GE MDS DS-EL705-9 Users Manual
QUICK START GUIDE
Below are the basic steps for installing the transceiver. Detailed instructions are given in “Installation
Steps” on page 6 of this guide.
1. Mount the transceiver (see
Figure 6
or
Figure 7
for mounting dimensions)
2. Install and connect the antenna system to the radio
• Use only good quality, low loss coaxial cable. Keep the feedline as short as possible.
• Preset directional antennas in the direction of desired transmission/reception.
3. Apply DC power to the radio (10–16 Vdc @ 2 A minimum)
• Measure the voltage source before connection.
• Observe proper polarity.
• Connect power to the power connector.
4. Set the radio’s basic configuration with a terminal (PC or HHT) connected to
the
INTERFACE
• Pin 23 of the INTERFACE port must be grounded to place the radio in the control and programming
mode. (See Figure 12 on page 16 for a cable wiring diagram.)
• Set the transmit frequency (
• Set the receive frequency (
• Set the network address (
• Set/verify the data rate using the
“TRANSCEIVER PROGRAMMING” on page 14 for command details.)
port
TX xxx.xxx
RX xxx.xxx
ADDR xxx
BAUD
).
).
). All radios in a given network must have the same address.
command. The default setting is
BAUD 9600 8N1
. (Refer to
5. Connect the data equipment to the radio’s INTERFACE connector
• Connection to the radio must be made with a DB-25 Male connector. Connections for typical systems are shown below.
• Connect only the required pins. Do not use a straight-through RS-232 cable with all pins wired.
• Verify the data equipment is configured as DTE. (By default, the radio is configured as DCE.)
DB-9 to DB-25 ExampleDB-25 to DB-25 Example
DB-25 DB-25
2
TXD
3
RXD
RTU
(DTE)
GND
77
2
TXD
3
RXD
GND
NOTE: Additional connections may be
(DCE)
TRANSCEIVER
needed in some installations.
See Installation for details.
RTU
DB-9 DB-25
2
RXD
3
TXD
(DTE)
GND
57
3
RXD
2
TXD
GND
(DCE)
TRANSCEIVER
6. Verify proper operation by observing the LED display
• See Table 5 on page 13 for a description of the status LEDs.
• Refine directional antenna headings for maximum receive signal strength using the
RSSI
command.
TABLE OF CONTENTS
1.0 INTRODUCTION.........................................................................1
1.1 Differences Among Models ..............................................................1
Modem Speeds ..................................................................................2
Frequency Coverage ..........................................................................2
1.2 Applications ......................................................................................2
Point-to-Multipoint, Multiple Address Systems (MAS)........................2
Point-to-Point System.........................................................................3
Switched Carrier Operation................................................................4
Single Frequency (Simplex) Operation...............................................4
1.3 Model Number Codes ......................................................................4
1.4 Accessories ......................................................................................5
2.0 INSTALLATION............................................................................6
2.1 Installation Steps ..............................................................................6
2.2 Mounting the Transceiver .................................................................8
Transceiver Board...............................................................................8
Enclosed Transceiver..........................................................................8
2.3 Antennas and Feedlines ..................................................................9
Antennas ............................................................................................9
Feedlines............................................................................................9
2.4 Power Connection ..........................................................................10
Conservation (Sleep Mode)..............................................................10
2.5 Data Interface Connections ............................................................10
3.0 OPERATION..............................................................................13
3.1 Initial Startup ..................................................................................13
3.2 LED Indicators ................................................................................13
4.0 TRANSCEIVER PROGRAMMING ............................................14
4.1 Radio Programming Methods ........................................................14
PC with Radio Configuration Software..........................................14
À PC in Terminal Mode....................................................................14
à Handheld Terminal (HHT).............................................................14
4.2 PC Connection and Startup ...........................................................14
4.3 Keyboard Commands .....................................................................16
Entering Commands.........................................................................16
Error Messages................................................................................16
4.4 Detailed Command Descriptions ...................................................18
ADDR [NONE | 1–255].....................................................................18
AMASK [0000 0000–FFFF FFFF] ....................................................18
BAUD [xxxxx abc].............................................................................19
CTS [0–255] .....................................................................................19
CTSHOLD [0–60000] .......................................................................19
