PDR-2000 Digital Teleprotection Terminal


  • All Pilot Schemes
  • Easy to Program
  • 16 Bit Error Detection
  • Trip Time < 4msec
  • 12 Year Warranty
Large PDR-2000 Product Image
  • Overview
  • Applications
  • Modules
  • Specifications
  • Downloads


The PDR-2000 is an eight channel digital protective relaying terminal that provides high speed and high security tripping in protective schemes for electric power transmission and generation. The PDR-2000 communicates using serial digital communications, fiber optics, or a four wire audio connection.

The PDR-2000 is bundled with an array of innovative features aimed at providing the highest performance in both speed and security. Two independent communication ports allow the unit to simultaneously operate over two digital communication lines. Each digital packet generated by the PDR-2000 includes a Unit Identification (ID) number to increase security and prevent accidental tripping. Packet Forwarding allows a PDR-2000 to communicate with units that are not directly connected, as in a string or loop configuration.

Windows Based Graphical User Interface


The PDR-2000 can be programmed using the keypad on the front panel or by using our Windows based GUI (graphical user interface). Since no external programming equipment is required, field installation is easy.

Diagnostics & Testing

The PDR-2000 includes advanced diagnostics and testing tools including a fully featured event recorder. The event recorder can hold up to 40,000 events, after which the events are overwritten. Events are timed stamped by the internal clock which can be synchronized using an IRIG-B signal from a GPS clock. All events are stored in nonvolatile flash memory.

Events logs can be viewed using the keypad and display or the PDR-2000 GUI. The GUI allows the user to download up to 1,000 events and sort by event type, date and time. The keypad and display can also access events by starting with the most recent event and scrolling back chronologically.


Digital Transfer Trip Schemes

The PDR-2000 can be used in point to point configurations over one or two redundant com paths via Fiber Optics. If communicating through a digital network via a multiplexer or CSU/DSU, the PDR-2000 can communicate using G.703, RS-422, V.35 or C37.94.

Digital Transfer Trip

Audio Transfer Trip Schemes

The PDR-2000 can communicate a digital signal over any 4 wire voice grade audio circuit. The PDR-2000 can take advantage of the full 8 channel tripping capacity and increase security well beyond the ability of conventional FSK terminals.

Audio Transfer Trip

Three Terminal, String and Loop Configurations

The PDR-2000 is extremely well suited for three terminal, string, and ring configurations. Redundant communication ports allow the PDR-2000 to communicate over two different paths to two units simultaneously, eliminating the need for multiple single channel units at each location.

Three Terminal, String and Loop Configuration


Standard Modules

Microprocessor Module

The Microprocessor Module controls all the functions of the PDR-2000. The module has the interfaces and controllers for the Keypad and Display. It runs the software for the firmware and settings that control the operations of the entire chassis. The event recorder and Flash memory reside on this module as well. The uP module also generates and receives all digital communications, synchronous and asynchronous. The PDR-2000 is capable of running a primary uP module or primary and redundant uP modules simultaneously.

Communications  Module

The Com Module serves as the interface between the two communication ports located on the rear of the chassis and the Microprocessor Module. The Com module must match the Com ports. The RS-422 Com Module that communicates through a pair of RS-449 ports. This module is designed to interface with one or two 64 Kbps slots of a DS0 channel.

RS-232 Module

The RS-232 Module provides three important functions in the PDR-2000. First, it converts asynchronous communication packets of the uP module to the electrical RS-232 standards of the DCE port located on the front panel of the module and vice versa. Second, it converts asynchronous communication packets of the uP module to the electrical RS-232 standards of the DTE port located on the rear of the chassis and vice versa. Third, it converts the IRIG-B signal input from the BNC connector on the rear of the chassis to a digital format before passing the signal to the uP module.

DC/DC Module

The DC/DC Module comes standard with redundant power supplies. When operating normally, each power supply carries half of the load required by the unit. If either power supply fails, the remaining supply will compensate and continue to power the unit without interruption. A power supply failure is indicated by an LED on the front of the DC/DC Module and operation of the Power Fail Status Relay. Each power supply can convert a 24, 48, 125 or 250 VDC input to 5V. The two supplies can be ordered with the same or different voltages.

Status Relay Module

The Status Relay Module contains eight relays: (1) Alarm, (1) Block, (2) Loss of Communications, (2) programmable, (1) Microprocessor Fail, and (1) Unit ID Off. and eight relay driver circuits. The status relays drive external equipment when a change in system operation status is detected. Six of the relays are programmable for delay using the GUI or the keypad. All eight relays have jumpers to change the contact wiring from form A to form B.

Trip In Module

The Trip In Module contains eight optically isolated input circuits.

Trip Out Module

The Trip Out Module contains eight solid state relays for driving output circuits (devices) external to the unit or optional dry contact relays in the unit. Up to two Trip Out Modules can be installed in a chassis.

