IC3600VANB1 - Annunciator Control Card

IC3600VANB1 - Annunciator Control Card IC3600VANB1 - Annunciator Control Card

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Part No: IC3600VANB1
Manufacturer: General Electric
Function: Annunciator Control Card
Series: Mark I and II
Repair: 3-7 Day
Availability: In Stock
Country of Manufacturer: United States (USA)

Functional Description

IC3600VANB1 is a Annunciator Control Card developed by GE. It is a part of Mark I and II control system. It is designed to manage and convey information about system states, alarms, and anomalies through signals. They are tasked with processing input signals from various sensors, detectors, or other monitoring devices, and then generating corresponding output signals for display and alerting purposes. These cards are designed to seamlessly integrate into the broader control system architecture. They often feature standardized communication interfaces, making them compatible with various control systems and protocols.


  • The VANB card control signals that are sent to the VANA card. Additionally, it houses the driver for relay 30X, a pivotal component whose contacts are responsible for driving the alarm bell. It also produces a flashing signal, known as FL, which is transmitted to all VANA cards and is continuously available for use.
  • To better understand the functioning of this annunciator control card, it's helpful to visualize the signal flow in a typical condition. Assuming there are no alarm conditions, the output AHD of the VANB card will be set to 1. This serves as a flashing permissive signal to all VANA cards, indicating that the system is in a normal state.
  • Now, let's consider a fault occurrence, indicated by a 1 on the input L. On the VANA card, the flashing signal is sent to LT, and the corresponding indicator light begins to flash. This action also causes the output AH to switch to 0. This change is fed back to the VANB card through the input AH, where it performs two crucial functions. First, it sets HRD to 0 and triggers relay 30X, causing the alarm bell to sound. Second, it changes the output A to 0, removing the flashing permissive signal.
  • While the first fault continues to flash, any subsequent faults will appear as steady indications. If the ALARM RESET pushbutton is pressed, the VANB card generates an output ACK set to 1. This signal also performs two key actions in the VANA card. It replaces the flashing signal on LT with a steady 0, causing the indicator light to remain continuously on. Simultaneously, it changes the output AH to 1. This change is transmitted back to the VANB card, silencing the alarm bell and allowing the output AHD to become 1.
  • The annunciator control card thus plays an essential role in monitoring and alerting in the control system, ensuring that both flashing and steady alarm signals are properly conveyed and that the system can be reset to a normal state when necessary. This functionality is crucial for maintaining the safety and operational integrity of industrial processes and equipment.

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What is IC3600VANB1?
It is a Annunciator Control Card developed by GE

What is the role of the VANB card in the annunciator control system?
It is responsible for controlling and transmitting signals to the VANA card. It also houses the driver for relay 30X, which is crucial for sounding the alarm bell. Additionally, it generates a flashing signal known as FL, distributed to all VANA cards.

How does the card indicate a normal system state?
In the absence of alarm conditions, the card sets the output AHD to 1. This serves as a flashing permissive signal to all VANA cards, indicating that the system is in a normal state.

What happens when an alarm or fault is detected in the system?
When a fault is detected, typically indicated by a 1 on the input L, the VANA receives a flashing signal on LT, causing the corresponding indicator light to flash. Simultaneously, the output AH on the VANA changes to 0, which initiates specific actions.