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IS220STCIH6A

IS220STCIH6A - Compact Contact Input Terminal Board

IS220STCIH6A - Compact Contact Input Terminal Board IS220STCIH6A - Compact Contact Input Terminal Board

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SPECIFICATIONS

Part No.: IS220STCIH6A
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Operating Temperature: -30 to + 65oC
Product Type: Contact Input Terminal Board
Number of Channels: 24
Size: 15.9 cm high x 10.2 cm
Input filter: Hardware filter, 4 ms
AC Voltage Rejection: 12 V rms
Technology: Surface-Mount
Product Type: compact contact input terminal board
Availability: In Stock
Series: Mark VIe

Functional Description

IS220STCIH6A is a compact contact input terminal board developed by GE. It is a part of Mark VIe series. The STCI board is a compact terminal board engineered for versatile mounting options, DIN-rail or flat mounting. It accommodates 24 contact inputs, supporting nominal 24, 48, and 125 V dc excitation from an external power source. Robust noise suppression capabilities protect against surges and high-frequency noise, ensuring stable operations. It serves as a reliable and adaptable component within the Mark VIe system, offering robust features and protective measures for stable and durable performance in various industrial settings.

Features

  • The card accommodates 24 contact inputs.
  • The board supports nominal 24V, 48V, and 125V dc excitation from an external power source, providing flexibility for integration into different setups. The input excitation range spans:
    • 16 to 32 V dc (for 24 V excitation),
    • 32 to 64 V dc (for 48 V excitation),
    • 100 to 145 V dc (for 125 V excitation).
  • Activation thresholds are set at 50 percent of the excitation voltage, ensuring that the inputs are triggered at the correct voltage levels.
  • The board incorporates robust noise suppression capabilities to protect against surges and high-frequency noise, which is critical for maintaining stable performance in electrically noisy industrial environments. These features help to ensure the reliability of the system even in demanding conditions.
  • For input protection, contact input currents are limited to 2.5 mA for the first 21 circuits to manage resistance limitations. Circuits 22 to 24 can handle currents up to 10 mA, allowing flexibility in handling different types of inputs.
  • The 24 V dc supply for the contact inputs is regulated with a maximum current of 0.5 A, using resettable polymer positive temperature coefficient fuses. This provides an additional layer of protection for the board and ensures safe operation.
  • Integrates seamlessly into the Mark VIe systems, working in conjunction with the PDIA I/O pack. The PDIA I/O pack connects to the terminal board via a D-type connector and communicates with the controller through Ethernet. It is important to note that only simplex systems are compatible with this configuration, ensuring that the board operates effectively within this setup.
  • The board mirrors many of the functionalities of the TBCI board, with adjustments tailored for 24, 48, and 125 V dc excitation. Like the TBCI, the STCI board offers on-board signal conditioning, but with the flexibility to accommodate varying excitation voltages, making it a versatile choice for different industrial systems.

Installation PRocedure

  • Sheet Metal Carrier and DIN Rail Mounting: The board, along with a plastic insulator, is securely mounted on a sheet metal carrier designed specifically for DIN rail installation. This assembly ensures stability and ease of placement within the system.
  • Optional Cabinet Mounting: Alternatively, the board with the insulator can be affixed to a sheet metal assembly that bolts directly into a cabinet. This option offers versatility in installation, accommodating different spatial constraints or preferences within the equipment.
  • Terminal Block Connection: The contact inputs are directly wired to the terminal block on the STCI board. Typically, #18 AWG wires are used for this purpose. The use of appropriately sized wires ensures reliable connectivity and efficient signal transmission between the inputs and the terminal block.
  • Shield Termination: Shields associated with the contact inputs should be carefully terminated on a separate bracket. This segregation of shielding helps prevent electromagnetic interference and maintains signal integrity, which is crucial for the accurate operation of the STCI board.
  • E1 and E2 Grounding Screws: These screws, labeled E1 and E2, serve as designated chassis grounding points specifically intended for the SCOM system. Proper grounding using these screws is essential for maintaining the integrity of SCOM operations, ensuring system safety, and minimizing the risk of electrical disturbances.

Operation

  • The function and on-board signal conditioning are the same as those on TBCI, they are scaled for 24, 48, and 125 V dc excitation. The input excitation range is 16 to 32 V dc, 32 to 64 V dc, and 100 to 145 V dc respectively.
  • The threshold voltage is 50 percent  of the excitation voltage. The contact sensing circuits are displayed in the figure. Contact input currents are resistance limited to 2.5 mA on the first 21 circuits, and 10 mA on circuits 22 through 24.
  • The 24 V dc supply is currently limited to 0.5 A using polymer positive temperature coefficient fuses that can be reset. Filters reduce high-frequency noise and suppress surgeon input near the point of signal entry.
  • The discrete input voltage signals go to the I/O processor which passes them through optical isolators, converts them to digital signals, and transfers them to the controller.

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

Frequently Asked Questions

What is IS220STCIH6A?
It is a compact contact input terminal board developed by GE under the Mark VIe series.

What happens if the contact excitation voltage drops below 40 percent of the nominal voltage?
If the contact excitation voltage falls below 40 percent of the nominal voltage, a diagnostic alarm is triggered and latched, indicating a potential voltage supply issue.

How are faulty inputs detected and managed during testing?
During testing, if any input associated with the terminal board fails, it is immediately forced into the failsafe state (open contact), and a fault is generated for identification and resolution.

What is the purpose of the ID device on the terminal board connector?
The ID device contains essential board information (serial number, type, revision) and ensures compatibility. If a mismatch is detected, a hardware incompatibility fault is set, alerting about potential hardware issues.