MDS 05-3624A01, Rev. B OEM Series I/O Guide i
DEVICE [DCE | CTS KEY] ...............................................................20
DKEY................................................................................................20
INIT...................................................................................................20
KEY ..................................................................................................21
OWM [XXX...]...................................................................................21
OWN [XXX...]....................................................................................21
PWR [L | M | H].................................................................................21
RSSI and RSSI!................................................................................22
RX [xxx.xxx]......................................................................................22
RXTOT [NONE | 1–255] ...................................................................22
SER..................................................................................................22
SREV................................................................................................22
STAT .................................................................................................22
TOT [1–255 | ON | OFF] ...................................................................23
TX [xxx.xxx]......................................................................................23
5.0 TROUBLESHOOTING...............................................................24
5.1 LED Indicators ................................................................................24
5.2 Event Codes ...................................................................................24
Checking for Alarms—STAT command.............................................24
Major Alarms vs. Minor Alarms.........................................................25
Event Code Definitions.....................................................................25
6.0 TECHNICAL REFERENCE.......................................................26
6.1 OEM Series™ T ransceiv er Specifications ...................................... 26
6.2 Bench Testing Setup ......................................................................27
6.3 Helical Filter Adjustment ................................................................28
6.4 Upgrading the Radio’s Software .....................................................29
Using Radio Configuration Software.................................................30
6.5 dBm-Watts-Volts Conversion Chart ................................................31
7.0 GLOSSARY OF TERMS............................................................32
ii OEM Series I/O Guide MDS 05-3624A01, Rev. B
RF Exposure
Separation distances
required for FCC RF
Exposure compliance
Copyright Notice
This Installation and Operation Guide and all software described herein
are protected by copyright: 2001 Microwave Data Systems Inc . All
rights reserved.
Microwave Data Systems Inc. reserves its right to correct any errors and
omissions in this publication.
Antenna Installation Warning
1. All antenna installation and servicing is to be performed by
qualified technical personnel only . When servicing the antenna, or
working at distances closer than those listed below, ensure the
transmitter has been disabled.
Output is measured at the antenna terminal of the transmitter. The
antenna(s) used for this transmitter must be fixed-mounted on
outdoor permanent structures to provide the minimum separation
distances described in this filing for satisfying RF exposure
compliance requirements. When applicable, RF exposure
compliance may need to be addressed at the time of licensing, as
required by the responsible FCC Bureau(s), including antenna
co-location requirements of section 1.1307(b)(3).
2. Typically, the antenna connected to the transmitter is a directional
(high gain) antenna, fixed-mounted on the side or top of a building,
or on a tower. Depending upon the application and the gain of the
antenna, the total composite power could exceed 90 watts EIRP. The
antenna location should be such that only qualified technical personnel can access it, and that under normal operating conditions no
other person can touch the antenna or approach within
the antenna.
2.3 meters
of
Antenna Gain vs. Recommended Safety Distance
(EL705 OEM 900 Series)
Antenna Gain (EL705 OEMSeries)
0–5 dBi 5–10 dBi 10–18.65 dBi
Minimum RF
Safety Distance
0.53 meter 0.94 meter 2.58 meters
ISO 9001 Registration
Microwave Data Systems adheres to this internationally accepted
quality system standard.
MDS 05-3624A01, Rev. B OEM Series I/O Guide iii
MDS Quality Policy Statement
We, the employees of Microwave Data Systems Inc., are committed to
understanding and exceeding our customer’s needs and expectations.
• We appreciate our customer’s patronage. They are our business.
• We promise to serve them and anticipate their needs.
• We are committed to providing solutions that are cost effective,
innovative and reliable, with consistently high levels of quality.
• We are committed to the continuous improvement of all of our
systems and processes, to improve product quality and increase
customer satisfaction.
FM/UL/CSA Notice
This product is available for use in Class I, 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 three independent agencies —Underwriters Laboratories (UL), Factory Mutual Research Corporation (FMRC) and the Canadian Standards
Association (CSA). The UL certification for the transceiver is as a Recognized Component for use in these hazardous locations, in accordance
with UL Standard 1604. The FMRC Approval is in accordance with
FMRC Standard 3611. The CSA Certification is in accordance with
CSA STD C22.2 No. 213-M1987.
