Digi M10 Technical overview and Operating and maintenance manual

Digi m10
Satellite Modem
Hardware Reference
Date: 3 July 2012
90033937_H

Copyright Notice
Digi International has prepared this manual for the use of its employees, agents, and its
customers. This manual contains proprietary information, which is protected by copyright.
Preparing derivative works or providing instruction based on this manual is prohibited without
written permission from Digi International.
All information in this manual is accurate and reliable to the best of Digi International's
knowledge. Digi International may make improvements and / or changes in this manual at any
time without prior notice.
Trademarks
The Digi m10 is a registered trademark of Digi International Inc. All other company and / or
product names mentioned in this manual are the property of their respective owners.

Document Revision History
Version Description Date
A Initial release of the new hardware reference manual 21 Sep 2009
B Extended packet information removed. Images updated. 10 Nov 2009
C Debug port termination (RX) requirements added as well as
RTS/CTS implementation section added in chapter 2. Updated Pin
descriptions in chapter 2. 18 Jan 2010
D Updated mechanical drawings and added section 2.2.2 “Host Port
with Flow Control”. Appendix D added. Industry Canada Notice
added to front matter.
20 May 2010
E Fixed error in section 2.7. 4 Nov 2010
F Fixed error in Section 6 and added Appendix E. 12 Sep 2011
G Fixed error in Section 2.2. 13 Oct 2011
H Fixed the resolution of Digi m10 Mechanical Drawing: Part D image
in Appendix A 26 Jun 2012

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Table of Contents
Digi m10....................................................................................................................................... 1-1
Satellite Modem .......................................................................................................................... 1-1
Hardware Reference................................................................................................................... 1-1
Copyright Notice......................................................................................................................... 1-2
Trademarks .................................................................................................................................1-2
Document Revision History....................................................................................................... 1-3
Table of Contents ......................................................................................................................... iv
List of Tables.................................................................................................................................. v
List of Figures................................................................................................................................ v
About This Manual......................................................................................................................... 6
Target Audience .......................................................................................................................... 6
Symbols Used in This Manual..................................................................................................... 6
Reference Documents................................................................................................................. 6
Industry Canada Notice............................................................................................................... 8
Caution......................................................................................................................................... 8
Where to Get Help....................................................................................................................... 8
1. Overview of the Digi m10...................................................................................................... 9
2. Interfaces................................................................................................................................ 9
2.1 Connector Pins............................................................................................................... 9
2.2 Serial Interface............................................................................................................. 12
2.2.1 Host Port.................................................................................................................. 12
2.2.2 Host Port (With Flow Control).................................................................................. 12
2.2.3 Debug Port............................................................................................................... 12
2.3 Power and Ground....................................................................................................... 13
2.4 Power Enable............................................................................................................... 13
2.4.1 Powering Up ............................................................................................................ 13
2.4.2 Powering Down........................................................................................................ 14
2.5 DA (Data Available)...................................................................................................... 14
2.6 RTS/CTS Implementation ............................................................................................ 15
2.7 SA (Satellite Available)................................................................................................. 15
2.8 RF Interface.................................................................................................................. 16
3. Technical Specifications..................................................................................................... 18
3.1 Environmental .............................................................................................................. 18
3.1.1 Electromagnetic Compatibility ................................................................................. 18
3.1.2 RoHS ....................................................................................................................... 19
3.1.3 Operating Temperature ........................................................................................... 19
3.1.4 Storage Temperature............................................................................................... 20
3.1.5 Operational Shock ................................................................................................... 20
3.1.6 Operational Vibration............................................................................................... 20
3.2 Electrical....................................................................................................................... 20
3.2.1 Power Design........................................................................................................... 21
3.2.2 Digital Input / Output Specifications......................................................................... 22
3.2.3 Lifespan ................................................................................................................... 22
3.3 Mechanical................................................................................................................... 22
3.3.1 Module Size............................................................................................................. 22
3.3.2 Mounting.................................................................................................................. 23

