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3.6 Universal Input/Output Module-2 (UIO-2) Beginning with R432, a new Series C Universal Input/Output (UIO) module, the UIO-2, has been introduced. The UIO-2 not only supports all features and benefits offered by UIO, it also provides a few enhancements over the UIO. There are a few differences compared to the UIO too. The UIO-2, driven by hardware miniaturization has resulted in a new design with reduced overall IOM and IOTA dimensions. Available in both redundant and non-redundant versions, the UIO-2 has a reduced footprint in the cabinet and increased density of IO point count per cabinet. As the physical dimensions of the IOM and its IOTA are entirely different from the existing UIO, the UIO-2 is not a replacement for the UIO. The following sections provide a list of features of the UIO-2 and a list of significant differences between UIO-2 and UIO. 3.6.1 New and enhanced features of UIO-2 The UIO-2, in addition to providing all features provided by UIO, provides the following enhanced features beginning with R432: • Is a single board module with physical dimension: 8.5 mm x 14.5 mm x 16 mm (5.5 mm dia) [4 x 4.5 dia x 14 width x 17 height] • Dimensions of the redundant and non-redundant IOTAs are 12” and 9”, respectively • Provides one HART modem per I/O channel • Supports pulse counting on up to four of any of the 32 channels that are configured as DI • Supports DO ganging within the following eight channel number groups: 1 - 4, 5 - 8, 9 - 12, 13 - 16, 17 - 20, 21 - 24, 25 - 28, and 29 – 32. However, ganging across these groups is NOT possible. Beginning with Experion R500.1, the following additional enhancements have been provided : • Supports Sequence Of Events (SOE) functionality for digital input signals on all 32 channels • Supports 24 V NAMUR type input signals with current (Amps) levels in accordance with IEC 60947-5-6:1999 specifications.