GE MDS DS-SD9-1 Users Manual
MDS SD Series
Secure, Long Range IP/Ethernet & Serial
Technical Manual
Covering ES/SS Units with Firmware Version 4.3.x
Applies to all models EXCEPT
operation, refer to Publication 05-4670A01.
MDS 05-4846A01, Rev. G
those operated in x710 Mode. For x710 mode
July 2012
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Quick-Start instructions for this product are contained in publication 05-4847A01.
All GE MDS manuals and updates are available online at www.gemds.com.
TABLE OF CONTENTS
1.0 INTRODUCTION ............................................................................................................ 1
1.1 Conventions Used in This Manual ..........................................................................................1
2.0 PRODUCT DESCRIPTION............................................................................................. 3
2.1 Front Panel Connectors and Indicators .................................................................................. 3
2.2 Key Product Features ............................................................................................................. 4
Media Access Control (MAC).................................................................................................... 4
VLAN Capability........................................................................................................................ 5
Terminal Server Capability........................................................................................................ 5
Store and Forward Capability....................................................................................................5
2.3 SD Model Offerings ................................................................................................................ 6
2.4 Operating Modes and Applicable Manuals ............................................................................. 6
2.5 Accessories and Spares ......................................................................................................... 7
Protected Network Station........................................................................................................ 7
Dual Protected Configurations.................................................................................................. 8
3.0 TYPICAL APPLICATIONS............................................................................................ 10
3.1 Operating Parameters .......................................................................................................... 10
3.2 Example Systems ..................................................................................................................11
Multiple Address Systems (MAS) ............................................................................................11
Point-to-Point System..............................................................................................................11
IP/Ethernet Polling and Terminal Server Operation................................................................ 12
Port Sharing with Multiple Hosts............................................................................................. 13
Push Communication (Report-by Exception).......................................................................... 14
IP Polling of Serial Remotes................................................................................................... 14
Serial Remotes with Two Serial Ports..................................................................................... 15
4.0 INSTALLATION PLANNING ......................................................................................... 17
4.1 Mounting Options ................................................................................................................. 18
Optional DIN Rail Mounting .................................................................................................... 18
4.2 Antennas and Feedlines ....................................................................................................... 19
Antennas................................................................................................................................. 19
Feedlines ................................................................................................................................ 19
4.3 DC Power Connection .......................................................................................................... 20
4.4 Grounding Considerations .................................................................................................... 21
4.5 Ethernet Data Interface (RJ-45) ........................................................................................... 21
4.6 Serial Data Interfaces ........................ ... ... ... .... ... ... ... .... ... ... ... ................................................ 22
COM1 (Serial) Connection...................................................................................................... 22
COM2 (Data) Connections...................................................................................................... 24
5.0 STEP-BY-STEP INSTALLATION.................................................................................. 26
MDS 05-4846A01, Rev. G SD Series Technical Manual i
5.1 Initial Configuration ............................................................................................................... 27
Web-Based Management....................................................................................................... 27
Alternative Management Methods....................... ................................................................... 27
Web Browser Connection ....................................................................................................... 28
5.2 Initial Startup & Checkout ............................................ ... ... ... .... ... ... ... ... .... ............................ 30
Ethernet Connector LEDs....................................................... .... ... ... ... ... .... ... ... ... .... ............... 31
5.3 Optimizing the Radio Network .............................................................................................. 31
Modem Type Setting............................................................................................................... 31
Inter-Packet Gap Settings.......................................................................................................32
Baud Rate Setting................................................................................................................... 32
Ethernet Settings ....................................... ... .... ...................................... .... ... ... ... .... ... ... ......... 32
Antenna SWR Check.............................................................................................................. 33
6.0 USING THE DEVICE MANAGER................................................................................. 34
6.1 Navigating the Screens ........................................................................................................ 34