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4. Approvals and Certifications.............................................................................................. 24
5. Using the Digi m10 .............................................................................................................. 25
5.1 Interfacing with the Digi m10........................................................................................ 25
5.2 The Digi m10 JumpStart Kit......................................................................................... 26
6. Antenna Information............................................................................................................ 28
Appendix A: Digi m10 Mechanical Drawings............................................................................. 29
Appendix B: Development Board Mechanical Drawing............................................................. 33
Appendix C: Digi m10 Development Board Schematic............................................................. 34
Appendix D: M10 Modifications for Industry Canada Compliance............................................ 38
List of Tables
Table 1: Connector Pins on the Digi m10...................................................................................... 11
Table 2: Host Transmit and Receive Pins..................................................................................... 12
Table 3: Debug Transmit and Receive Pins.................................................................................. 12
Table 4: Power Pins ...................................................................................................................... 13
Table 5: Power Enable Pin............................................................................................................ 13
Table 6: DA Pin.............................................................................................................................. 15
Table 7: SA Pin.............................................................................................................................. 15
Table 8: RF Interface Details......................................................................................................... 16
Table 9: Operating Conditions....................................................................................................... 20
Table 10: Digital I/O Electrical Specifications................................................................................ 22
List of Figures
Figure 1: Block Diagram.................................................................................................................. 9
Figure 2: Digi m10 Pin Numbering................................................................................................ 10
Figure 3: Pin Assignment .............................................................................................................. 11
Figure 4: Timing Diagram for Powering Up................................................................................... 14
Figure 5: Timing Diagram for Powering Down .............................................................................. 14
Figure 6: Timing Diagram for Data Available ................................................................................ 15
Figure 7: Timing Diagram for Satellite Available........................................................................... 16
Figure 8: RF Connector on the Digi m10....................................................................................... 16
Figure 9: Digi m10 Dimensions ..................................................................................................... 23
Figure 10: Interface Between the Host Controller and the Digi m10............................................. 25
Figure 11: Layout of the Development Board................................................................................ 26
Figure 12: Digi m10 Mechanical Drawing...................................................................................... 29
Figure 13: Digi m10 Mechanical Drawing: Part A.......................................................................... 29
Figure 14: Digi m10 Mechanical Drawing: Part B.......................................................................... 30
Figure 15: Digi m10 Mechanical Drawing: Part C ......................................................................... 31
Figure 16: Digi m10 Mechanical Drawing: Part D ......................................................................... 32
Figure 17: Development Board Schematic.................................................................................... 34
Figure 18: Development Board Schematic (Part A)...................................................................... 35
Figure 19: Development Board Schematic (Part B)...................................................................... 35
Figure 20: Development Board Schematic (Part C)...................................................................... 35
Figure 21: Development Board Schematic (Part D)...................................................................... 36

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About This Manual
This manual defines and specifies the functions of the Digi m10 and its usage. It also contains
guidelines for using the development board which comes with the Digi m10 JumpStart Kit.
Target Audience
The target audience for this user manual comprises engineers and business managers who want
to augment their company's existing asset-tracking systems with satellite networks. A typical user
would be an engineer who is well- versed with wireless data communications.
Symbols Used in This Manual
Symbol Description
Provides additional information corresponding to the topic that is being discussed.
Warning! If ignored, may cause permanent damage to the development kit or injury
to a person.
Caution! Failure to comply with a caution may result in failure or damage to the
device.
Danger! Failure to comply with a danger symbol may result in serious injury.
Reference Documents
The following documents have been used in the preparation of this user manual:
Department of Defense Test Method Standard for Environmental Engineering
Considerations and Laboratory Tests, MIL STD 810E
European Telecommunications Standards Institute, EN 300 832 (A1 version 1.1.1),
Electromagnetic Compatibility for Mobile Earth Stations.
International Electrotechnical Commission, IEC 61000-4-4, Testing and
Measurement Techniques -- Immunity to Fast Transient / Burst Immunity Test.
International Electrotechnical Commission, IEC 61000-4-6, Testing and
Measurement Techniques -- Immunity to Conducted Disturbances, Induced by
Radio-Frequency Fields.
ORBCOMM Serial Interface Specification, E80050015.
ORBCOMM Subscriber Communicator (SC) Standards and Specifications,
E25050102.
ORBCOMM Subscriber Communicator Type Approval Plan, A25TP0017.
ORBCOMM System Overview, A80TD0008.
RoHS FAQ -- http://www.rohs.gov.uk/FAQs.aspx#10

