Product Overview
The GE IC693ALG221 accepts 4-20 mA current signals from field transmitters for the GE 90-30 PLC series. This input module converts analog current values into digital data for the CPU. Process monitoring systems depend on this unit for accurate flow and pressure readings. The module’s high-precision circuitry ensures reliable measurement in demanding industrial environments.
Technical Specifications
This analog input module offers four isolated channels for current signal acquisition. The GE IC693ALG221 features 12-bit resolution for adequate measurement granularity. Its built-in filtering eliminates high-frequency noise from variable frequency drives. The module provides optical isolation between field wiring and the PLC backplane.
| Parameter | Specification |
|---|---|
| Product Type | Analog Current Input Module |
| Series Compatibility | GE 90-30 PLC Series |
| Number of Inputs | 4 analog current input channels |
| Input Current Range | 4-20 mA (standard) |
| Input Impedance | 250 Ω ± 0.1% |
| Resolution | 12-bit (0-4095 counts) |
| Accuracy | ±0.25% of full scale at 25°C |
| Accuracy Drift | ±50 ppm/°C typical |
| Update Rate | 5 ms per channel |
| Common Mode Rejection | 70 dB minimum at 50/60 Hz |
| Normal Mode Rejection | 30 dB at 50/60 Hz |
| Input Overload Protection | ±30 V DC continuous |
| Electrical Isolation | 1,500 V AC between field and backplane |
| Supply Voltage | 5 V DC from backplane |
| Current Consumption | Maximum 0.12 A (5V) |
| Dimensions (W x H x D) | 25 mm x 130 mm x 110 mm |
| Weight | Approximately 0.28 kg |
| Connector Type | 24-pin terminal block (removable) |
| Number of Connectors | 1 (with screw clamps) |
| Energy Storage | None (passive input circuit) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% RH (non-condensing) |
Input Signal Processing
The GE IC693ALG221 converts each 4-20 mA loop current into a 12-bit digital value. Its 250 Ω precision resistor develops a measurable voltage drop for the A/D converter. The module reads each channel sequentially and presents the data to the CPU. This board’s filtering eliminates process noise for stable control loop operation.
Channel Configuration
Each of the four channels operates independently within the 4-20 mA range. The GE IC693ALG221 accepts signals from two-wire transmitters and four-wire devices. Users can configure each channel with scaling values in the programming software. The module’s firmware handles raw counts conversion to engineering units seamlessly.
Diagnostics and Status Indication
The GE IC693ALG221 includes LED indicators for power and communication status. Its diagnostic functions detect open circuits and out-of-range currents. The module reports fault conditions to the CPU for alarm handling. This diagnostic capability reduces troubleshooting time and enhances system reliability.
Installation and Wiring
Users connect field wiring to the removable terminal block for convenience. The GE IC693ALG221 supports both grounded and ungrounded transmitters. Its optical isolation prevents ground loops from affecting measurement accuracy. The module’s compact size allows easy installation in 90-30 racks.
Application Scenarios
This module finds use in chemical processing for flow and level measurement. It also serves in water treatment plants and pulp and paper facilities. The GE IC693ALG221 delivers stable analog measurement for various industrial applications.
Details
| Weight | 0.28 kg |
|---|---|
| Dimensions | 25 × 130 × 110 mm |
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