DS3800HPRB1A1A - Pulse Rate Input Board

SPECIFICATIONS

Part No.: DS3800HPRB1A1A
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Product Type: Pulse Rate Input Board
Availability: In Stock
Series: Mark IV

Functional Description

DS3800HPRB1A1A is a Pulse Rate Input Board developed by GE. It is a part of the Mark IV control system. It is essential for measuring and interpreting pulse signals, which often represent various metrics such as speed, flow rate, or position. Designed to process digital pulse inputs. Compatible with signals from encoders, flow meters, proximity sensors, and other pulse-generating devices.

Features

• Physical Configuration:
  • Equipped with a modular connector on one end, secured by retention levers to ensure stable installation.
  • Includes 12 jumpers and a trimmer resistor for configuration flexibility.
  • The trimmer resistor can be adjusted using a screw accessible on the top of the device.
• Integrated Components:
  • Programmable Interrupt Controller: Handles interrupt signals for timing and task prioritization.
  • Programmable Interval Timer Devices: Manages precise time intervals for system operations.
  • Both components are not field-programmable and are configured during assembly.

Synchronizing Functionality

The board is part of the Synchronizing Interface Module, a critical subsystem responsible for breaker synchronization. When the control system calculates the optimal time to close a breaker, the HPRB board sends logic outputs to energize the breaker closure relay (denoted as 25). This process involves:

• Relay Driver Circuit Voting: A 2 out of 3 voting mechanism ensures reliability by generating outputs POSKl and NEGKl to drive the relay coil.
• Diagnostic Monitoring: Three diagnostic circuits monitor the relay driver's health:
  
  • DIAG1: Signals true when relay contacts are closed.
  • DIAG2: Signals true when NEGKl exceeds +6.2V.
  • DIAG3: Signals true when POSKl is below +20V.

Diagnostic and Troubleshooting

A diagnostic alarm is triggered if there’s a mismatch between the T input and inputs from RI and IS. Common causes for discrepancies include:

• A failure in the pulse rate-to-digital card (HPRB).
• A defective magnetic pick-up sensor.

Troubleshooting Steps

• Observe the pulse rate input signal at the terminal board on the analog I/O module (AI03).
• If the magnetic pick-up is functioning correctly, the HPRB card is likely the source of the issue.
• This robust diagnostic capability ensures that any faults in the synchronization process are promptly identified, minimizing downtime and maintaining the reliability of the Mark IV control system.

The WOC team is always available to help you with your Mark IV requirements. For more information, please contact WOC.

Frequently Asked Questions

What is DS3800HPRB1A1A?
It is a Pulse Rate Input Board developed by GE under the Mark IV series.

Is the Board field-programmable?
No, the programmable interrupt controller and interval timer devices are pre-configured during manufacturing and cannot be field-programmed. Only the trimmer resistor can be adjusted before installation.

What diagnostic features are included?
DIAG1 True when relay contacts are closed.DIAG2 True when NEGKl voltage exceeds +6.2V. DIAG3 True when POSKl voltage is less than +20V. These diagnostics help detect synchronization issues and hardware malfunctions.

How can synchronization issues be resolved?
Inspect the pulse rate input signal at the analog I/O module (AI03). Test the magnetic pick-up sensor. If the sensor is operational, check the HPRB card for potential issues.