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Society of Automotive Engineers, SAE J1455, Joint SAE / TMC Recommended
Environmental Practices for Electronic Equipment Design (Heavy-Duty Trucks).
Technical Requirements for Satellite Earth Stations and Systems (SES); Mobile Earth
Stations (MES) Providing Low Bit Rate Data Communications (LBRDC) using Low
Earth Orbiting (LEO) satellites operating below 1 GHz, EN 3200 721.

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Industry Canada Notice
This equipment has been tested and found to be in compliance with the limits for Industry Canada
requirements.
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.
Caution
To comply with the IC radio frequency exposure requirements, the following antenna installation
and device operating configurations must be satisfied:
# Product models using external antennas require professional installation. The antennas used
for professional installation must be fixed-mounted on indoor/outdoor permanent structures with a
separation distance from all persons more than 50 cm (approximately 20 inches).
# Antennas must not be co-located and must not operate in conjunction with any other antenna or
transmitter.
In the event of a problem, please contact the after sales service network.
As per Directive 2002/96/EC of the European Parliament and Council on waste
and electrical equipment (WEEE), the product should be returned to the
distributor after the end of product life.
Where to Get Help
For additional information or clarifications regarding this user manual, please get in touch with
Digi International using the contact information provided below.
Address 11001 Bren Road East
Minnetonka, MN 55343
Phone [phone]
Email http://www.digi.com/support/eservice/login.jsp

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1. Overview of the Digi m10
The Digi m10 is an ORBCOMM Subscriber Communicator, which enables modem-like access to
the ORBCOMM satellite network. It is ideal for machine-to-machine (M2M) applications (e.g.
asset tracking, utility meters, pipeline monitoring, etc.) that monitor or control remote assets. It
can be added to an existing tracking system or run as a stand-alone modem.
Figure 1: Block Diagram
2. Interfaces
This section explains the different interfaces available on the Digi m10.
2.1 Connector Pins
The host controller provides power and ground, and communicates serially with the Digi m10.
The Digi m10 is outfitted with a factory-mounted, 14pin (7 pins across 2 rows) SAMTEC 1mm
pitch, standard socket connector (MLE-107-01-G-DV-K). The details of the pin designations are
provided below.

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Figure 2: Digi m10 Pin Numbering
The connector provides the necessary interface signals to communicate over a 3.3V TTL level
serial link and to power Digi m10. Basic communication can be established using the Tx & Rx
lines and the remaining signals provide additional handshaking (RTS/CTS), status (SA/DA) and
debug information (Dbg_Tx/Dbg_Rx) as described in the following sections.
Refer to Table 1 for details. The Digi m10 can be connected to the host PCB using a 14-pin
SAMTEC 1mm pitch, stacker header connector (MW-07-03-G-D-147-065-P).

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Figure 3: Pin Assignment
Table 1: Connector Pins on the Digi m10
Pin Name Description Digital I/O
Direction
Comments
1 VCC Supply
2 GND Ground
3 VCC Supply
4 GND Ground
5 PWR_EN Digi m10 Power Enable Input Pulled low
using 47KΩ
6 GND Ground
7 RX 3.3 V UART Interface. Host controller to the Digi
m10 Input
8 TX 3.3V UART Interface. Digi m10 to host controller. Output
9 SA Satellite Available Output
10 DA Data Available Output
11 Dbg_Tx 3.3V UART Interface Digi M10 to Debug Port Output
12 Dbg_Rx 3.3V UART Interface Debug Port to Digi m10 Input
13 RTS 3.3V UART Interface. Host controller to Digi m10 Input
14 CTS 3.3V UART Interface. Digi m10 to Host controller Output

