a116_00General brochure.pdf

Electronic Equipment

for Control

Intelligent Command

A116/00

SUMMARY

Intelligent actuator

INTELLI+

Non-intrusive commissioning

Analysis and preventive maintenance

Electrical connection

Configuration

Control by fieldbus

Intelligent actuator

echnology is evolving toward more intelligent systems that offer more capabilities, better security and a higher level

of user friendliness.

The integrated functions of the actuator efficiently address system requirements by setting and controlling the valve posi-

tion, as well as controlling the transmitted torque, in order to optimise the customers process.

A standard actuator includes travel and torque limit switches used to stop the motor at the correct position or when the

torque setting is reached.

A basic intelligent actuator can be archived by adding locally an on-board microprocessor to a conventional actuator.

However, processing capabilities will be limited due to the low level of information communicated.

Only a specific instrumentation and an efficient local microprocessor will allow the full capacity of an intelligent actuator

to be achieved.

Highly accurate and rapid measurements allow not only for the control of the actuator, but also of the driven valve.

The microprocessor guarantees dynamic control of the actuator by testing and validating its components and parameters

in real time while storing and transmitting to the system, the requested information which will allow the setting of a pre-

ventive maintenance for the actuator and its related valve.

Multi-wired connections allow the intelligent actuator to exchange information with the PLC: each bit of data needs a wire

to relay the information.

The fieldbus communication of an intelligent actuator, with a PLC, reduces the number of wires to two, no matter the vol-

ume of information and allows the actuator to take full advantage of the capacities offered.

INTELLI+ is the new concept and system solution now available from BERNARD. After analyzing user's needs

and taking part in several French and European research programs about intelligent actuators, (including

ESPRIT projects : PRIAM and DIAS), this concept has become reality.

It is based on:

n ABSOLUTE SENSORS: MORE RELIABILITY

INTELLI + is the first intelligent actuator to include true absolute sensors.

Reliable measurement:

- Based on mechanical measurement and microprocessor management.

Precise and reliable reading:

- to allow a precise reading, the information is numerized on a specific number of bits.

- reading information is contactless. It is ensured by a system of infra-red transmitters and receptors managed by the

microprocessor.

- a back-up battery is not necessary to maintain system measurements.

Position :

- an absolute encoder, mechanically driven by the actuator shaft, mechanically knows the position of up to 914 operating

turns in standard configuration, coded on 15 bits.

Torque :

A dynamometric system, set at the factory, indicates the actual torque of the actuator through spring compression, coded

on 5 bits.

n PROGRAMMABLE MICROPROCESSOR: MORE POSSIBILITIES

Thanks to a precise algorithm, the microprocessor guarantees control of the actuator and valve parameters, the position

and torque measurement, fault treatment (with different fault tolerance levels), while maintaining the actuator permanently

under the user's control, and giving him the information in changes of performance and capacity functions.

n IMPORTANT MEMORY CAPACITY: MORE INFORMATION

The INTELLI+ is equipped with a special memory capacity EEPROM, which totally secures all the parameter settings and

numerous process data records, such as valve torque values recorded during the last operations, that can be used for

valve predictive maintenance.

This memory does not require any type of battery backup to maintain its data.

COMMUNICATION

Local

Multiwired

Fieldbus

I.R.

ESD

n MULTIPLE COMMUNICATION POSSIBILITIES

The INTELLI+ offers many communication possibilities which does not require opening of any covers:

remote control:

wire by wire,

by fieldbus (interface module optional),

locally:

n through a display and local control buttons,

n through an infra-red link with a computer.

Remote control:

n WIRE BY WIRE COMMANDS

Remote control can be achieved using a 1 to 250 V external voltage supply or by dry contacts, which utilizes the actua-

tors internal 24 VDC voltage supply.

This control can be configured as a pulse or self-holding remote command during the operation.

Inputs on the board are completely isolated by opto-isolators.

It is also possible to control the actuator with an unique external contact, using one of the two functions "Priority to open"

or "Priority to close".

n PROGRAMMABLE AUXILIARY COMMANDS

In addition to OPEN / CLOSE / STOP commands, INTELLI + enables to you to choose 2 Extra commands among 8 pos-

sible (see page 12).

n EMERGENCY CONTROL (ESD)

ESD (Emergency Shut Down) is a remote emergency control signal with priority over all other controls. Depending upon

the valve operation, ESD can be configured to an Open, Close or Stop command. To increase the availability of the actu-

ator in extreme conditions, ESD can also override the motor thermal sensor and ignore any possible torque overload that

may be previously set.

n REMOTE SIGNALLING

Remote indication is done through 4 bi-stable relays, with the possibility of 23 available operating options to select from

(see page 12).

Note: voltage free relays maintain their positions without battery backup.

An additional card (optional) with 3 mono-stable relays allows for reporting of 3 more remote operating values.

n FAULT MONITORING RELAY

One reversing relay indicates the actuator is unavailable.

The fault monitoring relay reports 5 operating values as a standard. This relay can be set-up according to a list of avail-

able options (see page 13).

Note: the monitoring relay is always energized and drops out only in event of a fault.

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