IS220STCIH6A - Simplex Contact Input Terminal Board

SPECIFICATIONS:

Part Number: IS200STCIH6A
Manufacturer: General Electric
Series: Mark VIe
Excitation voltage: 24 V dc
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
Repair: 3-5 Days
Product of Origin: United States
Availability: In Stock
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS200STCIH6A is a Simplex Contact Input Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in Distributed Control Systems. The Simplex Contact Input (STCI) terminal board is a compact contact input terminal board designed for DIN-rail or flat mounting. The STCI board accepts 24 contact inputs that are supplied with a nominal 24, 48, and 125 V dc excitation from an external source. The contact inputs have noise suppression to protect against surge and high-frequency noise. The STCI works with Mark VIe and Mark VIeS systems.

INSTALLATION:

The STCI plus a plastic insulator mounts on a sheet metal carrier that then mounts on a DIN rail. Optionally the STCI plus insulator mounts on a sheet metal assembly that then bolts in a cabinet. The contact inputs are wired directly to the terminal block, typically using #18 AWG wires. Shields should be terminated on a separate bracket. Two types of Euro-block terminal blocks are available:

• STCIH1 has a permanently mounted terminal block with 52 terminals.
• STCIH2, STCIH4, and STCIH6 have a right-angle header accepting a range of commercially available pluggable terminal blocks, with a total of 52 terminals.

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% 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.

WOC has the largest stock of GE Mark VIe Series OEM Replacement Parts. We can also repair your faulty boards. WORLD OF CONTROLS can also supply unused and rebuilt backed-up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs, kindly get in touch with our team by phone or email.

FREQUENTLY ASKED QUESTIONS

Why use a Simplex Contact Input Terminal Board specifically in gas turbine applications?

Gas turbines often require the monitoring of numerous sensors and switches for operational control and safety. The terminal board simplifies the wiring and connection of these inputs, making it easier to integrate them into the turbine's control system.

What types of inputs can be connected to a Simplex Contact Input Terminal Board in a gas turbine system?

Various types of inputs can be connected, including temperature sensors, pressure switches, flow meters, level switches, and other critical sensors that provide essential data for turbine operation and monitoring.

How does the terminal board help in maintaining turbine safety and reliability?

By providing a standardized and organized interface for connecting sensors and switches, the terminal board reduces wiring complexity. This organization ensures that inputs are reliably monitored, contributing to overall system safety and performance.