Cheap And Discounts Taidacent 8-Channel Analog Input Data Acquisition Module 4-20mA to RS485 Modbus Converter 8 Output RS485 Data Acquisition Module Wholesale. Buy Directly From Merchant Shenzhen Taida Century Company Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.