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INSTALLATION INSTRUCTIONS
MODEL RS422232
Bi-Directional RS422/RS232 Converter
Figure 1 – RS422232 Converter
INTRODUCTION
RS232 is an un-balanced serial data format allowing for transmission lengths up to 100ft. This
distance specification limits the use of this format when used in residential and commercial
automation control system applications. RS422 is a balanced serial data format with a distance
specification of up to 4000ft allowing for a more flexible automation control system configurations.
Xantech’s RS422232 Converter is a bi-directional serial converter, converting between these two
formats, in-turn, increasing the maximum distance RS232 devices can be used in.
This product serves two main functions:
1. Convert standard Serial RS232 signals to a balanced RS422 line allowing for increased
transmission lengths in upwards of 4000ft over a single CAT5 cable.
2. Companion accessory to the SmartPad LCD™ Touch Screen Panels Serial RS422
output, allowing the SPLCD to control a multitude of RS232 dev ices in remote locations.
FEATURES / SPECIFICTIONS
• RS232 I/O Connection: Connects to RS232 Devices via a standard DB9 connection wired to standard
PC Serial Port Specifications.
• RS422 I/O Connection: Standard RJ45 connection.
• RS422 Wiring: CAT5 or higher up to 4000ft (under ideal wiring conditions) wired to the
ETIA/TIA 568B standard.
• RS232 Wiring: Standard Serial DB9 cable up to 100ft (under ideal wiring conditions).
Note: Since the RS422232 converter allows RS232 to be run over long distances, it is recommended
that the unit be placed as close to the RS232 device as possible.
• Data Tx/Rx LED: Green LED indicating Data is being transmitted through both data ports.
• Power Requirement: Regulated 12VDC Power is required. (Xantech 781RG Power supply included)
• Power Connection: 2.1mm Coaxial Plug (Center Pin=12VDC; Sleeve=Chassis GND)
• Power Indicator LED: Red LED indicating presence of 12VDC power.
• Current Rating: 75mA @12VDC
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APPLICATION WIRING
Application #1: Use with SmartPad LCD™ Touch Screen Panel
: This RJ45 Terminated CAT5 cable needs to be wired in a pin-to-pin configuration.
Note
1
: The RS422232 may be placed at a maximum distance of 4000ft. from the SmartPad
Note
2
LCD™ Display.
Note
: Some Serial devices require the use of a ‘Null Modem’ cable or connector for proper
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communication. You will need to consult the products instruction manual to see if this is
required. Refer to Table 1A for Xantech Model RS422232 Pin Out information.
See Figure 2 for reference.
DB9 IO for local Control of RS232
Devices (i.e. Projector, Lighting
Control Systems, PC Control etc.)
r
to
r
e
v
n
o
C
2
3
2
S
R
to
2
Xantech Model RS422232
2
4
S
R
CAT5 Wire
Up to 4000
(Terminate in RJ45)
Requires 12VDC Power Supply
(Xantech Model 781RG)
Figure 2: RS422232 Wiring to SmartPad LCD™
1. Connect one end of an RJ45 terminated CAT5 cable to the connector labeled SERIAL on
the rear of the SmartPad LCD™ Display.
2. Connect the other end of this CAT5 cable to the connector labeled SERIAL on the
RS422232 converter located at the remote location within close proximity (less than 50ft
for bi-directional communication) to the Serial dev ice to be controlled.
3. Connect a Female DB9 terminated serial cable to the RS422232 connector labeled
RS232.
4. Connect the other end of this cable to the Serial device being communicated to. (See
above)
Note
3
5. Connect the included 781RG 12VDC power supply to the 2.1mm Coaxial Power jack on
the RS422232 Converter.
Application #2: Use as a standalone device to increase standard Serial communication
distance between two (2) Serial RS232 Devices.
: This will require the use of two (2) RS422232 Units. One placed at one Serial Device
Note
4
location and another placed at the other Serial Device location.
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Note
: This RJ45 Terminated CAT5 cable needs to be wired in a X-Over pin configuration.
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See Table 1B for Wiring information
: The two (2) RS422232’s may be placed at a maximum distance of 4000ft. from each
Note
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other.
See Figure 3 for reference.
1. Connect one end of an RJ45 terminated CAT5 cable to the SERIAL port of one
RS422232 unit and connect the other end to the SERIAL port on the other RS422232
unit. (See Note
)
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2. Connect the female DB9 RS232 Ports of each RS422232 to the devices to be
communicated to.
3. Connect a Female DB9 terminated serial cable to the RS422232 connector labeled
RS232.
4. Connect each of the included 781RG 12VDC power supply to the 2.1mm Coaxial Power
jack on each RS422232 Converter.
Requires 12VDC Power Supply
(Xantech Model 781RG)
To RS232 Device
RS232
ACTIVITY
POWER
RS422 TO RS232 MODULE
SERIAL +12VDC
RS422232
CAT5 Wire Up to 4000ft.
Connector A
Connector B
RS422232
SERIAL +12VDC
RS422 TO RS232 MODULE
POWER
ACTIVITY
To RS232 Device
RS232
Requires 12VDC Power Supply
(Xantech Model 781RG)
Figure 3: Extending RS232 Devices (See Table 1B for CAT5 Wiring)
Pin # WIRE COLOR Connector A Connector B WIRE COLOR Pin #
Pin #
SERIAL RS232
1 RD_SER + 1 Orange/White RD_SER + TD_SER + Green/White 1
2 RD_SER - Rx 2 Orange RD_SER - TD_SER - Green 2
3 TD_SER + Tx 3 Green/White TD_SER + RD_SER + Orange/White 3
4 RTS_SER - 4 Blue RTS_SER - CTS_SER - Brown 4
5 RTS_SER + GND 5 Blue/White RTS_SER + CTS_SER + Brown/White 5
6 TD_SER - 6 Green TD_SER - RD_SER - Orange 6
7 CTS_SER + RTS 7 Brown/White CTS_SER + RTS_SER + Blue/White 7
8 CTS_SER - CTS 8 Brown CTS_SER - RTS_SER - Blue 8
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Table 1A: RS422232 Pin Out
Table 1B: CAT5 X-Over Cable for Combining 2 RS422232 Units
XANTECH CORPORATION
13100 Telfair Avenue, Sylmar CA 91342-3829
phone 818.362.0353 • fax 818.362.9506
www.xantech.com
Part No. 08904990 Rev A 04-16-2004
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