Allen-Bradley 1769-CJC Cold Junction Compensation Sensor,CompactLogix,Used with The
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Request QuoteAllen-Bradley 1769-CJC — The Allen-Bradley 1769-CJC is the cold-junction-compensation (CJC) sensor used with the 1769-IT6 / 1769-IT6K thermocouple input modules and the CompactLogix 5370 L2 controllers with embedded thermocouple input. It provides the reference-junction temperature reading required to compute absolute thermocouple temperature. The CJC sensor attaches to the terminal block and is read automatically by the thermocouple module. CompactLogix 5370 L2 controllers (e.g., 1769-L24ER-QBFC1B) require the 1769-CJC when configuring the embedded thermocouple channels. Each thermocouple module needs one (or two per 1769-IT6 depending on wiring) 1769-CJC sensor.
| Family | Bulletin 1769 Compact I/O — Cold-Junction Compensation Sensor |
| Purpose | Reference-junction temperature for thermocouple absolute-temp calculation |
| Compatible Modules | 1769-IT6, 1769-IT6K, CompactLogix 5370 L2 embedded thermocouple channels |
| Required Per Module | 1 or 2 (depending on terminal-block wiring) |
| Mounting | Attaches to the terminal block |
| Read by | Thermocouple module or L2 controller automatically |
Description
Allen-Bradley 1769-CJC
The Allen-Bradley 1769-CJC is the cold-junction-compensation (CJC) sensor used with the 1769-IT6 / 1769-IT6K thermocouple input modules and the CompactLogix 5370 L2 controllers with embedded thermocouple input. It provides the reference-junction temperature reading required to compute absolute thermocouple temperature. The CJC sensor attaches to the terminal block and is read automatically by the thermocouple module. CompactLogix 5370 L2 controllers (e.g., 1769-L24ER-QBFC1B) require the 1769-CJC when configuring the embedded thermocouple channels. Each thermocouple module needs one (or two per 1769-IT6 depending on wiring) 1769-CJC sensor.
| Module Overview | |
|---|---|
| Catalog Number | 1769-CJC |
| Product Family | Bulletin 1769 Compact I/O — Cold-Junction Compensation Sensor |
| Description | Cold-Junction Compensation Sensor for 1769 Thermocouple Modules |
| Purpose | Reference-junction temperature for thermocouple absolute-temp calculation |
| Compatible Modules | 1769-IT6, 1769-IT6K, CompactLogix 5370 L2 embedded thermocouple channels |
| Required Per Module | 1 or 2 (depending on terminal-block wiring) |
| Specifications | |
|---|---|
| Family | Bulletin 1769 Compact I/O — Cold-Junction Compensation Sensor |
| Purpose | Reference-junction temperature for thermocouple absolute-temp calculation |
| Compatible Modules | 1769-IT6, 1769-IT6K, CompactLogix 5370 L2 embedded thermocouple channels |
| Required Per Module | 1 or 2 (depending on terminal-block wiring) |
| Mounting | Attaches to the terminal block |
| Read by | Thermocouple module or L2 controller automatically |
| Compatibility | |
|---|---|
| Compatible Controllers | CompactLogix 5370 (1769-L1x, L2x, L3x), MicroLogix 1500, via 1769-AENTR / 1769-ADN / 1769-SDN adapter |
| Bank Position | Any 1769 I/O slot |
| Placement Rules | Each bank must have its own 1769-PA2 / 1769-PB2 / 1769-PA4 / 1769-PB4 power supply |
| Conformal Coating / Environmental | |
|---|---|
| Environmental Protection | Polymer conformal coat on PCB for humidity, salt spray, dust, and mildly corrosive atmospheres |
| Target Environments | Marine, mining, oil-and-gas, pulp-and-paper, chemical, food-and-beverage wash-down |
| Electrical Identity to Base | See base family doc |
| Operating Temperature | 0…60 °C (32…140 °F) |
| Certifications | |
|---|---|
| c-UL-us | UL Listed Industrial Control Equipment |
| CE | EN 61131-2 Programmable Controllers, EN 61326-1 EMC |
| Hazardous Location | Class I Div 2 Groups A/B/C/D (where marked) |
| RCM / KC / EAC | Yes |
