GE MDS SD Series Technical Manual
Technical Manual
MDS™ SD Series
Secure, Long Range IP/Ethernet & Serial
Covering ES/SS Units with Firmware Version 5.4.0
Applies to all modes EXCEPT those operated in x710 Mode.
For x710 mode operation, refer to Publication 05-4670A01.
MDS 05-4846A01, Rev. J
JUNE 2016
Quick-Start instructions for this product are contained in publication 05-4847A01.
Visit our website for downloadable copies of all documentation at www.gemds.com.
TABLE OF CONTENTS
1.0 INTRODUCTION ................................................................................................................................... 1
1.1 Conventions Used in This Manual ........................................................................................................ 1
1.2 New Features in this Release ............................................................................................................... 2
2.0 PRODUCT DESCRIPTION ................................................................................................................... 3
2.1 Front Panel Connectors and Indicators ................................................................................................. 3
2.2 Key Product Features ............................................................................................................................ 3
Media Access Control (MAC) ........................................................................................................... 4
VLAN Capability ............................................................................................................................... 5
Terminal Server Capability ............................................................................................................... 5
Store and Forward Capabilit y .......................................................................................................... 5
Peer-to-Peer Capability .................................................................................................................... 5
Tail End Network Capability ............................................................................................................. 5
Frequency Re-use (System ID) ....................................................................................................... 5
2.3 SD Model Offerings ............................................................................................................................... 6
2.4 Operating Modes and Applicable Manuals ........................................................................................... 6
2.5 Accessories and Spares........................................................................................................................ 7
Protected Network Station ............................................................................................................... 8
2.6 MDS™ Master Station Compatibility ..................................................................................................... 8
3.0 TYPICAL APPLICATIONS ................................................................................................................... 9
3.1 Operating Parameters ........................................................................................................................... 9
3.2 Example Systems ................................................................................................................................ 10
Multiple Address Systems (MAS) .................................................................................................. 10
Point-to-Point System .................................................................................................................... 11
IP Payload/Ethernet Polling and Terminal Server Operation ........................................................ 11
Port Sharing with Multiple Hosts .................................................................................................... 12
Push Communication (Report-by Exception) ................................................................................. 13
IP Polling of Serial Remotes .......................................................................................................... 14
IP Polling of Two Serial Ports on One Remote .............................................................................. 14
4.0 INSTALLATION PLANNING .............................................................................................................. 16
4.1 Chassis Dimensions ............................................................................................................................ 16
4.2 Mounting Bracket Options ................................................................................................................... 17
Optional DIN Rail Mounting ........................................................................................................... 17
4.3 Antennas and Feedlines...................................................................................................................... 18
Antennas ........................................................................................................................................ 18
Feedlines .......................................................................................... Error! Bookmark not defined.
4.4 DC Power Connection ......................................................................................................................... 19
4.5 Grounding Consideratio ns ................................................................................................................... 20
4.6 Ethernet Data Interface (RJ-45) .......................................................................................................... 20
4.7 Serial Data Interfaces .......................................................................................................................... 21
COM1 (Serial) Connection ............................................................................................................. 21
COM2 (Data) Connections ............................................................................................................. 22
5.0 STEP-BY-STEP INSTALLATION ....................................................................................................... 25
5.1 Initial Configuration .............................................................................................................................. 25
Web-Based Management .............................................................................................................. 26
Web Browser Connection .............................................................................................................. 26
Alternative Management Methods ................................................................................................. 29
5.2 Initial Startup & Checkout .................................................................................................................... 29
Ethernet Connector LEDs .............................................................................................................. 30
5.3 Optimizing the Radio Network ............................................................................................................. 30
Modem Type Setting ...................................................................................................................... 30
MDS 05-4846A01, Rev. J SD Series Technical Manual i
Inter-Packet Gap Settings .............................................................................................................. 30
Baud Rate Setting .......................................................................................................................... 30
Ethernet Settings ............................................................................................................................ 31
Antenna SWR Check ..................................................................................................................... 31
6.0 USING THE DEVICE MANAGER ....................................................................................................... 32
6.1 Navigating the Screens ....................................................................................................................... 32
Overview Screen ............................................................................................................................ 33
6.2 Management Tasks ............................................................................................................................. 34
6.3 Configuration Screens ......................................................................................................................... 39
Radio .............................................................................................................................................. 40
Media Access Control .................................................................................................................... 45
Store and Forward Operation ........................................................................................................ 45
Features ......................................................................................................................................... 50
Understanding the Use of Virtual Radio Channels (VRCs) ........................................................... 55
Using the Terminal Server — Typical Example ............................................................................. 57
Communications Ports ................................................................................................................... 62
Security .......................................................................................................................................... 66
6.4 Maintenance & Status Screens ........................................................................................................... 68
Event Log ....................................................................................................................................... 69
Alarm Summary ............................................................................................................................. 69
Performance ................................................................................................................................... 71
Firmware Utilities ............................................................................................................................ 77
Configuration Files ......................................................................................................................... 81
7.0 TROUBLESHOOTING ........................................................................................................................ 83
7.1 LED Indicators ..................................................................................................................................... 84
7.2 Checking for Alarms/Events ................................................................................................................ 85
Major Alarms vs. Minor Alarms ...................................................................................................... 85
Status and Informational Events .................................................................................................... 85
Event Code Definitions................................................................................................................... 85
7.3 Operating Constraints ......................................................................................................................... 87
8.0 TECHNICAL REFERENCE ................................................................................................................ 89
8.1 Performing Network-Wide Remote Diagnostics .................................................................................. 89
Setting Up Diagnostics ................................................................................................................... 90
8.2 Over-the-Air Firmware Upgrades ........................................................................................................ 90
Intrusive vs. Passive (Non-Intrusive) Mode ................................................................................... 90
Broadcast Reprogramming Suggestions by Network Type ........................................................... 92
OTA Reprogramming Overview ..................................................................................................... 92
Cancelling OTA Reprogramming ................................................................................................... 93
Error Conditions/Recovery ............................................................................................................. 93
Execution and Screen Examples ................................................................................................... 93
8.3 COM1 Operating Modes ..................................................................................................................... 94
Changing COM1 Modes................................................................................................................. 94
8.4 Implementing Sleep Mode................................................................................................................... 95
8.5 Technical Specifications ...................................................................................................................... 96
8.6 dBm-Watts-Volts Conversion Chart .................................................................................................... 98
9.0 GLOSSARY OF TERMS & ABBREVIATIONS .................................................................................. 99
ii SD Series Technical Manual MDS 05-4846A01, Rev. J
Copyright and Trademark
For SD1, maintain an RF safety distance of
For SD2, maintain an RF safety distance of
increasing the distance accordingly.
