Trimble SNM940 Installation Manual

INSTALLATION GUIDE

Trimble® SNM940 Connected Site® Gateway

For a more detailed description of the installation process, please refer to the Installation Guide. Please visit

partners.trimble.com and select SNM940 Technical Support / SNM940 Connected Site Gateway Documentation.

Version 4.00

Revision A
October 2012

Corporate Office

Trimble Navigation Limited
935 Stewart Drive
PO Box 3642
Sunnyvale, CA 94085
USA

www.trimble.com

Heavy Civil Construction

Trimble Navigation Limited
10355 Westmoor Drive, Bldg. 100
Westminster, CO 80021
USA

800-538-7800 (toll free in USA)
[phone] Phone
[phone] Fax

www.trimble.com

Legal Notices

Copyright and Trademarks

© 2012, Trimble Navigation Limited. All rights reserved.
Trimble, the Globe & Triangle logo, and Connected Site are

trademarks of Trimble Navigation Limited, registered in the United
States and in other countries. VisionLink is a trademark of Trimble
Navigation Limited.

Microsoft and Windows are either registered trademarks or
trademarks of Microsoft Corporation in the United States and/or
other countries. All other trademarks are the property of their
respective owners.

Release Notice

This is the October 2012 release (Revision A) of the SNM940
Connected Site Gateway Installation Guide. It applies to version

4.00 of the SNM940 Connected Site Gateway.

Limited Warranty Terms and Conditions

See Limited Warranty Terms and Conditions, page 47.

Software Components Notices

See Software Components, page 48.

Notices

Trimble SNM940 CDMA

FCC Identifier: JUP-WCDCM300C contains FCC ID N7N-MC5728
Trimble DCM300C complies with FCC radiation exposure limits set

forth for an occupational/controlled environment. This equipment
should be operated with a minimum distance of 20cm between
the radiator and your body.

The marketed product name is SNM940. The model name is
DCM300C.

The CDMA variant of the SNM940 is certified for use with the
following Trimble antennas:

– Bulkhead GPS/Cellular - 83154, 84398
– Adhesive-mount GPS/Cellular - 82654-HH
– Bulkhead wireless LAN - 83155, 84277

Trimble SNM940 GSM

FCC Identifier: JUP-WCDCM300G contains FCC ID QIPHC25
Trimble DCM300G complies with FCC radiation exposure limits set

forth for an occupational/controlled environment. This equipment
should be operated with a minimum distance of 20 cm between
the radiator and your body.

The marketed product name is SNM940. The model name is
DCM300G.

The GSM variant of the SNM940 is certified for use with the
following Trimble antennas:

– Bulkhead GPS/Cellular - 83154, 84398
– Adhesive-mount GPS/Cellular - 82654-HH
– Bulkhead wireless LAN - 83155, 84277

For GSM850 and PCS1900 operation, in order to maintain
compliance with FCC RF exposure requirements, antennas with
gains plus cable losses not exceeding 5.0dBi (850 MHz and 4.7 dBi
(1900MHz) must be used.

Additional Regulatory Conformance

This product has successfully completed the PTCRB requirements
governing the release of new GSM 850/900/1800/1900 capable
products into the global market.

Regulatory Installation Guidance

Chassis ground is a required connection to reduce
electromagnetic interference. The preferred chassis grounding is
through the mounting bolts to the vehicle chassis. A chassis
ground strap to the vehicle’s metal frame is the next best
alternative when the immediate mounting surface is non­conductive.

Antenna Electrical Isolation – The antenna housing must not be
connected to chassis ground.

Class B Statement – Notice to Users

This equipment has been tested and found to comply with the
limits for a Class 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
communication. 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 the 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.

Changes and modifications not expressly approved by the
manufacturer or registrant of this equipment can void your
authority to operate this equipment under Federal
Communications Commission rules.

Canada

This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme

ICES-003 du Canada.

I Pour DCM300G:

Trimble DCM300G conforme à l'exposition de l'industrie
rayonnement Canada limites établies pour un travail /
environnement contrôlé. Cet équipement doit être utilisé avec
une distance minimale de 20 cm entre le radiateur et votre corps.

Trimble DCM300G est certifié pour une utilisation avec les
antennes suivantes:

– Bulkhead GPS/Cellular - 83154, 84398
– Adhesive-mount GPS/Cellular - 82654-HH
– Bulkhead wireless LAN - 83155, 84277

Pour un fonctionnement GSM850 et PCS1900, afin de maintenir la
conformité aux exigences d'exposition aux RF IC, les antennes avec
des gains et des pertes de câble dépassant pas 8.7dBi (850MHz) et

4.4dBi (1900MHz) doit être utilisé.
Types d'antennes sont approuvés:

– Bulkhead GPS/Cellular - 83154, 84398
– Adhesive-mount GPS/Cellular - 82654-HH
– Bulkhead wireless LAN - 83155, 84277

Trimble DCM300G complies with Industry Canada licence-exempt
RSS standard(s). Operation is subject to the following two
conditions: (1) this device may not cause interference, and (2) this
device must accept any interference, including interference that
may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada
applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes : (1) l'appareil ne doit
pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le fonctionnement.

Under Industry Canada regulations, this radio transmitter may
only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce
potential radio interference to other users, the antenna type and
its gain should be so chosen that the equivalent isotropically
radiated power (e.i.r.p.) is not more than that necessary for
successful communication.

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Conformément à la réglementation d'Industrie Canada, le présent

Declaration of Conformity

We, Trimble Navigation Limited,

935 Stewart Drive

PO Box 3642

Sunnyvale, CA 94088-3642

United States

[phone]

declare under sole responsibility that the product:

DCM300

complies with Part 15 of 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.

émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par
Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir
le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité
nécessaire à l'établissement d'une communication satisfaisante.

This radio transmitter 1756A-DCM300G has been approved by
Industry Canada to operate with the antenna types listed below
with the maximum permissible gain and required antenna
impedance for each antenna type indicated. Antenna types not
included in this list, having a gain greater than the maximum gain
indicated for that type, are strictly prohibited for use with this
device.

Le présent émetteur radio 1756A-DCM300G a été approuvé par
Industrie Canada pour fonctionner avec les types d'antenne
énumérés ci-dessous et ayant un gain admissible maximal et
l'impédance requise pour chaque type d'antenne. Les types
d'antenne non inclus dans cette liste, ou dont le gain est supérieur
au gain maximal indiqué, sont strictement interdits pour
l'exploitation de l'émetteur.

