Emerson IC693ALG392C Series 90-30 8-Channel Analog Output Module
An eight-channel single-ended analog output module supporting selectable 4–20 mA, 0–20 mA and bipolar or unipolar voltage ranges.
Product Profile
IC693ALG392C is a Series 90-30 eight-channel analog output module. Each single-ended channel can be configured for supported current or voltage operation, allowing one module to serve multiple documented output ranges.
The module uses an external 20 to 30 VDC user supply and backplane power. Revision C must remain in the asset record, and every channel range, scaling value, load and safe output state should be captured before replacement.
Technical Data
| Manufacturer | Emerson PACSystems / legacy GE Fanuc |
|---|---|
| Exact Model | IC693ALG392C |
| Platform | Series 90-30 |
| Product Type | Analog current / voltage output module |
| Channels | 8 single-ended outputs |
| Current Ranges | 4–20 mA or 0–20 mA |
| Voltage Ranges | 0–10 VDC or -10 to +10 VDC |
| External User Supply | 20 to 30 VDC; 24 VDC nominal |
| Update Rate | Approximately 8 ms for all eight channels |
| Resolution at 4–20 mA | 0.5 µA |
| Resolution at 0–20 mA | 0.625 µA |
| Voltage Resolution | 0.3125 mV |
| Backplane 5 VDC Demand | 110 mA |
| 24 VDC User-Supply Demand | 315 mA maximum |
| Current-Output Load | 0 to 850 ohms minimum at 20 VDC, increasing to the documented maximum with higher supply |
| Enclosure Guidance | Metal enclosure required for the documented RF-susceptibility performance |
| Revision | C |
System Role
Generates eight command signals for valves, drives, positioners and other analog actuators.
Allows current and voltage range selection through the controller hardware configuration.
Updates all eight outputs on a common approximately 8 ms cycle.
Reports module and channel conditions through the Series 90-30 controller environment.
Compatibility
- Confirm the baseplate, CPU firmware and programming software support IC693ALG392C.
- Calculate both the 5 VDC backplane load and 24 VDC user-supply demand.
- Check every field load against the selected current or voltage range and available compliance.
- Export scaling, raw counts, alarm handling and startup values before exchange.
- Use the specified metal enclosure and grounding practice where RF susceptibility is relevant.
Applications
- Analog commands to control valves and positioners.
- Speed, torque or reference signals for industrial drives.
- Eight-channel process-output replacement in Series 90-30 systems.
FAQ
Why can IC693ALG392C show correct logic values but no field output?
A missing external 24 VDC user supply, range mismatch, overloaded current loop or wiring error can leave the PLC data valid while the terminal signal is absent.
What should be saved before replacing IC693ALG392C?
Record each channel range, engineering scaling, raw reference, startup value, field load, cable shield and external supply.
Can one IC693ALG392C mix current and voltage outputs?
The module supports selectable channel ranges, but the exact project configuration and wiring must be confirmed channel by channel.
How should current channels on IC693ALG392C be load-tested?
Measure loop resistance and output current at several commanded values while verifying the external supply remains inside the specified range.
What causes noisy voltage output from IC693ALG392C?
Poor grounding, shield errors, shared returns, RF exposure or load coupling can add noise even when the module passes digital diagnostics.
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