NSBM01 Bailey Superloop Bus Module

The Bailey infi 90 INNPM11 Network Processing Module (NPM) / INNIS01 Network Interface Slave Module (NIS) and the INNPM11 Network Processing Module (NPM) make up a process control unit interface. This process control unit interface provides control modules in a process control unit with access to an INFI-NET communication system.

INFI-NET is a unidirectional, high-speed serial data highway shared by all INFI 90 OPEN nodes. INFI-NET provides sophisti- cated interfaces for data exchange. This process control unit interface is made up of state-of-the-art INFI 90 OPEN modules.

Through the NPM and NIS interface the process control unit has access to INFI-NET. At the same time the NPM module communicates with the control modules via the Controlway. The process control unit interface can support hardware redundancy. In a redundant configuration, there are two NIS modules and two NPM modules. One pair of modules is the primary. If the primary modules fail, the backup modules come on-line. Redundant data highway communication capability is a standard feature.

The NIS module is an I/O module that works in conjunction with the NPM module. This allows a node to communicate with any other node on the INFI-NET loop. The NIS module is a single printed circuit board that occupies one slot in the module mounting unit. The circuit board contains microprocessor based communication circuitry that enables it to interface with the NPM module. Two latching screws on the faceplate secure the NIS module to the module mounting unit. There are 16 LEDs on the faceplate that display error codes and event/error counts. The NIS module has three card edge connectors for external signals and power (P1, P2 and P3). Connector P1 connects to the module power source. Connector P2 connects the NIS module to the I/O expander bus to communicate with the NPM module. Serial communication to other nodes is through con- nector P3 using a cable connected to a termination unit or termination module. Communication between nodes is through coaxial or twinaxial cables that connect the termination units or modules on each node.

The NPM module acts as a translator between INFI-NET and Controlway. The NPM module holds the process control unit database and directs the communication process between the modules residing on Controlway and the NIS module. The NPM module is a single printed circuit board that occupies the slot adjacent to the NIS module in the module mounting unit. The circuit board contains microprocessor based communication circuitry that enables it to interface with the NIS module and all Controlway modules. Two latching screws on the NPM module faceplate secure the module in the module mounting unit. The faceplate contains eight CPU LEDs, a status LED, and a stop/reset pushbutton. The NPM module has three card edge connectors for external signals and power (P1, P2 and P3). Connector P1 connects to common (ground), +5 VDC power, and the Controlway. Connector P2 connects the NPM module to the NIS module. Connector P3 provides for communication between primary and backup process control unit interfaces. The NPM module communicates with the NIS module within its process control unit through the I/O expander bus.