The DeltaV I/O subsystem supports multiple types of I/O cards including analog and discrete input and output cards, HART input and output cards, serial cards, Thermocouple mV, RTD, ohms and intrinsically safe analog and discrete input and output cards. Bus cards such as the Fieldbus H1, Profibus DP, AS-Interface, and DeviceNet are also supported. In addition, some of the Series 2 versions of the cards are available in Redundant mode for high-availability applications. The I/O subsystem consists of terminal blocks that snap onto the carrier to provide screw termination for field wiring and the I/O cards which snap over the terminal blocks and onto the carrier. The I/O cards convert field signals to the appropriate format for control and communications.
Up to 64 I/O cards are supported by a single I/O subsystem.
To simplify installation and ensure that the I/O interface is suitable for the plant environment, I/O terminal blocks have field wiring protection keys that correspond to keys on the I/O cards. The keys ensure that the I/O card and the I/O terminal block match; an I/O card plugs into an I/O terminal block only if the keys agree.
WARNING!Be sure that your I/O cards and terminal blocks are compatible before plugging in I/O cards. Card damage can result if an I/O card and terminal block are incompatible.