KSH International SC-101 User manual

SC-101
User’s Manual
RS232 to RS422/485 Converter
1. Introduction
The SC-101 allows RS232 line signal bi-directionally convert to RS422 or RS485 standard. Featuring
data format DIP switching and baud rate auto switching (from 110bps to 115.2Kbps) users just need to
plug the unit and go without software or hardware complicated setting. The RS485 control is completely
transparent to the user and software written for Half-Duplex RS232 works without any modification. The
internal surge-protection.
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1-1. Features
¾Low Cost
¾Ease Install
¾Baud rate up to 115.2 Kbps.
¾15KV ESD Protection
¾Power support from RS232 or DC Jack
¾Select half duplex or full duplex
¾Low power
1-2. Specification.
¾Power input voltage: DC +5V OR USB POWER
¾Output:RS422/RS485 protocol.
¾Host connection: Standard D-Sub 9 pin male connector
¾Electromagnetic Compatibility: CE,FCC
¾Communication speed: form 110bps to 115.2Kbps auto-switching.
¾RS422/485 line protection:Against surge.
¾Distance: up to 4000ft ( 1250M ).
¾Connection type: Screw terminal for maximum AWG 12 wire.
¾Signal LED: TX, RX.
¾Power supply: standard DC adapter.
¾Power consumption: <0.2W
¾Operating environment: 0 to 60℃.
¾Storage temperature: 0 to 70℃.
¾Dimension: 55mm X 42mm X 25mm.
¾Weight: 39g.
¾Humidity: 5-95% non-condensing.
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2. SC-101 panel layout
3. SC-101 Hardware structure
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4. Install SC-101
4-1.Connect power source or use standard RS232 (TXD,RXD,DTR,DSR,CTS,RTS,GND)
Warning: only power source
Do not use external DC-Jack and screw terminal DC input simultaneously.
4-2. Connect SC-101 with Host PC.
4-3. Connect SC-485 with RS4222 or RS422/485 serial device.
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5. Loop back test
6. Terminal Resistor connection.
SC-101 does not has built-in terminal resistor, user may add external terminal resistor by following connection.
6-1. RS485
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Terminal Resistor specification.
110 ohm: If distance between both end of RS485 devices in 1.2KM .
220 ohm: If distance between both end of RS485 devices in 600M .
330 ohm: If distance between both end of RS485 devices in 300M
6-2. RS422
Terminal Resistor specification...
110 ohm: If distance between both ends of RS422 devices in 1.2KM.
220 ohm: If distance between both ends of RS422 devices in 600M.
330 ohm: If distance between both ends of RS422 devices in 300M
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