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INTRODUCTION
FEATURES
I-E96-613A
1 - 3
a dedicated diagnostic port. The central INFI-NET IPT module
can use a variety of means to link to the remote satellite Plant
Loop IPT module such as a modem, microwave or transceiver.
The IPT module communicates directly with an NIS module
through the I/O expander bus.
The IPT module is a single printed circuit board that occupies
one slot in the module mounting unit, adjacent to its NIS and
MPI module. Two captive latches on the IPT module faceplate
secure the module in the module mounting unit. The faceplate
contains 16 CPU LEDs, a red/green status LED, and a stop/
reset pushbutton.
The IPT module is terminated through a 60-pin ribbon cable
connected to the IMMPI01 module. Power and I/O expander
bus connections follow the same connector assignments com-
mon to most INFI 90 modules (P1 for power, P2 for I/O
expander bus). Connector P3 is unused at this time.
IMMPI01 Multi-Function Processor Interface Module
The IMMPI01 Multi-Function Processor Interface Module (MPI)
provides the INIPT02 INFI-NET to Plant Loop Transfer Module
(IPT) with two RS-232-C communication ports. The MPI mod-
ule is an interface device that handles I/O to and from the IPT
module. Control and data signals from the IPT module travel
through a 60-pin ribbon cable to the MPI module.
The MPI module connects to an NTMP01 Multi-Function Pro-
cessor Termination Unit, NIMP01 or NIMP02 Multi-Function
Processor Termination Module. Input and output signals enter
and leave the MPI circuit board connector P3 through an
NKTU01, NKTU02, NKTU11 or NKTU12 cable to the termina-
tion device.
FEATURES
The INFI-NET to Plant Loop remote interface has the following
features:
•
The IPR interface modules provide localized start-up/shut-
down on power failure without operator intervention.
•
Each node can operate independently of other nodes.
•
The IPR interface modules handle four message types:
Broadcast, time synchronization, multicast and NIS poll.
•
All messages contain cyclic redundancy check codes (CRC)
and checksums to insure data integrity.
•
The IPT module on the INFI-NET loop has full INFI-NET
communications diagnostics capability.