Rockwell-automation T7470A ICS Regent+Plus Analog Output Modules Manual de usuario descargar pdf (Pagina 11)

Analog Output Modules

(T7470A)

7025

Mar

control logic, you maintain the full resolution of the analog

output (1 part in 4096) and have a convenient engin

eering

range that represents 0.00 to 100.00% (the two decimal places

are implied).

Maintenance

There are no user replaceable parts inside the analog output

module. Re

calibration is recommended once per year, in

order to maintain the rated accuracy of the analog output

signals over an extended period of time. The following

procedure describes the equipment and steps necessary to

calibrate the analog output module.

Calibration Procedure

Equipment Required

A 5½

digit voltme

ter.

Eight 250 ohm, 0.005%, 5 ppm/

C resistors to convert the

eight output signals from a current to a voltage.

Potentiometer adjustment tool.

Phillips screwdriver

I/O module extender, catalog number T7322.

PC running the

INTERPRET

software, used to force the

analog output channels to the specific values for

calibra

tion.

Calibration Preparation

The module must be calibrated while connected to an I/O

chassis of an operational Regent system.

During calibration, the analog output module will be

disconnected from the actual controlled field devices.

Appropriate precautions should be taken to ensure that the

disconnection of the control signals does not pose a safety risk

to plant personnel or process equipment.

There are Offset and Gain potentiometers for each analog

output channel. These potentiometers are l

ocated on a circuit

board inside the module's protective clamshell housing (see

Important!

1 2 ... 6 7 8 9 10 11 12 13 14 15 16

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Rockwell-automation T7470A ICS Regent+Plus Analog Output Modules Manual de usuario Pagina 11

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