Consult factory prior to operation.
This manual and all software described herein is protected by Copyright: 2015 GE MDS, LLC.
All rights reserved. GE MDS, LLC reserves its right to correct any errors and omissions in this
publication. Modbus® is a registered trademark of Schneider Electric Corporation. All other
trademarks and product names are the property of their respective owners.
RF Safety Notice (E nglish and French)
Concentrated energy from a directional antenna may pose a health hazard to
humans. Do not allow people to come closer to the antenna than the distances
listed in the table below when the transmitter is operating. More information
on RF exposure can be found online at the following website:
www.fcc.gov/oet/info/documents/bulletins.
Concentré d'énergie à partir d'une antenne directionnelle peut poser un risque
pour la santé humaine. Ne pas permettre aux gens de se rapprocher de l'antenne que les distances indiquées dans le tableau ci-dessous lorsque l'émetteur
est en marche. Plus d'informations sur l'exposition aux RF peut être trouvé en
ligne à l'adresse suivante: www.fcc.gov/oet/info/documents/bulletins.
Antenna Gain vs. Minimum RF Safety Distance
0–5 dBi 5–10 dBi 10–16.5 dBi
Safety Distance (SD4)
Safety Distance (SD9)
Safety Distance (SD1)
Safety Distance (SD2)
Safety Distance
(other models):
0.79 meter 1.41 meters 3.05 meters
0.46 meter .82 meters 1.74 meters
1.80 meters for a 7 dBd (9.15 dBi) antenna.
Use of higher gain antennas means
increasing the distance accordingly.
1.50 meters for a 7 dBd (9.15 dBi) antenna.
Use of higher gain antennas means
Antenna Gain
FCC Part 15 Notice
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. Any unauthorized modification or changes to this device without
the express approval of the manufacturer may void the user’s authority to operate this device.
Furthermore, this device is intended to be used only when installed in accordance with the instructions outlined in this manual. Failure to comply with these instructions may void the user’s
authority to operate this device.
MDS 05-4846A01, Rev. J SD Series Technical Manual iii
Industry Canada Notice
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
Servicing Precautions
When servicing energized equipment, be sure to wear appropriate Personal Protective Equipment
(PPE). During internal service, situations could arise where objects accidentally contact or short
circuit components and the appropriate PPE would alleviate or decrease the severity of potential
injury. When servicing radios, all workplace regulations and other applicable standards for live
electrical work should be followed to ensure personal safety.
Manual Revision and Accuracy
This manual was prepared to cover a specific version of firmware code. Accordingly, some
screens and features may differ from the actual unit you are working with. While every reasonable effort has been made to ensure the accuracy of this publication, product improvements may
also result in minor differences between the manual and the product shipped to you. If you have
additional questions or need an exact specification for a product, please contact GE MDS using
the information at the back of this guide. In addition, manual updates can be found on our web
site at www.gemds.com
Environmental I nfor mati on
The manufacture of this equipment has required the extraction and use of natural resources. Improper disposal may contaminate the environment and present a health risk due to hazardous
substances contained within. To avoid dissemination of these substances into our environment,
and to limit the demand on natural resources, we encourage you to use the appropriate recycling
systems for disposal. These systems will reuse or recycle most of the materials found in this
equipment in a sound way. Please contact GE MDS or your supplier for more information on the
proper disposal of this equipment.
Battery Disposal —This product may contain a battery. Batteries must be disposed of properly,
and may not be disposed of as unsorted municipal waste in the European Union. See the product
documentation for specific battery information. Batteries are marked with a symbol, which may
include lettering to indicate cadmium (Cd), lead (Pb), or mercury (Hg). For proper recycling return the battery to your supplier or to a designated collection point. For more information see:
www.weeerohsinfo.com.
Product Test Data Sheets —Test Data Sheets showing the original factory test results for this
unit are available upon request from the GE MDS Quality Leader. Contact the factory using the
information at the back of this manual. Serial numbers must be provided for each product where
a Test Data Sheet is required.
CSA/us Notice
This product is approved for use in Class 1, Division 2, Groups A, B, C & D Hazardous Locations. Such locations are defined in Article 500 of the National Fire Protection Association
(NFPA) publication NFPA 70, otherwise known as the National Electrical Code. The transceiver
has been recognized for use in these hazardous locations by the Canadian Standards Association
iv SD Series Technical Manual MDS 05-4846A01, Rev. J
(CSA) which also issues the US mark of approval (CSA/US). The CSA Certification is in accordance with CSA STD C22.2 No. 213-M1987.
