GE IC693ALG221E Analog Input Module

Technical Specifications

Parameter	Value
Model	IC693ALG221E
Category	Current Analog Input Module
Weight	0.88 lbs (0.40 kg)
Dimensions	5.9 x 4.3 x 1.6 inches
Input Channels	4 differential analog inputs
Input Current Range	4-20 mA or 0-20 mA
Resolution	12 bits (1.22 µA per LSB)
Update Rate	7.5 ms per channel
Accuracy	±0.25% of full scale
Onboard Components	87 discrete parts
Energy Storage	3 x 100µF capacitors
Operating Voltage	5V DC from backplane
Power Draw	75 mA from 5V bus

Physical Construction and Component Layout

This IC693ALG221E module measures 5.9 inches in height. Its width reaches 4.3 inches with a depth of 1.6 inches. The total weight comes to approximately 0.88 pounds. Manufacturers placed 87 discrete components on this PCB. These components include precision resistors, op-amps, and protection diodes. The board uses a four-layer design for better noise immunity.

Signal Conversion and Input Handling

IC693ALG221E accepts four differential analog current signals. Each channel supports both 4-20 mA and 0-20 mA ranges. A 12-bit analog-to-digital converter provides fine resolution. The converter delivers 1.22 microamps per least significant bit. Channel update timing reaches 7.5 milliseconds per input. Consequently, you get full scanning of all four channels every 30 milliseconds. Measurement accuracy stays within ±0.25% of the full scale range.

Energy Storage and Power Requirements

The analog input module integrates three 100µF electrolytic capacitors. These capacitors smooth out power supply fluctuations effectively. For backplane connection, the module draws 75 milliamps from the 5V DC bus. This low power consumption keeps heat generation minimal. Additionally, the circuit design includes reverse polarity protection on signal inputs.

Field Wiring and Application Use

You can connect two-wire or four-wire transmitters directly to this module. It works well for pressure sensors, flow meters, and temperature transmitters. The IC693ALG221E performs reliably from 0°C to 60°C ambient. Factory automation systems often use this card for analog process monitoring. Therefore, it serves as a dependable choice for GE PLC systems.