EL70Q is a single bus Multi-drop or RS485 (Simplex) to USB interface converter, allowing PC to be linked to 16 controllers with maximum distance of 1 KM. 
 

• Conversion circuitry: 1x Multi-drop or RS485 to 1 x USB interface conversion circuitry
• Dimensions: 78(H) x 125(W) x 30(D) mm