Overview Screen..................................................................................................................... 35
6.2 Management Tasks .............................................................................................................. 36
6.3 Configuration Screens .......................................................................................................... 41
Radio....................................................................................................................................... 41
Store and Forward Operation.................................................................................................. 45
Features.................................................................................................................................. 50
Understanding the Use of Virtual Radio Channels (VRCs)..................................................... 55
Using the Terminal Server—Typical Example......................................................................... 58
Communications Ports............................................................................................................62
Security................................................................................................................................... 65
6.4 Maintenance & Status Screen ..............................................................................................68
Event Log................................................................................................................................ 68
Alarm Summary......................... ... ....................................... ... .... ... ... ... ... .... ... ......................... 69
Performance ........................................................................................................................... 71
Radio Test............................................................................................................................... 73
Firmware Utilities .................................................................................................................... 76
Configuration Files......................................................... ... ... ... .... ... ......................................... 80
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 ........................................................................................................... 86
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 ............................................................................ 91
OTA Reprogramming Overview.............................................................................................. 92
Cancelling OTA Reprogramming............................................................................................ 93
Error Conditions/Recovery...................................................................................................... 93
ii SD Series Technical Manual MDS 05-4846A01, Rev. G
Execution and Screen Examples............................................................................................ 93
RF Exposure
l'exposition aux RF
8.3 COM1 Operating Modes ...................................................................................................... 94
Changing COM1 Modes ......................................................................................................... 94
8.4 Implementing Sleep Mode .................................................................................................... 95
8.5 User-Programmable I/O Functions ....................................................................................... 96
8.6 Technical Specifications ...................................................................................................... 96
8.7 dBm-Watts-Volts Conversion Chart ...................................................................................... 99
9.0 GLOSSARY OF TERMS & ABBREVIATIONS ........................................................... 100
Copyright and Trademark
This manual and all software described herein is protected by Copyright: 2012 GE MDS, LLC. All
rights reserved. GE MDS, LLC reserves its right to correct any errors and omissions in this publi-
®
cation. 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 (English 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 et bulletins.
Antenna Gain vs. Minimum RF Safety Distance
Antenna Gain
0–5 dBi 5–10 dBi 10–16.5 dBi
Safety Distance (SD4) 0.79 meter 1.41 meters 3.05 meters
Safety Distance (SD9) 0.46 meter .82 meters 1.74 meters
For SD1, maintain an RF safety distance of
Safety Distance (SD1)
Safety Distance (SD2)
Safety Distance
(Other SD models):
1.80 meters for a 7 dBd (9.15 dBi) antenna.
Use of higher gain antennas means
increasing the distance accordingly.
For SD2, maintain an RF safety distance of
1.50 meters for a 7 dBd (9.15 dBi) antenna.
Use of higher gain antennas means
increasing the distance accordingly.
Consult factory prior to operation.
MDS 05-4846A01, Rev. G SD Series Technical Manual iii
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.
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 Information
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.
iv SD Series Technical Manual MDS 05-4846A01, Rev. G
Product Test Data Sheets
EXPLOSION
HAZARD!
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 (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 feedline, 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
(NFP A 70) for further information on hazardous locations and approved Division 2 wiring
methods.
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:
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 pro-
vided 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.
MDS 05-4846A01, Rev. G SD Series Technical Manual v
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.
vi SD Series Technical Manual MDS 05-4846A01, Rev. G
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 may 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.
Invisible place holder
Software & Device Manager Notations
Model Number Notations
Figure 1. MDS SD Series Transceiver
1.1 Conventions Used in This Manual
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 distinctive bolded font is used throughout the
manual that appears as follows:
Bolded font example (for screen names and keyboard entr ies)
To show the navigation path leading to a particular screen, this same
font is used with forward-pointing arrows between screen names. For
example, suppose you wish to access the radio’s
The navigation string shown for it would appear as follows:
Configuration>>Packet Settings
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 (928-960 MHz) are used only when necessary to reference
model-specific features.
Packet Settings Screen.
MDS 05-4846A01, Rev. G SD Series Technical Manual 1
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.
2 SD Series Technical Manual MDS 05-4846A01, Rev. G
2.0 PRODUCT DESCRIPTION
ANTENNA
CONNECTOR (TNC)
SERIAL DATA
CONNECTORS (DB-9)
DC INPUT
POWER
LED INDICATOR
PANEL
ETHERNET
CONNECTOR (RJ-45)
COM1 used for radio management
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 31.
