OVERVIEW
WBPEEUI250016A1
1 - 1
SECTION 1 - INTRODUCTION
OVERVIEW
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.
INTENDED USER
Personnel installing, operating or maintaining the process con-
trol unit interface should read this instruction before perform-
ing any installation, operation or maintenance procedures.
Installation requires an engineer or technician with experience
handling electronic circuitry and who is familiar with commu-
nication networks.
PROCESS CONTROL UNIT INTERFACE DESCRIPTION
The process control unit interface is made up of the INNIS01
Network Interface Slave Module (NIS) and INNPM11 Network
Processing Module (NPM). Through this 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 (refer to Figure
). 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 com-
munication capability is a standard feature.
INNIS01 NETWORK INTERFACE SLAVE MODULE
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 con-
tains 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.
