Description

GE Analog I/O Module IC693ALG391

• Extended Product Type : Series 90-30

• Product ID: IC693ALG391

• GE Type Designation : Series 90-30

• Description: 64 Megabytes user logic memory, 1GHz processor speed

Description

The 2-Channel Analog Current Output module for the Series 90-30 Programmable Logic
Controller provides two output channels, each capable of converting 12 bits of binary (digital)
data to an analog output for use as required by your application. The Analog Current Output
module is capable of providing outputs in the range of 0 to 20 mA. Resolution of the
converted signal is 12 bits binary (1 part in 4096). The sign bit is not used in the conversion
process. 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. Twelve of
the bits are used by the D/A converter; the 13th bit (sign) is used to determine if negative data
was sent to the module.
The placement of the 13 bits within the data word is shown below. The relationship between
the current output and the data from the D/A converter is shown in Figures 3-34 and 3-35.

Specification

• Module Type: Analog Output
• Range  : 1-5 V and 0-5 V, 0-20 mA, 4-20 mA
• Number of Channels : 8
• Accuracy :0-20 mA, ±8 µA at 25ºC (77ºF); 0-20 mA, 4-20 mA ±0.1% at 25ºC (77ºF)
• Internal Power Used : 30 mA @ 5 VDC; 215 mA 24 VDC Isolated