Invisible place holder
Figure 2. Front Panel Connectors & Indicators
MDS 05-4846A01, Rev. G SD Series Technical Manual 3
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
• Terminal Server capability to enable IP addressing of serial
interface ports on individual radios
• Store and Forward capability
• Supports a wide variety of modem speeds and bandwidths for regulatory compliance in virtually all regions of the world
• Ethernet & serial interfaces—ideal for migration to IP networks
• Dual serial functionality (RS-232 and RS-485)
• 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 a Master 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
4 SD Series Technical Manual MDS 05-4846A01, Rev. G
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.
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, according to 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. See “Terminal Server COM1/2 Configuration” on
Page 56 for more information.
Store and Forward Capability
Store and forward (SAF) capability is available in Packet w/MAC mode.
It allows a radio to store up 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 so that only store and forward traffic is sent through the
SAF unit, conserving critical bandwidth in your network.
MDS 05-4846A01, Rev. G SD Series Technical Manual 5
2.3 SD Model Offerings
The radio is offered in three model types, using one hardware platform:
• Ethernet—All SD features and functionality
• Standard—All SD features, except over-the-air Ethernet data
• x710—Direct, drop-in compatibility for networks using a mix of
SD and older MDS x710 radios
Model Number Codes
Standard Modes (Modes covered by this manual)
The unit’s complete 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:
• Packet Mode—Payload data from the radio’s serial and Ethernet
ports is assembled into 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, and store and forward operation.
This mode requires an all-SD radio network.
• Transparent Mode—This mode is over-the-air compatible with
MDS x710 transceivers, 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.
x710 Mode: Different Manual Required
• x710 Mode—This mode provides direct, drop-in compatibility
with MDS x710 (4710 or 9710) transceivers, and uses the same
core command set as these radios. It is designed for use in systems
containing a mix of newer SD radios and legacy MDS x710 units.
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
6 SD Series Technical Manual MDS 05-4846A01, Rev. G
Invisible place holder
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 Table 1).
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
Accessory Description Part Number
Retrofit Kit, Digital Contains adapters and connectors
Retrofit Kit, Analog Contains adapters and connectors
DC Power Plug,
2-pin, polarized
Setup Guide
(for Packet and
Transparent Modes)
Flat Mounting
Bracket Kit
DIN Rail Mounting
Bracket Kit
needed to facilitate the replacement
of an existing MDS x710A/C/M
digital transceiver.
needed to facilitate the replacement
of an existing MDS x710A/C/M
analog transceiver.
Mates with power connector on radio
case. Screw terminals provided for
wires, threaded locking screws to
prevent accidental disconnect.
Describes the installation and setup
of the transceiver. A companion to
this Technical Manual.
Brackets that attach to the bottom of
the unit. Used for mounting to a flat
mounting surface. Fits the mounting
footprint of MDS x710 transceivers.
Contains bracket for mounting the
transceiver to standard 35 mm DIN
rails commonly used in equipment
cabinets and panels.
03-4696A01
03-4697A01
73-1194A53
05-4847A01
03-4123A14
03-4125A04
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.).
MDS 05-4846A01, Rev. G SD Series Technical Manual 7
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.
Invisible place holder
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.
SDxDT Configuration
Dual Protected Configurations
Two dual transceiver configurations are offered for the SD Series. They
are known as the SDxDT and the SDxDP. These configurations are used
for the following purposes:
• When full duplex operation is desired using dedicated Transmit
and Receive transceivers.
• When a Master or Repeater site requires bandpass duplexers due
to the presence of co-located antennas.
• When streaming Repeater operation is desired using dedicated
Transmit and Receive transceivers
The SDxDT uses the same chassis as the SDxP described above. However, one radio is configured with the transmit frequency and the other
for the receive frequency, with appropriate connections between them.
It also includes a bandpass duplexer tuned to a specific frequency for
simultaneous transmission and reception (full duplex) operation. Note
that the SDxDT provides one serial port and one Ethernet port for user
equipment.