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2.2 Serial Interface
2.2.1 Host Port
The host port is the main serial interface and provides device management and monitoring using
3.3 V levels. The serial data is carried on the Transmit (TX) and Receive (RX) lines. The details of
the Transmit and Receive pins are shown in Table 2. An RS232 level shifter is required to
connect the Digi m10 to a PC. This is already available on the development board, which comes
with the Digi m10 JumpStart Kit.
Table 2: Host Transmit and Receive Pins
Pin
Name
Description
8
TX
3.3 V UART interface;
Digi m10 to the host
controller
7
RX
3.3 V UART interface;
host controller to the
Digi m10
Note: The RX line (Pin 7) needs to be pulled high using a 10KΩ resistor to 3.3V on the Host
board.
2.2.2 Host Port (With Flow Control)
Hardware flow control is implemented using RTS (Request to Send) and CTS (Clear To Send)
signals.
Assertion is set to 0V and De-Assertion is set to 3.3V. At power up RTS is configured as
input, CTS is configured as output and is set to asserted state. When flow control is enabled via
extended packet by DTE, RTS serves as input to m10 and is controlled by DTE where as CTS is
input to DTE and is controlled by m10.When M10 is ready to receive data from DTE, it asserts the
CTS line. Similarly, when DTE is ready to receive data from M10, it should assert the RTS line.
2.2.3 Debug Port
The Digi m10’s diagnostics (this is an optional interface) can be accessed through this port using
a terminal emulation program at 115200 baud rate.
Table 3: Debug Transmit and Receive Pins
Pin
Name
Description
11
Dbg_Tx
3.3 V UART debug
interface; Digi m10 to
the host controller
12
Dbg_Rx
3.3 V UART debug
interface; host controller

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to the Digi m10
Note: The Dbg_Rx line (Pin 12) needs to be pulled high using a 10KΩ resistor to 3.3V on
the Host board even if Debug port is not used.
2.3 Power and Ground
The Digi m10 is powered using five pins of its 14-pin connector (see Table 4). The five mounting
pins on the shield of the Digi m10 are also connected to the ground plane of the Digi m10.
Table 4: Power Pins
Pin
Name
Description
1
VCC
Supply
2
GND
Ground
3
VCC
Supply
4
GND
Ground
6
GND
Ground
2.4 Power Enable
The Power Enable signal is used to turn the Digi m10 ON or OFF. It is an active high logic-level
signal. The power enable signal can be from 3V min to 18V max. This will help users who do not
want separate PWR_EN functionality as they can tie PWR_EN to the Digi m10 supply voltage.
However, in this condition, the Digi m10 will be always be powered ON (consuming receive
current) unless the user cuts OFF Digi m10 power. This signal has to be maintained at an active
high level in order to keep the Digi m10 ON.
Table 5: Power Enable Pin
Pin
Name
Description
5
PWR_EN
Digi m10 Power Enable
This line is pulled low using a 47KΩresistor.
2.4.1 Powering Up
To power on the Digi m10, the host controller must provide an input voltage between 9 V and 18
V DC and then set the PWR_EN pin to active high. Typically, the Digi m10 will take five seconds
to be in a ready state. After powering on, the Digi m10 will toggle the DA pin once to let the host
controller know that it is ready to receive serial commands.
After the DA pin's initial toggle, its subsequent active high state indicates messages from the
satellite that are available in the Digi m10's inbound (IB) queue. The Digi m10's timing diagram for
powering up is shown in Figure 4.