| CompactLogix 5370 / Compact I/O Platform Features | |
|---|---|
| Form Factor | Bank-based Compact I/O — modules clip together on a shared backplane bus, mounted on panel or DIN rail |
| Controller Compatibility | CompactLogix 5370 (1769-L3x), MicroLogix 1500 (Series B), legacy CompactLogix 1768-L4x |
| Network Interface | EtherNet/IP (1769-AENTR, -AENTRK), DeviceNet, ControlNet via 1769-SDN / -L35CR controllers |
| Removal & Insertion Under Power (RIUP) | RIUP supported on most 1769 I/O modules — check the module-specific user manual for exceptions |
| Bank Segmentation | Each bank is limited to 8 modules + end cap; distance between banks controlled by 1769-CRL1/CRL3/CRR1/CRR3 expansion cables |
| Power Supply Options | 1769-PA2/PA4 (AC input), -PB2/PB4 (DC input) — size based on 5V and 24V backplane current draw of all modules in the bank |
| Conformal Coating Option | "K" suffix — IPC-CC-830 Class 3 conformal coating for harsh environments |
| Studio 5000 Integration | Native AOPs in Studio 5000 Logix Designer; drop-in add/replace on the I/O tree |
| Environmental Specifications | |
|---|---|
| Operating Temperature | 0…+60 °C (32…+140 °F) — standard industrial range per IEC 61131-2 |
| Storage Temperature | -40…+85 °C (-40…+185 °F) |
| Relative Humidity | 5…95% non-condensing per IEC 60068-2-30 |
| Vibration (Operating) | 2 g @ 10…500 Hz per IEC 60068-2-6 (Test Fc) |
| Shock (Operating) | 30 g per IEC 60068-2-27 (Test Ea) |
| Shock (Non-operating) | 50 g per IEC 60068-2-27 |
| ESD Immunity | 6 kV contact / 8 kV air discharge per IEC 61000-4-2 |
| Radiated RF Immunity | 10V/m, 80…6000 MHz per IEC 61000-4-3 |
| EFT / Burst Immunity | ±4 kV @ 5 kHz on power ports; ±2 kV @ 5 kHz on signal ports per IEC 61000-4-4 |
| Surge Transient Immunity | ±1 kV line-line, ±2 kV line-earth per IEC 61000-4-5 |
| Conducted RF Immunity | 10V rms, 150 kHz…80 MHz per IEC 61000-4-6 |
| Emissions | CISPR 11 Group 1 Class A; IEC 61000-6-4 (industrial environment) |
| Pollution Degree | 2 (standard industrial) |
| Enclosure Type Rating | None (open-style) — install in a suitable industrial enclosure (IP54/NEMA 12 or better) |
| Certifications & Standards | |
|---|---|
| c-UL-us (UL Listed) | UL Listed Industrial Control Equipment for US and Canada |
| c-UL-us (Hazardous Locations) | UL Listed for Class I Division 2, Group A/B/C/D (where module-certified) |
| CE Marked — EMC Directive | 2014/30/EU — EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2 |
| CE Marked — Low Voltage Directive | 2014/35/EU — EN 61131-2 (Programmable Controllers Clause 11) |
| CE Marked — RoHS Directive | 2011/65/EU — EN IEC 63000 |
| UKCA Conformity Assessment | UK Statutory Instrument 2016 No. 1091 (EMC), No. 1101 (LVD), 2012 No. 3032 (RoHS) |
| ATEX (Explosive Atmospheres) | 2014/34/EU — EN IEC 60079-0, EN IEC 60079-7 Protection "e" II 3G Ex ec IIC T4 Gc (where module-certified) |
| IECEx | IEC 60079-0, IEC 60079-7 Protection "e" II 3G Ex ec IIC T4 Gc (where module-certified) |
| RCM (Australia) | Australian Radiocommunications Act — AS/NZS CISPR 11, Industrial Emissions |
| KC (Korea) | Korean Registration of Broadcasting and Communications Equipment |
| Morocco | Arrêté ministériel n° 6404-15 |
| CCC (China) | CNCA-C23-01 Explosion-Proof Electrical Products (where applicable) |
Related Technical Topics
- Bank Sizing & Power Supply — Each 1769 bank supports up to 8 I/O modules plus the end cap (1769-ECR/ECL). Total 5V and 24V backplane current must not exceed the power supply rating. Consult the module datasheet for each entry’s current draw; add 10% margin.
- End Cap Placement — The right-most module in every bank must be followed by a 1769-ECR end cap (or 1769-ECL on the left of the leftmost bank). End caps terminate the backplane — without them, the controller will fault on power-up.