8 SD Series Technical Manual MDS 05-4846A01, Rev. G
SDxDP Configuration
The SDxDP is a protected, full duplex Master or Repeater site configuration. This consists of two SDxP chassis described earlier, with appropriate interconnect cabling between the units. The radios in one SDxP
are configured with the transmit frequency and the radios in the other are
configured with the receive frequency. The SDxDP also includes a
bandpass duplexer tuned to a specific frequency for simultaneous transmission and reception (full duplex) operation.
MDS 05-4846A01, Rev. G SD Series Technical Manual 9
3.0 TYPICAL APPLICATIONS
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-by-exception 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
Polled Bridged Ethernet MODBUS TCP Packet w/MAC May also use Packet mode and enable LBT
Bridged Ethernet IP(ICMP/TCP/UDP/
Mixed Serial and Bridged
Ethernet
Report by Exception Serial and/or IP Packet w/MAC
Single Poll Multiple
Response
Two or more concurrent
serial polling applications
(COM2, COM1, and /or
IP Payload at master
Single Port Serial Polling
with encryption (COM2 or
COM1)
Single Port Serial Polling
without encryption
(COM2, COM1, or IP
Payload at master)
Protocol
(Example)
MODBUS TCP)
MODBUS RTU & IP Packet w/MAC May also use Packet mode with Multihost
Serial and/or IP Packet w/MAC
DNP3 and Modbus
RTU
Modbus RTU Packet AES On
Modbus RTU Transparent AES Off
Recommended
Radio Mode
Packet w/MAC May also use Packet mode and enable LBT
Packet w/MAC May also use Packet mode with Multihost
Notes
with Listen on RX.
with Listen on RX.
feature enabled.
feature enabled.
10 SD Series Technical Manual MDS 05-4846A01, Rev. G
3.2 Example Systems
RTU
MASTER STATION
REMOTE RADIO
REMOTE RADIO
RTU
HOST SYSTEM
OR: SDA-Augmented
Master Station
RTU
REMOTE RADIO
RTU
REMOTE RADIO
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 10.
Multiple Address Systems (MAS)
This is a common application for the transceiver. It consists of a central
master unit and several associated remote units as shown in Figure 5. 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.
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Figure 5. Typical MAS Point-to-Multipoint Network
Point-to-Point System
Where permitted, the transceiver may also be used in a point-to-point
arrangement. A point-to-point system consists of just two radios—one
Master and one Remote (see Figure 6). It provides a simplex (or
half-duplex) communications link for the transfer of data between two
locations.
MDS 05-4846A01, Rev. G SD Series Technical Manual 11
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HOST
COMPUTER
REMOTE RADIO
MASTER RADIO
RTU
MASTER UNIT
To Ethernet Port
REMOTE RADIO
(One of several possible sites)
Ethernet
Serial RTU
(Terminal Server Connection)
REMOTE RADIO
(One of several possible sites)
Ethernet RTU
Ethernet
Serial
Figure 6. Typical Point-to-Point Link
IP/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 7 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.
Figure 7. IP/Ethernet Polling Example
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12 SD Series Technical Manual MDS 05-4846A01, Rev. G
This type of network 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 8 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 With MAC operation provides Media Access Control. It is the recommended method of operation
for port sharing systems.
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 with MAC provides superior performance and
better network reliability, collision avoidance and better
overall throughput. See corresponding sections of this manual
for more information on Packet mode options.
MDS 05-4846A01, Rev. G SD Series Technical Manual 13
MASTER RADIO
HOST COMPUTER
(Host A)
To Ethernet Port
REMOTE RADIO
(One of several possible sites)
Radio Mode: Packet w/MAC
Ethernet
HOST C
HOST COMPUTER
(Host B)
Device Settings Screen
Serial
To COM2
Serial Port
Ethernet RTU Responding to
Host A
Serial RTU Responding to
Host B
Ethernet
REMOTE RADIO
(One of several possible sites)
Serial RTU Responding to
Host B
Co-located RTUs
Responding to
Different Hosts
Figure 8. Multihost 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
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 9 shows
a typical arrangement with an Ethernet host at the Master Unit that is
polling serial-based RTUs at Remote sites.
