SPECIFICATIONS
Part No.: IS200VAOCH1CBC
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Number of channels: 16
Analog outputs: 0-20 mA
D/A converter resolution/accuracy: 12 bit resolution
Frame rate: 100 Hz on all 16 outputs
Product Type: Analog Output Board
Availability: In Stock
Series: Mark VI
Functional Description
IS200VAOCH1CBC is an analog output board developed by GE. It is a part of Mark VI control system. The Analog Output Board manages sixteen analog outputs, each operating at 20 mA. These outputs are linked to two terminal blocks situated on the Analog Output Terminal Board (TBAO). Using cables equipped with molded plugs, the terminal board is connected to the VME rack housing the VAOC processor board. It facilitates 16 analog outputs ranging from 0 to 20 mA. D/A converter and driver are integrated to generate the controlled currents. The output current is gauged by assessing the voltage drop across a resistor located on the terminal board.
Board Version Compatibility
- Encompasses all versions preceding and including VAOCH1B.
- Designed to accommodate up to 500 W load resistance when driving 20 mA outputs, considering a maximum wire length of 1000 ft with #18 wire.
- Proper functionality necessitates the use of terminal board TBAOH1B or earlier models.
- Ensures compatibility with all iterations of DTAI terminal boards.
- Newest VAOC Generation (VAOCH1C and subsequent releases):
- Engineered to support enhanced load resistance capabilities on the initial eight output circuits.
- Facilitates drive voltage of up to 18 V for 20 mA outputs at the terminal board screw terminals.
- Allows operation into loads of up to 800 W with a wire length of 300 m (984 ft) using #18 wire, with sufficient margin.
- The second set of eight output circuits maintains the original 500 W rating of the VAOC.
- Requires the utilization of TBAOH1C or later terminal board versions for optimal performance and compatibility.
Fault Detection
- Output Current Out of Limits: Continuously monitors the output current to detect any deviations from the specified range of 0 to 20 mA. If the output current exceeds or falls below these limits, indicating a potential malfunction or anomaly, the system triggers an alarm to alert operators of the issue.
- Outer Total (TMR) Current: The Total Measured Resistance (TMR) of the output circuitry is closely monitored. Any irregularities or fluctuations in the TMR, which could signify a fault or disruption in the circuit, prompt the system to initiate corrective actions or raise an alarm for further investigation.
- D/A Converter Output: The digital-to-analog (D/A) converter output undergoes continuous scrutiny to ensure accurate conversion and generation of the controlled currents. Any discrepancies or malfunctions in the D/A converter output are swiftly identified by the VAOC, enabling timely intervention to maintain system integrity and performance.
- Suicide Relay Operation: The operation of suicide relays, which serve as fail-safe mechanisms within the VAOC, is monitored to detect any unexpected activations or failures. If a suicide relay is triggered erroneously or fails to operate as intended, the VAOC promptly intervenes to prevent potential system failures and ensure uninterrupted operation.
- Failed ID Chip: Each component within the VAOC is equipped with an identification (ID) chip for system recognition and monitoring purposes. In the event of a failed ID chip, where the component's identity cannot be verified or communicated properly, the VAOC flags this as a fault condition, triggering appropriate responses to rectify the issue and restore normal operation.
Installation
- Power Down the VME I/O Processor Rack: Before beginning the installation, ensure that the VME I/O processor rack is completely powered down. This step is critical to avoid any electrical damage to the board or the system during installation.
- Insert the Board: Carefully align the board with the designated slot in the rack. Gently slide the board into the slot, ensuring that the connectors on the board align with the edge connectors in the rack. Once aligned, use your hands to push the top and bottom levers inward. This action will firmly seat the board into the connectors.
- Tighten the Captive Screws: After the board is securely seated, locate the captive screws at the top and bottom of the front panel. Tighten these screws to secure the board in place, ensuring it remains stable during operation.
- Power Up the VME Rack: After securing the board, power up the VME I/O processor rack. Once powered, inspect the diagnostic lights located at the top of the front panel of the VAOC board. These lights will provide an indication of the board’s status and whether the installation was successful.
Other features
- Number of Channels: Analog Output Board features 16 current output channels, all of which are single-ended, meaning one side is connected to a common reference point.
- Analog Outputs: Each channel supports analog outputs ranging from 0 to 20 mA, accommodating up to 500 ohm of burden. This broad range ensures compatibility with various devices and systems.
- Response: The board boasts a response capability exceeding 50 rad/sec, ensuring swift and accurate adjustments to input signals for optimal performance.
- D/A Converter Resolution and Accuracy: Utilizing a high-resolution digital-to-analog (D/A) converter, the VAOC achieves 12-bit resolution with an impressive accuracy of 0.5%. This precision guarantees faithful representation of digital values in the analog domain.
- Frame Rate: Maintaining a consistent frame rate of 100 Hz across all 16 outputs, the VAOC ensures rapid data processing and output updates, crucial for real-time applications.
The WOC team is always available to help you with your Mark VI requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200VAOCH1CBC?
It is an analog output board developed by GE under the Mark VI series.
What diagnostics are performed on each output?
Diagnostics include monitoring voltage drops across resistors, D/A outputs, and shutdown relay contacts, ensuring output health.
What standard diagnostic information is available?
Standard diagnostics cover high/low limit checks and system limit checks. An alarm (L3DIAG VAOC) indicates output abnormalities.
How are diagnostic signals managed?
Signals can be individually latched for focused analysis and reset using RESET DIA upon resolution.
How are terminal board connectors identified?
Each connector features an ID chip with board details. Mismatch detection triggers a hardware incompatibility fault.