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Figure 4: Timing Diagram for Powering Up
The delay between PWR_EN going high with respect to VCC going high is not critical. Digi
International recommends a 10 milliseconds delay.
2.4.2 Powering Down
The host controller can power down the m10 by setting the PWR_EN pin to LOW. The host
controller can leave the supply voltage for Digi m10 ON, or remove it at its discretion. If the supply
is left ON with PWR_EN set to low, the Digi m10 will be powered down. However, it will consume
a leakage current of less than 3 µA. The timing diagram of the Digi m10's power down sequence
is shown in Figure 5.
Figure 5: Timing Diagram for Powering Down
It is the responsibility of the host controller to back up all messages, reports,
GlobalGrams, etc. before powering down the Digi m10.
2.5 DA (Data Available)
The Data Available signal is an active high signal. It is normally low and is driven high when the
Digi m10 receives messages, user commands, or Global Grams from the satellite. The signal

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goes low only after the host controller has cleared the outbound (OB) queue. The Digi m10's
timing diagram for DA is shown in Figure 6.
Table 6: DA Pin
Pin
Name
Description
10 DA Data Available
Figure 6: Timing Diagram for Data Available
2.6 RTS/CTS Implementation
Hardware flow control is disabled by default. When it is enabled, hardware flow control is
implemented using RTS (Request to Send ) and (Clear To Send) signals. RTS serves as an input
to the Digi m10 and is controlled by DTE. Alternatively, CTS is an input to DTE and is controlled
by the Digi m10. The RTS line is level sensitive and assertion is 0V while de-assertion is 3.3V.
Pin
Name
Description
13 RTS 3.3V UART Interface. Host controller to Digi m10
14 CTS 3.3V UART Interface. Digi m10 to Host controller
2.7 SA (Satellite Available)
The Satellite Available is an active high signal. It is normally low and is set to high whenever the
Digi m10 is receiving on valid downlink channel and has valid downlink/uplink channel information
packets. The Digi m10's timing diagram for SA is shown in Figure 7.
Table 7: SA Pin
Pin
Name
Description
9 SA Satellite Available

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Figure 7: Timing Diagram for Satellite Available
2.8 RF Interface
The RF connector for the Digi m10 (see Figure 8) is an MMCX plug, with an impedance of 50 Ω
nominal. Refer to Table 8for details.
Figure 8: RF Connector on the Digi m10
Table 8: RF Interface Details
Parameter
Value
Transmit Power 5 W (37 + / -1 dBm)
TX Frequency 148 MHz to 150.05 MHz
RX Frequency 137 MHz to 138 MHz
VSWR < 2:1 preferred
Sensitivity ≥-119 dBm
Dynamic Range 40 dB
Antenna Gain ≥0 dBi, in at least one direction
Antenna Impedance 50 Ω nominal

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The Digi m10 is protected from VSWR failure. However, for best performance, Digi
International recommends using an antenna with good VSWR readings (see Table 8) at
both the RX and TX frequencies.

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3. Technical Specifications
This chapter describes the environmental, electrical, and mechanical specifications of the Digi
m10.
3.1 Environmental
The Digi m10 conforms to the relevant sections of the following documents:
1. ORBCOMM Subscriber Communicator (SC) Standards and Specifications
2. SAE J1455 Joint SAE / TMC Recommended Environmental Practices for Electronic
Equipment Design (Heavy-Duty Trucks)
3. FCC Part 2 and Part 25
4. CE mark (EC directive- 95 / 5 / EC) 0.
3.1.1 Electromagnetic Compatibility
3.1.1.1 Radiated Emissions
The Digi m10 conforms to Section 4.1 Radiated Emissions of the ORBCOMM Subscriber
Communicator (SC) Standards and Specifications document for emission within and outside
the 148.000 to 150.050 MHz band. Refer to EN 300 721 for details.
3.1.1.2 Conducted Emissions
The RF connector on the Digi m10 complies with the test methodology and test levels for
conducted emissions defined in EN 300 832. Refer to Section 4.3 Conducted Emissions of
the ORBCOMM Subscriber Communicator (SC) Standards and Specifications document.
Exempted from this test as per standard
3.1.1.3 Radiated Immunity
The Digi m10 complies with the test methodology and test levels for radiated immunity,
defined in EN 300 832 (i.e. 80MHz – 1000MHz at 3V/m.) Refer to Section 4.2 Radiated
Immunity of the ORBCOMM Subscriber Communicator (SC) Standards and Specifications
document.
The Digi m10 shall comply with the test methodology defined in IEC 61000-4-6 for radiated
immunity at the following test levels:
1 V for 10 - 150 KHz
10 V for 0.15 - 2 MHz
30 V for 2 - 80 MHz

