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BAUDMASTER Converts RS-232 to RS-422 and RS-485 RS-422 to RS-232 and RS-485 RS-485 to RS-232 and RS-422
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Division of Electronic Solutions Inc.
INNOVATIVE I/O SINCE 1977
PROBLEM SOLVER
RS-232/422/485
Isolates and Protects BaudMasterTM eliminates ground loops that destroy computer ports and reduce serial communication reliability. Provides 1200 volts isolation between a computer and equipment, using optical and transformer technology. All communication lines are transient protected.
No Jumpers or Switches BaudMasterTM automatically adapts to rates up to 115K baud and varying word length. There are no jumpers or switches to set.
Painless RS-485 BaudMasterTM automatically controlls RS-485 transmitters eliminating the need for software handling. The new technology, which makes this possible is covered by US patent 5,729,547 and virtually guarantees that RS-485 networks will work the first time.
Extends Range to 4,000 Feet BaudMaster TM , operating as a range extender, allows networks to grow in 4,000 foot increments. When used in pairs, BaudMasters become short haul modems for RS-232.
RS-422/ 485 Y Networks Where continuous RS-422/ 485 networks are not feasible, BaudMasterTM provides the means to implement Y networks.
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Troubleshooting Tool Transmit and receive LEDs on both the equipment and line sides of the BaudMasterTM confirm that data transmission and reception are occurring. When used with a notebook computer (see reverse page diagram), live RS-422/ 485 traffic can be monitored. Now you can see what’s happening on communication lines.
9-24 Volt AC/DC Powered BaudMasterTM uses any 9-24 volt, ac or dc power source. Wall-plug adapters are available from duTec or others. Screw terminals are also provided for use with other power supplies.
6979 Wales Road, Northwood, Ohio 43619 Phone: 419-666-4700, Toll Free 800-248-1632 Fax: 419-666-4702 Email:
[email protected] Website: http://www.baudmaster.com
Specifications Isolation:
1200V, Equipment -to- Line -to- Power
Baud Rates: Up to 115K baud Range:
4,000 feet (1220 meters) @ 38.4K baud with 24 AWG twisted pair
Connections Equipment Side RS-232 RS-422/ 485
DB9F #16 screw terminals
Power:
9 - 24 Vac/dc @ 170 mA nominal
Line Side RS-422/ 485 Termination resistors Biasing resistors Power Wall-plug adapter Direct
Enclosure:
Stainless Steel; weight 11 oz (308 gms) 3“ H x 5” W x 1” D 76 mm x 127 mm x 25 mm
Power Rx, Tx Line Side Equipment Side Rx, Tx
Drive:
Up to 32 RS-422/ 485 receivers
Compliance: CE, FCC Class A
#16 screw terminals Not included 10K ohms Power Jack, 0.1“ dia #16 screw terminals
Indicators
Red LED Red LEDs Red LEDs
Ordering Information Item BaudMaster BaudMaster CE*
Part Number Item Wall-plug Adapter, 120 Vac* BM-PS120 Wall-plug Adapter, 220 Vac* BM-PS220 BM-PSU Wall-plug Adapter, Universal *Includes snap-on EMI limiting Ferrite that must be attached to dc power leads from BM-PS120 or BM-PS220 power supplies to meet CE requirements. Part Number BM-100 BM-100CE
Typical Applications Y Networks
Isolators / Convertors RS-232 to RS-485
RS-232 to RS-422 Equipment Side +A -B +A -B
RS-232
Line Side RS-422 Tx
RS-232
RS-422
+A -B +A -B
Rx
Equipment Side +A -B +A -B
RS-232
-B +A -B
Rx RS-422 Tx
RS-485 RS-422 RS-485
TM
Equipment Side RS-485 +A RS-485
RS-422
+A -B +A -B
-B +A -B
Equipment Side
Line Side
+A -B +A -B
RS-485
+A -B +A -B
Alternative:
RS-485
Half Duplex One Twisted Pair
RS-422 (full duplex) using two twisted pairs.
-B +A -B +A
RS-232
RS-485 +A -B +A -B
TM
BaudMaster TM
RS-422 RS-485
Equipment Side
Line Side
TM
BaudMaster
Line Side
+A -B +A -B
TM
+A -B +A -B
RS-422
RS-232
RS-485
BaudMaster
RS-232
RS-485 to RS-485
Line Side
-B +A -B +A
BaudMaster
BaudMaster
RS-485 to RS-422 Equipment Side RS-485 +A RS-485
RS-485 RS-232
TM
+A -B +A -B
Equipment Side
Line Side
RS-485
Line Side
RS-422 RS-485
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BaudMaster
BaudMaster
Multipoint Networks
Range Extender / Short Haul Modem 4000 Feet (1220 Meters) per Extender
RS-422 RS-485
Equipment Side
RS-232
Line Side
+A -B +A -B
+A -B +A -B
Rx RS-422 Tx 9-Pin RS-232
RS-422 RS-485
TM
RS-422 RS-485
Equipment Side
Line Side -B +A -B +A
RS-232
Tx RS-422 Rx
BaudMaster
Equipment Side
>00AA1 RS-232
+A -B +A -B
RS-485
RS-422 RS-485
+A -B +A -B
RS-232
Alternative:
TM
BaudMaster
Full Duplex Two Twisted Pair
RS-232
RS-485 +A -B +A -B
TM
+A -B +A -B
BAUDMASTER to I/O Plexer Connections
>00AA1
Equipment Side +A -B +A -B
Rx RS-422 Tx
Control Computer
Connect to either the Rx pair or Tx pair to monitor the RS-422 data at any point on the lines. Use a BaudMaster on an RS-485 network to monitor bidirectional data to any piece of equipment. Just add a parallel set of wires from the Baudmaster to the RS-485 connection
RS-232 Control Computer
+A -B +A -B
Line Side RS-422
+A -B +A -B TM
BaudMaster
RS-422 RS-485
Equipment Side
Line Side -B +A -B +A
RS-232 to RS-422 Converter
AFF00
RS-232
RS-485
BaudMaster
TM
>00AA1
-B +A -B +A
Line Side
RS-485
Equipment Side
Line Side
RS-422
+A -B +A -B
RS-485 (half duplex) using one twisted pair
BaudMaster
>00AA1 AFF00
Line Side
TM
A Troubleshooting Tool
Monitor the data with a notebook computer
+A -B +A -B
BaudMaster +A -B +A -B
TM
BaudMaster
Equipment Side
RS-422 RS-485
DuTec I/O Plexer Host RS-232 Port
+A - B
Rx From Prior
G +A - B - B
Tx
+A G - B +A
To Prior Rx From Next To Tx Next