CSA Conditions of Approval: The transceiver is not acceptable as a stand-alone unit for use in
the hazardous locations described above. It must either be mounted within another piece of
equipment which is certified for hazardous locations, or installed within guidelines, or conditions
of approval, as set forth by the approving agencies. These conditions of approval are as follows:
The transceiver must be mounted within a separate enclosure which is suitable for the intended
application. The antenna feed line, DC power cable and interface cable must be routed through
conduit in accordance with the National Electrical Code. Installation, operation and maintenance
of the transceiver should be in accordance with the transceiver's installation manual, and the National Electrical Code. Tampering or replacement with non-factory components may adversely
affect the safe use of the transceiver in hazardous locations, and may void the approval. A power
connector with screw-type retaining screws as supplied by GE MDS must be used.
Do not disconnect equipment unless power has been switched off or the area is known
to be non-hazardous. Refer to Articles 500 through 502 of the National Electrical Code
(NFPA 70) for further information on hazardous locations and approved Division 2 wiring methods.
ATEX Directive Compliance Information
The SD wireless transceivers are ATEX Compliant with the “Zone 2, Cat 3"
requirements pending the proper installation requirements listed below.
Do not disconnect while circuit is Live unless area is known to be non-hazardous. Do not open when energized.
The SD product was evaluated based on the following ratings as per SIRA 15ATEX4251X and
IECEx CSA 15.0035X:
• II 3 G
• Ex nA IIA T3 Gc
• Amb -40°C to +70°C
• T3
MDS 05-4846A01, Rev. J SD Series Technical Manual v
Decoded:
• II - Equipment Group - Electrical equipment intended for use in places with an explosive
gas atmosphere other than mines susceptible to firedamp
• 3 G - Zone 2 - Normal Protection level Gas - Provides a low level of protection and is in-
tended for use in a Zone 2 hazardous area
• Ex nA - Gas & Air Mixture Zone 2 protection - Non-Sparking
• IIA - Gas Group IIA - Propane
• T3 - temperature classification
• Gc - Gas atmospheres - assured level of protection against becoming an ignition source
in normal operation
ATEX Special Conditions for Safe Use:
1. The device shall be installed in an additional enclosure that provides an ingress protection
rating not less than IP54 and meets the enclosure requirements of EN 60079-0 and
EN 60079-15. Any field wiring connections or cable entries used for this outer enclosure
shall also be suitably certified against the enclosure requirements of EN 60079-0 and EN
60079-15. The installer shall ensure that the maximum ambient temperature of the module
when installed is not exceeded.
2. The equipment shall only be used in an area of not more than pollution degree 2, as defined
in IEC 60664-1.”
3. Transient protection shall be provided that is set at a level not exceeding 140 % of the peak
rated voltage value at the supply terminals to the equipment.
Standards of Compliance
1999/5/EC RTTE Directive 1999/5/EC
2004/108/EC EMC Directive 2004/108/EC
2006/95/EC Low Voltage Directive, LVD. 2006/95/EC
2011/65/EC Restriction of the use of certain hazardous 2011/65/EC
substances in electrical and electronic equipment
EN 300 113-2 Radio Equipment and System specifications V1.5.1
EN60950-1:2006 Safety of Information technology equipment 1:2006
+A12:2011
EN 301 489-1 Electromagnetic compatibility V1.9.2
EN60079-0:2012/A11:2013 Equipment for Explosive Atmospheres
& EN 60079-15:2010
BSD License Information
The SD Series products contain source code originally released as part of “WPA Supplicant”
which is copyrighted as indicated below and is redistributed under the terms of the BSD license:
vi SD Series Technical Manual MDS 05-4846A01, Rev. J
WPA Supplicant
Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi> and contributors
All Rights Reserved.
BSD License
-------
Redistribution and use in source and binary forms, with or without modification, are permitted
provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the
distribution.
3. Neither the name(s) of the above-listed copyright holder(s) nor the names of its contributors
may be used to endorse or promote products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
MDS 05-4846A01, Rev. J SD Series Technical Manual vii
1.0 INTRODUCTION
This manual is one of two publications for users of the MDS SD Series Transceiver shown in
Figure 1. It contains an overview of common applications, installation planning data, specifications, troubleshooting, and instructions for using the web-based Device Manager. This manual is
intended for technical personnel who perform network design, configuration, and troubleshooting of the equipment.
A companion Setup Guide is also available (Part no. 05-4847A01). The scope of the Setup Guide
is limited to installing the transceiver and placing it in service for the first time. All product documentation can be downloaded free of charge from the GE MDS website at www.gemds.com. The
website also contains links to Application Bulletins and other product information.
Figure 1. MDS SD Series Transceiver
1.1 Conventions Used in This Manual
Software & Device Manager Notations
This product is designed for software control via a connected PC. To show the names of screen
items, keyboard entries, or other information displayed on a PC, a bolded font is used throughout
the manual that appears as follows:
Bolded font example (for screen names and keyboard entries)
To show the navigation path leading to a particular screen, this same font is used with forwardpointing arrows between screen names. For example, suppose you wish to access the radio’s
tures Screen
Model Number Notations
. The navigation path shown for it would appear as follows:
Configuration>>Features
The term “SD” or “SD Series” is used in this manual to denote all models in the SD product line.
Specific model numbers such as MDS SD1 (150-174 MHz), SD2 (216-235 MHz), SD4 (300-512
MHz), and SD9 (820-960 MHz) are used only when necessary to reference model-specific features.
Authorization Features
Some features of the radio are dependent on purchased options and applicable regulatory constraints. A “key” icon is shown near the heading of any such features. In some cases a feature upgrade may be available. Contact your sales representative for additional information.