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Equipment does not have a conducting cable (ex: mains supply, signal line, or ground
connection) which can couple the disturbing RF field into the equipment.
Exempted from this test as per standard.
3.1.1.4 Conducted Immunity
The RF connector on the Digi m10 complies with the test methodology and test levels for
conducted immunity defined in EN 300 832. (Refer to Section 4.4 Conducted Immunity of the
ORBCOMM Subscriber Communicator (SC) Standards and Specifications document.
Exempted from this test as per standard.
3.1.1.5 Electrostatic Discharge
The RF and application connector on the Digi m10 has protection against electrostatic
discharge (ESD) events of 8 kV contact discharge and 15 kV air discharge with the Human
Body Model. The RF connector also complies with the test methodology and test levels at the
RF pin defined in EN 300 832.
3.1.2 RoHS
The Digi m10 complies with the European Union’s directive 2002 / 95 / EC, Restriction of
Hazardous Substances in Electrical and Electronic Equipments (RoHS), and similar regulations
that may be adopted by other countries. The RoHS directive restricts lead, mercury, cadmium,
hexavalent chromium, polybrominated biphenyis (PBBs), and polybrominated biphenyl ethers
(PBDEs) in electrical and electronics equipment, except for certain maximum concentration levels
in homogeneous materials.
This specification applies to all materials, parts, components, and / or products used in the Digi
m10.
3.1.3 Operating Temperature
The Digi m10 operates from -40 °F to +185 °F (-40 °C to +85 °C). The lower temperature limit has
been verified in accordance with MIL-STD-810E, Method 502.3,Procedure II, 4-hour test
duration. The upper temperature limit has been verified in accordance with MIL-STD-810E,
Method 501.3, Procedure II, 3-diurnal-cycle test duration. Refer to Sections 3.2 High Temperature
and 3.3 Low Temperature of the ORBCOMM Subscriber Communicator Standards and
Specifications for the temperature limits and verification methodology.

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The Digi m10 has been designed and tested to operate under the conditions shown in Table 9
Table 9: Operating Conditions
Operating Temperature
Humidity Cycle
Comments
-40 °F to +185 °F (-40 °C to
+85 °C) SAE J1455 4.2.3 , Fig 4a , 8h,
3 cycles (90% RH) For 24 hours with a 12 V
supply
3.1.4 Storage Temperature
The Digi m10 can be stored for extended periods from -58 °F to +185 °F (-50 °C to +85 °C). It
has been subjected to the upper and lower temperature limits for 24 hours each and then
checked for stability.
3.1.5 Operational Shock
The Digi m10 remains structurally intact and operational after the drop test (as defined in
SAEJ1455) from 1.22 m onto each of its corners and its face.
The Digi m10 also meets the MIL-STD-810E, Method 516.4, Procedure I as defined in the
ORBCOMM Subscriber Communicator (SC) Standards and Specifications.
The Digi m10 can withstand 20 g sawtooth shock, 11 ms duration, 3 times along each of 3
orthogonal axes; as per MIL-STD-810E, Method 516.4 Procedure I.
3.1.6 Operational Vibration
The Digi m10 meets the MIL-STD-810E, Method 514.4 and ETSI 300 721 as defined in the
ORBCOMM Subscriber Communicator (SC) Standards and Specifications.
The Digi m10 has also been tested according to SAEJ1455 (as per the practices for heavy duty
trucks), which specifies that the vibration profile for CAB-mounted vibration PSD for Vertical Axis
(Figure 6, 1.04 g rms) is to be tested in three mutually perpendicular planes and that a sweep rate
of ½ octave per minute is to be used.
3.2 Electrical
This section describes the electrical specification of the Digi m10. Many of the requirements listed
below refer to the ORBCOMM Subscriber Communicator (SC) Standards and Specifications
document.