National Instruments 778618-01 Integrated Connector Block 

National Instruments part number 778618-01 is an identifying part number for the cFP-CB-3 Integrated Connector Block. This device is designed for use with the cFP-TC-120 module and CFP-BP-x Compact FieldPoint backplanes. In order to reduce heat gradients on the I/O terminals and improve the accuracy of the thermistor used for cold junction correction, it employs isothermal construction. The NI 778618-01 simplifies the creation of secure wiring configurations for applications involving high shock and vibration. NI field thermocouple modules address a wide range of temperature application needs. Users can cut the thermocouple cable to the desired length, ranging from 8.9 cm to 61 cm (3.5 in. to 24 in.), making them versatile for various temperature measurements. 

The flexibility of the 778618-01 reduces inventory costs and production downtime. The sensors are available with or without ground connections and can withstand temperatures up to 482°C (900°F). For applications using thermowell, optional springs reduce installation time and ensure proper contact with the thermowell. The device comes equipped with 36 screw terminals. The NI 778618-01 Connector Block features a security separation barrier between the I/O channels and the module communication bus, with no isolation between channels unless specified otherwise. 

Thermocouple output signals are typically in the millivolt range and have low voltage temperature sensitivity, requiring careful consideration of potential errors that can affect measurement accuracy. Common errors include CJC, gain and phase shift errors, noise, and thermocouple inaccuracies. The 778618-01has up to 36 terminals, which are wired using 16-26 AWG copper conductor wire with 6 mm (0.24 in.) of insulation stripped from the end. The V and C terminals have a maximum current rating of 4 A, while the other terminals are rated at 2 A.