B+B SmartWorx 4WSD9R Quick Start Manual
Text of the manual
You can perform a loopback test by connecting either
an RS-232 to RS-422/485 converter or a USB to RS-
422/485 converter to the 4WSD9R(4WSD9TB).
Using HyperTerminal or a similar program, connect to
the appropriate COM port. Remember to set the baud
rate to 9600. Turn off HyperTerminal local echo. Start
typing. If you can see the data you are typing, the
loopback is successful.
Loopback Test
7
Bias is provided by 4.7kΩ pull-up/down resistors on
the Data-In lines. This value is adequate for most
applications without termination. If another value is
required, space is provided on the PC for through-hole
resistor placement (R12, R21, R14, and R23).
Biasing
8
Recommended Accessories
DB9 Male to DB9 Female Cable,
1.8 m (6 ft) length
# 9PAMF6
12VDC, 6W Power Supply, 2.5mm Plug,
International AC Input
# SMi6-12-P230-C1
1-888-948-2248 | Europe: +353 91 792444
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707 Dayton Road | PO Box 1040 | Ottawa, IL 61350
Phone: 815-433-5100 | Fax: 815-433-5109
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QUICK START
GUIDE
Document Number: 710-10715-00_r1_4WSD9x_4617qsg
Before you begin, be
sure you have the following:
Models 4WSD9R, 4WSD9TB
Port-Powered RS-232 to RS-485 Converter
+ RS-232/485 Isolated Converter
(#4WSD9R or #4WSD9TB)
+ DB9 to DB9 Adapter Cable (not included)
+ 12VDC, 6W Power Supply (not included)
Models 4WSD9R & 4WSD9TB convert RS-232 signals to
RS-422/RS-485 and vice versa. RS-232 TD signals are
converted to balanced RS-422 or RS-485 signals. RD RS-
422/485 signals are converted to RS-232.
Table 2. RS-422/485 PINOUT
PIN #
SIGNAL
2
RD (A)-
3
TD (B) +
4
GND
6
GND
7
RD (B)+
8
TD (A)-
Table 1. RS-232 PINOUT
PIN #
SIGNAL
1
DCD
2
RD
3
TD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
RS-422-RS-485
3
Automatic Send Data Control
5
Unlike converters that require programming the hardware
handshake signals to control RS-422/RS-422 operation,
Models 4WSD9TB or 4WSD9R provide Automatic Send
Data Control, enabling the driver only when transmitting:
In RS-485 Modes, the RS-485 driver is enabled by
circuitry which senses the RS-232 TD Input.
In RS-485 Half-Duplex Mode, the receiver is enabled
when not transmitting (Echo Off).
In RS-485 Full-Duplex Mode, the receiver is always
enabled.
In RS-422 Full-Duplex Mode, the transmitter and
receiver are always enabled.
Table 3. SWITCH SETTINGS
RS-485 2-Wire Half-Duplex
SWITCH #
POSITION
1
RS-485
2
Echo Off
3
2-wire
4
2-wire
Table 4. SWITCH SETTINGS
RS-485 4-Wire Full-Duplex
SWITCH #
POSITION
1
RS-485
2
Echo On
3
4-wire
4
4-wire
Table 5. SWITCH SETTINGS
RS-422 4-Wire Full-Duplex
SWITCH #
POSITION
1
RS-422
2
Echo On
3
4-wire
4
4-wire
DIP Switch Settings
6
Mode Wiring Examples
4
