DeltaV Series 2 I/O cards have a wider operating temperature range than pre-Series 2 cards and some Series 2 cards support redundancy.
The following DeltaV I/O cards are available as Series 2:
Series 2 redundant capable cards are configured, autosensed, upgraded, and operated just like pre-Series 2 cards. Series 2 cards in Simplex mode can function as drop-in replacements for pre-Series 2 cards of the same type. With the exception of the Simplex mode Series 2 H1 card, which requires the Series 2 H1 terminal block, no wiring change is required to replace a pre-Series 2 card. Series 2 cards report their operating mode (simplex or redundant) to the DeltaV controller based on the type of terminal block on which they are installed. Redundant terminal blocks provide wiring terminations for the redundant cards. If a card is installed on a redundant terminal block, it reports itself as operating in Redundant mode; otherwise, it reports itself as operating in Simplex mode.
Other than redundant terminal blocks, no additional software or hardware is required to support redundancy. A redundant terminal block spans two adjacent slots on the carrier. A redundant I/O card consists of two Series 2 cards installed in a redundant terminal block.
For redundant I/O, the lower slot number (in the carrier) in a redundant pair must be odd and the upper slot number must be the next higher even number. For example, redundant pairs can be installed in slots 1 and 2, 3 and 4, 9 and 10. Redundant pairs cannot be installed in slots 6 and 7, 24 and 25. Configuration tools such as the DeltaV Explorer enforce this requirement.
The double-wide redundant terminal blocks require only a single set of wires for each redundant channel or fieldbus segment. (The exception is the Redundant Interface terminal block which uses two sets of wires for the Series 2 Serial card. One set of wires is used for each interface such as a computer.) The redundant terminal blocks contain screw terminals appropriate for the card type and signals from the screw terminals are connected to both cards in a redundant pair.
If all cards are redundant, the controller can support up to 32 redundant pairs. Refer to DeltaV Books Online for more information on using Series 2 cards in a DeltaV system.