Fea-
MDS 05-4864A01, Rev. I SD Series Technical Manual 1
1.2 New Features in this Release
The SD transceiver has been updated to include the following functionality in the latest release
of the product:
• Over-the-Air Compression to maximize bandwidth (See Page 44)
• Internal Modbus TCP to RTU Conversion added for IP Payloads (see Page 56)
• CTS Key Support for Packet and Packet w/MAC modes (see Page 64)
• VLAN Gateway for each IP Configuration when VLANs are enabled (see Page 66)
• 600bps baud rate added to COM ports (see page 64)
• Tail End Network Support when in Packet w/MAC Mode (AP only) (See Page 45)
• Modem Transmit Tolerance feature to enhance over-the-air data when using 38400N,
19200N and 4800F modems. (See Page 50)
• Added Buffer Delay to the COM2 port (see page 63)
• Added option for Seamless Support while in Transparent Mode (see page 65)
2 SD Series Technical Manual MDS 05-4846A01, Rev. I
2.0 PRODUCT DESCRIPTION
The transceiver is a software-configurable, industrial radio for use in licensed data acquisition
networks. It may be interfaced with a variety of data control equipment including remote terminal units (RTUs), programmable logic controllers (PLCs), flow computers, and similar devices.
Data interface connections may be made for both serial (RS-232/RS-485) and Ethernet protocols.
It is designed for use in both polled networks and report-by-exception (push) systems.
The radio employs digital signal processing (DSP) technology and a fully digital transmit and
receive IF chain to provide robust communications even under adverse conditions. DSP technology also helps eliminate the effects of component variations or temperature changes, resulting in
optimized performance.
2.1 Front Panel Connectors and Indicators
Figure 2 shows the transceiver’s front panel connectors and indicators. These items are referenced in the installation steps and in various other locations in the manual. The transceiver’s
LED functions are described in Table 10 on Page 29.
Figure 2. Front Panel Connectors & Indicators
2.2 Key Product Features
The transceiver is designed to meet the demanding needs of today’s wireless networks in a compact and rugged package. It offers an array of features in a single hardware platform:
• Software-configurable via a built-in Device Manager — no manual controls or adjustments.
• Media Access Control (MAC) to prevent data collisions when two or more radios try to use
the radio channel at the same time.
• Available encryption of payload data (AES 128-bit)
• Supports Virtual LAN (VLAN) operation
MDS 05-4864A01, Rev. I SD Series Technical Manual 3
• Terminal Server capability to enable IP addressing of serial interface ports on individual ra-
dios
• Store and Forward capability
• Frequency Re-use that offers approximately 20 dB of additional co-channel isolation when
operating networks on the same frequency.
• Supports use of MDS™ PulseNET Network Management Software
• Supports a wide variety of modem speeds and bandwidths for regulatory compliance in vir-
tually all regions of the world
• Ethernet & serial interfaces — ideal for migration to IP networks
• Dual serial functionality (RS-232 and RS-485)
• Modbus TCP to RTU Conversion in both Terminal Server and IP Payload features elimi-
nates the need for extra equipment.
• Over-the-air reprogramming of remote units — no unnecessary trips to radio sites
• Licensed 5-watt design, maximizes communications range with low interference risk from
other users
• Configurable via software as a Remote or an AP unit
• Low power “sleep mode” — ideal for battery-powered solar sites
• Virtual Radio Channels (VRC) support multiple polling applications on one radio
NOTE Some features may not be available on all units, depending on the options purchased and
regulatory constraints for the region in which the radio will operate.
Media Access Control (MAC)
An important feature of the transceiver is Media Access Control (MAC). The radio’s MAC is
specifically designed for use with narrow bandwidth, half duplex radio networks such as those
commonly used in licensed telemetry systems. When the MAC is enabled, it provides efficient
support of multiple data traffic models including multiple hosts, synchronous and asynchronous
polls, and report-by-exception (push traffic). MAC ensures that every transceiver in the network
has an equal probability of gaining access to the radio channel when it has data to send.
Coordination of Channel Access
The main objective of the MAC is to coordinate channel access for all radios in the network,
preventing data “collisions” that can occur with simultaneous transmissions from radios on the
same RF channel. With MAC operation, a single radio is configured as an Access Point (AP) and
other units are designated as Remotes. The AP serves as the controller of the RF network. Remotes request permission from the AP to use the RF channel before sending payload data, thus
avoiding collisions of data, and creating a highly reliable wireless network. The MAC is responsible for allocating which unit gets access to the broadcast medium (the RF channel), when, and
for how long.
Data Validation
Additionally, the MAC validates all messages and purges corrupted data from the system. Successful delivery of data is ensured through the use of retries and acknowledgements. Minimal
overhead is used to accomplish these tasks, which translates to increased bandwidth efficiency of
the radio channel with minimal latency, ensuring that messages are delivered in a timely manner.
4 SD Series Technical Manual MDS 05-4846A01, Rev. I
VLAN Capability
A Virtual Local Area Network (VLAN) is essentially a limited broadcast domain, meaning that
all members of a VLAN receive broadcast frames sent by members of the same network, but not
frames sent by members of a different network.
The radio supports port-based VLAN at the Ethernet interface and over the air, in accordance
with the IEEE 802.1Q standard. When VLAN Mode is enabled, the wireless ports of both AP
and Remote radios act as a “trunk port” to carry data.
Terminal Server Capability
The unit’s Terminal Server option allows serial port data to be sent over the air in the form of IP
packets. It works by encapsulating data from the serial (COM1/COM2) ports as IP packets, then
transmitting it over the air. At the receiving end, the data is decapsulated and delivered to the appropriate COM port. The Terminal Server option provides a front-end RTU conversion for TCP
MODBUS Data. See “Terminal Server COM1/2 Configuration” on Page 56 for more information.
