TWO-WIRE LOOP PROCESS IO TRANSMITTER POWERED FROM THE TWO-WIRE LOOP

摘要

A two-wire process input-output ("IO") transmitter powered by a two- wire process loop and configured as a single transmitter. The transmitter including a gateway module (100) and at least one local IO module (200). The gateway module (100) including a first circuit configured to wholly power the gateway module from the two-wire process loop, a second circuit configured to communicate via the two-wire process loop, and a third circuit configured to communicate with the at least one IO module (200) via a local bus (700) separated from the two-wire process loop. The at least one local IO module (200) including a first circuit configured to wholly power the respective local IO module from the two-wire process loop, a second circuit to communicate at least with the gateway module via the local bus (700), and a third circuit configured to interface with at least one IO field device.