SYSTEM SUMMARY
The following is a brief description of the standard modules that comprise a typical terminal. For
detaileddescriptions,schematicsandparts lists,refertotheindividualmodule’ssection inthismanual,
Sections 9 through 17.
MICROPROCESSOR MODULE: This module, located behind the Display module, controls all of the
functions of the PDR-2000. The Microprocessor module (uP module) monitors and controls all Trip
inputs and outputs and system status. All event recording, communications and programming are
also controlled by the uP module. The Display module is directly connected to the uP module. A
proprietarysoft-core processorresidingin anAlteraFPGAandFLASHmemoryarethemaincomponents
that run the module. A real time clock with battery backup is also on this module. The PDR-2000
requires one uP module, but an optional second module can be installed for redundancy.
DISPLAYMODULE: The Display module ismade upof a 4X 20 characterVacuum Florescent Display
(VFD)and a fourteen key keypad. Thekeypad has fourfunction keysand ten alphanumerickeys. The
VFD is used to display Channel status, time and in conjunction with the keypad can be used to
programtheunit, perform tests and view events. TheVFD and keypad areconnected directly to theuP
modulevia ribbon cables. This module ishinged onthe left andswings outof the wayto accessthe uP
module(s) and the Communications module.
COMMUNICATIONSMODULE: Locatedbehindthe Displaymoduleandto therightofthe uPmodule(s),
this card converts the communications coming from the uP module to the format used in the system,
i.e.RS-422,G.703,fiber optic or audio. The COM module(Communications module) differsdepending
on the type of communications supplied with the unit.
RS-232 MODULE (Data module): The RS-232 module contains two main circuits. The first contains
the RS-232 circuits for the front (DCE) and rear (DTE) RS-232 communication ports and electrically
isolates them from the uP module. The second contains the IRIG-B circuitry that coverts the GPS
clock input for the uP module. This module may be replaced for optional protocols.
DC/DC MODULE: The standard redundant DC module converts, handles, and monitors the power in
the PDR-2000. External power coming into the unit is fused and passed into the DC convertors
located on the board and is fused again coming out of the DC convertors. Power is then distributed
throughout the rest of the unit. The power is also monitored and is clamped if it goes high and then
reset. The module is capable of handling up to two DC inputs that can be the same or different
voltages. The DC module has two status relays whose contacts close in case of power failure.
STATUS RELAY MODULE: This module contains eight form A/B relays and LED indicators on the
frontpanel. Conditionsthat will result in an alarminclude: a uP modulefailure, loss of communications,
masteralarm, unitidentificationdisabled, orcommunicationblock. Twooutputsmayalsobe programmed
to indicate one of seven events, Trip In, Trip Out, invalid Unit ID received, loss of communication of
indirectlyconnectedunits,biterrorsoneitherComport,or a Ping test failure that can indicate excessive
propagationdelay.
TRIP IN MODULE: Up to eight trips can be input into the PDR-2000, these are handled by the Trip In
module. Thismodulecontains optical isolators and communicates detected trips withthe uP module.
TRIP OUT MODULE: The Trip Out module has eight optically isolated solid state Trip output circuits.
Trip outputs can be programmed by the uPmodule. The Trip Out module can also be used to drive up
to 8 optional dry contact relays. A redundant Trip Out module is available that increases the total Trip
out circuits to sixteen.
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