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Industrial RS-232/422/485 To Dual Fiber Ports Converter, 2.5KV Isolation, Multi-Mode 2KM, SC Connector (EOT: -40??C ~ 75??C)

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normal delivery is 2 weeks from date of order. We will advise you within 48 hours of receiving your order the estimated delivery date.
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 Product Description


The Antaira STF-500C Series are Industrial Grade Design Serial-to-Fiber Media Converters that provide rugged solution to extend asynchronous RS-232, or RS-422/485 serial data transmissions over a distance of up to 2Km in Multimode fiber, or up to 30Km in Single mode fiber.

The converter is capable of selecting interface modes for connection to RS-232 (3 or 5 wire), RS-485 (2 or 4 wire, half or full duplex) or RS-422 (4 wire, full duplex). With the High Performance design, the STF-500C series provide:

High Data Protection:

  • Secures Asynchronous Serial Data transmissions over EMI resistant fiber at speeds up to 1024Kbps
  • Built-in RS-485 auto detection feature, 8KV ESD Protection and 2.5KV Isolation for Serial data transmission protection; and 10 positions Rotary Switch for RS-422/485 Pull high/low feature.

Secure Serial Network:

  • Supports Point-to-Point, Daisy Chain, and Half Duplex Ring Topology Fiber Network
  • STF-502C series supports Point-to-Point, Single Duplex Fiber connection (without Protection), or Dual Duplex Fiber connection (with Fiber Protection) - Redundancy Serial Fiber Network with Dual Fiber connections

Easy Monitoring and Maintenance:

  • Built-in Dual alarm relay contacts and Dual redundant DC power inputs
  • Front LED indicators for any Power, TD/RD, or Fiber Link failure monitoring

The STF-500C Series is a high performance & protection solutions for critical applications, such as

  • High Serial Isolation Protection for Outdoor Equipment data extension in ITS Signaling, or VMS;
  • Dual Fiber Ring Redundancy Serial Network in Firm Alarm Panels control;
  • EMI resistant for IEDs data transmission in Substation Automation;
  • Industrial Control in Process Control Automation, such as WWTP and Oil/Gas/Mining.



  • Supports Point-to-Point, Daisy Chain or Ring Connection
  • Supports RS-232, RS422/485 (2/4 Wire) Transmission to Single or Dual Fiber Connections
  • Enhanced Serial Baud Rate up to 1024Kbps
  • Supports SC Multi-Mode in 2Km
  • 2.5KV Isolation Protection for Serial Signal
  • Supports Relay Output for Power or Link Failure Warning
  • 10 Position Rotary Switch for RS-422/485 Pull High/Low Transmission
  • Hardened housing with IP30 protection
  • Fan-less and Din-Rail design for harsh industrial environment
  • Redundant Dual Power Inputs (12 ~ 48VDC)
  • Operating Temperature Range: -40~75°C
  • 5-Year Warranty



Baud Rate 50 up to 1024Kbps (RS-422/485)
230.4Kbps (RS-232-CH1)
115.2Kbps (RS-232-CH2)
Cable Multi-Mode: 50/125um, 62.5/125um
Casing Enclosure Metal, IP30 Protection
Certifications FCC, CE, UL (Pending)
Dimensions 106 x 39 x 142 mm ( 4.72 x 1.54 x 5.59 in)
EMI FCC Part15, CISPR (EN55022) Class A
EMS EN61000-4-2 (ESD) Level 3, Criteria B
EN61000-4-3 (RS) Level 3, Criteria A
EN61000-4-4 (EFT) Level 3, Criteria A
EN61000-4-5 (Surge) Level 3, Criteria B
EN61000-4-6 (CS) Level 3, Criteria A
Fiber Port 2 Fiber Ports
Fiber Type SC
Green RoHS Compliant
Humidity 5 ~ 95%
Installation DIN-Rail Mounting, and Wall Mounting Kits Included
Isolation 2.5KV
MTBF 797,101 Hours
Operating Temperature -40°C ~ 75°C (-40 ~ 167°F)
Power Consumption 5W
Power Input 12, 24, 48 VDC (9.6 ~ 58VDC absolute)
Power Input Connector Dual Power Inputs with Alarm Relay Contact
Pull High/Low Selected by 10 Position Rotary Switches
Reverse Polarity Power Protection Reverse Polarity Protection
Rx Sensitivity Multi-Mode: -31 dBm
Serial Connector RS-232 (DB9 Female)
RS-422-4w (Terminal Block)
RS-485-2w, or 4w (Terminal Block)
Stability Testing Shock: IEC60068-2-27
Free Fall: IEC60068-2-32
Vibration: IEC60068-2-6
Storage Temperature -40°C ~ 85°C (-40°F ~ 185°F)
Transmission Distance Multi-Mode: 2km
Tx Power Multi-Mode: -14 ~ -20 dBm
Warranty 5-Year Warranty
Wave length Multi-Mode in 1310nm
Weight 720g



  • CD Manual/Software
  • Quick Start Guide
  • Wall Mounting Kit



icon-pdf2.gif Product Datasheet

icon-pdf2.gif Product Manual

icon-pdf2.gif Quick Installation Guide

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