IS210DTCIH1A - Contact Input Terminal Board

SPECIFICATIONS

Part Number: IS210DTCIH1A
Manufacturer: General Electric
Country of Manufacture: United States (USA)
Mounting Type: DIN-rail mounting
Inputs: 24 contact inputs per board
Excitation Voltage: 24 V dc nominal (18–32 V dc range)
Scalability: Supports two boards per processor for 48 inputs
Temperature rating: 0 to 60oC (32 to 140 oF)
Temperature: 0 to 60oC
Size: 8.26 cm high x 4.19 cm wide x 12.1 cm deep
Technology: Surface-mount
Series: Mark VI
Function: contact input terminal board

Functional Description

IS210DTCIH1A is a contact input terminal board developed by GE. It is part of the GE Speedtronic Mark VI gas turbine control system. It is designed for reliable, high-speed monitoring of discrete contact signals from turbine and auxiliary systems, ensuring precise control and protection of critical processes.

Design and Functionality

• The Simplex Contact Input with Group Isolation (DTCI) terminal board is a compact, DIN-rail mountable unit engineered for space-efficient installation in control cabinets.
• Each DTCI board provides 24 contact inputs, designed for a nominal 24 V dc excitation.
• The board connects directly to the VCCC (or VCRC) processor board via a single cable, simplifying installation and cabling.
• Two DTCI boards can be connected to a single processor board, allowing for up to 48 contact inputs in total.
• The boards can be stacked vertically on the DIN-rail, conserving cabinet space without sacrificing functionality.
• Only the simplex version of this board is available, making it ideal for standard control system configurations.

Operational Details

Operates similarly to the TBCI terminal board, with signal conditioning optimized for 24 V dc input signals:

• Input Excitation: 18 to 32 V dc
• Threshold Voltage: 50% of the excitation voltage
• AC Voltage Rejection: 12 V rms

Nominal Input Current:

• Circuits 1–21: 2.5 mA
• Circuits 22–24: 10 mA

The board includes filters on each input to reduce high-frequency noise and suppress voltage surges near the point of signal entry. The discrete input signals are then cabled to the VCCC or VCRC processor board, where they pass through optical isolators and are transferred over the VME backplane to the VCMI, which communicates the signals to the controller.

This architecture ensures reliable detection and processing of contact inputs while protecting the system from electrical noise and transient disturbances.

Fault Detection Features

• Loss of Contact Input Excitation Voltage: Detects when the 24 V dc supply to the inputs is missing or unstable.
• Non-Responding Contact Input in Test Mode: Identifies inputs that fail to respond during diagnostics or maintenance testing.
• Unplugged Cable: Alerts the controller if the connection between the DTCI board and the processor board is disrupted.
• These features help prevent system errors, allow quick troubleshooting, and maintain continuous turbine control and protection.

WOC has the largest stock of Speedtronic Mark VI Spares, and we can repair your faulty spares with a warranty. WORLD OF CONTROLS can also supply unused and rebuilt components backed up with a warranty. Our team of experts is available round the clock to support your urgent needs related to critical spares, contact us.

FREQUENTLY ASKED QUESTIONS

What is IS210DTCIH1A?
It is a contact input terminal board and is part of the GE Speedtronic Mark VI gas turbine control system.

How many contact inputs does the board support?
Each board supports 24 contact inputs. Two boards can be connected to a single processor board (VCCC or VCRC) for a total of 48 inputs.

How is the board installed?
The board is mounted on a DIN-rail using a plastic holder. It connects to the processor board via a single dedicated cable, and boards can be stacked vertically to save cabinet space.

What is the input voltage range?
The board operates with 24 V dc nominal excitation, with an acceptable range of 18 to 32 V dc.

What type of input current does it use?
Circuits 1-21 draw 2.5 mA nominal, while circuits 22–24 draw 10 mA nominal.

Does the board include signal conditioning?
Yes, it has on-board filters to reduce high-frequency noise and suppress voltage surges, ensuring reliable signal transmission.