Option Modules

Universal Relay Module

The Universal Relay Module is an optional module for the PDR-2000. Each module contains up to four dry contact mechanical relays that can be used for Trip or Guard indications. Each relay is a form "C" relay with a contact rating of 10A @ 24VDC or 3A @ 125VDC.

Heavy Duty Relay Module

The Heavy Duty Relay Module is an optional module for the PDR-2000. Each module contains four dry contact relays that can be used for trip outputs. Each relay is a Form A. THe relays have a contact rating of 10A at 125VDC continours or 30A at 24VDC for less then 200ms.

Audio Communications Module

The Audio Communications Module communicates through terminal blocks to a 4 wire audio line with 600 ohm impedance. This module is used in applications where traditionally a FSK system would have been employed. The frequency range of the Audio Comm Module is 300 to 3300 Hz.

Cut-Out Switch Module

The Cut-Out Switch Module is used to provide an air gap isolation between the Trip inputs and outputs, and the terminal blocks on the back of the chassis. A contact on the switch also acts as a status relay and may be configured as normally open or normally closed.





  • Height: 5.25 in. (13.3 cm)
  • Width: 19 in. (48 cm)
  • Depth: 12.20 in. (31 cm)
  • Weight: 20 lb (9.1 kg) max.


-30°C to +70°C (-22°F to +158°F)


95% maximum @ +42°C (+108°F)


ANSI C37.90-1989
ANSI C37.90.1-1989
IEC 255-5
IEC 255-22-1
IEC 255-22-2
IEC 255-22-4


Screw type terminal blocks, 6-32, will accept lugged wires from 12 AWG to 20 AWG
IRIG-B connector, BNC
RS-232, 9 pin, DTE (rear)

Communication port modules:

  • RS-449, two 37 pin D-Sub
  • G.703, two 15 pin D-Sub
  • Fiber optic, FC or ST, multi or single mode 2TX & 2RX heads: 850 nm, 1300 nm, 1550 nm


ANSI C37.90.2 (35V / M)
IEC 255-22-3


24Vdc (18-36Vdc Input Range) < 21.60 W
48Vdc (36-75Vdc Input Range) < 19.20 W
125Vdc (73 - 158Vdc Input Range) < 16.86 W

Standard Modules


Programmable Settings

  • TX trip hold time, 0-40 ms
  • B Contact Key time, 0-1200 ms
  • RX trip hold time, 0-40 ms
  • Pre-trip timer, 0-40 ms
  • Guard before Trip, 0-1000 ms
  • Latching time, 0-500 ms
  • Status relay delay, 1-30 sec
  • Prog relay latch, 0-42 sec
  • Auto Ping/Timeout delay, 0-20 ms
  • Trip output logic
  • Unit ID
  • Packet Forwarding
  • Synchronous clocking

Event Recorder

  • 40,000 events before rewriting
  • Nonvolatile memory


  • Ping Test
  • Auto Ping Test
  • Programmable Status relays
  • Manual Trip generation


  • 40,000 events before rewriting
  • Nonvolatile memory

Event Recorder

  • 4KB
  • Nonvolatile memory

2 per chassis max, 2nd for redundancy


4 X 20 Vacuum Florescent Display (VFD)


RS-422 (64 Kbps) Fiber optic, long haul
Fiber optic, short haul (C37.94)
G.703 (56/64 Kbps)


IRIG-B modulated signal input
Impedance, 3.7 Kohm
Isolation transformer, 5 KV

Signal levels:

  • 1 = 3 V ( +1, -.5 V)
  • 0 = 1 V ( +.2, -1 V)

DCE, 9 pin connector


1 Alarm, programmable for delay
1 Block, programmable for delay
2 Loss of Communications, programmable for delay
2 Bit Error Rate, programmable for delay
2 Microprocessor Fail
Max contact voltage, 300 Vdc
Max contact rating, 10 A
Max break rating, 0.5 A @ 125 Vdc


8 Trip inputs, optically isolated
Current draw: 10 ma @125 Vdc


8 solid state Trip outputs, optically isolated
Max voltage, 300 Vdc

Contact rating:

  • 1 A, 2 A for 1 min
  • L2 per chassis max

2 per chassis max


Standard redundant supplies
Input Voltages: 24 Vdc, 48 Vdc, 125 Vdc, 250 Vdc
2 input fuses per DC input
1 output fuse per DC input
2 relays, power fail



4 Form A / B relays
Max voltage, 300 Vdc
Max contact rating, 10 A
Max break rating, 3 A @ 150 Vdc
2 per chassis max


4 Form A / B relays
Max voltage, 250 Vdc
Max contact rating, 30 A
Max break rating, 10 A @ 250 Vdc
2 per chassis max


Communication port modules:

  • All Trip outputs
  • Trip In module circuit
  • uP module Trip In shut-off command



PDR-2000 Manual (3.12 mb)

Firmware Revision History

PDR-2000 uP Firmware (26 kb)

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