Store and Forward Capability
Store and Forward (SAF) capability is only available in Packet w/MAC mode. It allows a radio
to store incoming data and retransmit it a short time later to other stations. This can be used to
link outlying Remote stations to the AP when direct communication is not possible due to terrain, distance, or other obstructions.
Communication routes are automatically discovered and traffic is intelligently filtered such that
only store and forward traffic is sent through the SAF unit, conserving critical bandwidth in the
network.
Peer-to-Peer Capability
Peer to Peer capability is available in Packet w/MAC mode only. It allows Remote radios in the
same radio network to pass data indirectly between each other via the AP. When the Peer-to-Peer
functionality is enabled on the Remote, both the Remote and the AP will be able to pass data in
the system. The AP will route data to and from the enabled peers without disrupting AP-toRemote specific communications.
Tail End Network Capability
This feature allows the user to send DLINK messages across networks when two radios are connected via the COM1 port (Note that a special cable wiring is required to connect the radios in
the tail-end link). This feature allows Network Monitoring to extend to the Tail end link Network
when operating in Packet w/MAC mode.
Frequency Re-use (System ID)
Frequency Re-use is possible in some applications. SysID (or System ID as it is referred to in the
Device Manager) offers approximately 20 dB of additional co-channel isolation when operating
networks on the same frequency (see Page 41 for more information). Note that proper system
design is required. SysID offers nine unique choices including the default value of NONE. Master
and Remote radios in the same network must use the same value.
MDS 05-4864A01, Rev. I SD Series Technical Manual 5
To use this feature, a network must consist of all SDx radios. This feature is applicable only on
digital modems (B modems are excluded). Note that this feature does not affect adjacent channel
performance, but only co-channel performance.
2.3 SD Model Offerings
The radio is offered in three model types, using one hardware platform:
• Ethernet (ES) — All SD features and functionality
• Standard (SS) — All SD features, except over-the-air Ethernet data
• x710 (MS) — Direct, drop-in compatibility for networks using a mix of SD and older
MDS x710 radios
Model Number Codes
The unit’s model number is printed on the bottom label. Additional unit details are available
through the Device Manager, described later in this manual.
2.4 Operating Modes and Applicable Manuals
In addition to the model offerings above, the radio may be configured to operate in any of the
following modes:
Standard Modes (Modes covered by this manual)
• Packet Mode — Payload data from the radio’s serial and Ethernet ports is assembled in-
to packets and transmitted over the air. Packet mode supports Ethernet Bridging, AES
128-bit encryption, and Virtual Radio Channels (VRC). This mode requires an all-SD radio network.
• Packet w/MAC — This mode is similar to Packet Mode above, but adds a Media Access
Control (MAC) layer to the feature set. The MAC provides robust collision avoidance,
with an AP controlling which unit can access the communication channel, and when, for
maximum efficiency of the radio channel. This mode supports push traffic, data retry,
Virtual Radio Channels (VRC), AES 128-bit encryption, Peer-to-Peer, Store and Forward
operation, and Tail End Link Monitoring. This mode requires an all-SD radio network.
• Transparent Mode — This mode is over-the-air compatible with MDS x710 transceiv-
ers, while supporting payload data encapsulated in IP at the Ethernet port. This mode is
ideal for mixed networks containing SD and older MDS x710 radios. It allows currently
deployed x710 networks to add support for Ethernet data at either the Master or Remote
radios. Note that Ethernet Bridging is not supported in this mode.
NOTE Transparent Mode also offers AES Encryption and added security for DLINK polling. A
separate DLINK Encryption passphrase is only applicable when Transparent w/ AES
Encryption is enabled. Transparent w/AES Encryption requires an all SD radio network.
x710 Mode: Different Manual Required
• x710 Mode — This mode provides direct, drop-in compatibility with MDS x710 trans-
ceivers, and uses the same core command set as these radios. It is designed for use in systems containing a mix of SD radios and legacy MDS x710 units.
6 SD Series Technical Manual MDS 05-4846A01, Rev. I
Accessory
Description
Part Number
Retrofit Kit, Digital
Contains adapters and connector s
transceiver.
Retrofit Kit, Analog
Contains adapters and connector s
analog transceiver.
DC Power Plug, 2-
Mates with power connector on radio
prevent accidental disconnect.
Setup Guide
Transparent Modes)
Describes the installation and setup
this Technical Manual.
Flat Mounting
Brackets that attach to the bottom of
footprint of MDS x710 transceivers.
DIN Rail Mounting
Contains bracket for mounting the
IMPORTANT: This manual does not cover x710 Mode operation. Refer instead to the following manuals for x710 instructions:
• Start-Up Guide (x710 Mode) — Part No. 05-4669A01
• Technical Manual (x710 Mode) — Part No. 05-4670A01
Figure 3. SD Transceivers offer compatibility with older MDS x710 Transceivers (left), and
may be used for replacement and/or interoperability in these networks.
A retrofit kit is available for connector conversion (see Accessories & Spare Items).
2.5 Accessories and Spares
Table 1 lists common accessories and spare items for the transceiver. GE MDS also offers an
Accessories Selection Guide listing additional items that may be used with the product. Visit
www.gemds.com or contact your factory representative to obtain a copy of the guide.
