GE IS200EXTBG1AAA circuit board module

Description

GE General Electric Technical Specifications: IS200EXTBG1AAA

The 2-Channel Analog Voltage Output module for the Series 90-30 Programmable Logic

Controller provides two output channels, each capable of converting 13 bits of binary (digital) data

to an analog output for use as required by your application. The IS200EXTBG1AAA Analog Voltage Output module is

capable of providing outputs in the range of –10 to +10 volts. Resolution of the converted signal is

12 bits binary plus sign which is effectively 13 bits (1 part in 8192). Both channels are updated on

every scan (about 5 milliseconds). User data in the %AQ registers is in a 16-bit 2’s complement

format. The 13 most significant bits from the %AQ register are converted to sign magnitude by

the PLC and sent to the module for use by the D/A converter circuitry. The IS200EXTBG1AAA placement of the 13

bits converted to sign magnitude is shown below. The relationship between the voltage output and

the data from the D/A converter is shown in Figure 3-30.

The primary power source for the module is the isolated +24 VDC power supplied by the PLC

power supply. Two terminals are provided on the IS200EXTBG1AAA module’s terminal connector for user supplied

+24 volts. This allows you to provide a standby power supply, so that the outputs can continue

to hold their value if the internal supply is lost and Hold Last State is selected. Additionally,

you can also supply the module voltage to reduce the load on the PLC isolated +24 VDC power

supply. The user supply must be used when the applied voltage is 0.7 volts higher than the

isolated +24 VDC supply, which can range from 21.5 volts to 26.5 volts. An LED at the top of

the module’s faceplate is ON when the module’s power supply is operating.

To minimize capacitive loading and noise, all field connections should be wired using a good

grade of twisted, shielded instrumentation cable. The shields should be connected to GND on

the user terminal connector block. The GND connection provides access to the baseplate

(frame ground) resulting in superior rejection of noise caused by any shield drain currents.

The module provides electrical isolation of externally generated noise between field wiring and

the backplane through the use of optical isolation. This module can be installed in any I/O slot

of a 5 or 10-slot baseplate in a Series 90-30 PLC system. Refer to page 3-11 to determine the

number of Analog Voltage Output modules that can be installed in a system.

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