14 SD Series Technical Manual MDS 05-4846A01, Rev. G
In this example, the Host Computer is connected directly to the radio’s
MASTER RADIO
(TCP Client)
HOST COMPUTER
(TCP Server)
REMOTE RADIO
(One of several possible sites)
MODBUS® SERIAL RTU
To COM2
Serial Port
To Ethernet Port
REMOTE RADIO
(One of several possible sites)
To COM2
Serial Port
Ethernet Data Port Menu
MODBUS RTU
Protocol
MODBUS® SERIAL RTU
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 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.)
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MDS 05-4846A01, Rev. G SD Series Technical Manual 15
Figure 9. IP Polling of Serial Remotes
Serial Remotes with Two Serial Ports
In some cases, it is necessary to poll more than one RTU at a Remote
site. Figure 10 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.
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 menu system. This arrangement allows two telemetry networks to share a single radio system.
Packet w/MAC is the recommended method of operation when both
MASTER RADIO
HOST COMPUTER
(Host A)
To Ethernet Port
REMOTE RADIO
(One of several possible sites)
TCP Ethernet
REMOTE RADIO
(One of several possible sites)
SERIAL RTU
SERIAL RTU
SERIAL RTU
SERIAL RTU
Radio Mode: Packet w/MAC
Device Settings Screen
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 (depending on
whether encryption is required or not) even if there are two RTUs connected to a Remote radio.
Figure 10. Serial Remotes with Two Serial Ports
16 SD Series Technical Manual MDS 05-4846A01, Rev. G
4.0 INSTALLATION PLANNING
TRANSCEIVER
LOW-LOSS FEEDLINE
ANTENNA SYSTEM
ETHERNET
SERIAL
Master Stations typically use
omni-directional antenna
POWER SUPPLY
10–30 VDC @ 2.5A
Negative Ground Only
DATA TELEMETRY DEVICE
OR HOST COMPUTER
OR:
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 26.
Figure 11 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.
MDS 05-4846A01, Rev. G SD Series Technical Manual 17
Figure 11. Typical Station Arrangement (Remote shown)
4.1 Mounting Options
6.675˝ (16.95 cm)
2.75˝ (7 cm)
The transceiver is normally provided with flat mounting brackets
attached to the bottom of the radio as shown in Figure 12. An optional
35mm DIN rail mounting bracket is also available, and is described
below.
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Figure 12. Mounting Bracket Dimensions
NOTE: To prevent moisture from entering the radio, do not mount the case
with the cable connectors 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. 03-4125A04). 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 13.
The entire assembly then attaches to the mounting rail.
18 SD Series Technical Manual MDS 05-4846A01, Rev. G
Figure 13. Attachment & Mounting of DIN Rail Bracket
Step 1: Attach the bracket using the
Step 2: Clip the assembly onto the
DIN Rail. Removal is performed by
pulling down on the Release Tab.
Release T ab
two screws provided. (Attach to
the end opposite the unit’s connectors.)
(Unit shown is for example only, and is not an SD Transceiver.)
4.2 Antennas and Feedlines
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 14) 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.
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MDS 05-4846A01, Rev. G SD Series Technical Manual 19
Figure 14. Typical Yagi Antenna (mounted to mast)
Feedlines
The selection of an antenna feedline 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.