FM/UL/CSA Conditions of Approval:
The transceiver is not acceptable as a stand-alone unit for use in the haz-
ardous 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:
1. The transceiver must be mounted within a separate enclosure which
is suitable for the intended application.
2. The antenna feedline, DC power cable and interface cable must be
routed through conduit in accordance with the National Electrical
Code.
3. Installation, operation and maintenance of the transceiver should be
in accordance with the transceiver's installation manual, and the
National Electrical Code.
4. Tampering or replacement with non-factory components may
adversely affect the safe use of the transceiver in hazardous locations, and may void the approval.
iv OEM Series I/O Guide MDS 05-3624A01, Rev. B
5. When installed in a Class I, Div. 2, Groups A, B, C or D hazardous
location, observe the following:
WARNING —EXPLOSION HAZARD—
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.
Do not disconnect
ESD Notice (Board version only)
To prevent malfunction or damage to this product, which may be caused
by Electrostatic Discharge (ESD), the radio should be properly
grounded at the time of installation. In addition, the installer or maintainer should follow proper ESD precautions, such as touching a bare
metal object to dissapate body charge, prior to touching components or
connecting/disconnecting cables.
Cable Length Recomendation
MDS recommends a maximum cable length of 3.0 meters for DC power
and data connections to this product.
Revision Notice
While every reasonable effort has been made to ensure the accuracy of
this manual, product improvements may 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 our Customer Service Team using the information at the back of this
guide. In addition, manual updates can often be found on the MDS Web
site at
www.microwavedata.com
.
MDS 05-3624A01, Rev. B OEM Series I/O Guide v
vi OEM Series I/O Guide MDS 05-3624A01, Rev. B
1.0 INTRODUCTION
This guide presents installation and operating instructions for the MDS
OEM Series™ of radio transceivers. The radios can be purchased as
compact, modular boards for direct mounting inside remote terminal
units (RTUs), programmable logic controllers (PLCs), automatic
teller/banking machines, or similar equipment. They are also available
as standalone units packaged in their own enclosures (see lower cover
illustration).
Although this manual focuses on the board-level product, the operating
specifications and user connections are identical for both versions of the
radio. Only the visual appearance and mounting details differ between
the two. These differences are explained in the text where necessary.
The transceiver (Figure 1) is a data telemetry radio designed to operate
in a point-to-multipoint environment, such as electric utility
Supervisory Control and Data Acquisition (SCADA) and distribution
automation, gas field automation, water and wastewater SCADA, and
on-line transaction processing applications. The radio employs
microprocessor control to provide highly reliable communications, even
under adverse conditions.
MDS OEM Series™ radios use continuous-phase frequency shift
keying (CPFSK) modulation with a 4-level modem.
Invisible place holder
NOTE: FINAL DESIGN WILL EMPLOY
A TWO-PIN, POLARIZED POWER
CONNECTOR.
Figure 1. OEM Series™ Series Data Transceiver
(Board version shown—enclosed unit similar)
1.1 Differences Among Models
All OEM Series™ models are very similar in appearance and
functionality. The major differences are over-the-air modem speed and
frequency coverage.
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 1
Modem Speeds
Two modem speeds are available in the OEM 900 transceiver—
standard 9600, and an optional 4800 bps. The latter provides 3 dB of
extra receive sensitivity where greater range is required.
Changing the modem speed requires loading different software into the
radio using MDS’ Radio Configuration Software. See
Programming Methods
Frequency Coverage
The OEM 900 Series radio operates in the 900 MHz frequency band.
The exact frequency coverage of each model is listed in the
Specifications chart on Page 26.
NOTE: The radio’s frequency range (band) cannot be set or changed
by the user; it is set at the factory.
on Page 14 for more information.
Radio
1.2 Applications
Point-to-Multipoint, Multiple Address Systems (MAS)
Point-to-multipoint (MAS) is the most common application of the
transceiver. It consists of a central master station and several associated
remote units as shown in Figure 2. An MAS network provides
communications between a central host computer and remote terminal
units (RTUs) or other data collection devices. The operation of the radio
system is “transparent” to the computer equipment. That is, the radio
system transports the data in its original form, making no changes to the
data format.
