1 Pair 1 Channel Directional RS422 Interface Asynchronous Fiber MODEM SM Simplex FC 20KMDescription:
A and B are used in pairs. Single-mode single-fiber 20 km FC interface wavelength: 1310 nm/1550 nm to transmit 1-way offerirectional 422 data or 2-way offerirectional RS485 data, SC/ST port is optional
Industrial RS-485/RS-422 Optical Fiber MODEML RS-485/422 can support two RS485 or one RS422 at the same time.
Note: If the equipment is single-fiber configuration, it will be divided into A and B. Only A corresponds to B can normal communication. A-A or B-B can not synchronize the optical fiber signal.
I. Concept
RS-485/RS-422 interface optical fiber MODEM is the best choice to connect remote terminal unit (RTU) to host (HOST) or distributed data acquisition system (SCADA) controller. The product uses optical fiber as transmission medium.
It improves the transmission performance of the system and effectively avoids the threat of lightning, surge and electromagnetic interference to communication equipment in harsh environment.
II. Functions and Characteristics
A) Support RS-485/RS-422 interface, asynchronous transmission, point-to-point application, speed greater than 500 Kbps;B) Support 5V DC power inputC) RS-485/422 supports 32 nodes (128 customizable nodes)D) ESD protection of +/-15KV (human model), +/-8KV contact dischargeE) Self-adapting single-mode and multi-mode fibers without distinctionF) Working wavelength; 1310 nm/1550 NMG) Automatic detection of signal rate, zero delay automatic rotationH) Can be matched with 2U/14 slot slot card type chassis for centralized use
III. Performance parameters
Interface; compatible with EIARS-485, RS-422 standardsTransmission rate; 0-500 Kbps (RS485/422)Transmission distance; Optical port: multi-mode 2KM, single-mode 20-120 KMPort: RS485/422-1000mOptical fiber interface; FC/SC/ST optional, default SCWorking environment; - 20 C to 75 C
IV. Appearance Instructions
Interface form; 5-bit terminalLength * width * height; 100mm * 69mm * 22mmA case; an iron case.Color; computer whiteWeight; 230g
V. Pin Definition
RS-485/RS422:RS-422 interfaceR+(1)-RS-422 Receiving PositiveR-(2)-RS-422 Receives NegativeGND (3) - Signal groundT+(4) - RS-422 Sends PositiveT-(5) - RS-422 Sends NegativeRS-485-1 interfaceA1(1)-RS-485 Signal PositiveB1(2) --RS-485 signal negativeRS-485-2 interfaceA2(4)-RS-485 Signal PositiveNegative B2(5) --RS-485 signalOptical Fiber InterfaceRX-Optical Fiber InputTX-Fiber Output
VI. Illustration of Indicators
Power; power indicationRX; Optical Fiber Signal Synchronization, Receiving Optical Signal at Frequent BrightD1: Data signal lamp, which flickers regularly when sending and receiving dataD2: Data signal lamp, which flickers regularly when sending and receiving data

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