Transcript
SC-101
User’s Manual
RS232 to RS422/485 Converter
Page 1 of 9.
KSH International CO., LTD
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.
1-1. Features
Low Cost
Ease Install
Baud rate up to 115.2 Kbps.
15KV ESD Protection
Power support from RS-232 port or DC Jack
Select half duplex or full duplex
Low power
1-2. Specification
RS-232: Connector: Male DB9 Signals: TxD, RxD, GND Loop back: RTS to CTS is shorted; DTR to DSR and DCD is shorted Baud Rate: 300 bps to 115.2 Kbps ESD Protect: 15 KV
RS-422/485: Connector: Terminal RS-422 Signals: TxD+, TxD-, RxD+, RxD- (Surge Protect) RS-485 Signals: Data+, Data- (Surge Protect) Mode: 4-wire RS-422, 2-wire RS-485 (Select RS-422 or RS-485 by DIP Switch) Pull High/Low: 1K/1K Ohm
COM Port Power: Input Power: RS-232 Port Power, TxD, RTS, DTR
External Power Adapter: Power Protect: YES Power: 5~7V DC Power consumption: 20 mA @ 5V DC (termination disabled)
Signal LED: Tx, Rx
Distance: up to 4000 feet (1250 M)
Dimension: 55 x 40 x 25 mm (W x D x H)
Weight: 35 gm
Page 2 of 9.
KSH International CO., LTD
Environment Operating Temperature: 0~60℃ Storage Temperature: -20 to 85℃ Humidity: 5~95 % RH
Regulatory Approval: CE, FCC, RoHS
SC-101 DC Power Input Serial Port RS-422/485
Serial Port RS-232
LED Indicators
DIP Switch Selectable
Page 3 of 9.
KSH International CO., LTD
2. SC-101 panel layout
3. SC-101 Hardware structure
Page 4 of 9.
KSH International CO., LTD
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-101 with RS4222 or RS422/485 serial device.
Page 5 of 9.
KSH International CO., LTD
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
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
Page 6 of 9.
KSH International CO., LTD
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
7. Wiring Diagram 1-1. Point To Point: RS-422 Full-duplex (4 wires) DIP switch please select “FULL”.
1-2. Specification
Page 7 of 9.
KSH International CO., LTD
1-2. Point To Point: RS-485 Full-duplex (2 wires) DIP switch please select “HALF”.
1-2. Specification
1-3. Multidrop: RS-422 Full-duplex (4 wires) DIP switch please select “FULL”.
Page 8 of 9.
KSH International CO., LTD
1-4. Multidrop: RS-485 Full-duplex (2 wires) DIP switch please select “HALF”.
Page 9 of 9.
KSH International CO., LTD