Table 1. Accessories & Spare Items
pin, polarized
(for Packet and
Bracket Kit
Bracket Kit
needed to facilitate the replacement
03-4696A01
of an existing MDS x710A/C/M digital
03-4697A01
needed to facilitate the replacement
of an existing MDS x710A/C/M
73-1194A53
case. Screw terminals provided for
wires, threaded locking screws to
05-4847A01
of the transceiver. A companion to
03-4123A14
the unit. Used for mounting to a flat
mounting surface. Fits the mounting
03-4125A04
transceiver to standard 35 mm DIN
rails commonly used in equipment
cabinets and panels.
MDS 05-4864A01, Rev. I SD Series Technical Manual 7
Protected Network Station
The transceiver is available in a protected network configuration, known as the SDxP (Figure 4),
where x denotes the particular model of SD transceiver installed inside the chassis (i.e., SD1, 2,
4, 9, etc.).
The SDxP is a tabletop or rack-mount unit designed to hold two transceivers, two power supplies, and a switchover logic board that automatically selects between transceiver A or B as the
active unit. Manual selection may also be made using a front panel switch.
Figure 4. Protected Network Station
With two transceivers and two power supplies installed, the unit continues to communicate even
if a failure occurs in one of the transceivers, or its associated power supply. This capability is
important in critical applications where uninterrupted service is required. Refer to publication
05-4161A01 for detailed information on this product.
2.6 MDS™ Master Station Compatibility
Figure 5. MDS™ Master Station
In order to keep up with advancing technology, the MDS™ Master Station has been created to be
a drop-in ready replacement for earlier MDS x790 Master Stations and provides backwards
compatibility with x710 radio systems. The Master Station runs on the Orbit platform to provide
highly secure and robust operations that far succeed legacy MDS products.
The Master Station is available on multiple frequencies and bands with more to be added every
day. To see which models are currently available, as well as more detailed information about the
MDS™ Master Station, visit the GEMDS website at www.gemds.com.
8 SD Series Technical Manual MDS 05-4846A01, Rev. I
Polled Bridged Ethernet
MODBUS TCP
Packet w/MAC
May also use Packet mode and enable
LBT with Listen on RX.
Bridged Ethernet
IP(ICMP/TCP/UDP/M
ODBUS TCP)
Packet w/MAC
May also use Packet mode and enable
LBT with Listen on RX.
Mixed Serial and Bridged
Ethernet
MODBUS RTU & IP
Packet w/MAC
May also use Packet mode with
Multihost feature enabled.
Report by Exception
Serial and/or IP
Packet w/MAC
Single Poll Multiple
Response
Serial and/or IP
Packet w/MAC
Two or more concurrent
Payload at master
DNP3 & Modbus RTU
Packet w/MAC
May also use Packet mode with
Single Port Serial Polling
COM1)
Modbus RTU
Packet
AES On
Single Port Serial Polling
master)
Modbus RTU
Packet
AES Off
3.0 TYPICAL AP PLIC ATIONS
This section describes common scenarios the transceiver may be used in. A number of variations
are possible; if you have unique requirements not found here, it is recommended that you consult
a support specialist at GE MDS. Contact information is provided at the back of this manual.
3.1 Operating Parameters
The transceiver can operate in both poll-response and “push” communication/report-byexception networks. In poll-response networks a central Master unit communicates with a number of Remote radios one at a time. The Master exchanges data with the currently-connected
Remote, and when finished, it establishes a new connection with the next Remote in the polling
order. In push communication/Report by Exception networks, a Remote can also transmit if it
has data to send, typically prompted by a change in status conditions from connected data
equipment.
The radio includes a number of parameters which may be set to suit the requirements of a particular application. Table 2 provides a summary of common applications, protocols, and radio
modes used. Refer to the table to determine what applications can be supported and the required
radio mode settings.
Table 2. Application Types vs. Key Radio Settings
Application
serial polling applications
(COM1 or 2, and/or IP
with encryption (COM2 or
w/o encryption (COM2,
COM1, or IP Payload at
Protocol
(Example)
Recommended
Radio Mode
Transparent
Transparent
Notes
Multihost feature enabled.
AES On
AES Off
MDS 05-4864A01, Rev. I SD Series Technical Manual 9
3.2 Example Systems
The following sections describe common system arrangements for the transceiver. Other variations are possible, and if you have questions about a specific application not covered here, you
may contact your factory representative using the information at the back of this guide. For typical radio settings in these systems, refer to Table 2 on Page 9.
Multiple Address Systems (MAS)
This is a common application for the transceiver. It consists of a central Master unit (MDS™
Master Station) and several associated Remote units as shown in Figure 6. An MAS network
provides communication between a central host computer and remote terminal units (RTUs) or
other data collection devices in the field. Often, such a system is used to carry telemetry data to
and from widely separated remote radios.
Typical MAS applications may be for automatic, remote monitoring of gas wells, water tank levels, electric power distribution systems, and similar control and measurement functions.
Figure 6. Typical MAS Point-to-Multipoint Network
10 SD Series Technica l Man u al MDS 05-4846A01, Rev. I
Point-to-Point System
Where permitted, the transceiver may also be used in a point-to-point arrangement. A point-topoint system consists of just two radios — one Master and one Remote (see Figure 7). It provides a simplex (or half-duplex) and a duplex communications link for the transfer of data between two locations.
Figure 7. Typical Point-to-Point Link
IP Payload/Ethernet Polling and Terminal Server Operation
Modern data/control networks often employ IP/Ethernet connectivity throughout the system. The
transceiver is well suited to provide connectivity between such sites using its RJ-45 modular
connector on the front panel and enabling Ethernet Bridging capabilities. Figure 8 shows an
overview of such a system.
Note that the Remote radio on the right side of the illustration uses a serial connection. The radio’s Terminal Server feature allows direct IP/addressing of serial ports on selected radios. See
“Terminal Server COM1/2 Configuration” on Page 56 for more details.