Industry Canada Identifier: 1756A-DCM300G

Europe

The GSM variant of this product is intended to
be used in all EU member countries. This
product has been tested and found to comply
with the requirements for a Class B device
pursuant to
thereby satisfying the requirements for CE Marking and sale
within the European Economic Area (EEA). These requirements
are designed to provide reasonable protection against harmful
interference when the equipment is operated in a residential or
commercial environment.

R&TTE Directive 1999/5/EC
Hereby, Trimble Navigation declares that the DCM300 devices are

in compliance with the essential requirements and other relevant
provisions of R&TTE Directive 1999/5/EC.

European Council Directive 89/336/EEC on EMC,

Notice to Our European Union Customers

For product recycling instructions and more information, please
go to www.trimble.com/ev.shtml.

Recycling in Europe: To recycle Trimble WEEE (Waste
Electrical and Electronic Equipment, products that run on
electrical power.), Call [phone], and ask for the
"WEEE Associate". Or, mail a request for recycling
instructions to:
Trimble Europe BV
c/o Menlo Worldwide Logistics
Meerheide 45
5521 DZ Eersel, NL

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Contents

Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installing antennas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Wiring notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Overall wiring configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Correct wiring for a negative master disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Correct wiring for a positive master disconnect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

About the SNM940 device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Related information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Exterior description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Electrical harness connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Antenna connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Mounting provisions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Use of digital and analog switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Electrical harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3 Recommended Tools and Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

General installation approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Further installation notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Step 1: Determine the mounting location of the SNM940 device . . . . . . . . . . . . . . . . . . . . . .18

Step 2: Plan the route of the electrical harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Step 3: Install the fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Step 4: Make the electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Step 5: Determine the location of the antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Step 6: Secure the SNM940 device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Step 7: Complete the device connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

5 Operation Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

LED indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Verifying that the SNM940 device is powered and operating . . . . . . . . . . . . . . . . . . . . . . . .24

Web tool setup and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Base setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Cellular phone setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Verifying GPS positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Verifying major inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Verifying engine run state sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Verifying that the SNM940 device is communicating with the VisionLink software . . . . . . . . . .30

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Enabling SNM940 device options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

6 SNM940 Wiring Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

SNM940 wiring harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Trailing wires configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Brown connector pin outs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Recommended DC electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

7 Locating the R Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Location of the R terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Delco-Remy 3T-6352, 5N-5692, and 7G-7889 alternators . . . . . . . . . . . . . . . . . . . . . . . .41

Delco-Remy 3E-7892, 3E-7578, 3E-7655, and 112-5041 alternators. . . . . . . . . . . . . . . . . . .41

Delco-Remy 155-7434 alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Bosch 7N-9720, 9G-9538, and 100-5046 alternators . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Delco-Remy 9X-6796, 107-7977, 117-1379, 121-4134, 121-4135, 125-9597, and 132-2156 alternators

43

Denso 9G-4574, 6T-7223, and 100-5045 alternators . . . . . . . . . . . . . . . . . . . . . . . . . . .43

8 Installing the SIM Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Replacing the SIM card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Limited Warranty Terms and Conditions . . . . . . . . . . . . . . . . . . . . . . . . 47

Software Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

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Safety Information

Before you use the Trimble® SNM940 Connected Site™ Gateway, ensure that you have read and
understood all safety requirements.

WARNING – This alert warns of a potential hazard which, if not avoided, could result in severe

C

injury or even death.

CAUTION – This alert warns of a potential hazard or unsafe practice that could result in minor

C

injury or property damage or irretrievable data loss.

Note – An absence of specific alerts does not mean that there are no safety risks involved.

Installing antennas

CAUTION – The antenna mount must be electrically isolated from the asset’s chassis ground.

C

CAUTION – For your own safety, and in terms of the RF Exposure requirements of the FCC,

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always observe these precautions:
– Always maintain a minimum separation distance of 20 cm (7.8 inches) between yourself and
the radiating antenna.
– Do not co-locate the antenna with any other transmitting device.

This device has been designed to operate with the antennas certified by Trimble specifically for use
with this device (see
with this device. The required antenna impedance is 50 ohms.

To reduce potential radio interference to other users, the antenna type and its gain should be so
chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that permitted for
successful communication.

CAUTION – The antennas installed for the device must be at least 20 cm away from each other.

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The antennas must also be at least 1 m away from any other transmitting antennas. WLAN and
cell antennas must be at least 20 cm away from vehicle operator location.

Notices, page 2). Antennas not included in this list are strictly prohibited for use

Wiring notices

CAUTION – Wiring around a master disconnect switch, if installed, may void the warranty of

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the machine or equipment. Refer to the machine or device user manual and warranty
information. If it is deemed necessary to wire around this switch and directly to battery a 5 A
fuse must be installed on the Battery Negative line of the harness.

CAUTION – Chassis ground is a required connection to reduce electromagnetic interference

C

issues. The preferred chassis grounding is through the mounting bolts to the vehicle chassis. A
chassis ground strap to the vehicle’s metal frame is the next best alternative when the
immediate mounting surface is non-conductive.

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Overall wiring configurations

SNM940

Preferred Chassis Grounding

Alternate Chassis Grounding

To maintain full operational capability,
the device must be connected to
constant power supply and chassis ground.

If the antenna is not
isolated, it will lead to
battery drain or unit
damage.

SNM940

Preferred Chassis Grounding

Alternate Chassis Grounding

To ve h ic l e
constant power

To maintain full operational capability,
the device must be connected to
constant power supply and chassis ground.

If the antenna is not
isolated, it will lead to
battery drain or unit
damage.

Correct wiring for a negative master disconnect

Safety Information

Correct wiring for a positive master disconnect

SNM940 CONNECTED SITE GATEWAY INSTALLATION GUIDE

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CHAPTER

1

Introduction 1

Welcome to the SNM940 Installation Guide. This document describes how to install and verify initial
operation of SNM940.

It is necessary, even for an experienced installer, to review this entire manual in order to become
familiar with the special features that differentiate the SNM940 from any other telematics device. If
you are not familiar with GPS or vehicle telematics, visit the Trimble website (www.trimble.com) for
an interactive look at Trimble and these technologies.

