Configured for high-density analog current signal acquisition in RX3i PacSystem networks, the GE IC694ALG223 (IC694ALG223 Analog Input Module) provides direct physical/electrical execution. The hardware occupies a single chassis slot to route and digitize signals from field transmitters, transducers, and current loops directly into the central processing architecture.
| Parameter | Specification |
|---|---|
| Model | IC694ALG223 |
| Brand | GE Fanuc Emerson |
| Origin | USA |
| Weight | 0.51 kg (1.13 lbs) |
| Dimensions | Single-slot chassis profile |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 120 mA @ 5 VDC (backplane bus draw) |
| Input Channels | 16 single-ended channels |
| Nominal Input Signals | 0-20 mA, 4-20 mA (normal), 4-20 mA (enhanced) |
| Digital Resolution | 12-bit conversion matrix |
| Channel Update Rate | 13 ms (6 ms variant configuration) |
| Input Impedance | 250 ohms |
| External Supply Range | 20 to 30 VDC (24 VDC nominal, 65 mA current draw) |
| Absolute Accuracy | +/- 0.25% of full scale @ 25 deg C; +/- 0.5% over temperature |
| Low Pass Filter Response | 19 Hz |
| Common Mode Rejection | > 70 dB for DC up to 1 kHz |
The IC694ALG223 leverages localized backplane bus communication velocity configurations to stream continuous digital equivalents without causing control loop delays. Field scaling remains consistent through defined hardware registers, ensuring precise I/O density scaling profiles across expanding remote racks. Dedicated firmware flash compatibility enables advanced diagnostics, including per-channel open-wire fault detection down to 0 mA within the 4-20 mA enhanced input window, while transmitting continuous external power supply status flags directly to designated CPU memory addresses.
Q: How does the module handle open-wire faults on critical 4-20 mA signal runs?
A: When configured for the 4-20 mA enhanced input range, the internal logic maps current signals dropping below 4 mA down to 0 mA as an open-wire fault condition. This state triggers a diagnostic bit that registers immediately in the CPU fault table.
Q: Can this module operate without a secondary external voltage supply?
A: No. While backplane logic requires 120 mA at 5 VDC to maintain communication, the 16 internal current loops require an external 20 to 30 VDC power source drawing 65 mA to bias the field circuits correctly.
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