Product Core Brief

• Model:
• Brand: GE Fanuc / Emerson Automation
• Series: PACSystems RX3i Serial Expansion I/O (IC694 Platform)
• Core Function: 8-channel analog output module for IC694 serial expansion racks, converts digital %AQ register values into analog voltage/current signals to drive modulating valves, VFDs and positioners.
• Product Type: Single-width Serial Expansion Analog Output Module
• Key Specs: 8 single-ended channels | 16-bit resolution | Software-selectable ranges per channel | Backplane-to-field galvanic isolation | Requires external 24VDC field supply Note: Discontinued legacy expansion analog module; new original stock limited, surplus & refurbished widely available. Install exclusively on IC694CHS392 / IC694CHS398 serial expansion baseplates. CANNOT plug directly into IC695CHSxxx RX3i main racks. No hot swap support. Conformal coated variant: IC694ALG392CA. Functionally equivalent to IC693ALG392 for Series 90-30 native racks (form factor incompatible).

 

Key Technical Specifications

• Channel Layout: 8 single-ended analog output channels
• Software Selectable Signal Ranges (per-channel independent): ±10 VDC, 0–10 VDC, 0–20 mA, 4–20 mA
• Resolution: 16-bit
• Full Module Update Time: 8 ms for all 8 channels
• Load Limits Voltage mode: Minimum load resistance ≥2 kΩ Current mode: Maximum loop resistance ≤850 Ω
• Accuracy: ±0.1% FS (current ranges) / ±0.25% FS (voltage ranges) @25°C
• Isolation Rating: 1500 VAC 1-minute withstand between field circuit and backplane
• Diagnostics: Open-circuit detection for current loops, over-range alarm reporting
• Fail-Safe Function: Configurable – Hold last value or preset output upon communication loss
• Backplane Power Consumption 5 VDC: 110 mA
• External Field Supply: 19.2 ~ 30 VDC (nominal 24 VDC), max 315 mA
• Front Panel LED Indicators: MODULE OK, USER SUPPLY OK
• Operating Temperature: 0°C ~ +60°C horizontal cabinet mounting
• Storage Temperature: -40°C ~ +85°C
• Form Factor: Single-width IC694 module
• Compatible Expansion Baseplates: IC694CHS392 (10-slot), IC694CHS398 (5-slot)
• System Compatibility: RX3i CPU via IC695LRE001 serial expansion transceiver
• Supported Software: Proficy Machine Edition
• Agency Certifications: UL508, Class I Div.2, CE, ATEX Zone 2, DNV Marine approval

 

Product Introduction

is an analog output module designed for RX3i serial expansion remote racks, widely deployed during plant migration from Series 90-30 to RX3i platform. It provides analog control outputs for modulating process field devices.

Critical Platform Distinction

1. : For IC694 serial expansion baseplates (remote expansion racks connected via IC695LRE001)
2. IC693ALG392: Native Series 90-30 main rack module
3. IC695ALG808 / ALG704: Native RX3i main rack analog output modules Electrical specifications are similar, but physical form factor and backplane bus differ; not directly interchangeable.

Each channel can independently run voltage or current mode, enabling mixed signal types on one module. Built-in open-circuit diagnostics detect broken 4–20mA field wiring and send fault alarms to the master RX3i CPU.

Important Limitation: No channel-to-channel isolation, only field-to-backplane isolation. For heavy ground-loop environments, select isolated analog architectures or add signal isolators externally. No native HART protocol support.

 

QA & Testing SOP (Transparency Building)

1. Incoming Inspection: Verify part marking and hardware suffix. Inspect backplane gold pins for oxidation/bending; check terminal connector and housing integrity.
2. Live Testing: Mount onto validated IC694CHS expansion baseplate. Apply rack backplane power and external 24VDC field supply. Perform full-scale ramp testing on all channels with precision loads, verify open-circuit diagnostic function, run continuous 24-hour stability test.
3. Electrical Testing: Monitor backplane 5V rail stability. Insulation resistance ≥10MΩ between field circuit and chassis protective ground.
4. Documentation: Record hardware revision; photograph terminal wiring layout before disassembly.
5. Final QC & Packaging: Place unit inside anti-static shielding. Attach dated QC test tag confirming analog output accuracy and diagnostic function validation prior to shipment.

 

Installation Pitfalls & Guide

❗ No Hot Swap Support: Modules on IC694 serial expansion racks cannot be hot swapped. Full remote rack power shutdown mandatory before removal. ❗ Strict Baseplate Compatibility: Only install on IC694CHS392 / IC694CHS398; cannot be inserted into IC695CHS RX3i main racks. ❗ External 24VDC Mandate: Without user field supply, analog outputs will not function. Loss of supply triggers configured fail-safe state. ❗ Load Resistance Limits: Current loops exceeding 850Ω total resistance cause clipped output and false open-circuit faults. ❗ Non-Isolated Channel Warning: All channels share common analog ground; avoid multi-point grounding to prevent ground loops and measurement drift. ❗ Conformal Coated Variant Note: IC694ALG392CA = conformal coated PCB for humid/corrosive environments; electrically identical. ❗ ESD Risk: Static discharge damages DAC front-end circuits, leading to output offset drift and unstable control signals.

Replacement Guide

1. Pre-install: Lockout-tagout expansion rack power; back up master PLC I/O configuration. Photograph slot layout, analog field wiring and 24VDC supply connections.
2. Removal: Disconnect all field analog wiring, unlatch module and slide straight out without twisting backplane pins.
3. Install: Seat new into original slot on expansion baseplate, replicate all field wiring connections.
4. Power-on Test: Restore rack power; confirm MODULE OK / USER SUPPLY LEDs steady, download I/O configuration, verify all channel output operation and open-circuit diagnostics.

 

FAQ

Q: Does support hot swapping? A: No. All modules on serial expansion racks do not support hot swap. Full rack power shutdown required.

Q: What is the difference between and IC693ALG392? A: Electrical specifications identical; different mechanical form factor and backplane interface.

• : serial expansion baseplate (RX3i remote rack)
• IC693ALG392: Direct plug-in for Series 90-30 main backplane Not physically interchangeable.

Q: Can I mix voltage and current signal ranges on the same module? A: Yes, each channel can be independently configured via PME software.

Q: Does provide channel-to-channel isolation? A: No, only field-to-backplane isolation. Channels share common analog ground.

Q: Can this module be installed directly into IC695CHS007 main RX3i rack? A: No. Mechanical and backplane bus incompatible.

Q: Will I/O configuration automatically load onto a replacement module? A: Channel configuration resides in the RX3i master CPU project. After replacement, verify channel ranges and fail-safe parameters, perform full output calibration check.