About the SNM940 device

The Trimble SNM940 device comes in two models. The SNM940G supports GSM cellular
communications. The SNM940C supports CDMA cellular communications only through Verizon
Wireless. Both variants offer GPS positioning, cellular communications, wireless LAN
communications, Ignition sense, Engine On sense, three digital inputs, one analog input, and wired
communications using CANbus, RS-232, and Ethernet.

The Trimble SNM940 devices are designed to operate reliably in very harsh installation environments
including all types of heavy construction equipment. These devices can be installed in-cab or out-of­cab. If the host asset has an electronic control module (ECM) installed somewhere, the SNM940 can
be installed in that same location.

Related information

Sources of related information include the following:

• Support Notes – Product support notes describe new features of the product, information not

included in the installation guide, and information on machine model-specific installation. They
are available from Trimble Support (see below) and the Trimble Heavy Civil Construction Sales
team. Support notes are updated as firmware updates are released.

• Trimble training courses – Consider a training course to help you use your GPS telematics system

to its fullest potential. For more information, go to the Trimble website at

www.trimble.com/training.html.

Technical support

If you have a problem and cannot find the information that you need in the product documentation,
contact your local dealer. Else, go to the Support area of the Trimble website
(

www.trimble.com/support.shtml). Select the product you need information on. Product updates,

documentation, and any support issues are available for download.

If you need to contact Trimble technical support, complete the online inquiry form at
(

www.trimble.com/support_form.asp).

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CHAPTER

2

Overview 2

In this chapter:

 Exterior description

 Electrical harness connector

 Antenna connectors

 Mounting provisions

 Use of digital and analog switches

 Electrical harness

This chapter introduces the Trimble SNM940
Connected Site® Gateway. These units make it
easy to receive status information from all types
of construction assets, to effectively manage
them, and to link assets to back office
applications.

The SNM940 device is ideal for the following
applications:

• Heavy earthmoving equipment, such as track

type tractors, scrapers, and motor graders

• On/Off road equipment such as dump trucks,

aggregate haulers, and service trucks

• Portable assets with engines such as

generators, compressors, and pumps

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2 – Overview

GPS antenna

Power and GPS

Cellular antenna Electrical harness WLAN antenna

WLAN indicator

FRONT

SIM card access door

BACK

connector

activity indicator

connector connector connector

Exterior description

The Trimble SNM940 device is a rugged telematics and data communications appliance. The device
enclosure is made of heavy duty aluminum. The front of the device contains the electrical harness
connector (see
mounting through-holes (see page 13).

page 14) and antenna ports (see page 11). The bottom of the device includes the four

Figure 2.1 SNM940 exterior

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2 – Overview

Electrical harness connector

The electrical harness connector is a 34-pin weatherproof electrical connector with a mechanical
locking system. For a description of the connector signals and wiring harness configuration, see

Chapter 7, SNM940 Wiring Harness.

Some machine installations may use a specialized wiring harness depending on the telematics
features available on that particular machine. Trimble recommends that you use only harnesses
provided by Trimble or by your machine’s original equipment manufacturer.

For more information, see Chapter 4, Installation.

Note – If adding additional conductors to a factory harness, the conductors must be at least 18 AWG.
Larger conductors are acceptable.

Antenna connectors

The SNM940 device has connectors for three types of external antennas:

• GPS antenna connector – This connector is a SMA jack.

• Cellular modem connector – This connector is a TNC jack.

• Wireless Local Area Network (WLAN or Wi-Fi) antenna connector – This connector is a reverse

polarity TNC jack.

The Trimble-supplied Wi-Fi antenna is a stand-alone component. The Trimble-supplied GPS and
cellular antennas are combined in a single housing.
these connectors.

For more information, see Chapter 4, Installation.

CAUTION – All antennas must be isolated from the chassis ground, or you may run down the

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machine battery or cause damage to the SNM940.

Figure 2.1 on page 10 shows the locations of

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11

2 – Overview

SMA type GPS
antenna

TNC type cellular
antenna connector

Antenna

connector

The device requires a combination of GPS/cellular antenna for all installations. There are two major
versions of this antenna; a bulkhead mount and an adhesive mount. The bulkhead mount
(P/N

84398) is the recommended antenna.

Figure 2.2 Bulkhead mount combination GPS/cellular antenna (P/N 84398)

Figure 2.3 Adhesive mount combination GPS/cellular antenna (P/N 82892-30)

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2 – Overview

If you require WLAN connectivity, use the Wi-Fi antenna. There is only one model of Wi-Fi antenna
available and it is a bulkhead mount unit.
and an antenna mounting bracket (P/N 84262-10).

A GCS base kit includes a cell/GPS antenna, Wi-Fi antenna,

Figure 2.4 Bulkhead mount Wi-Fi antenna (P/N 84262-10)

Note – Antennas and mounting bracket must be isolated from the machine chassis when installed.

Mounting provisions

The device has four through-hole mounting points, which are located at the four outside corners of
the bottom face. You must use the correct mounting hardware to install these devices. The device is
generally intended to be rigidly mounted to the asset that is being monitored. In the case of
installations where extreme vibration may be encountered, such as directly on the chassis of a
tracked machine, you should use a mechanical shock isolation system. The mounting slots allow the
use of hardware up to 6

For more information, see Chapter 4, Installation.

mm (¼") diameter.

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2 – Overview

Ground

Machine

A switch or connection that is open

A switch or connection that is open

Positive of battery

Machine

OV to battery

Machine

Use of digital and analog switches

The SNM940 has the digital and analog inputs described above. There are three types of inputs as
shown in the following figures.

Figure 2.5 Digital switches 1 and 2 – Switch to Ground

Figure 2.6 Digital switch 3 – Switch to Battery

Figure 2.7 Analog switch – To positive battery

Electrical harness

The standard electrical harness for the device is Trimble P/N 82892-20.

For details, see Chapter 7, SNM940 Wiring Harness.

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CHAPTER

3

Recommended Tools and Supplies 3

In this chapter:

 To ol s

 Supplies

Tools

• Wire cutters

• Wire strippers

• Mechanic’s socket set

• Mechanic’s open-end wrench set

• Assorted screw drivers

• Digital multimeter

Every SNM940 installation will vary due to
unique features of the asset being equipped.

