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Compact rectangular electronic module with M12 connectors and status LEDs, IP67 rated, 55 g

Turck

Turck BL67-2AI-TC 6827178 electronic module electrician tool

SKU CH-DR7Q-Z7NYX MPN BL67-2AI-TC

I/O module provides two analog thermocouple inputs with cold-junction compensation and IP67 protection

  • TypeTest Equipment
  • Item Count1 pack
  • Selling UnitBox
  • Parts3 Years
  • Labor1 Year
  • Two analog inputs accept thermocouples B, E, J, K, N, R, S, T
  • Cold-junction compensation via Pt1000 probe in a special connector
  • IP67 protection class suits harsh environments
  • Galvanic separation via optocouplers protects field-level electronics
  • Status and diagnostic LEDs simplify troubleshooting

Industrial temperature module

The Turck BL67-2AI-TC 6827178 is an I/O module that provides two analog inputs for thermocouple types B, E, J, K, N, R, S and T. It suits automation engineers who need reliable temperature acquisition across fieldbus networks such as CANopen, DeviceNet, EtherNet/IP, Modbus TCP, PROFIBUS-DP and PROFINET. Galvanic separation via optocouplers protects the electronics from field-level disturbances. The IP67 housing allows direct machine mounting without a separate enclosure.

Sealed operation from -40 °C to 70 °C

Rated IP67, the module resists dust and water ingress while operating across a -40 °C to 70 °C ambient range. Cold-junction compensation uses a Pt1000 probe in a dedicated connector to maintain measurement accuracy. Status and diagnostic LEDs give immediate visual feedback on channel health and communication state. The compact 55 g unit connects via M12 signal interfaces for quick installation.

Stable accuracy under continuous load

Galvanic isolation prevents ground loops during long-term operation, keeping temperature readings consistent over extended shifts. The optocoupler barrier protects internal circuitry from sustained electrical noise on the field side. Cold-junction compensation remains effective without drift, supporting reliable thermocouple conversion throughout production cycles. The module maintains fieldbus communication integrity under constant data exchange.

Highlights

  • Two analog inputs accept thermocouples B, E, J, K, N, R, S, T
  • Cold-junction compensation via Pt1000 probe in a special connector
  • IP67 protection class suits harsh environments
  • Galvanic separation via optocouplers protects field-level electronics
  • Status and diagnostic LEDs simplify troubleshooting

Specifications

BrandTURCK
ModelBL67-2AI-TC 6827178
TypeTest Equipment
Item Count1 pack
Selling UnitBox
Parts3 Years
Labor1 Year

Questions about this item

How do I mount the BL67-2AI-TC module and connect the thermocouple cold-junction probe?

Snap the module onto a BL67 base rail, then plug the special M12 connector that contains the Pt1000 cold-junction probe; the probe must sit in that connector for accurate temperature reference.

What part will need replacement first during long-term operation?

The Pt1000 cold-junction probe inside the M12 connector can drift over time and should be recalibrated or swapped if temperature readings shift.

At what ambient temperature does the module reach its operating limit?

The unit is rated for continuous use up to 70 °C; sustained exposure above that temperature will cause it to exceed its specified thermal envelope.

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