<![CDATA[
<BODY TEXT=#000000 LINK=#0000FF VLINK=#FF0000 BGCOLOR=#FFFFFF >
<BASE TARGET="_top">
<DIV class=s0>
<FONT style='color:#008080;font-size:18pt;'><B><I>CrosStar MD-201 Bell 202 Modem With DF1 To HDLC Protocol Converter</I></B></FONT></DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
The CrosStar MD-201 Modem is a half-duplex Frequency-Shift-Keyed (FSK) audio tone modem with integral protocol converter.</DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
The MD-201 Modem operates at 1200 baud on private leased telephone lines, voice/audio radio links, or any dedicated two wire circuit. The MD-201 has dual isolated audio ports plus a radio Push-To-Talk (PTT) output, so it can operate both telephone and radio circuits simultaneously, providing active audio mixing to prevent impedance mismatching. Both two-wire and four-wire telephone circuits can be interfaced easily to the modem. A Modified HDLC protocol is used over the audio link which interfaces to several legacy telemetry systems. The MD-201 can operate as either the telemetry master or remote.</DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
SCADA equipment connects to the MD-201 Modem by an RS-232 Data Communications Equipment (DCE) 9-Pin Connector. Data is exchanged at 9600 baud using Allen-Bradley's DF1 protocol.</DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
The MD-201 Modem has ten colored LED lights on the front panel displaying the status of both the HDLC Modem and the RS-232 DF1 signals. Three connectors on the rear panel provide interconnection for the power input and radio terminals, a telephone line modular jack, and the RS-232 DCE connection. Internal controls are provided to adjust the audio level on the radio connector, and to select the operational mode of the protocol converter.</DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
Suggested uses for the MD-201 Modem include interfacing newer SCADA computer equipment to legacy radio/private leased telephone line based telemetry systems, and integrating remote PLCs in to legacy telemetry systems.</DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
<IMG SRC="MD-201Front.jpg" BORDER=0 ALIGN=MIDDLE WIDTH=500 HEIGHT=240 ></DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
<FONT style='color:#008080;font-size:14pt;'><B>Features</B></FONT></DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
<B>Single 12V Power Requirements.</B></DIV>
<DIV class=s0>
<B>Provides Protocol Conversion between Allen-Bradley DF-1 and Modified HDLC.</B></DIV>
<DIV class=s0>
<B>ABS plastic enclosure.</B></DIV>
<DIV class=s0>
<B>Compatible with both Dedicated Telephone lines and Radio Systems.</B></DIV>
<DIV class=s0>
<B>Easily works with both two-wire and four-wire telephone circuits.</B></DIV>
<DIV class=s0>
<B>Signal Status lights on front panel.</B></DIV>
<DIV class=s0>
<B>Simple installation, no jumpers.</B></DIV>
<DIV class=s0>
<B>Radio audio adjustments provided.</B></DIV>
<DIV class=s0>
<B>Extends the Operational Lifespan of Legacy Telemetry Systems.</B></DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
<FONT style='color:#008080;font-size:14pt;'><B>Specifications</B></FONT></DIV>
<DIV class=s0>
<TABLE WIDTH="70%" BORDER="0" CELLPADDING="2" CELLSPACING="2" >
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#000080;font-size:13pt;'><B>Electrical</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Supply Voltage:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>10 to 24 VDC, 12 V Recommended</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Supply Current:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>140 MilliAmps</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#000080;font-size:13pt;'><B>Indicators</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Front Panel:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>Four HDLC Modem Status LEDs:</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> TX On- Transmit On, Red</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> TD- Transmit Data, Green</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> CD- Carrier Detected, Yellow</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> RD- Received Data, Red</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>Six DF1 Interface Status LEDs:</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> FLT - DF1 Message Fault, Red</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> RPT - Remote Being Repeated, Yellow</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> RTS - RS-232 Request To Send, Green</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> TX - RS-232 Transmit Data, Red</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> RX - RS-232 Receive Data, Red</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B> DF - Remote Data Failed, Yellow</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#000080;font-size:13pt;'><B>Communications: Modem</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Baud Rate:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>1200BPS Half-Duplex.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Protocol:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>Modified HDLC with NRZ.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>Selectable Between Telemetry Master and Telemetry Remote Operations via Internal Switch.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Tone Frequencies:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>Mark: 1200 Hz Space: 2200 Hz</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Phone Line:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>Two-Wire or Four-Wire, RJ-11 jack.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Line Level:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>0 dBm, 600 ohms, Matches 150 to 900 ohm Dedicated Telephone Lines.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Radio Terminal:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>7 Pin P1uggable Connector.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Radio Speaker Input:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>4 to 50 ohm, Voltage Isolated.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Radio Mic Output:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>-45 to -8 dBm, Adjustable with Internal Control.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Radio PTT Output:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>Open Collector 60VDC Transistor, Controlled by RTS.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#000080;font-size:13pt;'><B>Communications: RS-232</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>RS-232 Connector:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>DB-9F configured as DCE (modem) provides TXD, RXD, RTS, DSR, CTS, & CD Signals.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Baud Rate:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>9600BPS Full-Duplex Eight Bit Data, One Stop Bit, No Parity.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Protocol:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>Allen-Bradley DF-1 for PLC-5 Full Duplex with BCC Error Detection.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#000080;font-size:13pt;'><B>Physical</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Size:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>5.5 W x 2.0 H x 5.375 D inches.
</B></FONT></DIV>
</TD></TR></TABLE></B></DIV>
<DIV class=s0>
<TABLE WIDTH="70%" BORDER="0" CELLPADDING="2" CELLSPACING="2" >
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Weight:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>14 oz.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Temperature:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>0 to 65° C.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Humidity:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>10 to 90%, Non-condensing.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#0000FF;'><B>Enclosure:</B></FONT></DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
<FONT style='color:#800000;'><B>ABS Plastic Desktop Style, Optional Chassis Mount Available.</B></FONT></DIV>
</TD></TR>
<TR>
<TD WIDTH=20% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD>
<TD WIDTH=50% VALIGN=TOP >
<DIV class=s1>
</DIV>
</TD></TR></TABLE></DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
<FONT style='color:#008080;font-size:14pt;'><B>Documents</B></FONT></DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
<FONT style='color:#000080;font-size:12pt;'><A HREF="ftp://crosstar.com/CrosStar MD-201 Modem Data Sheet.pdf">MD-201 Modem Data Sheet in .pdf format</A></FONT></DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
</DIV>
<DIV class=s0>
<FONT style='color:#800000;font-size:10pt;'>Made In the United States of America.</FONT></DIV>
<DIV class=s0>
<IMG SRC="crosstar_i000001.jpg" BORDER=0 ALIGN=MIDDLE WIDTH=741 HEIGHT=8 > </DIV>
<DIV class=s2>
<FONT style='color:#000080;font-size:8pt;'>© Copyright 2005 CrosStar, LLC. All Rights Reserved.</FONT></DIV>
</BODY></HTML>
]]>