IS210SCLTH1A - Core Analog Terminal Board

IS210SCLTH1A - Core Analog Terminal Board IS210SCLTH1A - Core Analog Terminal Board

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Part Number: IS210SCLTH1A
Manufacturer: General Electric
Series: Mark VI
Size: 6.25 inch x 7 .00 inch
Temperature: -30 to 65oC
Technology: Surface mount
Number of channels :18
Interface: With SCLS and field wires
Fault detection: Incorrect ID chip
Availability: In Stock
Country of Manufacture: United States (USA)

Functional Description

IS210SCLTH1A is a Core Analog Terminal Board developed by GE. It is a part of Mark VI control system. The Core Analog (SCLT) terminal board serves as an invaluable extension for the PCLA module by offering supplementary I/O (input/output) terminals. This expansion allows for a more versatile and comprehensive utilization of the PCLA module's capabilities. The terminal board fulfills the crucial role of managing input signals that are distributed to either one or three PCLA modules. Furthermore, it is also responsible for handling the output signals that have undergone a voting process.


  • It includes the accommodation of eight thermocouple inputs, which are pivotal for monitoring temperature variations with a high degree of accuracy. Additionally, the board accommodates four analog voltage or current inputs, which can be employed to capture and measure a variety of analog signals, thereby contributing to a comprehensive data acquisition process.
  • For outputs, the terminal board boasts six 4-20 mA outputs, adding a layer of flexibility to the control and command functions of the system. These outputs can be manipulated to affect various processes or actions, catering to a wide array of operational needs. Notably, a distinct 24 V DC power source is allocated specifically to supply power to all four 4-20 mA inputs on the board, ensuring consistent and reliable operation.
  • The physical architecture is designed for convenience and practicality. It features a total of forty-eight pluggable Euro-style box-type terminal blocks. These terminal blocks are strategically positioned to serve as accessible and organized connection points for field wires. This meticulous arrangement streamlines the wiring process, allowing for efficient installation and maintenance procedures.
  • In essence, the Core Analog terminal board amplifies the capabilities of the PCLA module by providing an expanded range of I/O terminals. Its capacity to manage diverse inputs, outputs, and power sources optimizes system functionality. The incorporation of user-friendly pluggable terminal blocks adds a layer of practicality, simplifying field wiring tasks. This amalgamation of features underscores the SCLT terminal board's significance in enhancing the performance and adaptability of the interconnected systems.


  1. During the installation process, specific provisions have been made to ensure a streamlined and efficient setup for the I/O (Input/Output) cables. Adjacent to the terminal blocks, a designated I/O cable shield terminal is included. This shield terminal plays a crucial role in maintaining the integrity of the signals being transmitted through the I/O cables, safeguarding them from potential interference or disruptions that could compromise the accuracy and reliability of the data being exchanged.
  2. In terms of field device I/O connections, the architecture is meticulously designed for both convenience and practicality. On the SCLS, the system accommodates a total of 72 Euro-style box-type terminal blocks. These terminal blocks serve as essential connection points where field devices are linked to the system. The utilization of Euro-style box-type terminals not only simplifies the process of connecting wires but also contributes to an organized and efficient layout, thereby minimizing the risk of errors during installation and subsequent maintenance.
  3. On the other side of the spectrum, the SCLT side of the system features 48 Euro-style box terminals. These terminals also facilitate the connection of field devices to the system, effectively completing the I/O pathway. The strategic placement and numbering of these terminals help to establish an intuitive and user-friendly interface, enabling installers and technicians to accurately identify and manage the connections.
  4. By employing this thoughtful and well-structured configuration, the installation procedure is enhanced in multiple ways. First and foremost, the segregation of the I/O cable shield terminal ensures that the system's signals remain unimpaired, fostering dependable and accurate data transmission. The inclusion of a substantial number of terminal blocks on both the SCLS and SCLT sides not only caters to diverse field device requirements but also optimizes the organization and accessibility of the connections. As a result, the installation process becomes more efficient, less prone to errors, and ultimately contributes to a system that is poised for reliable and effective operation.


  • The module facilitates the distribution of input signals to one or more PCLA modules, employing highly reliable passive circuits that uphold redundancy in critical applications. This meticulous approach ensures consistent and dependable performance even in redundant configurations. To fuel its operation, the module draws 28 V DC power from the interconnected PCLA modules, establishing a cohesive power-sharing arrangement.
  • To enhance resilience, the power supplies from all PCLA modules are interconnected via diodes, utilizing a Diode-OR configuration. This design strategy effectively aggregates power inputs, creating a redundant power source for the 24 V DC outputs. Each of these 24 V outputs on the SCLT module is equipped with an individual voltage regulator, enriched with thermal shutdown capabilities that act as a safeguard, protecting the branch circuit against potential thermal overload.
  • In terms of connectivity and interface, the board is furnished with customer-accessible terminals as well as 68-pin connectors specially designed to interface with the terminal board cable. This orchestrated arrangement streamlines the connections and interactions between the SCLT and SCLS components, ensuring a harmonious and cohesive system.
  • Furthermore, the practicality and user-friendliness of the design are reinforced through the inclusion of forty-eight pluggable Euro-style box-type terminal blocks. These terminal blocks serve as dedicated points for field wire connections. By providing these secure and organized connection points, the module expedites the field wire terminalization process, enhancing the efficiency of both installation and subsequent maintenance activities.

World of Controls has the most comprehensive collection of GE Mark VI components. Please contact WOC as soon as possible if you require any extra information.

Frequently Asked Questions

What is IS210SCLTH1A?
It is a Simplex Terminal Board developed by GE

What is the maximum distance for locating the thermocouple inputs from the turbine control cabinet?
The thermocouple inputs can be located up to 300 meters (984 feet) from the turbine control cabinet.

What is the maximum allowable two-way cable resistance for the thermocouple inputs?
The maximum allowable two-way cable resistance for the thermocouple inputs is 450 ohms.

What features are included in the SCLT-SCLS terminal boards?
The SCLT-SCLS terminal boards come equipped with high-frequency noise suppression capabilities and include one cold junction reference device.

How are analog-to-digital conversion and linearization of thermocouple types performed?
The I/O processor handles the analog-to-digital conversion and linearization process for the individual thermocouple types.