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05-4692A01, Rev. 03 (FCC) MDS SD Series Quick Start Guide (x710 Mode) 1

MDS SD2 Transceiver

Quick Start Guide (x710 Mode)

The MDS SD2 transceiver (Figure 1) is a software-configurable,

industrial solution for use in wireless telemetry applications. The

unit operates in the 216 to 222 MHz frequency band.

The radio interfaces with a variety of data control equipment such

as remote terminal units (RTUs), programmable logic controllers

(PLCs), flow computers, and similar devices. Data interface con-

nections may be made by both serial (RS-232/485) and limited

Ethernet protocols.

Invisible place holder

Figure 1. MDS SD2 Data Transceiver

There are three main requirements for installing the transceiver:

• Adequate and stable primary power

• An efficient and properly installed antenna system

• Correct interface connections between the transceiver and

the data device.

Figure 2 shows a typical installation of the radio.

NOTE: Retrofit Kits are available to simplify installation at former

MDS x710 digital and analog sites. Consult the Refer-

ence Manual for ordering details.

2.1 Installation Steps

In most cases, the steps given here are sufficient to install the

transceiver. Refer to the Reference Manual for additional details,

as required.

1. Mount the transceiver using the brackets supplied. Attach

the brackets to the bottom of the transceiver case (if not

already attached), using the four 6-32 x 1/4 inch (6 mm)

screws supplied. Mounting bracket dimensions are shown in

Figure 3. If DIN Rail mounting brackets are to be used, consult

the Reference Manual.

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.

CAUTION:Using screws longer than 1/4 inch (6 mm) to attach the

brackets to the radio may cause internal damage. Use

only the screws supplied.

Figure 2. Typical Installation (Remote Site Shown)

Figure 3. Mounting Bracket Dimensions

2. Install the antenna and feedline. The antenna used with the

radio must be designed to operate in the radio’s frequency

band, and be mounted in a location providing a clear path to

the associated station(s). At Remote sites, aim directional

antennas toward the Master Station. Low loss coaxial feedline

should be used and it should be kept as short as possible.

3. Connect the data equipment. Connection may be made to

the COM port using Serial protocols (RS-232/RS-485).

• Connect your data equipment to the appropriate serial port

on the front panel. (Typically, COM2 is used for connecting

data equipment, and COM1 is used for management of the

radio. Other arrangements are possible. Refer to the Refer-

ence Manual for details.) In all cases, the radio is hardwired

as a DCE device. A straight-thru cable may be used for most

applications.

4. Connect primary power. Input power must be 10.0 to 30 Vdc

and capable of providing at least 2.5 Amperes. A power con-

nector with screw-terminals is provided with the unit (see

1.0 INTRODUCTION

2.0 INSTALLATION

ANTENNA

CONNECTOR (TNC)

SERIAL DATA

CONNECTORS (DB-9)

DC INPUT

POWER

LED INDICATOR

PANEL

ETHERNET

CONNECTOR (RJ-45)

COM1 used for radio management

DC POWER SUPPLY

Negative Ground Only

TRANSCEIVER

LOW-LOSS FEEDLINE

ANTENNA SYSTEM

SERIAL

Master Stations typically use

omni-directional antenna

DATA TELEMETRY

DEVICE

7.25˝ (16.99 cm)

2.75˝ (7 cm)

Summary of content (4 pages)

PAGE 1
MDS SD2 Transceiver Quick Start Guide (x710 Mode) 1.0 ANTENNA SYSTEM Master Stations typically use omni-directional antenna INTRODUCTION The MDS SD2 transceiver (Figure 1) is a software-configurable, industrial solution for use in wireless telemetry applications. The unit operates in the 216 to 222 MHz frequency band. The radio interfaces with a variety of data control equipment such as remote terminal units (RTUs), programmable logic controllers (PLCs), flow computers, and similar devices.
PAGE 2
Figure 4). Strip the wire leads to 6 mm (1/4 inch) and insert them into the wire ports. Be sure to observe proper polarity as shown below. Tighten the binding screws securely. MODEM command. Use MODEM [xxxx] if changes are required, where xxxx represents the modem speed in bps. When finished with the steps above, review the other configuration options to determine if other settings are required for your system. Table 3 lists key software commands for the radio. 2.2 Figure 4.
PAGE 3
• An efficient and properly aligned antenna system providing adequate received signal strength. • Proper programming of the transceiver’s parameters • The correct interface between the transceiver and the connected data equipment (correct cable wiring, proper data format, timing, etc.) 3.1 4.2.1 Pin Descriptions—RS-232 Mode Table 2 provides pin descriptions for the connector when operating in RS-232 mode. For RS-422/485, refer to the Reference Manual. NOTE: The radio is hard-wired as a DCE device.
PAGE 4
Table 3: Key Software Commands Command Function ALARM Read current operating condition of the radio. BAUD [xxxxx abc] Set/display the data rate and control bits. BUFF [ON, OFF] Enables or disables the internal radio data buffer. CTS [0-255] Set/display the Clear-to-Send delay in seconds. DEV Display modem control deviation. DEVICE [DCE, CTS KEY] Set/display device mode. DKEY Dekey the radio (transmitter OFF). This is generally a radio test command. DUMP Display all programmable settings.