CalAmp TTU-2820 User manual

TTU-2820™
Hardware and Installation
Guide
IMPORTANT: DO NOT INSTALL OR USE THE SOFTWARE OR DOCUMENTATION
UNTIL YOU HAVE READ AND AGREED TO THE LICENSE AGREEMENT AND
REVIEWED THE LIMITED WARRANTY AND REGULATORY INFORMATION.
[edit][top] 1 Introduction
Welcome to the TTU-2820™ Hardware and Installation Guide. This manual is intended to give
you information on the basic setup and installation of the CalAmp TTU-2820™ product(s)
including hardware descriptions, environmental specifications, wireless network overviews and
device installation.
[edit][top] 1.1 About This Manual
The TTU-2820™ is one of the most flexible economy mobile tracking hardware products
available. In order to accurately describe the functionality of these units we have broken
this manual into the following sections:
System Overview –A basic description of a CalAmp TTU-2820™ based
tracking system. This includes a description of roles and responsibilities of each
of the CalAmp components as well as a brief overview of the wireless data
technologies used by the TTU-2820™.

Hardware Overview –Describes the physical characteristics and interfaces of
the TTU-2820™.
Installation and Verification –Provides guidance for the installation of the
TTU-2820™ in a vehicle and instructions on how to verify the installation is
performing adequately.
[edit][top] 1.2 About The Reader
In order to limit the size and scope of this manual, the following assumptions have been
made about the reader.
You are familiar with GPS concepts and terminology
You have some experience with installing equipment in vehicles
You are familiar with the use of AT Commands
You are familiar with the use of terminal programs such as HyperTerminal or
PuTTY
[edit][top] 1.3 About CalAmp
CalAmp is a leading provider of wireless communications products that enable
anytime/anywhere access to critical information, data and entertainment content. With
comprehensive capabilities ranging from product design and development through
volume production, CalAmp delivers cost-effective high quality solutions to a broad
array of customers and end markets. CalAmp is the leading supplier of Direct Broadcast
Satellite (DBS) outdoor customer premise equipment to the U.S. satellite television
market. The Company also provides wireless data communication solutions for the
telemetry and asset tracking markets, private wireless networks, public safety
communications and critical infrastructure and process control applications. For
additional information, please visit the Company’s website at www.calamp.com.
[edit][top] 1.4 About the CalAmp Location Messaging Unit-TTU-2820™
The CalAmp Location and Messaging Unit-TTU-2820™ (TTU-2820™) is a mobile
device that resides in private, commercial or government vehicles. The TTU-2820™ is a
single box enclosure incorporating a processor, a GPS receiver, a wireless data modem,
and a vehicle-rated power supply. The TTU-2820™ also supports inputs and outputs to
monitor and react to the vehicular environment and/or driver actions.

Flexibility
The TTU-2820™ features CalAmp's industry leading advanced on-board alert engine that
monitors vehicle conditions giving you the most flexible tracking device in its class. The
PEG™ (Programmable Event Generator) application supports hundreds of customized
exception-based rules to help meet customers' dynamic requirements. Customers can
modify the behavior of the device to meet with a range of applications preprogrammed
before shipment or in the field. Combining affordability and device intelligence with your
unique application can give you distinct advantages over your competition.
Over-the-Air Serviceability
The TTU-2820™ also incorporates CalAmp's industry leading over-the-air device
management and maintenance system software, PULS™ (Programming, Updates, and
Logistics System). Configuration parameters, PEG rules, and firmware can all be updated
over the air. Our web-based maintenance server, PULS™ scripts, and firmware, can all
be updated over-the-air. PULS™ offers out-of-the-box hands free configuration and
automatic post-installation upgrades. You can also monitor unit health status across your
customers' fleets to quickly identify issues before they become expensive problems.
[edit][top] 2 System Overview
[edit][top] 2.1 Overview
The entire purpose behind a fleet management system is to be able to remotely contact a
vehicle, determine its location or status, and do something meaningful with that
information. This could include displaying the vehicle location on a map, performing an
address look-up, providing real-time driving directions, updating the vehicles ETA,
monitoring vehicle and driver status or dispatching the vehicle to its next pick up.
These functions, of course, are completely dependent on the capabilities of the vehicle
management application. The role of the CalAmp TTU-2820™ is to deliver the location
information when and where it is needed.
A typical fleet management system based on a CalAmp device includes the following
components:
A wireless data network
An TTU-2820™
Host Device (GPS NMEA only)
An LM Direct™ communications server
Backend mapping and reporting software which typically includes mapping and
fleet reporting functions
PULS™
LMU Manager™

