ASM-300-I ( RS-232 Isolated Line  Booster  )
Features & Specification 
RS-232 DB-9  Pin assignment
  • RS-232 Isolated Line Booster Converter with Isolated DC-to-DC converter
  • Meets EIA / TIA-232E specification
  • ESD protection on Tout pins (+-8KV: contact discharge  +15KV: air gap discharge) 
  • Standard RS-232 DCE (DB9-F) to DTE (DB9-M)  Interface
  • Easy to install , Plug & Play / 5V Power required
  • Working type:   RS-232/F (DCE) =>TTL (Booster) =>RS-232/M (DTE) 
  • Fully compliant with RS-232 Spec.
  • Compact size / With two LED appeared power / TXD / RXD 
  • Easy cheek data transfer & receiver
  • RS-232 DTE connecter : DB9 - M  / RS-232 DCE connecter : DB9 - F
  • Line extender 45M / Data rate : Up to 200 K bps   
  • With TTL Single Booster / Stander RS-232 I/O
  • Housing : Plastic / Weight : 55g

Dimensions (L*W*H) : 45 * 35 * 21 ( mm )    body

Signal Name / Mode DB - 9F - DCE DB - 9M - DTE
FG (Frame Ground) FG FG-I
CD (Carrier Detect) 1-DCD 1-DCD-I
RD (Receive Data) 2-RXD 2-RXD-I
TD (Transmit Data) 3-TXD 3-TXD-I
DTR (Data Terminal Ready) 4-DTR 4-DTR-I
SG (Signal Ground) 5-Host SG 5-Device SG-I
DSR (Data Set Ready) 6-DSR 6-DSR-I
RTS (Request To Send) 7-RTS 7-RTS-I
CTS (Clear To Send) 8-CTS 8-CTS-I
RI (Ring Indicator) 9-RI 9-RI-I