Often, the radio system is used to replace a network of remote monitors
currently linked to a central location by leased telephone lines. At the
central office of such a system, there is usually a large mainframe
computer and some means of switching between individual lines
coming from each remote monitor. In this type of system, there is a
modulator/demodulator (modem) at the main computer and at each
remote site, usually built into the remote monitor itself. Since the cost of
leasing a dedicated-pair telephone line is quite high, radio is frequently
used as an alternative communication medium.
2 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B
Invisible place holder
radio
REMOTE
radio
REMOTE
COMPUTER
HOST
radio
MASTER
STATION
RTU
RTU
Figure 2. MAS Point-to-Multipoint Network
(Two remote stations shown—four or more are typically used)
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
serving as a master and the other as a remote—as shown in Figure 3. It
provides a simplex or half-duplex communications link for the transfer
of data between two locations.
Invisible place holder
radio
COMPUTER
HOST
RTU
MASTER
STATION
Figure 3. Typical Point-to-Point Link
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 3
radio
REMOTE
Switched Carrier Operation
Switched Carrier operation is a half-duplex mode where the master
station transmitter is keyed to send data and unkeyed to receive. MDS
OEM Series™ radios operate in switched carrier mode and are keyed
when data is present.
NOTE: MDS OEM Series™ radios do not support full-duplex
operation (i.e., transmitting and receiving at the same time).
For information on other MDS products that provide this
capability, contact your sales representative.
Single Frequency (Simplex) Operation
Single frequency operation (also known as simplex) is a special case of
switched carrier operation. Single frequency operation is
automatically
selected whenever the transmit and receive frequencies are set to the
same value.
THIS INFORMATION IS
SUBJECT TO
CHANGE.
DO NOT USE FOR
PRODUCT ORDERING.
1.3 Model Number Codes
The radio model number is printed on the PC board or on the radio
enclosure, and provides key information about how the radio was
configured when was shipped from the factory. See Figure 4 for an
explanation of the model number characters.
Invisible place holder
BANDWIDTH
1 = 12.5 kHz Domestic
ENCLOSURE
0 = Without Enclosure
1 = With Enclosure
EL705
BAND SUB-BAND
9 = 900 MHz A = 928–960 MHz
NA
AGENCY
F = FCC/IC
N = None
Figure 4. MDS OEM Series™ Model Number Codes
SAFETY
N = None
E = Class 1, Div. 2 ENTLA
N
MODEM
2 = 4800 BPS
3 = 9600 BPS
4 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B
1.4 Accessories
The transceiver can be used with one or more of the accessories listed in
Table 1. Contact the factory for ordering information.
Table 1. Optional Accessories
Accessory Description MDS P/N
Hand-Held Terminal
Kit (HHT)
Accessory Power
Adapter
RTU Simulator Assy. Test unit that simulates data from a
DB-9 to DB-25 adapter Used to connect a PC with a 9-pin
Radio Configuration
Software (EL705)
PC Programming
Adapter Kit
Keypad terminal for programming,
diagnostics, and control. Includes
carrying case, cable set and an
instruction booklet. (Accessory Power
Adapter 03-3722A01 required for use
with OEM radios—see below).
DB-25 male-to-female adapter that
attaches to the radio’s DATA
INTERFACE connector. Provides
regulated 10 Vdc for powering an HHT
or other low power accessory. If not
used, accessories could be damaged
by excessive voltage (equal to the
radio’s DC input voltage).
remote terminal unit. Comes with
polling software that runs on a PC.
Used for testing OEM radio operation.
(NOTE: Older MDS RTU Simulators
will
not
work with the OEM radio as
they require a higher input voltage.)
serial port to the radio’s DATA
INTERFACE port.
Radio programming software for use
with a Windows-based PC. This
program is available on 3.5” disks, and
is included on the MDS’ InSite 6.4 (or
higher) CD.
Required when programming the radio
with a personal computer operating in
terminal mode. The adapter asserts
the auto-open signal (ground) on pin
23 of the DATA INTERFACE port. A
scratch-built cable may also be used
for this purpose (see Figure 12 on
Page 16).
02-1501A01
03-3722A01
03-2094A01
01-3683A01
03-3649A01
01-3683A01
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 5
2.0 INSTALLATION
There are three main requirements for installing the transceiver—
adequate and stable primary power, a good antenna system, and the
correct data connections between the transceiver and the data device.
