5.3 Wiring plan87 11103 95421 6 121718 141522 1620212324 19 132930 262734 2832333536 31 25+- L+N-+ + + + + --5 4 3691 7 8210 11 12 1314OKESCon1 2 3 4 5 6Fig. 4: Terminal assignment with two-wire sensor1 Operating relay 12 Operating relay 23 Operating relay 34 Operating relay 45 Operating relay 56 Operating relay 67 Current output8 Operating voltage of the signal conditioning instrument9 Measurement data input with sensor supply (active input)10 Connection for HART modem for sensor parameter adjustment11 Measurement data input (passive input), not with Ex-ia version12 Digital input 1 … 413 Common ground for digital input 1 … 414 4 … 20 mA/HART sensor (two-wire version)Wiring plan for two-wiresensor14 VEGAMET 391 • 4 … 20 mA/HART signal conditioning instrument5 Connecting to power supply36032-EN-091116