MDS 05-4864A01, Rev. I SD Series Technical Manual 11
Figure 8. IP/Ethernet Polling Example
The type of network shown in Figure 8 can also be used for general Ethernet bridging as supported by the over-the-air bandwidth of the system. Bridge filters in the radio may be set to reduce Ethernet traffic over the RF channel, and improve performance.
Port Sharing with Multiple Hosts
The transceiver allows for several external data networks to use the same RF network without
confusing the data streams. In such a system, multiple host computers at the Master Unit poll
their respective RTUs, which may be alone or co-located at the Remote sites. Figure 9 shows an
example of such a system. In this case, two host computers (Host A and Host B) are connected to
the Master Unit via the applicable data ports.
At the Remote sites, serial and Ethernet-based RTUs are employed, and responding to a specific
host computer. In the case of the Remote shown on the lower right side of the figure, two RTUs
are co-located, but responding to different host computers and handling entirely different data
streams.
The radio eliminates the need for an external adapter or special external configuration and handshaking when multiple host systems are connected to the network. The radio automatically controls access to the RF channel by multiple hosts when Packet w/MAC is activated. Virtual Radio
Channels (VRCs) are used to separate serial data streams on COM2, COM1, or IP payload ports.
Packet w/MAC operation provides Media Access Control. It is the recommended method of op-
12 SD Series Technica l Man u al MDS 05-4846A01, Rev. I
eration for port sharing systems. See “Understanding the Use of Virtual Radio Channels
(VRCs)” on Page 55.
NOTE An option exists to operate in Packet mode without MAC. However, this Packet mode
option should only be used for systems that use legacy methods of collision avoidance
including Multihost and Listen Before Transmit (LBT). The mode Packet w/MAC provides superior performance and better network reliability, collision avoidance and better
overall throughput.
Figure 9. Port Sharing with Multiple Hosts Arrangement
Using Packet w/MAC Mode
Push Communication (Report-by Exception)
Push Communication, sometimes referred to as Report-by-Exception (RBE), differs from polled
response in that a Remote radio normally transmits only when it has data to send. It does not depend on polling from a Master radio to initiate transmission. Some typical characteristics of push
communication systems are as follows:
• Remotes transmit asynchronously
• May contain large amounts of data
• Buffering and flow control are used
MDS 05-4864A01, Rev. I SD Series Technical Manual 13
DNP3 and IEC 104 are examples of protocols that implement push communication. Note that
both the serial and Ethernet versions of DNP3 support push communication.
IP Polling of Serial Remotes
The transceiver is ideal for use in systems employing a mix of serial and Ethernet protocols.
While many variations are possible, Figure 10 shows a typical arrangement with an Ethernet host
at the Master Unit that is polling serial-based RTUs at Remote sites.
In this example, the Host Computer is connected directly to the radio’s Ethernet port and the
RTUs at the Remote sites are connected to the transceiver via the radio’s COM2 serial data ports.
The IP Payload feature, used at the Master, efficiently passes TCP/UDP payload over the air, and
eliminates the need for an external terminal server. (COM1 may also be used for payload data if
properly configured via the menu system. See next example.)
Figure 10. IP Polling of Serial Remotes
IP Polling of Two Serial Ports on One Remote
In some cases, it is necessary to poll more than one RTU at a Remote site. Figure 11 shows an
example of such a system. Here, two RTUs are connected to each Remote transceiver, both using
the radio’s serial ports — COM1 and COM2.
14 SD Series Technica l Man u al MDS 05-4846A01, Rev. I
By default, the radio’s COM1 port is configured for serial management functions with a connected
PC, but it may be configured for data service using the web interface. This arrangement allows
two telemetry networks to share a single radio system.
Packet w/MAC is the recommended method of operation when both serial ports are used to pass
payload data if there are two hosts (e.g., Port Sharing with multiple host case). If there is a single
host polling all units, packet or transparent mode is the preferred option even if there are two
RTUs connected to a Remote radio.
Figure 11. IP Polling of Two Serial Ports on One Remote
MDS 05-4864A01, Rev. I SD Series Technical Manual 15
4.0 INSTALLATION PLANNI NG
This section covers pre-installation factors that should be considered when installing the transceiver in the field. Careful planning will help achieve optimal performance from the transceiver.
After reviewing this section, refer to the step-by-step installation procedures beginning on Page
25.
Figure 12 shows a typical station arrangement. The specific details at an installation site may
vary, but there are three main requirements for installing the transceiver in all cases:
• Adequate and stable primary power
• An efficient and properly installed antenna system
• Correct interface connections between the transceiver and the data device.
Figure 12. Typical Station Arrangement (Remote shown)
4.1 Chassis Dimensions
Figure 13 shows the external chassis dimensions of the SD Transceiver.
16 SD Series Technica l Man u al MDS 05-4846A01, Rev. I
Figure 13. Transceiver Dimensions
4.2 Mounting Bracket Options
The transceiver is normally provided with flat mounting brackets attached to the bottom of the
radio as shown in Figure 14. An optional 35 mm DIN rail mounting bracket is also available, and
is described below.
Figure 14. Mounting Bracket Dimensions
NOTE To prevent moisture from entering the radio, do not mount the case with the cable con-
nectors pointing up. Also, dress all cables to prevent moisture from running along the
cables and into the radio.
Optional DIN Rail Mounting
The unit may be mounted with an optional 35 mm DIN Rail Mounting Bracket Kit (Part No. 034125A04). Equipment cabinets and racks of modern design often employ this type of mounting.
Once the DIN bracket is attached to the radio, it allows for quick installation and removal of the
radio from its mounting rail without the need for tools.
