Allen-Bradley 1769-IT6 – 6-Channel Thermocouple Input Module | CompactLogix 1769 Series
Engineering Background
The 1769-IT6 is a dedicated thermocouple and millivolt analog input module designed for the Allen-Bradley CompactLogix and MicroLogix 1769 compact I/O platform. Engineered by Rockwell Automation to deliver high-resolution temperature measurement in space-constrained control panels, it provides six independently configurable channels capable of accepting all major thermocouple types as well as raw millivolt signals — making it the preferred choice for process engineers who demand accuracy, flexibility, and seamless Studio 5000 / RSLogix 5000 integration.
Product Positioning
Konmask.com supplies the 1769-IT6 as a verified OEM component sourced through authorized industrial distribution channels. Each unit undergoes visual inspection and label authentication prior to dispatch. This module is positioned for procurement engineers who require a drop-in replacement or new-build component with full traceability and rapid lead times — without the risk of counterfeit or refurbished stock.
Complete Technical Specifications
- Catalog Number: 1769-IT6
- Manufacturer: Allen-Bradley / Rockwell Automation
- Series / Platform: Compact I/O (1769)
- Compatible Controllers: CompactLogix L1x, L2x, L3x, L4x, L5x; MicroLogix 1500 (with 1769 expansion)
- Number of Input Channels: 6 (differential)
- Input Types Supported: J, K, T, E, R, S, B thermocouple types; ±150 mV millivolt range
- Resolution: 16-bit (including sign bit)
- Accuracy: ±1°C typical (thermocouple type dependent)
- Cold Junction Compensation (CJC): Automatic, internal sensor
- Open-Wire Detection: Yes, per channel
- Data Format: Engineering units (°C / °F / K) or raw proportional counts
- Update Rate: ~170 ms per channel (all 6 channels)
- Input Impedance: >1 MΩ
- Common Mode Rejection: 120 dB @ 50/60 Hz
- Normal Mode Rejection: 65 dB @ 50/60 Hz
- Backplane Current Draw: 75 mA @ 5 VDC
- Power Dissipation: 0.375 W (max)
- Operating Temperature: 0 °C to +60 °C (IEC 60068-2-1/2)
- Storage Temperature: -40 °C to +85 °C
- Relative Humidity: 5–95% non-condensing
- Vibration: 2 g @ 10–500 Hz (IEC 60068-2-6)
- Shock: 30 g operational (IEC 60068-2-27)
- Enclosure Rating: Open type (panel-mount, IP20 equivalent)
- Agency Certifications: UL Listed, CE Marked, C-Tick, ATEX Zone 2 (with appropriate enclosure)
- Dimensions (H × W × D): 90 mm × 35 mm × 87 mm
- Weight: Approx. 0.15 kg
- Wiring: Removable terminal block, 0.2–2.5 mm² (24–12 AWG)
Proven Application Environments
- Furnace & Kiln Control: Multi-zone temperature profiling with K-type or S-type thermocouples in ceramic, glass, and metal heat-treatment processes.
- Food & Beverage Processing: Pasteurization and sterilization loop monitoring where J-type or T-type sensors are standard.
- Plastics & Extrusion: Barrel zone temperature control on injection molding and extrusion lines requiring tight ±1°C accuracy.
- HVAC & Building Automation: Duct and plenum temperature monitoring integrated into CompactLogix-based BMS architectures.
- Oil & Gas / Petrochemical: Process temperature acquisition in non-hazardous or Zone 2 classified areas (with appropriate enclosure).
- Pharmaceutical Manufacturing: Validated temperature logging for autoclave and clean-room environments requiring 21 CFR Part 11 audit trails via FactoryTalk.
Engineering Advantages
- Universal Thermocouple Compatibility: A single module covers all seven IEC-standard thermocouple types plus raw mV — eliminating the need for type-specific modules and simplifying spare-parts inventory.
- Automatic Cold Junction Compensation: Eliminates external reference junction hardware, reducing wiring complexity and potential error sources.
