With the Type 4329 Network Communication Module (NCM) installed, Tricon can communicate with other Tricons and external hosts to terminate Ethernet (802.3) networks. Nonconforming products support many Triconex proprietary protocols and applications as user-written applications, including those using the TSAA protocol. NCMG module has the same function as NCM to be able to synchronize time based on time GPS system. See the Tricon Communication Guide for more information.
NCM provides two BNC connectors as ports :NET 1 supports peer to peer and time synchronization protocols for secure network composition Tricons. NET 2 supports networking to external systems using Triconex applications, such as trstation, SOE, OPC Server, and DDE servers, or user-written applications. see”Communications Capabilities” opens to page 59 to learn more about the Triconex protocol and applications.

Two NTMS can reside in a logical slot, but they work independently and do not function as hot spare modules. The external host can read or only write data to the Tricon variable which alias numbers are assigned. (See “Enhanced Intelligence,” “Communication Modules,” page 27 for more information on aliases.) NCM is compatible with IEEE Standard 802.3 electrical interface and operation at 10 megabits per second. Nonconforming products are connected to the external mainframe computer via coaxial cable (RG58) typically up to 607 ft (185 ft) m). Distances up to 2.5 miles (4,000 m) are available with Repeaters and standard (thick mesh or fiber optic cable). The master processor typically refreshes the data with each scan on the NCM.