The tools and supplies listed below are the
absolute minimum required to complete an
SNM940 installation. A complete mechanic’s
field tool kit is preferred.

Note – Holes will most likely need to be drilled
into the machine for installation purposes.
Ensure that the area drilled will not void
contract or warranty on machine while not
compromising the safety of the operator.

• Crimp tool for insulated barrel type connectors

• Heat source – to shrink tubing

• Drill

• Assorted metal drill bits

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3 – Recommended Tools and Supplies

Supplies

• Soldering supplies (soldering iron, rosin core silver bearing, etc.)

• Solder-less 18-22 AWG barrel type butt connectors

• Solder-less #10-5/16" 18-22 AWG ring terminals

• (4) ¼" or 6 mm fasteners – either nuts and bolts with suitable washers (stainless steel is preferred)

or self-tapping screws

• Tie w raps

• Electrical tape

• Heat shrink tubing in assorted sizes

• 18-gauge wire in multiple colors

• In-line fuse holders

• 5 A fuses

• Cable sheathing such as split loom

Optional additional supplies may include SNM940 mounting brackets, antenna mounting brackets,
and shock mounts.

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CHAPTER

4

Installation 4

In this chapter:

 General installation approach

 Step 1: Determine the mounting location of

the SNM940 device

 Step 2: Plan the route of the electrical

harness

 Step 3: Install the fuses

 Step 4: Make the electrical connections

 Step 5: Determine the location of the

antenna

 Step 6: Secure the SNM940 device

 Step 7: Complete the device connections

This chapter describes the general procedure to
install an SNM940 device and its necessary
peripheral devices. Trimble assumes you have a
basic knowledge of mechanical and electrical
technical operations.

For a list of recommended tools and supplies for
installation, see

and Supplies.

Note – Before installing any telematics device,
note its serial number for later reference.

Chapter 3, Recommended Tools

General installation approach

In general, the installation is a simple process, however, failure to follow correct installation
guidelines will result in a non-functional or dysfunctional unit. Before starting the installation
process, consider the following guidelines:

• Installation length of components and length of connection wires to main unit. Keep in mind that

it is easier to extend the length of wires from asset terminals rather than change the location of
the antennas or control box.

• Ensure that you are prepared with various installation tools as each installation can be unique to

the machine that it is installed on.

• Ensure that you keep the Quick Installation Guide readily available during the install process; this

guide is shipped with every unit.

The installation can be easily performed by doing the following tasks:

1. Determine the mounting location for the SNM940 device (see page 18).

2. Plan the route of the electrical harness (see page 19).

3. Install the fuses (see page 19).

4. Make the electrical connections (see page 19).

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4 – Installation

5. Determine the mounting location for the antenna (see page 20).

6. Secure the SNM940 device (see page 21).

7. Complete the device connections (see page 21).

Further installation notes

• The SNM940 is designed for use on construction equipment. Attaching to the vehicle chassis or

body is standard procedure and will work well. If possible, avoid attaching the device to a
subcomponent that is prone to extreme shock or vibration, such as the engine block, or
suspension components. On a tracked machine, isolation mounts (P/N 84264-20) may be required
if mounting directly to the chassis.

• Ensure that the chosen mounting location of the SNM940 is in a practical location. If installing for

a specific customer, confirm with the customer that the chosen location is acceptable. For
example, installation in the lunch box compartment may not be an acceptable location.

• Electrical Interference – The SNM940 device operates well in electrically noisy environments, but

installation best practices include avoiding close proximity to alternators, generators, electric
motors, DC to AC converters, switching power supplies, and arc welding equipment. If electrical
interference is suspected, enclose the SNM940 device wiring harness in a grounded shield wrap
or grounded conduit.

• The SNM940 can be connected to the assets CANbus to provide valuable status information made

available through Trimble Cloud software applications. The SNM940 can capture and forward
publicly available data from the CAN, but due to the variety of proprietary messaging and lack of
a clean CANbus standard for machines this advance installation is not covered directly in this
document. Please contact customer support before doing a CANbus installation, as Trimble are
working to constantly improve this functionality and ease of install.

Step 1: Determine the mounting location of the SNM940 device

The SNM940 can be installed in various locations; however the recommended location is in the cab
to allow for:

• ease of access

• increased security

• a minimal distance from the antennas and control box to the main unit.

A mounting surface on the chassis of the machine is preferred to provide a chassis connection to the
SNM940 enclosure.

The SNM940 mounting plate is designed to be fixed in an area with the dimensions of 185 mm x

mm (7.28 in x 9.05 in), to allow adequate space for attachment of the electrical harness, as well

230
as the coaxial antenna connections.

Be sure to avoid mounting the unit in an area with excessive exposure to moisture, dirt, direct heat,
sunlight and chemicals, while still allowing for accessibility, as well as good air flow.

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4 – Installation

Step 2: Plan the route of the electrical harness

Keep in mind the following factors:

• The 34-pin connector on the electrical harness must reach and attach to the SNM940 device. Do

not plug the connector into the SNM940 during this step.

• For use with GCS/AccuGrade systems ensure that the brown connector on the SNM940 harness

can easily reach the corresponding brown connector on the GCS/AccuGrade harness. If there is no
brown connector on the GCS/AccuGrade harness, refer to the SNM940 Ordering Guide (this can
be found online in the Trimble Store help files).

• Locate the chassis conductors that will be attached to the trailing wires of the electrical harness.

• Find a wiring route to reach each of the chassis conductors discussed in Step 4: Make the

electrical connections, page 19. Aim to find an area in which you will easily be able to secure the

wiring once installed.

• Measure out and cut any additional wiring that may be needed to connect the tailing end of the

harness to the machine conductors.

• Wrap as much of the harness and individual conductors as possible in an abrasion-resistant

sheath to reduce the chances of damage. This sheath may be as simple as split loom or as
complex as rigid conduit depending on available materials and the service duty expected on the
particular machine. Make sure that it is possible to mechanically secure all conductors frequently
along their routes.

Step 3: Install the fuses

Plan the location of all inline fuses. These will have to be easily accessible for future maintenance.

The Wiring Harness kit (P/N 82890-20) includes a fuse holder intended to be installed at the Battery
Negative connection. It is standard practice to install a second fuse on the Battery Positive lead at the
positive terminal of the battery, especially if that signal conductor is long and embedded in the asset.
Although not necessary, it is standard practice to install fuses at every connection.