- Per-Channel Open-Wire Fault Detection: Immediately flags broken or disconnected sensor leads in the controller tag database, enabling rapid fault diagnosis without field inspection.
- Native Studio 5000 / RSLogix 5000 Integration: Module configuration is performed entirely within the Logix programming environment — no external configuration tool or DIP switches required.
- Compact 1769 Form Factor: 35 mm wide profile allows high channel density in space-constrained panels; right-bus or left-bus mounting supported.
- High Common Mode Rejection: 120 dB rejection at 50/60 Hz ensures reliable readings in electrically noisy industrial environments.
System Architecture & Signal Flow
The 1769-IT6 connects directly to the 1769 compact I/O bus via its integrated side-bus connector. Each of the six differential input channels routes through a dedicated 24-bit sigma-delta ADC front end. An internal cold junction compensation sensor continuously measures the terminal block temperature and applies the appropriate offset correction in hardware before the data is presented to the backplane. The controller reads calibrated engineering-unit values directly from the input image table — no ladder-logic scaling is required for standard thermocouple types. Open-wire detection is implemented as a hardware pull-up circuit; a broken sensor wire pulls the input to a defined out-of-range value that the controller can detect via the channel status bits in the module’s configuration/status file.
Sourcing & Quality Verification
- Origin: OEM production, Allen-Bradley / Rockwell Automation manufacturing facilities.
- Traceability: Each unit ships with original Rockwell Automation product label intact, including date code and serial number.
- Inspection Protocol: Visual inspection of housing, terminal block, bus connector, and label authenticity prior to dispatch.
- Packaging: Original anti-static bag and OEM carton where available; otherwise ESD-safe repackaging with foam insert.
- Warranty: 12-month Konmask operational warranty against manufacturing defects.
- Counterfeit Risk Mitigation: Konmask sources exclusively from authorized distributors and verified industrial surplus channels — not from unverified online marketplaces.
Procurement Process
- Confirm Compatibility: Verify your CompactLogix or MicroLogix 1500 controller firmware revision supports the 1769-IT6 (RSLogix 5000 v16+ / Studio 5000 v21+ recommended).
- Request a Quote: Contact support@konmask.com for volume pricing, lead time confirmation, and export documentation if required.
- Place Order: Add to cart and complete checkout, or submit a purchase order via email for net-terms arrangements.
- Shipping: Standard DHL/FedEx international express (3–7 business days); expedited options available on request.
- Receiving Inspection: Verify label, date code, and physical condition upon receipt. Contact us within 5 business days for any discrepancy claims.
Technical FAQ
- Q: Can the 1769-IT6 be used with a MicroLogix 1100 or 1400?
- A: No. The 1769 compact I/O bus is only supported by MicroLogix 1500 (with the 1769-L20 or L30 processor) and CompactLogix controllers. MicroLogix 1100/1400 use a different I/O expansion bus.
- Q: How many 1769-IT6 modules can I install in a single CompactLogix system?
- A: The maximum number depends on the controller’s I/O module limit and backplane current budget. Consult the 1769 Compact I/O Selection Guide (Rockwell Publication 1769-SG001) for your specific controller.
- Q: Does the module support HART or Foundation Fieldbus?
- A: No. The 1769-IT6 is a direct-wired thermocouple/mV input module and does not support digital fieldbus protocols. For HART-enabled temperature transmitters, consider the 1769-IF4 or a dedicated HART multiplexer.
- Q: What is the maximum cable length for thermocouple wiring?
- A: Rockwell recommends using thermocouple extension wire (not copper) matched to the thermocouple type, with a practical limit of approximately 30 m for standard installations. Longer runs require shielded extension cable and careful attention to common-mode noise.
- Q: Is a firmware update required after installation?
- A: The 1769-IT6 is a non-intelligent module with no field-upgradeable firmware. Configuration is handled entirely by the controller’s I/O configuration tree in Studio 5000 / RSLogix 5000.
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