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The EDP300 digital positioner feature a high air capacity of 50 kg/h

(23 scfm) at 10 bar (145 psi) and is equipped with advanced

pressure-based diagnostic functions.

Why are they used?

Compliance to environmental regulations

In any production process, it is critical to ensure

stable and constant process conditions to

achieve optimum product quality and process

efficiency. Any control equipment must be capa

ble of eliminating any variations in the process

variables that could cause the process to consume

both more energy and consumables than normal,

pushing up production costs. The stability of the

downstream control loop may also be affected,

impacting on both product quantity and quality.

With the compressed air used by valve posi

tioners being around ten times more expensive

than electricity, accurate control is essential to

minimizing plant overheads as well as eliminating

potential problems in the downstream process.

The TZIDC and EDP300 series digital positioners provide flexible

and cost-effective valve management and control. Their durability

and unmatched shock and vibration immunity up to 10 g and 80 Hz

means that they are suitable for use even under harsh conditions.

The challenge – handling over 100.000 strokes a year

Most control valves in many processes will rarely

have to move, commonly enabling operators to opt

for positioners with lifetimes of less than 100.000

strokes. However, there are some applications

where valves will need to handle frequent changes

in process conditions. In such applications, where

100.000 strokes may occur in a single year alone,

there is a need for a positioner that can handle

these changes with minimal need for maintenance.

The solution – unrivalled performance performing

1.000.000 strokes

The answer is ABB’s TZIDC positioner. In a four

month trial, an ABB TZIDC positioner underwent

a customer durability test which saw it perform

1.000.000 strokes without any deterioration in

performance or fault or interruption.

Offering remote communication via 4 to 20 mA

HART, PROFIBUS PA or Foundation Fieldbus,

the TZIDC sets the standard for safe and eco

nomic control of industrial processes. Its built-in

intelligence enables it to adapt itself to any

control valve at the push of a button, while a

host of service, diagnostic and safety functions,

including fail-freeze and fail-safe action, help to

provide a high level of operational performance.

The TZIDC and EDP300 is suitable for use with

linear, part-turn, and single or double-acting actu

ators and is protected to IP65/NEMA 4X, making

it ideal for harsh environments. You can rely on

the TZIDC and EDP300 to provide the highest

levels of availability, enabling you to maximize

the profitability of your process through improved

plant uptime.

First class valve automation

ABB‘s measurement and analytical products pro

vide world-class measurement solutions for any

industry, utility or municipality. Latest innovations

deliver technological solutions to make it easier

for you to run your plant.

ABB’s measurement and analytics products are

based on common tech nology, providing a

common look and feel and method of operation.

This results in products, that are easy to configure,

easy to integrate, and easy to maintain.

ABB’s measurement and analytics product 

portfolio:

• Analytical measurement

• Flow measurement

• Pressure measurement

• Temperature measurement

• Level measurement

• Actuators and positioners

• Recorders and controllers

• Device management, Fieldbus and Wireless

• Force measurement

• Service

Reliable and accurate even under adverse conditions

Smart remote positioners

The EDP300 and TZIDC series of digital

positioners provide flexible and cost-

effective valve management and control.

They are now available as a remote

version, delivering reliable and accurate

results even under adverse conditions.

•    Position sensor and pneumatics/electronics installed

in separate housings

•    10 m (32 ft) cable length allow for high flexibility

•    Higher vibration immunity

•    excellent accessibility

•    increased protection class

•    stainless steel housing

Reliable and accurate

Using pneumatic actuators with integrated position sensor.

‘Fail-safe’ safety function

If the electric power supply fails, the positioner output 1 is

depressurized and the return spring in the pneumatic

actuator moves the valve to the safe position. In case of a

‘double-acting’ version, output 2 is additionally pressurized.

‘Fail-freeze’ function

If the electric power supply fails, the positioner Output 1

(and Output 2 if applicable) is closed and the pneumatic

actuator blocks the valve in the current position. If the

compressed air supply power fails, the positioner

depressurizes the actuator.

Use

The positioner has a built-in operating panel providing a 2

line LCD indicator and 4 operating buttons for

commissioning, configuration and monitoring during live

operation.

Alternatively, the appropriate configuration program can be

used via the available communication interface.