Step 4: Make the electrical connections

The following five connections are crucial connections between the tailing end of the electrical
harness and machine terminals:

• Key Switch Input (Yellow)

• Positive Battery Terminal (Red)

• Negative Battery Terminal (Black)

• Chassis Ground (Green)

• R-Terminal Input (White)

Fuses must be placed at each connection.

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4 – Installation

Each installation may vary in the number of connections made. For more information, see Chapter 7,

SNM940 Wiring Harness.

1. Solder/splice extension wires to harness where needed, and connect wires to respective
locations.

In some machines, the SNM940 continues to stay powered on when connected behind a master
disconnect. To address this, you can use a relay on the Key Switch wire, which interrupts power
that floats across the chassis causing the SNM940 to act as though the machine was running. To
test if this is occurring on your machine, turn off the master disconnect and confirm that after a
few minutes the SNM940 enters low power mode (no LEDs will be lit).

2. After harness and tailing wires have been connected, secure the harness and wires to solid
surroundings with the zip ties.

Note – The brown, purple, orange and blue wires are digital and analog input wires that are not
crucial to the operation of the SNM940.

Step 5: Determine the location of the antenna

The antenna locations will have a significant effect on the performance quality of the SNM940
device.

• Mount antennas in an area that has a clear 360° view of the sky and is at least 20 cm from all

other transmitting antennas, the operator and any other occupant, while still allowing the
antenna cables to easily reach the SNM940.

• The antennas should not be easily sighted, to reduce the chances of tampering or disablement.

• The antennas should be firmly attached to the asset so that they will not come loose due to

shock, vibration, or thermal cycling.

• The bulkhead mount combination GPS/Cellular antenna may be mounted directly to a horizontal

surface near the top of the asset by drilling a hole of at least 19
surface. You can also use a simple “C” shaped bracket to mount the bulkhead antenna as shown

Figure 2.2 on page 12. The wireless LAN (WLAN) antenna shares these mounting requirements.

in
The WLAN antenna mount must be electrically isolated from the asset’s chassis ground.

CAUTION – The antenna mounts must be electrically isolated from the asset’s chassis ground.

C

Failure to do so, may result in battery drain and potential damage to the SNM940.

• The adhesive mount combination GPS/Cellular antenna can be mounted on the inside of a

window within an asset’s cab. This antenna usually gives adequate performance for asset
management-only installations. If more accurate positioning and large file communications are
needed, Trimble recommends that you use the bulkhead mount antenna.

mm (¾") diameter through the

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4 – Installation

Step 6: Secure the SNM940 device

• Trimble recommends that you use the provided mounting bracket for installation of the SNM940.

If the chosen mounting location is outside of the cab on a tracked vehicle, then the shock plate
must be used. If the isolation mount (P/N 84313-20) is used, a braided wire must be installed to
ground the chassis of the SNM940 to the chassis of the machine through one of the mounting
holes on the shock plate. Please note that the shock mount must be bolted to the machine. In
most cases this means that the holes must be drilled to accommodate for this.

• If the mounting bracket is not to be used, drill a rectangular array of 7 mm (¼”) holes with the

dimensions of 215.4 mm x 60 mm (8.48” x 2.36”).

• Secure the SNM940 to the mounting position using four M16 ¼” bolts, nuts, and washers.

• Firmly tighten the bolts.

Step 7: Complete the device connections

• Attach the WLAN and GPS/cellular antenna connectors to the SNM940.

• For use with GCS900 or AccuGrade systems, plug the brown connector from the SNM940 harness

to the corresponding brown connector on the GCS900 or AccuGrade harness.

• Attach the power harness to the SNM940.

• Turn the machine on and observe to see the flashing LEDs (see LED indicators, page 23).

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CHAPTER

5

Operation Verification 5

In this chapter:

 LED indicators

 Verifying that the SNM940 device is powered

and operating

 Web tool setup and operation

This chapter describes how to verify the basic
operation of a newly-installed SNM940 device.

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LED indicators

Green LED

Power and GPS

Amber LED

Wireless communications
statusstatus

LED status Green LED Amber LED

Powered and initializing On Solid Off

GPS providing a position Blink N/A

No GPS signal or poor position quality Fast Blink N/A

Cellular data connection N/A On Solid

WLAN data connection N/A Blink

WLAN and cellular connections N/A Slow Blink

Poor or no wireless connection N/A Fast Blink

Low power standby Off Off

Hardware failure On Solid On Solid

Slow blink = 3 seconds on / 3 seconds off
Blink = 1 second on / 1 second off
Fast blink = 200 milliseconds on / 200 milliseconds off

5 – Operation Verification

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5 – Operation Verification

Verifying that the SNM940 device is powered and operating

Along with LED activity, the ability to see the Home page (shown below) indicates that the device is
powered and operating. If this screen does not appear, you may need to send a high signal to the Key
Switch input to initialize the device.

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5 – Operation Verification

Web tool setup and operation

For more advanced web tool usage, refer to the DCM300/SNM940 Web Service Tool User Guide. For
typical installation follow these instructions to enable the described features.

Base setup

1. When the SNM940 is turned on, it will create a service network on its WLAN radio. Connect to
the Trimble Service (<Serial Number>) network on your computer. Enter the security key to
connect to the network. The security key is abcdeabcde

2. Click OK to connect to the SNM940 WLAN. Allow at less two minutes for the network connection
to be recognized and registered before you access the device.

3. Open an Internet browser and then enter the address 192.168.33.1. The Trimble Telematics
page appears.

For further information regarding the advanced usage of the web service tool please refer to the
DCM300/SNM940 Web Service Tool User Guide.

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5 – Operation Verification

Cellular phone setup

There are two ways to set up the cell service depending on the model of the SNM940 device
purchased.

