In most cases, DeltaV SIS will connect to either 4-20mA analog signal devices or discrete I/O devices rated up to 500mA per channel. Almost all the outputs will be De-energize-to-trip. However, there will be some output signals that require higher currents and some devices, mainly in fire and gas applications, that require energize-to-trip functionality. DeltaV SIS auxiliary components allows the DeltaV SIS platform to meet higher-current discrete output requirements while maintaining its field wiring monitoring and ensuring that the relay changes states correctly.
