The 1797-BCNR ControlNet redundant barrier module is part of the Flex Ex I/O product series by Allen-Bradley and it has multiple functions for advanced diagnostics that provide real-time status updates in order to eliminate errors and solve problems with ease and in the shortest possible time period. The 1797 Bulletin module is designed to be mounted close to equipment that is being controlled, which eliminates the need for a large number of long cables that are unable to be folded. The 1797-BCNR module has an onboard ControlNet communication port and a maximum of 5 Megabits per second of communication port speed or transmission rate. The transmission attenuation of the module is at -7.84 decibels while the ControlNet Ex system operates on a 7 Volts power source.

This module can be set with several different configurations and that enables the users to utilize its functionalities for various applications. The protective features of the module enable the module to be replaced while the system is fully operating and under power. This kind of procedure can be carried out while the system is placed in hazardous areas where stopping system operation can cause significant issues. In regard to operation and mounting in hazardous locations, the module is rated according to Class I, II, and II / Division 1, Zone 1 and 22 regulations. In addition to that, the 1797-BCNR redundant barrier module has a built-in galvanic isolation that erases the need for IS barriers or isolators. The 1797-BCNR module does not require a separate power supply and it operates at maximum temperatures of 70 degrees Celsius (158 degrees Fahrenheit) and minimum temperatures of -20 degrees Celsius (-4 degrees Fahrenheit). The storage temperature of the 1797-BCNR module ranges from -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit). The non-condensing relative humidity of the module’s working environment is 95%. Thanks to the FLEX Ex conformal coating, the module’s metal parts are protected from corrosion. This product from the 1797 series weighs only 200 grams (0.44 pounds).