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I. Product Overview
YT-5202 is a fiber optic serial data transceiver that can support both 1-way RS232 and 2-way RS485 (or 1-way RS422) interfaces. It is the best choice for connecting a remote terminal unit (RTU) to a host (HOST) or a distributed data acquisition system (SCADA) controller. It supports multiple Asynchronous communication protocols such as RS-232 and RS-485, and can simultaneously use one RS-232, two RS-485 interfaces or one RS422 interface. It supports 2-wire (half duplex) RS-485 and 3-wire RS232 communication. Supports multiple fiber optic connection methods between asynchronous serial ports, and supports devices with two asynchronous serial ports for full duplex (RS232) or half duplex (RS485) communication through fiber optic. The communication distance can reach up to 2 kilometers for multimode and 20 kilometers for single mode, with a maximum transmission rate of 115.2 KBPS for RS-232 signals and 460 KBPS for RS-485 signals. Interfaces with different electrical standards can be mixed, RS-232 devices can be used to connect RS-485/422 devices, replacing RS-232 to RS-485/422 interface converters or photoelectric isolators.

YT-5202 can support synchronous sending and receiving of data, and has an automatic enabling control circuit for data flow. A pure hardware fiber optic transceiver module designed specifically for low-speed serial data transmission and reception in industrial control can achieve almost zero delay in data transmission and reception, greatly improving the compatibility of equipment control software.

II. Product performance
1. Adopt pure hardware Optical module, with zero delay for signal transmission
2. Supports single mode fiber/multimode fiber, with optional fiber ports FC/SC/ST, default to single mode and FC ports
3. Supports RS-232/RS-485/422 interfaces
4. High data transmission rate, adaptive Baud, point-to-point transmission, up to 460Kbps
5. Long transmission distance: 20 kilometers for single mode fiber and 5 kilometers for multimode fiber
6. Working temperature: -40 ° C to+85 ° C, relative humidity: 5% to 95%
7. Working wavelength: 1310nm (multimode), 1310nm 1550m (single mode)
8. Electrical interface: RS-232/485/422 output is connected through wiring terminals
9. RS-22 interface characteristics: standard RS-232 three-wire interface
10. Input voltage DC9-30V, 200mA
11. RS-485 interface with 1200W TVS lightning protection per channel
12. Product size: 113 * 5 5 * 25MM
III. Product List
1. YT-5202 fiber optic to 2-way RS485 transceiver 1
2. 1 12V/500mA DC power supply
3. 1 product manual

System parameters
Interface: Compliant with EIA RS-232, RS-485 standards
RS-232 signals: TX, RX, GND
RS-485 signal: T/R+, T/R-
RS-422 signals: T/R+, T/R -, R+, R-
Working mode: Supports asynchronous transmission, point-to-point or multipoint, 2-wire half duplex
Baud: 300 ～ 115.2Kbps, automatic detection of serial port signal rate
Direction control: automatic discrimination and control of data transmission direction
Transmission distance: multimode 2km, single mode 20km
Lightning protection: RS-485/422 output provides 1500W of lightning protection
Indicator light: Equipped with power and data flow indicators, which can be used to determine the type of fault.
Static electricity protection: 15KV static electricity protection
Work environment
Working temperature: -40 ℃ to+85 ℃
Humidity: Relative humidity 5% to 95%
Working power supply
Input power supply: 12V external DC power supply (standard 220V to DC12V power supply)
Power consumption: Static power consumption within 100mA, average dynamic power consumption within 200mA
Mechanical structure
long × wide × Height: 119mmX85mmX26mm
Shell: aluminum shell
Color: Silver
Weight: 150g