• Verizon Units: SNM940 Telematic units (P/N 806320-10-HH) ship with an active low data rate

plan. For details on how to update to a high data rate plan, refer to the SNM940 Ordering Guide.
For units with a high data rate plan, you must still enable the connection within the SNM940 Web
Service Tool. In the SNM940 Web Service tool, select the Cell tab, then select Client IP/HDRP.
Ensure that the CDMA High Data Rate Plan check box is selected in the following screen:

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5 – Operation Verification

• GSM Units: To activate cell coverage for an SNM940G unit, a high data rate SIM card must be

purchased through your local cellular provider. SNM940 Connected Site units (P/N 87940-30) are
shipped with an inactive SIM that must be replaced with an active SIM during installation. Ensure
that the SIM card is active at the time of purchase. If the SIM comes with a corresponding pin
number, enter the pin into the Web Service Tool or CB4x0 before swapping the SIM. After the pin
is entered, the Trimble provided SIM can be replaced with the newly purchased one. For more
information on replacing the SIM, see

Chapter 8, Installing the SIM Card.

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5 – Operation Verification

Verifying GPS positioning

1. In the SNM940 Web Tool page, select the GPS tab. The following page appears:

2. Check that the GPS Antenna Status field shows “NORMAL”, which indicates that the antenna is
attached and capable of tracking satellites.

3. Check that the value in the Satellites Detected field is 1 or higher, which indicates that the GPS
system is capable of functioning. If the antenna currently has a clear sky view, there should be at
least four satellites in view.

4. Check that values are displayed in the Latitude and Longitude fields and that the Status field
shows

OK, which indicates that the GPS receiver is working correctly.

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5 – Operation Verification

Verifying major inputs

1. Select the Home tab.

2. Select the Discrete I/O menu on the left of the screen. The following page appears:

3. Note the value shown in the Key Switch field. Turn the key switch on the machine to the Off
position.

4. Click Refresh in the web browser to update the page. The Key Switch field indicates OFF when the
page refreshes.

5. Turn the key switch on the machine to the On position. Click Refresh in the browser to update the
page. The Key Switch field changes to ON when the page refreshes to indicate that the device is
correctly sensing the key switch state.

Verifying engine run state sensing

1. Remain in the Discrete I/O page and start the asset’s engine.

2. Click Refresh in the browser. The R-Terminal Input field changes to show Active when the page
refreshes.

3. Turn off the engine and refresh the web page. The R-terminal Input field changes to show

INACTIVE when the page refreshes to indicate that the device is correctly indicating the sensing

of the Engine Run state.

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5 – Operation Verification

In some machines, the SNM940 continues to stay powered on when connected behind a master
disconnect. To address this, you can use a relay on the Key Switch wire, which interrupts power
that floats across the chassis causing the SNM940 to act as though the machine was running. To
test if this is occurring on your machine, turn off the master disconnect and confirm that after a
few minutes the SNM940 enters low power mode (no LEDs will be lit).

Verifying that the SNM940 device is communicating with the VisionLink software

With the Key Switch on, select the Home tab. The screen shows Connected in large green letters to
indicate it is successfully communicating with the VisionLink™ software. Any value of 1 or higher in
the Messages Sent to Back Office and Messages Received from Back Office fields are an additional
positive indicator of two-way communications with the VisionLink software. See the example on

page 24.

Note – If you are testing the SNM940 device, the VisionLink server must be available for the
Connected indicator to appear.

Enabling SNM940 device options

Device options including the Connected Site Link functionality can be enabled in the device by
entering an option code in the Web Service tool. This section describes how to enter an option code
and verify the availability of additional device capabilities.

When a device upgrade is ordered from Trimble, a device option code is provided either directly on
the electronic store or by email. One common code enables the Connected Site Link functionality.
The following example shows how to enter a Connected Site Link option code and how the Web
Service tool display updates to reflect that the option is successfully enabled.

1. Select the Option Enable tab. The following page appears:

Note – Internet Routing Full Access must be enabled for GCS/Accugrade.

2. Copy the Trimble-supplied option code and paste it into the Enter Lock Code field and then click

Submit. The optional features will be enabled and the page shows the feature status in green.

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5 – Operation Verification

3. After viewing confirmation of the installed option, select the Home tab. Select the Reboot link on
the left side of the screen. Click

Reboot.

4. Allow the device approximately two minutes to restart to save the option settings. Select the
Home tab. When the Home tab refreshes, the restart cycle is complete and the options are
correctly installed. You can then start to use the SNM940 device.

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CHAPTER

6

Locating the R Terminal 6

In this chapter:

 Location of the R terminal This chapter describes the location of the

terminal signal on several different alternator

R
designs.

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6 – Locating the R Terminal

Location of the R terminal

The location of the R terminal differs depending on the alternator used in the machine. If you cannot
locate the alternator’s R terminal, contact a qualified service technician for that machine.

The following are some examples of different alternators used in heavy machines, and the location of
the R terminal.

On machines that do not have an R terminal signal connection or a similar connection that is only
active when the engine is running, connect the R terminal wire directly to the yellow key switch wire.
Both of these inputs can be driven by a key-switched signal source. In this case, engine hours are
accrued when the key switch is on, even if the engine is not running.

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6 – Locating the R Terminal

1 – B+ terminal
2 – terminal
3 – B- terminal

1 – Top view
2 – B- terminal
3 – B+ terminal
4 – R terminal

Delco-Remy 3T-6352, 5N-5692, and 7G-7889 alternators

Delco-Remy 3E-7892, 3E-7578, 3E-7655, and 112-5041 alternators

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Delco-Remy 155-7434 alternator

1 – B- terminal
2 – B+ terminal
3 – R terminal
4 – Indicator light terminal

1 – B+ terminal
2 – D+ terminal
3 – B- terminal
4 – R terminal

6 – Locating the R Terminal

Bosch 7N-9720, 9G-9538, and 100-5046 alternators

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6 – Locating the R Terminal

1 – Optional warning light terminal
2 – B+ terminal
3 – R terminal
4 – B- terminal

1 – B+ terminal
2 – R terminal
3 – B- terminal

Delco-Remy 9X-6796, 107-7977, 117-1379, 121-4134, 121­4135, 125-9597, and 132-2156 alternators

Denso 9G-4574, 6T-7223, and 100-5045 alternators

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6 – Locating the R Terminal

In situations in which an alternator pictured above is not applicable, R terminal can be determined
by using a voltage meter. Clip the Alternator Wires (be careful to do this far enough from the
alternator to repair the wire and make the final connection).

The alternators typically have 3 outputs. To determine the R-terminal look for a wire that shows all of
the following behavior:

• No voltage when the machine is off.

