GE PWB245A1142G1 Remote Annun. Diode Card

الوصف

The GE PWB245A1142G1 is a Remote Annunciator Diode Card. It is a specialized printed circuit board (PWB) used in industrial control and monitoring systems, specifically for the purpose of driving a remote annunciator panel.

Key Features and Functionality

The main purpose of this card is to manage signals sent to a remote annunciator, which is a visual and audible alarm panel that alerts operators to abnormal conditions. Its key functions include:

• Diode Isolation: The card uses diodes to isolate different alarm signals. This is critical to prevent a signal from one alarm point from back-feeding into other circuits. For example, if multiple alarms are wired to a single indicator light, the diodes ensure that the alarm signal from one source doesn’t energize the circuits of the others.
• Remote Annunciation: It serves as an interface between the main control system and a separate, remote annunciator panel. This allows operators to be alerted to alarms from a distance, such as in a control room, even if the main control cabinet is located elsewhere.
• Alarm Logic: The card handles the basic logic for annunciator functions, such as “first out” alarming (identifying the first alarm in a sequence of events) and alarm acknowledgment.
• Application: This type of card is commonly found in older GE control systems, often in power generation and industrial applications, where a physical, dedicated annunciator panel is used to display alarm states.