Customization of process variable transmitters with hermetically sealed EMI protection electronics

A process variable transmitter (102) includes a process variable sensor (110), and an electromagnetic interference (EMI) protection circuit (182) coupled to the process variable sensor (110). The process variable transmitter (102) also includes an airtight module (104C) enclosing the EMI protection circuit (182), and an electrical connector (132A, 134A, 136A) coupled to the EMI protection circuit (182) within the airtight module (104C). The EMI protection circuit can be configured from outside the hermetic module (104C) via the electrical connectors (132A, 134A, 136A) to interconnect electronic components of the EMI protection circuit (182) in one of two configurations, e.g., to provide or not provide transient protection. 一种过程变量变送器(102)包括过程变量传感器(110)，以及耦合到过程变量传感器(110)的电磁干扰(EMI)保护电路(182)。过程变量变送器(102)还包括封闭EMI保护电路(182)的气密模块(104C)，以及耦合到气密模块(104C)内的EMI保护电路(182)的电连接器(132A、134A、136A)。EMI保护电路能够经由电连接器(132A、134A、136A)从气密模块(104C)外部进行配置，以便以两种配置之一互连EMI保护电路(182)的电子部件，例如以提供或不提供瞬态保护。