ND9106HN Metso

ND9106HN Metso Programmable controller

Brand：Metso Model number：ND9106HN

Country of origin: Finland Product weight：0.55kg

HS code：8517623990

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Advanced self-diagnostics guarantees that all measurements operate correctly. Failure of one measurement does

not cause the valve to fail if the input signal and position

measurements are operating correctly. After connections of

electric signal and pneumatic supply the micro controller

(μC) reads the input signal, position sensor (α), pressure

sensors (Ps, P1, P2) and spool position sensor (SPS). A difference between input signal and position sensor (α) measurement is detected by the control algorithm inside the μC.

The μC calculates a new value for prestage (PR) coil current

based on the information from the input signal and from

the sensors. Changed current to the PR changes the pilot

pressure to the spool valve. Reduced pilot pressure moves

the spool and the actuator pressures change accordingly.

The spool opens the flow to the driving side of the double

diaphragm actuator and opens the flow out from the other

side of the actuator. The increasing pressure will move the

diaphragm piston. The actuator and feedback shaft rotate

clockwise. The position sensor (α) measures the rotation for

the μC. The μC using control algorithm modulates the PRcurrent from the steady state value until a new position of

the actuator according to the input signal is reached.

Connect the conductors to the terminal strip as shown in

Fig. 9. It is recommended that the earthing of the input

cable shield be carried out from the DCS end only.

The position transmitter is connected to 2-pole terminal PT

as shown in Fig. 9. The position transmitter needs an external power supply. The ND9000H / ND7000H and the position transmitter circuits are galvanically isolated and

withstand a 600 V AC voltage.

TIU 6 A413110 Metso

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