Azbil Corporation No. SS2-8114-0300 - 11 - Figure 8 Operating principle of block diagram - Input conversion block: Receives gate opening command signals of 1-5V DC under high impedance (4-20 mA DC signals are converted to voltage signals by a resistor of 250.. connected to the input terminal) and converts to the level convenient for internal processing. - Mode switching block: Monitors gate opening command signals, judges signal “OFF”, and generates drive signals according to the preset mode. - Comparative operation block: Effects comparative operation between output axis rotating angle signals (potentiometer) and signals converted by the input conversion block. - Power drive block: Issues direct/reverse rotation command output to the motor depending on comparative judgment signals received from the comparative operation block. Figure 9 Terminal connection Ordering information When ordering, please specify; 1) 2) 3) 4) 5) 6) 7) 8) Model number: HTS Nominal size × Port size Type and rating of end connections Body and trim material, necessity of hardening Type of bonnet Valve and plug characteristics Type of actuator, power supply, frequency. Valve action (direct or reverse), operation mode of input signal “OFF”. 9) 10) 11) 12) 13) 14) 15) Accessories (limit switch) Special requirement of oil free treatment, and etc. Name of flow medium Normal flow and maximum required flow Pressure of flow medium, upstream and downstream pressure at maximum and minimum, required flow Temperature and specific gravity of flow medium Viscosity of flow medium, inclusive or exclusive of slurry Regulator R/I Potentio. meter Input conversion (A/D) Mode switching Comparative operation Power drive Motor Valve opening output (4-20 mA DC) Input (4 to 20 mA DC, 1 to 5V DC) Power supply (100V AC) Operating output + - + - IN 100V AC OUT External output signal (4-20 mA DC) Power supply (100V AC, 50/60 Hz) (200V AC, 50/60 Hz) (24V AC, 50/60 Hz) External input signal (4-20 mA /1-5V DC) 6 3