- Bank-to-Bank Expansion Cables — Use 1769-CRL1 (305 mm / 1 ft) or 1769-CRL3 (914 mm / 3 ft) cables to extend the backplane between banks. Max system = 3 banks (controller + 2 expansion), or 2 banks for MicroLogix 1500.
- Distance from Controller — The first bank contains the CompactLogix controller; expansion banks attach to its right. Keep backplane cable runs short and away from high-voltage wiring to preserve signal integrity.
Source: Module-specific specifications are compiled from Rockwell Automation Publication 1769-TD006I-EN-P — CompactLogix 5370 / Compact I/O Technical Data (March 2024) together with the module’s individual product specification sheet. Platform features describe the CompactLogix 5370 / Compact I/O architecture; environmental specifications reflect the standard industrial operating envelope per IEC 61131-2; certifications listed are the standard Allen-Bradley marking stack — consult the module-specific datasheet for certification file numbers. Rockwell Automation Publication 1769-TD006 — 1769 Compact I/O Modules Specifications Technical Data; CompactLogix Controllers Specifications (1769-TD005, 1769-TD007).
Disclaimer: PLC Exchange is an independent reseller and is not an authorized distributor, affiliate, licensee, partner, or agent of Allen-Bradley / Rockwell Automation. All product information on this page is compiled from publicly-available manufacturer publications, technical data sheets, and catalog sources, each of which remains the copyright of its originating manufacturer. We make no representation or warranty, express or implied, regarding the accuracy, completeness, timeliness, or fitness for any particular purpose of the specifications or descriptions shown — content may contain errors, omissions, or out-of-date information. Product images are the property of their respective manufacturers, trademark owners, and source publications, and are displayed solely for identification purposes under the nominative fair use doctrine; images are representative and may depict a different configuration or catalog variant than the exact product listed. Purchasers should independently verify specifications against the current manufacturer publication before placing an order. All product names, trademarks, service marks, and registered trademarks are the property of their respective owners, and their use does not imply endorsement or affiliation.
Technical Notes for 1769-CJC
- Refer to the manufacturer's installation instructions for proper mounting, wiring, and configuration.
- Ensure compatibility with your existing system architecture before ordering.
- All 1769-CJC units sold by PLC Exchange are tested and ship in original factory packaging.
- For application-specific questions or system compatibility verification, contact PLC Exchange technical support at [email protected] or 980-202-0882.
Alternative Part Numbers & Names for 1769-CJC
The 1769-CJC by Allen-Bradley may also be found under the following alternative names, catalog numbers, or common search variations:
- 1769CJC
- Allen Bradley 1769-CJC
- Allen-Bradley 1769-CJC
- 1769 CJC
- 1769/CJC
- CompactLogix 1769-CJC
All variations refer to the same Allen-Bradley product. If you are unsure whether this is the correct part for your application, contact our team for assistance.
Additional information
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 12 × 10 × 6 in |
| warranty | 2.5 Year PLC Exchange Warranty, 30 Days worry-free return from delivery |
| upc | 886739976263 |
| mpn | 1769-CJC |
| manufacturer | Allen-Bradley |
| condition | Original Packaging |
Dimensions & Weight for 1769-CJC
| Shipping Dimensions | |
|---|---|
| Weight | 0.5 lbs |
| Length | 12 in |
| Width | 10 in |
| Height | 6 in |
| Box Dimensions (L×W×H) | 12 × 10 × 6 in |
Dimensions shown are for the shipping package. For module-level mechanical dimensions, refer to the manufacturer datasheet.
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Frequently Asked Questions
Where can I find the technical datasheet for the 1769-CJC?
The official manufacturer datasheet is available for download on the 1769-CJC product page at PLC Exchange. Look for the Tech Data PDF link in the product description.
Does the 1769-CJC include a warranty?
Yes. Every 1769-CJC sold by PLC Exchange includes a 2.5-year warranty (30 months, full replacement). Details: https://plcexchange.net/warranty-information/
What is the return policy for the 1769-CJC?
PLC Exchange offers a 30-day worry-free return policy. Eligibility and details: https://plcexchange.net/return-policy/
When will my 1769-CJC ship?
In-stock orders placed before 4 PM ET ship the same business day via free UPS Ground. Expedited options (Next Day Air, 2nd Day Air) are available at checkout.
Who manufactures the 1769-CJC?
The 1769-CJC is manufactured by Allen-Bradley. PLC Exchange is an independent reseller specializing in Allen-Bradley industrial automation products.
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