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1.2. Series 8 I/O Overview This document provides technical information to configure the Series 8 I/O. The following Series 8 I/O items are included in this document. • TC/RTD • Analog Input – Single Ended • Analog Input with HART – Single Ended • Analog Input with HART – Differential • Analog Output • Analog Output with HART • Digital Input Sequence of Events (SOE) • Digital Input, 24 VDC • Digital Input Pulse Accumulation • Digital Output, 24 VDC • DO Relay Extension Board Definitions • Input Output Termination Assembly (IOTA): An assembly that holds the IOM and the connections for field wiring; • Input Output Module (IOM): A device that contains most of the electronics required to perform a specific I/O function. The IOM plugs onto the IOTA. Features All Series 8 components feature an innovative design that supports enhanced heat management. This unique look provides significant reduction in overall size for the equivalent function. The unique features of Series 8 I/O include: • I/O Module and field terminations are combined in the same area. The I/O Module is plugged into the IOTA to eliminate the need for a separate chassis to hold the electronics assemblies • Two level “detachable” terminals for landing the field wiring in the enclosure, providing easier plant installation and maintenance. • Field power is supplied through the IOTA, with no need for extra power supplies to power the field devices and the associated craft wired marshalling • Redundancy is accomplished directly on the IOTA without any external cabling or redundancy control devices, by simply adding a second IOM to an IOTA • For both IOM and IOTA, coated (module numbers starting with 8C) and uncoated (module numbers starting with 8U) options are provided. Conformal coating material is applied to electronic circuitry to act as protection against moisture, dust, chemicals, and temperature extremes. Coated IOM and IOTA are recommended when electronics must withstand harsh environments and added protection is necessary.