PRODUCTS > RS-232 to RS-485 > SER-4485-SI-M


 Products Manual


SER-4485-SI-M - 4-Port RS232/485 to RS-485 Hub/Splitter/Repeater with Metal Case and Optical Isolation


  • Converts an RS-232/485 input port to four RS-485 output ports
  • 3000V DC optical isolation for all signals
  • SECC metal chassis with DIN rail bracket
  • LEDs indicate power, TxD, RxD and error for easy port monitoring and diagnosis
  • Automatic transmit and receive control
  • Failure warning for reversed connection and incorrect signals
  • Protected circuit isolates ports with errors to avoid interference to other ports
  • Reverse polarity protection for power input
  • Serial port protected with surge protection of 15kV
  • High speed serial port with baud rate up to 230.4kbps
  • Supports all operating systems


Serial Interface
Input 1 RS-232/RS-485
Output 4 RS-485
Connector Input: 6-pin terminal block
Output: 10-pin terminal block
Max. Speed 230.4kbps for transmit & receive
Input Signals RS-232: Data+, Data-
RS-485: TxD, RxD, GND
Output Signals Data+, Data-
Protection 15kV ESD protection for all signals
3000V DC optical isolation for all signals
Serial Communication Parameters
Data Bits 5, 6, 7, 8
Parity None, odd, even, mark, space
Stop Bit 1, 1.5, 2
Flow Control Hardware (RTS, CTS), XON/XOFF
Power Input DC 12V, 1A external power adapter
Casing SECC metal chassis with DIN rail bracket
Operating Temperature 0°C to 55°C (32°F to 131°F)
Storage Temperature -20°C to 75°C (-4°F to 167°F)
Operating Humidity 5% to 95% RH
Safety Approvals CE, FCC