Description
Perle PSI-MOS-RS485W2/FO 850 T Transceiver/Media Converter – 2 x ST Ports – DuplexST Port – Multi-mode – Rail-mountable RS485 TO 850NM DUAL FIBER 24VDC
For applications where redundancy is required
the PSI-MOS-RS485W2/FO 850 T can be used to transmit data from RS485 2-wire devices out over two fiber optic cables. By transmitting serial data over optical fiber
these serial to fiber converters provide an economical path to extend the reach of RS485 devices. The serial data input is transmitted out both fiber ports to different locations or back-up systems.
All popular protocols with 10/11-bit UART data format and NRZ data coding are supported
such as:
- Modbus ASCII / MODBUS RTU
- SUCONET K
- S-BUS
- DH-485
and more…
Expandable Serial to Fiber Network infrastructures
Up to ten (10) Serial to Fiber Converters can be grouped together using the TBUS DIN Rail bus system for voltage and data. This allows the serial converter to operate in additional network topology environments:
- as a star coupler
taking the serial data input signal and distributing it to up to 20 Fiber optic output ports - linear structure can be used to network several RS485 devices
- linear and star structures can be cascaded to create complex tree structures
Long Distance Serial Data Transmission over Fiber
With the FO 850 T Serial to Fiber Converter you can extend your serial data transmission up to 4.2km (2.6 miles). Therefore
any two pieces of asynchronous serial equipment
located miles apart
can communicate at half duplex over fiber optic cable at rates up to 500 kbps.
EMI
RFI and Transient Surge Immunity
Another advantage of the FO 850 T fiber optic transmission system is the electrically isolated connection of devices. Electromagnetic interference (EMI) is a common phenomenon in typical environments like industrial plants
warehouses and factory floors. This interference can cause corruption of data over RS485 or copper-based Ethernet links. Data transmitted over fiber optic cable however is completely immune to this type of noise
thus preventing the negative effects of voltage equalization currents and electromagnetic interference on the data cables. A Serial to Fiber Media Converter therefore enables you to inter-connect your serial devices over fiber ensuring optimal data transmission
increased availability of the system
and improved network design flexibility for point-to-point connections and star structures.
Flexible Fiber Optic Connections
The FO 850 T operates at 850 nm wavelength
using a separate LED emitter and photo-detector on ST type connectors. Almost any multimode glass fiber size can be used including 50/125 m
62.5/125 m
and 200/230 m.
Power Budget Considerations
Calculating the power budget is critically important with planning the fiber optic link. The optical power budget is the amount of light required to transmit data successfully over distance through a fiber-optic connection. The amount of light energy available within the setup will dictate the length of the fiber optic cable run between serial media converters within the network. Optical power budgets are critical to help businesses avoid signal distortion. To learn how to calculate optical power budget read our technical note. Transmit and receive dBm can be found in the Hardware specifications.
Product Type:Transceiver/Media Converter
Maximum Distance Supported:2.61 Mile
Power Source:Power Supply
Form Factor:Rail-mountable
USB:No
DVI:No
Network (RJ-45):No
Number of ST Ports:2
Media Type Supported:Optical Fiber
Fiber Mode Supported:Multi-mode
Total Number of Ports:3
ST Port Type:Duplex
Manufacturer Part Number:27083264
Manufacturer Website Address:http://www.perle.com
Packaged Quantity:1
Manufacturer:Perle Systems
Inc
Product Model:PSI-MOS-RS485W2/FO 850 T
Product Name:PSI-MOS-RS485W2/FO 850 T Transceiver/Media Converter
Management Port:No
Fiber Optic Cable Standard:50/125 µm|62.5/125 µm
Fiber Optic Wavelength:850 nm
Package Contents:
Country of Origin:Germany
Environmentally Friendly:Yes
Environmental Certification:RoHS|China RoHS|REACH
Weight (Approximate):7.41 oz
Height:3.9″
Width:1.4″
Depth:4.1″
