GE IC694ALG391A Analog Output Module | Replacement, Equivalent & Selection Guide
The GE IC694ALG391A is an 8-channel analog output module designed for the GE PACSystems RX3i PLC platform. It delivers precise voltage and current signal outputs for process control applications in industrial automation. Whether you are sourcing an original unit, evaluating compatible replacements, or selecting the right module for your system, this guide covers everything you need.
Technical Specifications
- Part Number: IC694ALG391A
- Manufacturer: GE / GE Fanuc / Emerson Automation
- Series: PACSystems RX3i (Series 90-30 compatible backplane)
- Output Channels: 8 analog output channels
- Output Signal: Voltage: 0–10 V / ±10 V; Current: 4–20 mA
- Resolution: 12-bit (4096 steps)
- Update Rate: <1 ms per channel
- Isolation: Channel-to-backplane isolated
- Power Consumption: 5 VDC from backplane
- Operating Temperature: 0°C to 60°C
- Dimensions: Standard RX3i single-slot module
- Weight: 360 g (approx.)
- Certifications: CE, UL, cUL
Compatible Replacement & Equivalent Models
The following modules are commonly evaluated as replacements or equivalents for the IC694ALG391A. Always verify firmware, backplane, and software compatibility before substitution.
- IC694ALG392 – 8-ch analog output, extended diagnostics variant
- IC694ALG220 – 4-ch analog output (reduced channel count alternative)
- IC695ALG704 – RX3i HART analog output module (enhanced, requires RX3i backplane)
- IC695ALG708 – 8-ch HART-enabled analog output for RX3i (direct upgrade path)
- Siemens 6ES7135-4GB01-0AB0 – ET 200S analog output (cross-brand reference only)
- Rockwell 1756-OF8 – ControlLogix 8-ch analog output (cross-brand reference only)
Note: Cross-brand replacements require hardware and software re-engineering. Contact Konmask for selection support.
Why Choose the Original IC694ALG391A
- ✅ Drop-in replacement for existing RX3i / Series 90-30 systems — no re-programming required
- ✅ Proven field reliability in continuous process and discrete manufacturing environments
- ✅ Full compatibility with Proficy Machine Edition (PME) and legacy GE PLC software
- ✅ Supports both voltage and current output modes per channel via software configuration
- ✅ Minimizes downtime risk compared to cross-brand migration
Typical Applications
- Flow control valve positioning (4–20 mA setpoint output)
- Variable speed drive (VFD) speed reference signals
- Temperature setpoint control in furnace and HVAC systems
- Pressure regulator control in oil & gas and chemical plants
- Conveyor and motion control analog reference outputs
- Water treatment dosing pump control
System Compatibility
- Backplane: IC694CHS392, IC694CHS398, IC694CHS006, IC694CHS012 (RX3i / Series 90-30 compatible)
- CPU: IC694CPU300, IC694CPU310, IC694CPU320, IC694CPU360, IC695CPE302, IC695CPE305, IC695CPE310
- Power Supply: IC694PWR321, IC694PWR330, IC694PWR331
- Programming Software: Proficy Machine Edition (PME) 8.0+, Cimplicity, iFIX
Selection Guide
Use the following criteria to confirm the IC694ALG391A is the right module for your application:
- Channel count needed: 8 channels → IC694ALG391A ✅ | 4 channels → consider IC694ALG220
- HART protocol required: No → IC694ALG391A ✅ | Yes → upgrade to IC695ALG708
- Backplane type: Series 90-30 or RX3i → IC694ALG391A ✅ | RX3i only → IC695 series
- Output type: Voltage + Current (software selectable) → IC694ALG391A ✅
- Budget vs. new: Refurbished IC694ALG391A offers best cost-performance for legacy system maintenance
Quality Assurance & Sourcing
- All units at Konmask.com are inspected and tested prior to shipment
- Original GE / GE Fanuc / Emerson branded hardware — no counterfeit or clone parts
- Traceability documentation available upon request
- Warranty: 90-day replacement warranty on all stocked units
- Sourced from authorized distributors and verified industrial surplus channels
How to Order
- Confirm your backplane model and CPU firmware version
- Add IC694ALG391A to cart or contact us for bulk/project pricing
- Provide your shipping address — we ship worldwide from China
- Lead time: In-stock units ship within 1–3 business days
📧 Email: support@konmask.com
📞 Phone/WhatsApp: +0086 19859288691
Replacement & Compatibility FAQ
Q: Can IC694ALG391A replace IC694ALG392?
A: Yes, in most cases. The ALG392 adds enhanced diagnostics; if your application does not require them, ALG391A is a direct functional replacement.
Q: Is IC694ALG391A compatible with RX3i backplanes?
A: Yes. The IC694 series modules are backward-compatible with RX3i backplanes when used with appropriate CPU firmware.
Q: Can I use IC695ALG708 instead of IC694ALG391A?
A: The IC695ALG708 is a functional upgrade with HART support, but requires RX3i-only backplane and updated PME configuration. Not a drop-in replacement without engineering changes.
Q: Do you supply refurbished or new units?
A: We supply both. All units are tested and certified before shipment. Specify your preference when ordering.
Q: What is the lead time for IC694ALG391A?
A: In-stock units ship within 1–3 business days. Contact us for availability on large quantities.
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Contact: support@konmask.com | +0086 19859288691
