
Specification
0.0.2 24/04/2013