Two wire process variable indicator with microencapsulated electrophoretic display

摘要

A two wire process variable indicator (106 200) includes a housing (202) having a plurality of terminals disposed therein. The terminals (204 206) are coupleable to a two wire process control loop. A power module (202) is coupled to the plurality of terminals (204 206) to receive current flow from the process control loop. Driver circuitry (210) is coupled to the power module (202) and a microencapsulated electrophoretic display (109 212) is coupled to the driver circuitry (210).