Basic System Architecture
[edit][top] 2.2 Component Descriptions
[edit][top] 2.2.1 Wireless Data Network
The Wireless Data Network provides the information bridge between the LM Direct™
server and the TTU-2820™. Wireless data networks can take a variety of forms, such as
cellular networks, satellite systems or local area networks. Contact the CalAmp sales
team for the networks available to the TTU-2820™.
[edit][top] 2.2.2 TTU-2820™

The TTU-2820™ is responsible for delivering the location and status information when
and where it is needed. Data requests mainly come from the following sources:
PEG™ script within the TTU-2820™
A location or status request from the LM Direct™ server
A location or status request from LMU Manager
An SMS request made from a mobile device such as a customer’s cell-phone
In some cases, it is necessary to run an application in the vehicle while it is being tracked
by the backend software. Such examples could include instant messaging between
vehicles or a central office, in-vehicle mapping or driving directions, email or database
access. In most of these cases you will be using the TTU-2820™ as a wireless modem as
well as a vehicle-location device.
[edit][top] 2.2.3 LM Direct™ Server
LM Direct™ is a CalAmp proprietary message interface specification detailing the
various messages and their contents the TTU-2820™ is capable of sending and receiving.
This interface allows System Integrators to communicate directly with TTU-2820's™.
Please refer to the LM Direct Reference Guide for details.
[edit][top] 2.2.4 Backend Software
Backend software is a customer provided software application. Regardless of its purpose,
one of its primary functions is to parse and present data obtained from the LM Direct™
server. This allows the application to do any of the following:
Display location database on reports received from the TTU-2820™ in a variety
of formats
Present historic information received from the TTU-2820™, typically in a
report/chart style format
Request location updates from one or more TTU-2820s™
Update and change the configuration of one or more TTU-2820s™
[edit][top] 2.2.5 PULS™
PULS™ (Programming, Update and Logistics System) is CalAmp’s web-based
maintenance server offering out-of-the-box hands free configuration and automatic post-
installation upgrades. PULS™ provides a means for configuration parameters, PEG
scripts, and firmware to be updated Over-The-Air (OTA) and allows CalAmp customers

to monitor unit health status across your customers’ fleets to quickly identify issues
before they become expensive problems.
[edit][top] 2.2.6 LMU Manager™
LMU Manager is the primary configuration tool in the CalAmp system. It allows access
to almost every feature available to the TTU-2820™. Unlike the backend software, it has
the option of talking directly to an TTU-2820™ or making a request forwarded by the
LM Direct™ server.
For further details on using LMU Manager, please refer to the LMU Manager Users
Guide.
[edit][top] 3 Hardware Overview
[edit][top] 3.1 Location Messaging Unit-TTU-2820™
[edit][top] 3.1.1 TTU-2820™ Handling Precautions
Electrostatic Discharge (ESD)
Electrostatic discharge (ESD) is the sudden and momentary electric current that flows
between two objects at different electrical potentials caused by direct contact or induced
by an electrostatic field. The term is usually used in the electronics and other industries to
describe momentary unwanted currents that may cause damage to electronic equipment.
ESD Handling Precautions
ESD prevention is based on establishing an Electrostatic Protective Area (EPA). The
EPA can be a small working station or a large manufacturing area. The main principle of
an EPA is that there are no highly charging materials in the vicinity of ESD sensitive
electronics, all conductive materials are grounded, workers are grounded, and charge
build-up on ESD sensitive electronics is prevented. International standards are used to
define typical EPA and can be obtained for example from International Electro-technical
Commission (IEC) or American National Standards Institute (ANSI).
This ESD classification of the sub assembly will be defined for the most sensitive
component, therefore the following classifications apply:
Class 1B –Human Model (< 1 kV)
Class M1 –Machine Model (< 100V)

