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ICS Regent

6025

Industrial Control Services

Analog Output Modules

4 to 20 mA

(T3470A)

Issue 1,

March, 06

Analog output modules provide 4 to 20 mA current outputs for

a maximum of eight user loads per module. The module's

triplicated I/O Safetybus interface ensures that no R

egent

system failure will inadvertently affect the output signal, and

that no failure in the module can affect the operation of the

Regent system or other I/O modules in the system.

Features

Eight 4 to 20 mA output circuits.

High resolution 12

bit D/A converter per output.

Hot

replaceable.

Automatic testing of triplicate I/O Safetybus circuits and many

simplex logic circuit

Front panel indicators on each module show active/fault and

shutdown status.

2500 volt minimum electrical isolation between field and logic

circuits.

TÜV certified, Risk Class 5, non

interfering.

Module Operation

A block diagram of the analog output module is shown in

Figure

The processor modules send triplicated write data commands

to the output module over the I/O Safet

ybus. The processors’

addressing data and data write commands are voted by the

module (preventing I/O Safetybus failures upstream from the

Summary of content (18 pages)

PAGE 1
ICS Regent ® PD-6025 Analog Output Modules 4 to 20 mA (T3470A) Issue 1, March, 06 Analog output modules provide 4 to 20 mA current outputs for a maximum of eight user loads per module. The module's triplicated I/O Safetybus interface ensures that no Regent system failure will inadvertently affect the output signal, and that no failure in the module can affect the operation of the Regent system or other I/O modules in the system. Features · Eight 4 to 20 mA output circuits.
PAGE 2
Analog Output Modules (T3470A) module from affecting module operation). The voted result is then passed to the I/O bus interface logic. The voted output data from the I/O bus interface logic is then used to drive individual digital-to-analog (D/A) converters per output channel. The field-side D/A output circuits are optically isolated from the I/O bus interface logic circuits and receive power from the external power supply.
PAGE 3
Analog Output Modules (T3470A) to return the correct majority-voted result to the processors produces an I/O module error indication at the processor modules and a module fault indication at the I/O module. Each type of module has a unique identification code that is read by the controller. This code lets the controller know which type of module is installed in each I/O chassis slot and how to address that module and its points specifically.
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Analog Output Modules (T3470A) Figure 2. Analog Output Module.
PAGE 5
Analog Output Modules (T3470A) Shutdown Indicator Upon loss of communications with the controller, output modules enter either a shutdown or hold fault mode. If the I/O unit is set to shutdown, the red SHUTDOWN indicator will turn on when communications with the controller are lost. If the I/O unit is set to hold, the SHUTDOWN indicator will always be off (see page 8, Fault Mode Jumper).
PAGE 6
Analog Output Modules (T3470A) For high integrity applications requiring fail-safe or fault tolerant analog outputs, guarded analog outputs should be used. Field Wiring Field wiring terminal blocks on the I/O chassis are used to connect an external 24 VDC power source and analog loads to the module. The terminal blocks are located directly above and below the slot where the module is installed. Each terminal block consists of ten #6 wire clamp screw terminals capable of holding two 12 AWG wires.
PAGE 7
Analog Output Modules (T3470A) Figure 4. Module Wiring.
PAGE 8
Analog Output Modules (T3470A) Fault Mode Jumper The fault mode jumper is located behind the ID switch cover in the lower left-hand corner of each I/O chassis. The position of the fault mode jumper determines the module's response to system level faults. The fault mode jumper’s position will cause all output modules in the I/O chassis to either shutdown (turn off all outputs) or to hold (hold the last state) after a system level failure occurs.
PAGE 9
Analog Output Modules (T3470A) Figure 5. Installing Slot Keys. Configuration Each output module is configured using the WINTERPRET I/O Configuration Editor. In the editor you will perform the three steps described below to configure the output module.
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Analog Output Modules (T3470A) 1) Set the Module Type: Position the cursor on the module slot you wish to define. Choose Set Module Type from the Edit Menu and select the appropriate analog output module from the list. 2) Edit the Module Definition: Choose Edit Module Definition from the Edit Menu. A dialog box will open where you can define the analog output point definitions. Figure 6. Analog Output Module Definition.
PAGE 11
Analog Output Modules (T3470A) Figure 7. Defining an Analog Output Point. Name Also called the tag name, this is the name used in the application program to reference the output point. The name can be up to 12 characters long. Description This 40-character field provides a place to describe the output point definition. The description is used to help document your system (it does not affect application program operation).
PAGE 12
Analog Output Modules (T3470A) Programming Outputs are controlled by writing application programs that solve for output values. For example, placing an output tag name in the result field of a math element in ladder logic will set the analog output to the value calculated by the math element. Note that the data range for analog outputs is 0 to 4095 corresponding to the output current rage of 4 to 20 mA.
PAGE 13
Analog Output Modules (T3470A) control logic, you maintain the full resolution of the analog output (1 part in 4096) and have a convenient engineering 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.
PAGE 14
Analog Output Modules (T3470A) Figure 9). During the calibration steps you will remove the printed circuit board from the housing in order to access these potentiometers for adjustment. Figure 9. Analog Output Module Calibration Potentiometer Locations. The I/O extender module has jumper posts that allow you to connect or disconnect the I/O slot field wiring on the I/O chassis to the printed circuit board plugged into the I/O extender.
PAGE 15
Analog Output Modules (T3470A) precision load resistors to the analog outputs. Figure 10 shows the jumper posts to which you should connect the precision resistors for each analog output channel. Figure 10. I/O Extender Connections for Analog Output Calibration. Important! Within each pair of jumper posts, make sure that you connect the resistors to the jumper posts nearest the front of the I/O extender.
PAGE 16
Analog Output Modules (T3470A) 2. Install the I/O extender module into the slot from which the module was removed. 3. Remove the jumpers (if installed) labeled CH1 through CH16 from the I/O extender module. 4. Connect the eight precision resistors to the I/O extender jumper posts as shown in Figure 10. Use test clips as required to make the connections. 5. Remove the four screws on one side of the module and remove the printed circuit board from the module clamshell housing. 6.
PAGE 17
Analog Output Modules (T3470A) analog output module to the factory for repair or replacement. 14. Calibration is complete. Unplug the printed circuit board from the I/O extender module and replace it in its clamshell housing. Remove all forcing of the analog outputs from the force table using WINTERPRET. Remove the I/O extender module from the I/O chassis and reinstall the calibrated module in the I/O chassis.
PAGE 18
Analog Output Modules (T3470A) Heat Dissipation 10 Watts, 33 BTUs/hour Operating Temperature 0° to 60° C (32° to 140° F) Storage Temperature -40° to 85° C (-40° to 185° F) Operating Humidity 0 to 95% relative humidity, non-condensing Vibration 10 to 55 Hz: ±0.