Input/Output Module (IOM) The IOM Series expansion I/O modules have integral RS-485 MS/TP communications and integrate into the web-based Metasys system. IOMs can serve in one of two capacities, depending on where they are installed in the Metasys system. When installed on the Sensor/ Actuator (SA) Bus of an Advanced Application Field Equipment Controller (FAC), Field Equipment Controller (FEC), or VAV Modular Assembly (VMA) controller, the IOM expands the point count of these controllers. When installed on the Field Controller (FC) Bus, IOMs can be used as I/O point multiplexors to support monitoring and control from a Network Automation Engine (SNE) or Network Control Engine (SNC). The point multiplexor can also be useful for sharing points between other field controllers on the FC Bus using peer-to-peer connectivity. Note: At Controller Configuration Tool (CCT) Release 10.1 and later, FACs, FECs, and VMAs can communicate by using either the BACnet or the N2 field bus networking protocol. The operation of the IOM Input/Output Module is not affected by the selection of the BACnet or the N2 protocol in the host controller. All IOM expansion modules are BACnet Testing Laboratory (BTL) listed and certified. Refer to Table 5 for details. Important: You cannot purchase a similar thirdparty device and install it in a UL/ULC Listed smoke control system. Doing so voids the UL/ULC Smoke Control Listing. Third-party devices must be provided and labeled by the factory as described in the UL/ULC Smoke Control Listing.

Important: Only those Johnson Controls products identified for use in smoke control applications have been tested and listed by UL for use in a Metasys System UL 864 10th Edition UUKL/ORD-C100-13 UUKLC Smoke Control System. Installation of a product that is not UL/ULC Listed and labeled for this application prevents the entire system from being UL/ULC Listed for smoke control. Application Documentation Refer to the Metasys System Field Equipment Controllers and Related Products Product Bulletin (LIT-12011042) for product application details. If the product fails to operate within its specifications, replace the product. For a replacement product, contact the nearest Johnson Controls® representative.