When handling the TTU-2820’s™ main-board (i.e. sub assembly) by itself or in a partial
housing proper ESD precautions should be taken. The handler should be in an ESD safe
area and be properly grounded.
GPS Ceramic Patch Handling
When handling the sub assembly it may be natural to pick it up by sides and make
contact with the antenna boards. In an uncontrolled ESD environment contact with the
center pin of ceramic patch antenna can create a path for electrostatic discharge directly
to the GPS Module. The GPS Module is very sensitive to ESD and can be damaged and
rendered non-functional at low levels of ESD.
One should avoid contact with the center pin of the patch during handling. The Factory
will be placing a protective layer of Kapton® tape over the patch element to eliminate
this ESD path.
Packaging
Anytime the sub assembly is shipped and it is not fully packaged in its final housing it
must be sealed in an ESD safe bag.
Electrical Over-Stress (EOS)
The GPS receiver can be damaged if exposed to an RF level that exceeds its maximum
input rating. Such exposure can happen if a nearby source transmits an RF signal at
sufficiently high level to cause damage.
Storage and Shipping
One potential source of EOS is proximity of one TTU-2820™ GPS Antenna to another
TTU-2820™ GSM Antenna. Should one of the units be in a transmit mode the potential
exists for the other unit to become damaged. Therefore any TTU-2820™ GPS Antenna
should be kept at least four inches apart from any active TTU-2820™ GSM Antenna or
any other active high power RF transmitter with power greater than 1 Watt.
[edit][top] 3.1.2 Battery Back-up devices
Please properly dispose of the battery in any of the CalAmp products that utilize one, do
not just throw used batteries, replaced batteries, or units containing a back-up battery into
the trash. Consult your local waste management facility for proper disposal instructions.

[edit][top] 3.1.3 Environmental Specifications
The TTU-2820™ is designed to operate in environments typically encountered by fleet
vehicles, including wide temperature extremes, voltage transients, and potential
interference from other vehicle equipment.
To ensure proper operation in such an environment, the TTU-2820™ was subjected to
standard tests defined by the Society of Automotive Engineers (SAE). The specific tests
included temperature, shock, vibration, and EMI/EMC. These tests were performed by
independent labs and documented in a detailed test report. In accordance with Appendix
A of SAE J1113 Part 1, the Unit is considered a “Functional Status Class B, Performance
Region II” system that requires Threat Level 3 Testing.
The following shows the environmental conditions the LMU is designed to operate in and
the relevant SAE tests that were performed. No formal altitude tests were conducted.
Size
4.3" long x 3.2" wide x 1.6" high
110 mm long x 80m wide x 40mm high
Weight
9.6 oz (272 g)
Operating Temperature
-30° C to +75° C
-10° C to +60° C (When using Internal Battery Power)
Storage Temperature
-40° C to +85° C
0° C to +30° C (Long Term w/Internal Battery)
Internal Battery Charging Temperature
+5° C to +45° C
Humidity
0% to 95% relative humidity, at 50° C non-condensing
Shock and Vibration
SAE Test: SAE J1455 Compliant
Mil Standard 202G and 810F Compliant
Ground vehicle environment with associated shock and vibration
Electromagnetic Compatibility (EMC/EMI)
SAE Test: SAE J1113 Parts 2, 12, 21 and 41 Compliant
FCC Part 15B Compliant
Industry Canada Compliant
EMC compliant for a ground vehicle environment
Operating Voltage Range
9 –30VDC
Back-up Battery
3.8Ah mAh
4 Hour Charge Time
Power Consumption
Active Standby < 70mA at 12VDC

