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  • ATC-277 MM is a kind of multi-function serial port to fiber optic MODEM converter.
  • It is the best solution for remote terminal unit (RTU) connect to HOST or a distributed data acquisition system (SCADA) controller.
  • This product uses optical fiber as transmission medium, to improve the system transmission performance.Effectively avoid bad environment of communications equipment.Such as the lightning, surge and electromagnetic interference
  • Support “point-to-point” mode.
  • Support MM mode fiber with SC or ST interfaces
  • RS-232/422/485 3-in-1 interface
  • Extend serial communication distance
  • MM mode is 2km (ATC-277MM)
  • Serial Baud Rate:RS-232 300 to 115.2KBPS
  • RS-422/485 300 to 230.4KBPS
  • 600W lightning protection for all RS232 signal line,
  • 1000W lightning protection for all RS485 signal line
  • Small size and support DIN rail for easy installation
  • Isolation protection, reduce electrical interference
  1. Optical Fiber Port
  • Interface : SC or ST
  • Fiber requirements : 50/125μm,100/140μm,200μm.
  • Transmission distance : SM:20 km,MM:2km
  • Wavelength : SM:1310 nm,MM:850 nm
  • Coupled Power Budget : 12.1 dB
  • Point to point transmission: half-duplex and full-duplex
  1. RS-232/485/422 Port
  • Interface : DB9-DTE (Male) for RS-232.
  • 6-bit terminal connector for RS-485/422.
  • RS-232 : TXD,RXD,GND
  • RS-485 : 485+,485-
  • RS-422 : TX+,TX-,RX+,RX
  • Baud rate : 300bps ~ 250.4kbps
  • Lightning protection:RS-232 : each line 600W
  • RS-485/422 : each line 1000W
  1. Physical Specifications
  • Shell : iron (1 mm)
  • Size : 100mm × 86mm × 26 mm
  • Weight : 0.60kg(full package)
  • Operating temperature : -20°C to 70°C
  • Storage temperature : -40°C to 80°C
  • Working humidity : 5 ~ 95% RH
  • Power supply : 9-24VDC @ 250mA max.
  • Ingress Protection : IP30
  • Model no. ATC-277SM/MM

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