The three tables below show the approximate losses that will occur
when using various lengths and types of coaxial cable in the 200, 400
and 960 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)
10 Feet
Cable Type
RG-8A/U 0.26dB 1.27 dB 2.5 dB 5.07 dB
1/2 inch HELIAX
7/8 inch HELIAX
1-1/4 inch HELIAX
1-5/8 inch HELIAX
(3 Meters)
0.06 dB 0.38 dB 0.76 dB 1.6 dB
0.04 dB 0.21 dB 0.42 dB 0.83 dB
0.03 dB 0.16 dB 0.31 dB 0.62 dB
0.025 dB 0.13 dB 0.26 dB 0.52 dB
50 Feet
(15 Meters)
100 Feet
(30.5 Meters)
200 Feet
(61 Meters)
Table 4. Signal Loss in Coaxial Cables (at 400 MHz)
10 Feet
Cable Type
RG-8A/U 0.51dB 2.53 dB 5.07 dB 10.14 dB
1/2 inch HELIAX
7/8 inch HELIAX
1-1/4 inch HELIAX
1-5/8 inch HELIAX
(3 Meters)
0.12 dB 0.76 dB 1.51 dB 3.02 dB
0.08 dB 0.42 dB 0.83 dB 1.66 dB
0.06 dB 0.31 dB 0.62 dB 1.24 dB
0.05 dB 0.26 dB 0.52 dB 1.04 dB
50 Feet
(15 Meters)
100 Feet
(30.5 Meters)
200 Feet
(61 Meters)
Table 5. Length vs. Loss in Coaxial Cables (at 900 MHz)
10 Feet
Cable Type
RG-8A/U 0.85 dB 4.27 dB 8.54 dB 17.08 dB
1/2 inch HELIAX
7/8 inch HELIAX
1-1/4 inch HELIAX
1-5/8 inch HELIAX
(3.05 Meters)
0.23 dB 1.15 dB 2.29 dB 4.58 dB
0.13 dB 0.64 dB 1.28 dB 2.56 dB
0.10 dB 0.48 dB 0.95 dB 1.90 dB
0.08 dB 0.40 dB 0.80 dB 1.60 dB
50 Feet
(15.24 Meters)
100 Feet
(30.48 Meters)
200 Feet
(61 Meters)
4.3 DC Power Connection
The transceiver may be operated from any well-filtered 10.0 to 30 Vdc
power source. The supply must be capable of providing at least 2.5
Amperes continuously.
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.
20 SD Series Technical Manual MDS 05-4846A01, Rev. G
A power connector with screw terminals is provided with each unit (see
Lead
Screws (2)
Binding
Wire Ports (2)
(Polarity: Left +, Right –)
Retaining
Screws (2)
Figure 15). 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 15.
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Figure 15. DC Power Connector (P/N 73-1194A39)
NOTE: The radio is designed for use in negative ground systems only.
4.4 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.
4.5 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 16 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 ease-of-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.
MDS 05-4846A01, Rev. G SD Series Technical Manual 21
Telnet may also be used on this connector, and provides the same
8
1234
56
7
menu-based user interface available via COM1. If you wish to use Telnet
for radio control, refer to the SD Serial/Telnet Management Supplement,
Part No. 05-6193A01.
Various options are available for passing Ethernet data on this connector, allowing system administrators to optimize the configuration for
maximum narrowband efficiency, based on the operating characteristics
of their system.
Figure 16. Ethernet Port (RJ-45) Pinout
(As viewed from the outside of the unit)
Table 6. Ethernet Port (IP/Ethernet) Pinouts
Pin Functions Ref.
1 Transmit Data (TX) High
2 Transmit Data (TX) Low
3 Receive Data (RX) High
4 Unused
5 Unused
6 Receive Data (RX) Low
7 Unused
8 Unused
4.6 Serial Data Interfaces
COM1 and COM2 on the front panel serve as the serial interface ports for
radio management and payload data, respectively. The following sections identify the pin functions used on each interface. These ports are
user-configurable for specific applications. The procedures for changing
their default operation are provided later in this guide.
NOTE: Not all PCs have a serial port. If one is not available, a
USB-to-Serial adapter and appropriate driver software may be
used to provide serial connectivity. These adapters are available from several manufacturers, including GE MDS.
COM1 (Serial) Connection
The default factory settings for the radio’s
assigns it for management or diagnostics of the radio via a serial connection to a PC. COM1 may be used to set basic parameters such as output
power, modem type and operating frequency of the radio, using text
commands.
22 SD Series Technical Manual MDS 05-4846A01, Rev. G
COM1 port (Figure 17)
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