RS232-RS422/485光电隔离转换器SK485-III
一、产品介绍：
SK485-III是一款加强型高性能和多功能的RS-232到RS-485/RS-422接口转换器，提供RS-232信号到RS-485信号或RS-232信号到RS-422信号间的相互转换。该产品传输速率高达115.200Kbps，采用外接电源供电，光电隔离2500伏电压,并且内设2000W浪涌防雷，双重保护安全更可靠。非常适合户外及恶劣的环境中应用。在RS-485和RS-422网络间进行选择非常方便,只需轻轻拔动RS-485或RS-422开关即可，并且该产品有DTE、DCE选择开关，方便不同的用户环境对不网络进行选择。
二、性能指标
★ 接兼容EIA/TIA、RS-232C和RS-485、RS-422标准
★ 完成RS232到RS485/RS422双向信号转换器    
★ 支持点对点和点对多点通讯最多可高达32或128节点
★ 隔离电压：2500伏、内设2000W浪涌保护
★ 网络速率：1.2Kbps – 115.2Kbps          
★ 传输距离：0 – 1.2公里（115200 - 1200bps）
★ 工作方式：异步全双工或异步半双工
★ 流量控制：自动帧测RTS或CTS信号
★ 开关设置：DTE、DCT可选，RS-485、RS-422可选
★ 电源供电：AC，5 –15V，300mA
★ 外型尺寸：75mm × 54mm × 21mm
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RS-232 to RS-422/485 Isolation Interface Converter

SK485-III   RS232-RS485/422
General introduction:  
Thank you for your purchase of this Sakertele Electronics product, sk485-III Isolation Interface Converter is compatible with RS-232C, RS-422, RS-485 standards and capable of converting single signal end RS-232 signa into RS-422 or RS-485of balanced signal.
Product features:
1. Interface feature: interface is compatible with EIA/TIA RS-232C, RS-422/485 standard
2. Electric interface: RS-232C interface DB25 hole connector RS-422/485 interface 4-bit terminal
3.Transmission media: twisted-pair cable or shielded cable
4.Working mode: asynchronous half(rs-485) or full duplex(rs-422)
5. Signal indication: three signal indication lights indicate TD, RD and PWR
6.Power supply: serial port electricity stealing at RS-232 end. External power supply connecting at RS-422/485 end
7. Isolation: isolation voltage 2500VRMS 500VDC sequence special built-in             lightning protection IC
8.Transmission speed: 115200 BPS to 1.5KM 38400BPS to 2.4KM. 
9.Size: 75mm × 54mm × 21mm
10.Working environment: 5% to 95% relative humidity
3.0 Application fields: 
 Point to point, point to multi-point communication
 Industrial distribution system, industrial control automation
Road traffic control automation
Closed circuit monitoring
 Security protection system
 Intelligent card, check on work attendance gate safety system
 
This product has been thoroughly inspected and tested and is warranted for One Year parts and labor. If any questions or problems arise during installation or use of this product, please do not hesitate to contact Shenzhen sakertele electronics technology co.,ltd Technical Supporte., 
 
Shenzhen Leidun Electric Appliance Co., Ltd
phone：     fax：     
：+86  
ADRESS: 6017#  shennan road futian shenzhen ,china