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IS230TCISH3C - Isolated Contact Input Terminal Board is available in stock which ships the same day.
IS230TCISH3C - Isolated Contact Input Terminal Board comes in UNUSED as well as REBUILT condition.
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TECHNICAL SPECIFICATIONS:
Part Number: IS230TCISH3C
Manufacturer: General Electric (GE)
Series: Mark VIe Speedtronic
Board Type: Isolated Contact Input Terminal Board (TCIS)
Number of Channels: 24 Discrete Inputs
Excitation Voltage: 48 VDC (Nominal)
Voltage Range: 18 to 32 VDC (Application Dependent)
Current Rating: 2.5 mA per channel (Wetting Current)
Isolation Architecture: Group Isolation (Galvanic)
Terminal Blocks: Two high-density barrier-type blocks (TB1 & TB2)
Connectors: 3 � 37-pin D-type (JR1, JS1, JT1)
Mounting Configuration: DIN-rail or Base Mount
Operating Temperature: -30�C to 65�C
Humidity: 5% to 95% (non-condensing)
Vibration Resistance: High-vibration industrial grade
Availability: In Stock
FUNCTIONAL DESCRIPTION:
The IS230TCISH3C is a high-performance Isolated Contact Input Terminal Board�designed and manufactured for the GE Mark VIe control architecture. It serves as the primary interface for 24 discrete contact inputs, typically originating from dry contact field devices like limit switches, pressure switches, and auxiliary relay contacts. The board is designed to bridge field-side signals with the digital processing environment of the Speedtronic system.
RELIABLE CONTACT STATE ACQUISITION:
The TCIS module features dedicated input filtering. This circuitry effectively suppresses high-frequency noise and protects the system from transient voltage spikes. By utilizing Group Isolation, the board provides a galvanic barrier between the field wiring and the I/O packs, preventing ground loops and ensuring that electrical faults in the field do not compromise the core control logic.
CRITICAL TRIP LOGIC RELIABILITY:
The IS230TCISH3C is fully compatible with Simplex, Dual, and TMR (Triple Modular Redundant) configurations. Through its JR1, JS1, and JT1 connectors, the board fans out every input signal to up to three independent I/O packs. This redundancy allows the Mark VIe controller to perform 2oo3 (two-out-of-three) voting on critical signals, ensuring high availability and protecting against nuisance turbine trips.
OPTIMIZED CONTACT WETTING PERFORMANCE:
The H3C variant is specifically designed for 48 VDC contact excitation. This voltage level provides the necessary wetting current to penetrate surface oxidation on field contacts, ensuring a reliable electrical connection. Maintaining a consistent excitation rail is vital for registering digital state changes instantly, which is a requirement for high-speed turbine protection loops.
INTEGRATED DIAGNOSTIC MONITORING:
To maintain system uptime, the board includes integrated diagnostic monitoring for the excitation voltage. If the power supply feeding the field contacts fails, the hardware immediately communicates a diagnostic alarm to the controller. This allows maintenance teams to address power issues proactively before a critical field event occurs, maintaining the integrity of the safety watchdog.
SIMPLIFIED FIELD WIRING INTERFACE:
The board features two rugged barrier-type terminal blocks designed for the secure termination of field wiring. The layout is optimized for ease of access during loop checks and routine maintenance. Its rugged design is built to withstand the high vibration and temperature fluctuations commonly found in turbine control enclosures.
WHY BUY FROM WOC:
World of Controls (WOC) is a premier global supplier specializing in the long-term support of GE Mark VIe assets, maintaining an extensive inventory of the IS230TCISH3C in both UNUSED and REBUILT conditions to ensure that downtime in power generation remains a non-issue. Our commitment to quality is backed by an expert in-house technical team that subjects every board to a rigorous certification process, including 24-channel point-to-point continuity verification, comprehensive insulation resistance testing, and load-simulated excitation bus checks. By choosing WOC, you receive hardware that delivers guaranteed OEM-level performance, supported by 24/7 technical assistance and rapid global shipping designed to keep your plant operational and efficient.
What is the IS230TCISH3C?
The IS230TCISH3C is a 24-channel Isolated Contact Input Terminal Board used in General Electric Mark VIe control systems. It accepts discrete inputs from field devices and provides electrical isolation and signal conditioning before passing the data to the system I/O packs.
What is the main difference between the TCIS H3C and other TCIS variants?
The H3C version is specifically designed for 48 VDC applications. While other versions might handle 125 VDC or 24 VDC, using the wrong variant can lead to component failure or inadequate switching thresholds. Always match the H suffix to your system design voltage.
Can I replace a TCIS board while the turbine is online?
In a redundant configuration, the terminal board itself is a common point of connection. While I/O packs are hot-swappable, replacing the terminal board requires disconnecting the field wiring. This should only be performed during a scheduled outage or if the specific inputs are not tied to active trip logic.
How does the board handle AC interference?
The Isolated Contact Input Terminal Board includes onboard filtering designed to reject AC interference often found in long cable runs. However, if the induced AC voltage is excessive, it is necessary to ensure proper cable shielding at the terminal block shield strip to maintain signal accuracy.
