Azbil Corporation No. SS2-AVP772-0100 3) Case 3 (S..art Valve Positioner with ESD fun..tion.. 3-1) System Configuration without Output Signals (Model AVP 782) ..ystem configuration ...... Model AVP 782. * BPCS AO DO Control Valve 0-20 mA DC Emergency ..hut ..own ..ignal (Power Switch: ON/OFF) (Emergency ..hut ..own ..ignal / power supply) *: Basic Process Control system HART Host Figure 14. System Configuration ...... Model AVP 782 Used as ESD Device 3-2) System Configuration with Analog Output (Model AVP 781) Model AVP 781 has a function .......................................... the valve's position. This signal .......................... burnout if abnormalities are detected with the self diagnosis (during serious failures) or PST. To output the travel signal to the host monitoring device using analog values, configure the system with ............ transmission. Usually, the output of 0% position will be 4 mA, and the output of 100% position will be 20 mA. With this system configuration, the analog signal from the instrument is directly outputted to the host monitoring system. ..ystem configuration ...... Model AVP 781. AI Control Valve BPCS AO DO 0-20 mA DC (Power Switch: ON/OFF) Power supply Analog Signal 4-20 mA DC (Opening signal or self diagnosis (failure) / PST abnormality) 250 Ω Resistance *1 24 V DC Power Supply *1 HART Host Note: the external load resistance is the sum of the BPCS's input resistance and ......................................................................... ....................................................................................ystem Configuration ...... Model AVP 781 Used as ESD Device *1: ..lease reference Figure 1 for the details regarding the power supply and resistance. 11 7 3