GE IC695ALG312 – 12-Channel Isolated Thermocouple Input Module | PACSystems RX3i Platform
Engineering Background: The IC695ALG312 is a high-precision analog input module developed by GE Automation (now GE Vernova) for the PACSystems RX3i control platform. Designed to meet the demanding requirements of industrial process measurement, this module provides fully isolated thermocouple signal acquisition with exceptional noise immunity — a critical requirement in high-voltage, high-interference plant environments such as power generation, petrochemical processing, and metal smelting.
Product Positioning: As a drop-in expansion module for the RX3i Universal Backplane, the IC695ALG312 enables engineers to consolidate multi-zone temperature monitoring into a single, compact slot. Its channel-to-channel isolation architecture eliminates ground loop interference, making it the preferred choice for distributed temperature sensing across large industrial installations.
Complete Technical Specifications
- Part Number: IC695ALG312
- Platform: GE PACSystems RX3i
- Module Type: Isolated Thermocouple Analog Input
- Number of Channels: 12 (individually isolated)
- Supported TC Types: B, E, J, K, N, R, S, T (IEC 60584 compliant)
- Resolution: 16-bit ADC
- Input Range: −270°C to +1820°C (type-dependent)
- Accuracy: ±1°C typical (at 25°C ambient)
- Cold Junction Compensation (CJC): Automatic, internal sensor per channel group
- Channel-to-Channel Isolation: Yes — fully isolated per channel
- Channel-to-Backplane Isolation: 250 V AC continuous
- Update Rate: Configurable; typical scan ~100 ms for all 12 channels
- Open-Wire Detection: Yes — per channel fault reporting
- Backplane Interface: RX3i Universal Backplane (IC695CHS007, IC695CHS012, IC695CHS016)
- Power Consumption: 3.3 W typical from backplane
- Operating Temperature: 0°C to +60°C
- Storage Temperature: −40°C to +85°C
- Relative Humidity: 5% to 95% non-condensing
- Dimensions (H × W × D): 230 mm × 33 mm × 130 mm (approx.)
- Weight: ~1,250 g
- Certifications: CE, UL, cUL, RoHS compliant
- Firmware Compatibility: RX3i CPU firmware v7.80 and above
Proven Application Environments
- Power Generation: Turbine exhaust gas temperature monitoring across multi-zone arrays
- Petrochemical & Refining: Reactor and distillation column temperature profiling
- Metal & Steel Processing: Furnace zone control with isolated TC inputs to prevent ground loops
- Pharmaceutical Manufacturing: Autoclave and clean-room temperature validation (21 CFR Part 11 environments)
- Food & Beverage: Pasteurization and CIP process temperature control
- Water Treatment: Boiler and heat exchanger monitoring in high-EMI pump rooms
Engineering Advantages
- Full Channel Isolation: Eliminates ground loop errors common in multi-point TC installations — no need for external signal conditioners
- Automatic CJC: Internal cold junction compensation per channel group removes the need for isothermal terminal blocks
- Open-Wire Fault Detection: Each channel reports open-circuit faults to the CPU in real time, enabling predictive maintenance workflows
- Universal TC Type Support: A single module covers all standard IEC TC types — reduces spare parts inventory complexity
- RX3i Ecosystem Integration: Native backplane communication with PACSystems CPUs (IC695CPE302, IC695CPE305, IC695CPE400) — no gateway or protocol conversion required
- High-Density Design: 12 isolated channels in one single-slot module — maximizes backplane utilization in space-constrained panels
System Architecture & Signal Flow
The IC695ALG312 occupies one slot on the RX3i Universal Backplane. Thermocouple signals enter via the front-face removable terminal block (field wiring connector). Each channel passes through an individual isolation barrier before reaching the 16-bit sigma-delta ADC. The digitized temperature value — with automatic CJC correction applied — is transferred across the backplane to the RX3i CPU via the high-speed serial backplane bus. The CPU maps each channel to a configurable %AI reference address in the PACSystems memory model. Channel fault status (open wire, over-range, under-range) is reported via the module’s status word, accessible in the CPU’s fault table and via Proficy Machine Edition (PME) diagnostics.
Compatible CPUs: IC695CPE302 / IC695CPE305 / IC695CPE310 / IC695CPE400 / IC695CPE410
Compatible Backplanes: IC695CHS007 / IC695CHS012 / IC695CHS016
Programming Software: Proficy Machine Edition (PME) v9.0+
Sourcing & Quality Verification
- Origin: Genuine OEM — sourced from authorized GE Vernova distribution channels and verified surplus inventory
- Inspection Protocol: Each unit undergoes visual inspection, label verification (part number, date code, revision level), and functional power-on check prior to shipment
- Packaging: Anti-static ESD bag + foam-lined carton; conforms to IEC 61340-5-1 ESD protection standards
- Warranty: 12-month replacement warranty against manufacturing defects
- Traceability: Serial number and revision level documented per order for audit trail compliance
Procurement Process
- Submit your RFQ via konmask.com/pages/contact or email support@konmask.com
- Receive a formal quotation with lead time, revision level, and unit pricing within 24 business hours
- Confirm purchase order — we accept T/T wire transfer, PayPal, and major credit cards
- Unit ships within 1–3 business days via DHL Express, FedEx International, or UPS (tracking provided)
- Post-delivery technical support available via email and WhatsApp (+86 198 5928 8691)
Technical FAQ
Q: Can the IC695ALG312 be used in a mixed-module RX3i backplane alongside digital I/O modules?
A: Yes. The RX3i Universal Backplane supports mixed module types in any slot. The IC695ALG312 requires no dedicated slot position.
Q: Does this module support millivolt (mV) input mode in addition to thermocouple types?
A: The IC695ALG312 is optimized for thermocouple inputs. For direct mV or RTD inputs, refer to the IC695ALG600 (RTD/resistance) or IC695ALG616 (universal analog) modules.
Q: What is the maximum cable length for thermocouple wiring to this module?
A: GE recommends a maximum of 300 m (1,000 ft) using appropriate TC extension wire (matching alloy type). Shielded, twisted-pair TC extension cable is strongly recommended in high-EMI environments.
Q: Is firmware upgrade required when installing this module in an existing RX3i system?
A: The module is compatible with RX3i CPU firmware v7.80 and above. Systems running earlier firmware should be updated via Proficy Machine Edition before commissioning.
Q: Can I order a single unit, or is there a minimum order quantity?
A: Single-unit orders are accepted. Volume pricing is available for orders of 3 units or more — contact us for a tiered quote.
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