• 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.
All Series C components feature an innovative design that supports enhanced heat management. This unique look
provides a significant reduction in overall size for the equivalent function.
The unique features of Series C 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 and the
associated craft wired marshalling.
• Redundancy is available directly on the IOTA without any external cabling or redundancy control
devices, by simply adding a second IOM to an IOTA.
• The Series C innovative styling is one of its unique features. This styling includes features to
facilitate the effective use of control hardware in a systems environment. These features include:
• Vertical mounting for more effective wiring since most field wiring applications require entry from the top or bottom of
the systems cabinet.
• An “information circle” for a quick visual cue to draw the Maintenance Technician’s eye to important status
information.
• “Tilted” design for effective heat management within the cabinet enclosure. Since Series C allows for a significant
increase in cabinet density, an effective heat management system is critical for high systems availability.
• Input and output circuits are protected from shorts to alleviate the need for in-line fusing, reducing installation and
maintenance costs.
