Siemens 6ES7157-0AD82-0XA0 SIMATIC DP/PA Coupler Ex-Version 110 mA IP20 Remote I/O Interface Module

The Siemens 6ES7157-0AD82-0XA0 is a SIMATIC DP/PA coupler, Ex version, that links a PROFIBUS DP segment to a PROFIBUS PA fieldbus segment per IEC 61158-2, supplying up to 110 mA of intrinsically safe power to as many as 31 field devices. Rated IP20 with a 24 V DC supply, it steps DP's 45.45 kbit/s down to PA's 31.25 kbit/s for Ex ia IIC connected instrumentation.

Technical Specifications

Selection Notes

The 110 mA total output to field devices and 31-device spur-line limit size this coupler for one moderately populated PA segment; a larger installation needs a second coupler or a higher-output variant. Because this is the Ex[ia] version, the PA-side terminals are intrinsically safe (Uo 15 V, Io 247 mA, Po 1.95 W for gas group IIC), so connected field devices must carry matching Ex ia ratings - a standard, non-Ex DP/PA coupler cannot substitute for this one in a hazardous-area segment.

Applications

Connecting PROFIBUS PA field instruments - pressure, level, flow, and temperature transmitters - in hazardous areas to a PROFIBUS DP master network, typically in refineries and chemical processing plants.