The GE Fanuc IC694ALG392, also cataloged as the IC694ALG392 Analog Output Module, operates as a dedicated hardware component for multi-channel analog signal control and modulating field loop execution within PACSystem RX3i platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC694ALG392 |
| Brand | GE Fanuc / Emerson |
| Origin | USA / As specified on hardware label |
| Weight | 0.69 lbs (0.31 kg) |
| Dimensions | Standard single RX3i I/O slot footprint |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 110 mA @ +5 VDC backplane supply; 315 mA @ +24 VDC user supply |
| Output Channels | 8 single-ended output channels (1 to 8 selectable) |
| Voltage Output Ranges | 0 to +10 VDC (unipolar), -10 to +10 VDC (bipolar) |
| Current Output Ranges | 0 to 20 mA, 4 to 20 mA |
| Output Resolution | 4-20 mA: 0.5 uA/LSB; 0-20 mA: 0.625 uA/LSB; 0-10V / +/-10V: 0.3125 mV/LSB |
| Absolute Accuracy (Voltage) | +/-0.25% typical, +/-0.5% max @ 25 deg C; +/-1.0% max over operating temp range |
| Channel Update Rate | 8 ms for all active channels |
| External Power Supply | 20 to 30 VDC (10% max ripple) |
| System Compatibility | PACSystem RX3i, Series 90-30 PLCs, Series 90-70 PLCs |
Backplane Bus Communication Velocity and Firmware Flash Compatibility
The IC694ALG392 routes process control updates directly across the rack backplane using 15-bit to 16-bit signal conversion resolutions. Each output channel executes 8 ms cyclic update intervals without degrading backplane bus communication velocity. Onboard current-mode diagnostics actively detect open-wire wire faults and log channel-level failures to the CPU system tables. Output behavior upon power interruption or logic loss is configurable per channel, allowing outputs to hold last state or reset to zero to match system fail-safe operational logic.
Frequently Asked Questions
Q: What are the backplane and external power supply requirements for the IC694ALG392?
A: The module draws 110 mA from the internal +5 VDC backplane bus and requires an external user power supply delivering 20 to 30 VDC at 315 mA.
Q: How does the IC694ALG392 handle channel wiring fault conditions in current output mode?
A: During current output mode (4-20 mA or 0-20 mA), the module senses open-circuit or loose wiring conditions and immediately reports an open-wire fault to the CPU diagnostics table.
Field Installation Guidelines
- Seat the IC694ALG392 module firmly into any available universal or expansion I/O slot in the RX3i or Series 90-30 chassis until the module latches engage.
- Land field actuators, modulating valves, or signal converters onto the removable terminal block assembly using twisted-pair, shielded wiring.
- Connect an external 24 VDC power source (20 to 30 VDC range) to the specified terminal connections to power the analog output driver circuitry.
- Connect cable shield drain wires directly to the system cabinet grounding busbar to prevent electromagnetic noise coupling into analog field loops.
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