Two-wire process variable indicator with microencapsulated electrophoretic display

摘要

A two-wire process variable indicator includes a housing having a plurality of terminals disposed therein. The terminals are coupleable to a two-wire process control loop. A power module is coupled to the plurality of terminals to receive current flow from the process control loop. Driver circuitry is coupled to the power module and a microencapsulated electrophoretic display is coupled to the driver circuitry.

主权项

1. A two-wire process variable indicator comprising:
a housing; a plurality of terminals disposed within the housing and being coupleable to a two-wire process control loop which carries at least one of an analog and a digital signal representative of information related to a process variable wherein the terminals are configured to receive the information from the two-wire process control loop related to the process variable; a power module coupled to the plurality of terminals to receive current flow from the process control loop; driver circuitry coupled to the power module; and a microencapsulated electrophoretic display coupled to the driver circuitry and configured to display information related to the process variable received from two-wire process control loop; wherein the driver circuitry and the microencapsulated electrophoretic display are wholly powered with power from the two-wire process control loop.