• No voltage when the machine Key switch is on, but the engine is not running.

• DC voltage equivalent to battery or pulse signal of 50 Hz or greater when the machine engine is

running. For pulse signals it may show half of battery voltage, so confirm that you have your
frequency adjusted to account for pulse signals.

This connection should be made in parallel to the output. After connecting the white R terminal wire
to the identified R terminal, run the machine for a minimum of 10 minutes to confirm in the web
service tool that the correct run time is accruing.

In some cases the alternator may be sending a pulse signal, or be outside the correct supported
frequency to register. If service hours are not reporting correctly, it is possible to connect to the
positive output of the oil pressure gauge, but this should only be done if the R

terminal is not a

workable solution.

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CHAPTER

7

SNM940 Wiring Harness 7

In this chapter:

 SNM940 wiring harness

 Trailing wires configuration

 Brown connector pin outs

 Recommended DC electrical specifications

This chapter describes the SNM940 wiring
harness and electrical connections in detail.

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7 – SNM940 Wiring Harness

Tra il ing
wires

Battery and
input fuse
holder

P1 - 34-pin connector

Harness accessories

P5 - Brown connector

P4 - Three
socket
connector

Connect to bulkhead on

the SNM940

Connect t

-1939
(CANbu)

Connect to corresponing
rown connector on
CS or AccuGrade harness

SNM940 wiring harness

The standalone telematics wiring harness kit (P/N 82892-20) includes accessories to make
installation easier. The following figure shows the kit and the available connections on the wiring
harness. If used with a base kit, the correct harness will be provided.

Tab le 7.1 lists the items in the harness accessories bag.

Table 7.1 Harness accessories

Description Quantity

Fuse holder 1

5 A fuse 2

Ring terminal with heat shrink insulator 4

Butt splice with heat shrink insulator 10

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7 – SNM940 Wiring Harness

Tab le 7.2 describes the conductors in the Wiring Harness kit.

Table 7.2 Conductors

34-pin connector Signal description Wire color Termination

1 Battery - Input Black Trailing Wire

3 Chassis Ground Green Tra i l i n g W ir e

5 Key Switch Input Yellow Trailing W ire

6 Analog Input Purple Trailing Wire

7 Digital Input 1 Brown Trai l ing W i re

9 Ethernet TX- Orange P5 – Brown Connector – Pin 6

10 Ethernet TX+ Yel lo w P5 – Brown Connector – Pin 5

12 RS-232 TX Brown P5 – Brown Connector – Pin 10

13 CAN A Low Green P4 – 3 Socket Connector – Socket B

14 CAN A High Yellow P4 – 3 Socket Connector – Socket A

19 Battery + Input Red Trailing Wire with Fuse Holder

22 Digital Input 3 Orange Tra i l in g W ire

23 R-Terminal Input White Trailing Wire

24 Digital Input 2 Blue Tra i l i n g W ir e

25 Ethernet Shield Silver N/A

26 Ethernet RX- Blue P5 – Brown Connector – Pin 8

27 Ethernet RX+ White P5 – Brown Connector – Pin 7

29 RS-232 RX Red P5 – Brown Connector – Pin 3

32 RS-232 Ground Yel lo w P5 – Brown Connector – Pin 11

Pin numbers not listed above are not connected in the wiring harness. For additional detail on the
nature of the signal connections, see

Tab le 7.3.

Note – All electrical conductors used in the installation of an SNM940 Connected Site Gateway must
be 18 AWG or larger.

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Trailing wires configuration

The following figure shows the trailing wires configuration.

7 – SNM940 Wiring Harness

Tab le 7.3 describes the conductors in the trailing wires of electrical harness:

Table 7.3 Trailing wire conductors

Conductor IDConductor

Pin Number*

A 5 Key Switch

B 19 Battery + Input Red Positive terminal on battery. Terminal with the

C 1 Battery - Input Black Negative terminal on battery. Terminal that connects

D 23 R-Terminal

Signal
description

Input

Input

Wire
color

Yellow An electrical accessory circuit that becomes active

White The relay terminal on the engine’s alternator or a

Connection

when the asset’s key switch is moved to the
“accessory” and “run” positions.

Required to initialize the SNM940 as soon as an
operator activates an asset.

Note – If this connection is not made, the device will
shut off after 10 minutes of run time.

highest voltage in multi-battery configurations.
Required to provide continuous power to the

SNM940.

to chassis ground in multi-battery configurations.
Required to provide continuous power to the

SNM940.

signal such as an oil pressure switch that provides a
signal of 85% of system voltage or greater.

This signal is used to determine runtime hours. If the
R-terminal is not accessible, see

the R Terminal.

Chapter 6, Locating

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Table 7.3 Trailing wire conductors

7 – SNM940 Wiring Harness

Conductor IDConductor

Pin Number*

E 3 Chassis Ground Green Reliable connection to asset’s conductive chassis.

F 7 Digital Input 1 Brown Optional – A sensor that provides a ground signal

G 24 Digital Input 2 Blue Optional – A sensor that provides a ground signal

H 22 Digital Input 3 Orange Optional – A sensor that provides a system voltage

I 6 Analog Input Purple Optional – A sensor with an analog output or an

Signal
description

Wire
color

Connection

Required to detect open negative master disconnect.
Required EMI connection to asset’s conductive

chassis. Failure to make this connection could cause
erratic behavior on the device.

when a monitored situation occurs. If not used
connect to ground or let float. This can be an open
circuit or short circuit to ground, i.e. when the
monitored state occurs, the signal should be ground.

For more information, see Brown connector pin outs,

page 43 or refer to the GCSFlex Installation Guide.

when a monitored situation occurs. If not used
connect to ground or let float. This can be an open
circuit or short circuit to ground, i.e. when the
monitored state occurs the signal should be ground.

signal when a monitored situation occurs. Connect to
system voltage or let float. This will cause the unit to
wake up when the asset is in low power mode.

accessory electrical circuit where voltage monitoring
is required. This sensor must be no greater than
system voltage.

For more information on conductor pin numbers, see Ta bl e 7.2.

SNM940 CONNECTED SITE GATEWAY INSTALLATION GUIDE

42

Brown connector pin outs

- E - Symbol designates reduced wire seal

The following figure shows the configuration of the brown connector.

Tab le 7.4 describes the configuration of the pinouts.