Figure 5 shows the external connections for the transceiver.
Invisible place holder
POWER CONNECTOR*
(TIP/RING BARREL TYPE)
DATA INTERFACE
Final model will have a polarized
*
2-pin power connector (plug & cable
assembly included). Red wire is
positive(+); black is negative (-).
CONNECTOR
(DB-25)
ANTENNA
CONNECTOR
(BNC)
Figure 5. External Connections to the Transceiver Board
(Connector locations identical to enclosed radio)
2.1 Installation Steps
Below are the basic steps for installing the transceiver. In many cases,
these steps alone are sufficient to complete the installation. More
detailed explanations appear at the end of these steps.
1. Mount the transceiver to a stable surface using the appropriate
hardware.
2. Install the antenna and antenna feedline for the station. Preset
directional antennas in the desired direction of transmission and
reception.
3. Measure and install the primary power for the radio. The primary
power must be between 10 and 16 Vdc and be capable of supplying
at least 2 Amperes. (This requirement assumes a 5 watt RF output.
Lower current consumption is possible if lower output po wer can be
used in your application—see OEM Series™ Transceiver
Specifications on Page 26 for details.)
NOTE: Use the radio in negative ground systems only.
6 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B
4. Set the radio configuration. The transceiver is designed for quick
installation with a minimum of software configuration in most cases.
The selections that need to be verified for new installations are:
• Transmit frequency
• Receive frequency
• Transmitter output power
• Network address (factory default is
NONE)
The operating frequencies are not set at the factory unless they are
specified at the time of order. Determine the transmit and receive
frequencies to be used, and follow the steps below to program them.
5. Connect a terminal interface (personal computer or a hand-held
terminal) to the
DATA INTERFACE connector. (See PC Connection
and Startup on Page 14 for details.)
6. Press to receive the ready “>” prompt.
ENTER
a. Set the transmit frequency with the TX xxx.xxx command.
Press after the command.
b. Set the receive frequency with the
Press after the command.
c. Set the network address with the
Press after the command. After programming, the
terminal interface reads
ENTER
RX xxx.xxx command.
ENTER
ADDR xxx command.
ENTER
PROGRAMMED OK to indicate successful
entry.
7. Disconnect the terminal interface from the
DATA INTERFACE
connector.
8. Connect the data equipment to the transceiver’s
DATA INTERFACE
connector. Use only the required pins for the application—do not
use a fully pinned (25 conductor) cable. Basic applications often
require only the use of Pin 2 (Transmitted Data—TXD), Pin 3
(Received Data—RXD), and Pin 7 (Signal Ground).
Additional connections may be required in some installations. Refer
to the complete list of pin functions in Table 3 on Page 11.
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 7
2.2 Mounting the Transceiver
Transceiver Board
Figure 6 shows the mounting dimensions of the transceiver PC board.
The board should be secured to the mounting surface using the holes
provided at each corner of the assembly. (Fasteners are not supplied.)
Note that the lower left mounting hole in the board is a threaded ferrule.
Invisible place holder
4.53 in.
(11.51 cm)
0.23 in.
(0.58 cm)
3.23 in.
(8.20 cm)
RF
HEATSINK
1” in.
(2.54 cm)
2.5 in.
(6.35 cm)
DATA
PWR
3.73 in.
(9.47 cm)
0.28 in.
(0.71 cm)
HEATSINK HEIGHT: 0.38” (0.97 cm)
4.05 in.
0.28 in.
(0.71 cm)
(10.29 cm)
0.20 in.
(0.51 cm)
Figure 6. Transceiver Mounting Dimensions (Board Version)
Enclosed Transceiver
Figure 7 shows the mounting dimensions of the enclosed transceiver.
Two cutout slots are provided on each side of the enclosure for
mounting screws. (Fasteners are not supplied.)
Invisible place holder
1.75 in.
(4.45 cm)
5.97 in.
(15.14 cm)
6.50 in.
(16.51 cm)
Figure 7. Transceiver Mounting Dimensions (Enclosed Version)
3.25 in.
(8.25 cm)
5.00 in.
(12.70 cm)
8 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B
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