Radio Active Sleep < <TBD> at 12VDC
Deep Sleep < 2mA at 12VDC
GPS
50 channel WAAS capable GPS Receiver
2.5m CEP (with SA off)
-162 dBm tracking sensitivity
Communications (Comm)
Data Support
SMS, GPRS, CDMA 1xRTT or HSPA packet data
GSM/GPRS Quad-Band
850/900/1800/1900 MHz
GSM/GPRS Output Power
Class 4 (2 Watts) 850/900 bands
Class 1 (1 Watt) 1800/1900 bands
CDMA Dual-Band
800/1900 MHz
CDMA Output Power
800: +24dBm
1900: +24dBm
HSPA/UMTS Dual-Band
900/2100 MHz (bands VIII, I) or
850/1900 MHz (bands V, II)
3GPP release 6
5.6 Mbps upload, 7.2 Mbps download
GSM/GPRS Fallback
850/900/1800/1900 quad-band
GPRS class 12, EDGE MCS1-MCS9
RoHS Compliant
[edit][top] 3.2 TTU-2820™ Connectors
[edit][top] 3.2.1 Primary Connector
The TTU-2820™ uses 12 22AWG leads for its power and I/O connections. These leads
are mapped as follows:
Wire
Signal
Name
Description
Color
Input or
Output
1
GND
Ground
Black
Ground
2
VCC
Primary Power
Red
Input
3
IN-0
Input 0 –Ignition
White
Input
4
IN-1
Input 1 –Digital Input
Blue
Input
5
IN-2
Input 2 –Digital Input
Orange
Input

6
OUT-0
Ouput 0 –Starter Disable Relay
Driver
Green
Ouput
7
OUT-1
Ouput 1 –Digital Output
Brown
Ouput
8
OUT-2
Ouput 2 –Digital Output
Yellow
Ouput
9
SER_OUT
Serial Output
Green\Black
Output
10
SER_IN
Serial Input
Blue\Black
Input
11
1BB
1-Bit Bus Data Line
White\Blue
Input
12
ADC
ADC Input
Pink
Input
TTU-2820™ Power and I/O leads
[edit][top] 3.2.2 Serial Adapter
To add a host serial adapter to the TTU-2820™ there is 1 additional part:
Part Number 134074:Serial Adapter.
To use this part, simply connect the following wires together on the screw block - red to
red, black to black, orange to blue/black and yellow to green/black. Then connect the
DB9 connector to your serial port.
[edit][top] 3.2.3 Accessories
See the Harness Diagrams page for more information on LMU accessories, and supported
products table.
[edit][top] 3.3 GPS Receiver

The TTU-2820™’s GPS receiver has the following specifications:
50 channel GPS receiver
Accuracy: 2.5 meter CEP (with SA off)
-162dBm Tracking Sensitivity
[edit][top] 3.4 I/O Descriptions
The TTU-2820™ provides the following I/O:
Digital Inputs
Input 0: Ignition Sense (Always biased low)
Input 1: Generic Digital Input (high or low bias per S-158)
Input 2: Generic Digital Input (high or low bias per S-158)
Input 3: Not Available
Input 4: Not Available
Input 5: Motion Sensor (low = no motion, high = motion)
Input 6: Power Switch State (low = external power, high = internal battery)
Input 7: Battery Voltage Critical Sensor ( low = VBatt ok, high = VBatt low.
3500mV threshold)
Input 8: High Temperature Sensor (low = below Temp Threshold, high = above
Temp threshold. Temp Threshold = 300)
Analog to Digital Inputs
A/D 0: External Power Supply Monitor
A/D 1: Generic External Analog to Digital Input
A/D 2: GPS Antenna Monitor
A/D 3: uP Temperature
A/D 4: uP Voltage
A/D 5: Battery Voltage
A/D 6: Temperature Sensor
A/D 7: Vcc Sys
Outputs:
Output 0: Standard Open Collector Relay Output
Output 1: Standard Open Collector Relay Output
Output 2: Standard Open Collector Relay Output
Output 3: Not Available
Output 4: Power Supply Switch (cleared = switch to external power, set = switch
to internal power)
Output 5: Enable/Disable Battery charging (cleared = enable battery charging, set
= disable battery charging)

