GE IS200FOSAG1A high-voltage grid interface board

Description

GE General Electric Technical Specifications: IS200FOSAG1A

In the 4 to 20 mA range, user data is scaled so that 4 mA corresponds to a count of 0 and 20 mA

corresponds to a count of 32000. The other ranges are selected by changing the configuration

parameters using the Logicmaster 90-30/20/Micro configurator IS200FOSAG1A software or the Hand-Held

Programmer. In the 0 to 20 mA range user data is scaled so that 0 mA corresponds to a count of 0

and 20 mA corresponds to a count of 32000. Full 12-bit resolution is available over the 0 to 20 mA

range.

A 4 to 20 mA Enhanced range can also be selected. When this range is selected, 0 mA corresponds

to a count of –8000, 4 mA corresponds to a count of 0 (zero) and 20 mA corresponds to a count of

+32000. The Enhanced range uses the same hardware as the 0 to 20 mA range but automatically

provides 4 to 20 mA range scaling with the IS200FOSAG1A exception that negative digital values are provided to

the user for input current levels between 4 mA and 0 mA. This gives you the capability of

selecting a low alarm limit that detects when the input current falls from 4 mA to 0 mA, which

provides for open-wire fault detection in 4 to 20 mA applications. High and Low alarm limits are

available on all ranges. Ranges can be configured on a per channel basis.

If the IS200FOSAG1A current source is reversed into the input, or is less than the low end of the current range,

then the module will output a data word corresponding to the low end of the current range

(0000H in %AI). If an input that is out of range is entered (that is, it is greater than 20 mA), the

A/D converter will output up to full scale (corresponding to 7FFFH in %AI).

Voltage Operation

In the 0 to +10 V default range, user data is scaled so that 0 volts corresponds to a count of 0 and

+10 volts corresponds to a count of 32000. The –10 to +10 volt range is selected by changing the

configuration parameters using the Logicmaster 90-30/20/Micro configurator software or the

Hand-Held Programmer. In the –10 to +10 volt range user data is scaled so that –10 volts

corresponds to a count of –32000 and +10 volts corresponds to a count of +32000. Full 12-bit

resolution is available over either range.

Since converters used in the analog input channels are 12-bit converters, not all of the 16 bits in

the data tables contain data required for the conversion. A version of the 12 bits is placed

within the 16-bit data word corresponding to the analog point (in the %AI table). The Series

90-30 PLC system handles the integration differently for the various analog modules.

The CPU does not manipulate the data from the input channels before placing it within the

word in the %AI data table. The bits in the %AI data table which were not used in the

conversion by the input channel are forced to 0 (zero) by the analog input channel. Placement

of the 12 data bits from the A/D converter for an analog current input data word for the

16-Channel Analog Voltage Input module in unipolar range is shown below.

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The maximum number of 8-Channel Analog Current/Voltage Output modules that can be installed

in a system are:

4 in a system using CPU Models 311, 313, or 323

8 in a system using CPU Model 331

32 in a system using CPU Models 340 and 341

64 in a system using CPU Models 350 – 364

Other Configuration Considerations

When planning the module configuration for your application you must also consider the load

capacity of the installed power supply and the total load requirements of all modules that are

installed in the baseplate.

Refer to Chapter 1 in this manual for details on power supply, baseplate, and module load

requirements. The following table lists the specifications for this module. Note that test conditions,

unless otherwise noted, are: VUSER = 24 VDC at an ambient temperature of 25 C (77 F)

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