7 – SNM940 Wiring Harness

Table 7.4 Typical Brown Connector Pinouts

Pin Function GCS SNM940

82892-20

1 Switched Power. Power available only when the 3D system is on. Yes No

2 Power Ground Yes No

3 RS-232 TX Display, RX Radio (AGCS RS-232-0) Yes Ye s

4 CAN Hi (GCS CAN-0) Yes No

5 Ethernet TXD+ Yes Yes

6 Ethernet TXD- Yes Ye s

7 Ethernet RXD+ Yes Ye s

8 Ethernet RXD- Yes Yes

9 CAN Low (GCSCAN0) Yes No

10 RS-232 TX Display, RX Radio (AGCS RS-232-0) Yes Yes

11 RS-232 Ground No No

12 Typically unswitched power. Power is always available (may not be

applicable to all base kits).

Some No

Pin numbers not listed in this table are not connected in the 82892-20 electrical harness. For more
information on the nature of the signal connections, see

Recommended DC electrical specifications,

page 44.

SNM940 CONNECTED SITE GATEWAY INSTALLATION GUIDE

43

7 – SNM940 Wiring Harness

Recommended DC electrical specifications

Item Symbol Min. Typ. Max. Unit

Supply Voltage V

Supply Current, Active Mode

Supply Current, Hibernate Mode

Supply Current, Daily Average

Pulse Input Voltage High

1,2

2

2,3

4

Pulse Input Voltage Low V

Ignition High Voltage V

Ignition Low Voltage (including open circuit) V

Ignition Input Pull-down Resistance R

Digital Switch To Ground Input Voltage High V

Digital Switch To Ground Input Voltage V

Digital Switch To Battery Input Voltage High

Digital Switch To Battery Input Voltage Low

5

5,6

Analog Input Voltage V

1

Max tested at Vin = 7 V, cell on and idle, Wi-FiWi-Fi on and Carrier being transmitted, relay driver sourcing 200 mA, Filtered

Power Out sourcing 200mA, USB sourcing 500mA.

2

Typical measurements taken with external voltage of 12.0 V.

3

Measurement calculated based on average current consumption over a 24 hour period multiplied by 24 hours.

4

Typical at 14V, 2 EIA/TIA-232-F Compliant, 3 EIA/TIA-485-B Compliant.

5

This measurement applies only if the PulseIn-2 input is configured as a digital input.

6

This input can also be left floating to represent an input low signal.

BATT

I

BATT

I

BATT

I

BATT

V

RTH

RTL

IGIH

IGIL

IGN

DIH

DIL

V

SBIH

V

SBIL

ANALOG

7 24 32 Volts

190 233 1500 mA

— 5 12 mA

— 600 — mA-h

85 %V

55 %V

80 — — %V

— V

IGIH

-1

V

BATT

BATT

BATT

7 10 kΩ

2.5 V

1.0 V

85 %V

55 %V

0 100 %V

BATT

BATT

BATT

SNM940 CONNECTED SITE GATEWAY INSTALLATION GUIDE

44

CHAPTER

8

Installing the SIM Card 8

In this chapter:

 Replacing the SIM card The GSM version of the SNM940 device comes

with a Trimble-supplied SIM card. In some
circumstances, such as needing a high data rate
plan for a grade control system, you may need
to replace this standard SIM card with another.
This chapter details how to successfully replace
the SIM card. Before changing the SIM card,
contact your local Trimble SNM940 dealer to
determine if a different SIM is necessary.

Replacing the SIM card

The SIM card door is located at the back of the enclosure, away from the 34-pin connector. Ensure
that the SIM pin number is entered into web interface or CB4x0 before you replace the SIM.

1. When you replace the SIM card, ensure you are working in a dry and clean environment.

2. Do not start the SNM940 device during this procedure.

3. To reduce the chances of electrostatic discharge (ESD) damage, discharge the SNM940 enclosure
to chassis ground before starting work.

4. Remove the two screws from the SIM door and open the SIM door.

5. The SIM card is held in a removable carrier tray. To release the carrier tray, use a stylus or
ballpoint pen to press the yellow ejection button. Press the ejection button gently until the
carrier tray has moved outward approximately 5

SNM940 CONNECTED SITE GATEWAY INSTALLATION GUIDE

mm.

45

8 – Installing the SIM Card

Do not press hard on the SIM ejection button, as it could damage the carrier tray locking
mechanism. If the button does not move easily, grab the carrier tray with needle nose pliers and
pull while gently pressing the ejection button.

SNM940 CONNECTED SITE GATEWAY INSTALLATION GUIDE

46

Limited Warranty Terms and Conditions

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NOTICE REGARDING PRODUCTS EQUIPPED WITH TECHNOLOGY
CAPABLE OF TRACKING SATELLITE SIGNALS FROM SATELLITE BASED
AUGMENTATION SYSTEMS (SBAS) (WAAS/EGNOS, AND MSAS),
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IALA BEACON SOURCES: TRIMBLE IS NOT RESPONSIBLE FOR THE
OPERATION OR FAILURE OF OPERATION OF ANY SATELLITE BASED
POSITIONING SYSTEM OR THE AVAILABILITY OF ANY SATELLITE BASED
POSITIONING SIGNALS.

THE FOREGOI NG LIMITED WARRANTY TERMS STATE TRIMBLE’S ENTIRE
LIABILITY, AND YOUR EXCLUSIVE REMEDIES, RELATING TO THE TRIMBLE
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TRIMBLE'S ENTIRE LIABILITY UNDER ANY PROVISION HEREIN SHALL BE
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PLEASE NOTE: THE ABOVE TRIMBLE LIMITED WARRANTY PROVISIONS
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WHICH PRODUCT WARRANTIES ARE THE RESPONSI BILITY OF THE LOCAL
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please contact your local Trimble authorized dealer or visit the
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you may select the newsletter, upgrade, or new product
information you desire.

SNM940 CONNECTED SITE GATEWAY INSTALLATION GUIDE

47

Software Components

This Trimble software contains Qt 4.5 libraries licensed under the
GNU Lesser General Public License (LGPL).

GNU LESSER GENERAL PUBLIC LICENSE

Version 2.1, February 1999
Copyright c 1991, 1999 Free Software Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301

USA

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SNM940 CONNECTED SITE GATEWAY INSTALLATION GUIDE

49