Communication

Communication with the TZIDC-210 occurs via PROFIBUS PA®.

Modular design

The basic model can be enhanced at any time by retrofitting

optional equipment.

Option modules can be installed for analog and digital

position feedback.

Additionally, a mechanical position indicator, proximity

switches or 24 V microswitches are available for indicating

the position independently of the mother board function.

Brief description

The TZIDC-210 is an electronically configurable positioner

with communication capabilities designed for mounting on

pneumatic linear or rotary actuators. It features a small and

compact design, a modular construction, and an excellent

cost-performance ratio.

Fully automatic determination of the control parameters and

adaptation to the positioner allow for considerable time

savings as well as optimum control behavior.

Pneumatics

An I/P module with subsequent pneumatic amplifier is used

to control the pneumatic actuator. The well-proven I/P

module proportionally converts the permanent electrical

setpoint signal from the CPU into a pneumatic signal used to

adjust a 3/3-way valve.

Dosing of the air flow for pressurizing or depressurizing the

actuator is continuously adjusted. As a result, excellent

control results are achieved. When reaching the setpoint, the

3/3-way valve is closed in center position to minimize the air

consumption.

The pneumatic system can be supplied in four versions: for

single acting and double acting actuators and each with the

‘fail-safe’ / ‘fail-freeze’ safety function.

Diagnosis parameters

The diagnostics parameters in the positioner’s operating

program provide information about the operating conditions

of the valve.

From this information the operator can derive what

maintenance work is required, and when.

Additionally, limit values can be defined for these parameters.

When they are exceeded, an alarm is reported.

So, for example, the following operating values are

determined:

• Number of movements of the final control element

• Sum of individual actuator travel events

The diagnostic parameters and limit values can be called up,

set and reset using the configuration program.

Operator panel

The integrated operating panel of the positioner has four

operating buttons which allow the device to be operated with

an open housing cover.

The following functions can be controlled via the function

keys:

• Observe live operation

• Manual intervention during live operation

• Parameterization of the device

• Fully automatic commissioning

Operations monitoring parameters

Various functions for continuous device monitoring are

implemented in the operating program for the positioner.

The following states will be detected and indicated, e.g.:

• Internal positioning time-out

• Sensor monitoring

• Backup monitoring

While automatic commissioning is in progress, the current

state is continuously indicated on the integrated LCD

indicator. Remaining messages can be retrieved via the user

interface.

The fieldbus enables users to implement enhanced

monitoring in the control system. A special window displays

the most important process variables ONLINE, e.g. the

setpoint signal (in %), the position (in %), the control

deviation (in %) as well as the status messages.

Pneumatics

An I/P module with subsequent pneumatic amplifier is used

to control the pneumatic actuator. The well-proven I/P

module proportionally converts the permanent electrical

setpoint signal from the CPU into a pneumatic signal used to

adjust a 3/3-way valve.

Dosing of the air flow for pressurizing or depressurizing the

actuator is continuously adjusted. As a result, excellent

control results are achieved. When reaching the setpoint, the

3/3-way valve is closed in center position to minimize the air

consumption.

The pneumatic system can be supplied in four versions: for

single acting and double acting actuators and each with the

‘fail-safe’ / ‘fail-freeze’ safety function.

‘Fail-safe’ safety function

If the electric power supply fails, the positioner output 1 is

depressurized and the return spring in the pneumatic

actuator moves the valve to the safe position. In case of a

‘double-acting’ version, output 2 is additionally pressurized.

Brief description

The TZIDC-220 is an electronically configurable positioner

with communication capabilities designed for mounting on

pneumatic linear or rotary actuators. It features a small and

compact design, a modular construction, and an excellent

cost-performance ratio.

Fully automatic determination of the control parameters and

adaptation to the positioner allow for considerable time

savings as well as optimum control behavior.

‘Fail-safe’ safety function

If the electric power supply fails, the positioner output 1 is

depressurized and the return spring in the pneumatic

actuator moves the valve to the safe position. In case of a

‘double-acting’ version, output 2 is additionally pressurized.

‘Fail-freeze’ function

If the electric power supply fails, the positioner Output 1

(and Output 2 if applicable) is closed and the pneumatic

actuator blocks the valve in the current position. If the

compressed air supply power fails, the positioner

depressurizes the actuator.