[edit][top] 3.4.1 Motion Sensor Input
The TTU-2820™ supports an internal motion sensor as one of its discreet inputs. In this
case, the TTU detects motion when the input is in the High state. If the TTU does not
detect motion, then the input will be in the Low state. No external connections are
required for this functionality to be operational.
[edit][top] 3.4.2 Power State Input
The TTU-2820™ can detect if it’s using external power or if it’s using its internal back-
up battering. If the TTU-2820™ is using external power, this input will be in the Low
state. If they have switched to the internal battery, then the input will register in the High
state.
[edit][top] 3.4.3 Battery Voltage Critical Input
The TTU-2820™ has a built in low battery threshold of 3500mV, which is tied to a
discreet input. If the battery level is above the threshold, then the input is in the Low
state. If the battery level is below the threshold, the input will be in the High state.
[edit][top] 3.4.4 High Temperature Input
The TTU-2820™ has a built in high temperature threshold of 60° C. If the internal
temperature of the TTU is above this value, then the input will be in the High state. If the
TTU’s temperature is below this value, then the input will be in the Low state.
[edit][top] 3.4.5 Ignition and Inputs
The TTU-2820™ provides up to 5 external inputs and one internal. The external inputs
are protected from typical vehicle transients and can be directly connected to most
vehicle level logical inputs from 4 volts up to the vehicle power input level (typically 12
VDC). Their input impedance is approximately 10kΩ. One of these inputs is dedicated to
sensing the vehicle’s ignition status to provide for flexible power management. The other
two inputs may be used to sense vehicle inputs such as cooling unit operation, a hidden
driver “Panic” switch, taxi on-duty/off-duty meter status or many others.

The ignition input is pulled to ground through the 10k resistance, where the other inputs
can either be normally High (i.e. pulled to +12v through a 10kΩ resistor) or Low (i.e.
pulled to ground through a 10kΩ resistor). Input 1 is always biased low, while inputs 2-4
are biased high. The diagrams below show how to connect the inputs in both a high and
low-biased configuration:

Sample Input Wiring
[edit][top] 3.4.6 Outputs
The TTU’s outputs are designed to drive external relays. These outputs provide a high-
current, open-collector driver that can sink up to 150 mA each. These drivers may be
used to drive external relays that can then control vehicle functions such as door locks,
fuel shut-off valves, sirens and lights. If additional current is required to drive the relays,
external circuitry can be added to source the current. This diagram is a typical use of an
output to drive a relay.
Sample Relay Wiring
External vs Internal Power Switch
This output allows the TTU to switch between power sources when certain conditions are
met (e.g. low power on the currently selected supply). If this output is set then the TTU
will use its internal battery as its power supply. If this output is cleared, the TTU will use
the external power supply.
By default, this output is cleared so the TTU-2820™ will operate off external power.
Enable / Disable Battery Charging
This output allows the TTU to enable or disable the charging of its internal battery. If this
output is set then the TTU will stop charging the internal battery. If this output is cleared,
the TTU will charge the internal battery.
By default, this output is cleared (i.e. battery charging enabled)

[edit][top] 3.4.7 Status LEDs
The TTU-2820™ is equipped with two Status LEDs, one for GPS and one for COMM
(wireless network status). The LEDs use the following blink patterns to indicate service:
LED #1 (Comm LED - Orange) Definitions
Condition
LED 1
Modem Off
Off
Comm On - Searching
Slow Blinking
Network Available
Fast Blinking
Registered but no Inbound Acknowledgement
Alternates from Solid to Fast Blink every
1s
Registered and Received Inbound
Acknowledgement
Solid
LED #2 (GPS LED - Green) Definitions
Condition
LED 2
GPS Off
Off
GPS On Slow
Blinking
GPS Time Sync
Fast Blinking
GPS Fix
Solid
TTU-2820™ LED Positions