The DIN Rail bracket attaches to the unit’s case as shown in Figure 15. The entire assembly then
attaches to the mounting rail.
MDS 05-4864A01, Rev. I SD Series Technical Manual 17
Figure 15. Attachment & Mounting of DIN Rail Bracket
(Unit shown is for example only, and is not an SD Transceiver.)
4.3 Antennas a nd Fe e d lines
Antennas
The transceiver may be used with a number of different antennas. The exact style and gain factor
depend on the physical size and layout of your system. Connection is made to the radio via a
TNC coaxial connector.
A directional Yagi (Figure 16) or corner reflector antenna is generally used at remote sites to
minimize interference to and from other users. Antennas of this type are available from several
manufacturers, including GE MDS. Contact your factory representative for details.
Figure 16. Typical Yagi Antenna (mounted to mast)
Feed lines
The selection of an antenna feed line is very important. Poor quality cable should be avoided as it
will result in power losses that may reduce the range and reliability of the radio system.
18 SD Series Technica l Man u al MDS 05-4846A01, Rev. I
RG-8A/U
0.26 dB
1.27 dB
2.50 dB
5.07 dB
1/2 inch HELIAX
0.06 dB
0.38 dB
0.76 dB
1.60 dB
7/8 inch HELIAX
0.04 dB
0.21 dB
0.42 dB
0.83 dB
1-1/4 inch HELIAX
0.03 dB
0.16 dB
0.31 dB
0.62 dB
1-5/8 inch HELIAX
0.025 dB
0.13 dB
0.26 dB
0.52 dB
RG-8A/U
0.51 dB
2.53 dB
5.07 dB
10.14 dB
1/2 inch HELIAX
0.12 dB
0.76 dB
1.51 dB
3.02 dB
7/8 inch HELIAX
0.08 dB
0.42 dB
0.83 dB
1.66 dB
1-1/4 inch HELIAX
0.06 dB
0.31 dB
0.62 dB
1.24 dB
1-5/8 inch HELIAX
0.05 dB
0.26 dB
0.52 dB
1.04 dB
RG-8A/U
0.85 dB
4.27 dB
8.54 dB
17.08 dB
1/2 inch HELIAX
0.23 dB
1.15 dB
2.29 dB
4.58 dB
7/8 inch HELIAX
0.13 dB
0.64 dB
1.28 dB
2.56 dB
1-1/4 inch HELIAX
0.10 dB
0.48 dB
0.95 dB
1.90 dB
1-5/8 inch HELIAX
0.08 dB
0.40 dB
0.80 dB
1.60 dB
The tables which follow show the approximate losses that will occur when using various lengths
and types of coaxial cable in the 200, 400 and 900 MHz bands, respectively. Regardless of the
type used, the cable should be kept as short as possible to minimize signal loss.
Table 3. Signal Loss in Coaxial Cables (at 200 MHz)
Cable Type
10 Feet
(3 Meters)
50 Feet
(15 Meters)
100 Feet
(30.5 Meters)
200 Feet
(61 Meters)
Table 4. Signal Loss in Coaxial Cables (at 400 MHz)
Cable Type
10 Feet
(3 Meters)
50 Feet
(15 Meters)
100 Feet
(30.5 Meters)
200 Feet
(61 Meters)
Table 5. Signal Loss in Coaxial Cables (at 900 MHz)
Cable Type
10 Feet
(3 Meters)
50 Feet
(15 Meters)
100 Feet
(30.5 Meters)
200 Feet
(61 Meters)
4.4 DC Pow er Connec t ion
The transceiver may be operated from any well-filtered 10 to 30 VDC power source. The supply
must be capable of providing at least 2.5 Amperes continuously.
MDS 05-4864A01, Rev. I SD Series Technical Manual 19
NOTE Early SD4 models supported 10.5 to 16 VDC power, not 10 to 30 VDC. Always check
the labeling above the power connector to confirm the operating range for your unit.
A power connector with screw terminals is provided with each unit (see Figure 17). Strip the
wire leads to 6 mm (1/4 inch) and insert in the wire ports, tightening securely. Be sure to observe
proper polarity as shown in Figure 17.
Figure 17. DC Power Connector (P/N 73-1194A39)
NOTE The radio is designed for use in negative ground systems only.
4.5 Grounding Considerations
To minimize the chance of damage to the transceiver and connected equipment, a safety ground
(NEC Class 2 compliant) is recommended which bonds the antenna system, transceiver, power
supply, and connected data equipment to a single-point ground, keeping all ground leads as short
as possible.
Normally, the transceiver is adequately grounded if the supplied flat mounting brackets are used
to mount the radio to a well-grounded metal surface. If the transceiver is not mounted to a
grounded surface, it is recommended that a safety ground wire be attached to one of the mounting brackets or a screw on the transceiver’s case.
The use of a lightning protector is recommended where the antenna cable enters the building;
bond the protector to the tower ground, if possible. All grounds and cabling must comply with
applicable codes and regulations.
4.6 Ethernet Data Interface (RJ-45)
The transceiver’s Ethernet Port is used to connect the unit to another Ethernet device. The port
has built-in MDIX (auto-sensing) capability, allowing either a straight-through or crossover cable to be used. Figure 18 and Table 6 show pinout data for the Ethernet port. The Ethernet interface supports both radio management and payload data transport functions.
For radio management, connecting via a web browser provides enhanced functionality and easeof-use over serial (COM1) methods or Telnet. Web-based management is the preferred and primary means of accessing the transceiver through the built-in Device Manager.
20 SD Series Technica l Man u al MDS 05-4846A01, Rev. I
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