The GE Fanuc IC693ALG221, also cataloged as the IC693ALG221 Analog Current Input module, operates as a dedicated hardware component for converting analog field signals into digital registers within Series 90-30 platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC693ALG221 |
| Brand | GE Fanuc Emerson |
| Origin | United States |
| Weight | 0.37 kg (0.81 lbs) |
| Dimensions | Standard single slot width module |
| Operating Temp | Industry standard 0 to 60 deg C (ambient) |
| Power Consumption | 25 mA at 5 VDC, 100 mA at 24 VDC Isolated |
| Number of Channels | 4 single-ended input channels |
| Signal Range Options | 4-20 mA (default) or 0-20 mA |
| Input Resolution | 12-bit (4 uA / LSB for 4-20 mA; 5 uA / LSB for 0-20 mA) |
| Absolute Accuracy | 0.1% full scale + 0.1% reading |
| Linearity | < 1 Least Significant Bit (LSB) |
| Input Impedance | 250 ohms |
| Input Filter Response | 325 Hz |
| Channel Update Rate | 2 ms for all channels |
| Maximum Isolation | 1500 V RMS between field wiring and logic side |
| Common Mode Voltage | 200 V maximum |
| Internal Data Scaling | 0 to 32000 digital units |
Profinet / EtherNet/IP Deterministic Networks and I/O Density Scaling
The module translates physical loops into unitless integers over the internal bus structure, making processed variables available across active Profinet / EtherNet/IP deterministic networks. During high-density I/O density scaling configurations, the hardware relies on its internal 2 ms update cycle to deliver deterministic signal states to the central processor without causing backplane bus communication velocity latency. Optical and galvanic isolation barriers protect the underlying processing rack from electrical transients, preventing field-side noise propagation from compromising firmware flash compatibility across adjacent bus segments.
Frequently Asked Questions
Q: How is the physical signal range changed between 4-20 mA and 0-20 mA?
A: The signal range selection is hardware-configured by placing range jumpers directly onto the terminals of the removable terminal block. One jumper controls channels 1 and 2, while a second jumper sets the mode for channels 3 and 4.
Q: Can this module be installed into a remote expansion rack chassis?
A: Yes. The IC693ALG221 is compatible with standard, extended, or remote expansion baseplates within the Series 90-30 infrastructure. Ensure the host power supply has sufficient capacity on the 5 VDC and isolated 24 VDC lines to support the internal power consumption.
Field Installation Guidelines
- Turn off all power to the PLC rack and field loop instruments before mounting or unmounting the analog input card.
- Slot the module chassis into the backplane guides and pivot it down until the retention hook clicks firmly into the baseplate anchor notch.
- Terminate all analog loops using high-quality twisted, shielded pair instrumentation cables to minimize inductive coupling and capacitive loading anomalies.
- Tie the cable shields directly to the designated chassis frame earth ground bar; do not leave the shield wire floating or connected to common return paths.
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