HD22005-3A HD22005-3 Emerson DC switching power supply

Description

Position control is affected by a shutdown input, intended to be used in emergency

or abnormal situations. It is a HD22005-3A standard 24 volt digital input circuit.

Typically, the Valve Positioner will rapidly drive the valve to the 0% position when

the shutdown input is energized. The Valve Positioner then transfers to local

manual mode for the purpose of requiring the Controller to track position feedback.

Once the Controller tracks, the Valve Positioner HD22005-3A will transfer back to normal mode.

The state of the shutdown input is available to the Controller via a Valve Positioner

module Ovation register.

A control bit in the shared memory can cause the Valve Positioner to ignore the

shutdown input while in normal mode. This is used when the customer prefers trip

logic in the Controller, not on the card. However, in local-manual mode, the Valve

Positioner will drive the valve shut when the shutdown input is energized,

regardless of the state, or previous state, of the control bit.

One important feature of the servo valve is an adjustable mechanical bias

mechanism. This mechanism creates a slight deflflection in the valve spool so that a

small amount of hydraulic flfluid HD22005-3A can escape the actuator and close the valve.

Therefore, if there is no voltage applied to the servo valve, the actuator will slowly

move toward the closed position. This deflflection is typically overcome by -200

millivolts, so that when the valve is positioned and steady, this small voltage is seen

on the servo valve.

The servo valve has two voltage coils, either of which can deflflect the spool when

excited. The combination of these features provides a redundancy feature that

protects against broken wires or shorted coils, the ability to be diagnosed, and a

predictable shutdown mechanism in the event the fifirmware diagnoses a catastrophic

error and executes a shutdown, or an error mode occurs that allows a hardware

watchdog timer to expire and de-power the Electronics module’s FVP fifield card.

The Valve Positioner continuously runs diagnostics to ensure that the circuit is

operating properly. Certain conditions can cause the Valve Positioner to “dive,”

essentially removing the output signal HD22005-3A and allowing the valve to drift shut.

As a general rule, the card will view error conditions on start up as “no-go” or fatal

errors. This means that the Valve Positioner will not generate an output to the valve.

See the following error descriptions for specififics.

Why are the prices of many products of our company more competitive?
(1) Source purchase to reduce the price difference in the intermediate phase
(2) Stable channel and more guaranteed supply
Lead time problem
(1) For the spot products in stock, the delivery can be arranged on the same day after the contract payment is signed
(2) Order products and deliver according to the quoted delivery date
Xiamen Xiongba adheres to the enterprise philosophy of “improving the value of spare parts supply chain”,
For the simple purchase procedure of spare parts, ensure that they are delivered to the site in a timely manner, and help users reduce the risk of downtime caused by the shortage of spare parts
The emergency spare parts support service is complete, and the user can customize the spare parts. The quality of the spare parts is reliable. All the spare parts provided enjoy a one-year super long warranty
Spot stock, fast response, reduce user capital investment, improve spare parts utilization, spare parts replacement!

Details: If you need urgent delivery orders, please feel free to contact us, and we will try our best to meet your needs.
Price problem: If you find that other suppliers offer cheaper prices for the same product, we are also willing to provide you with reference prices and give you further discounts.
Contact us:+86 181 0693 7731
Mail: 2872270648@qq.com
Contact: Chen