IS230STCIH2A - Contact Input Module

SPECIFICATIONS

Part No.: IS230STCIH2A
Manufacturer: General Electric
Product Type: Contact Input Module
Size: 15.9 cm high x 10.2 cm wide
Temperature -30 to + 65�C
Technology: Surface-mount
Country of Manufacture: United States (USA)
Availability: In Stock
Series: Mark VIe

Functional Description

IS230STCIH2A is a Contact Input Module developed by GE. It is a part of Mark VIe control system. The Simplex Contact Input terminal board is a DIN-rail or flat-mounting contact input terminal board. The STCI board accepts 24 contact inputs with nominal excitation voltages of 24, 48, and 125 V dc from an external source. To protect against surge and high-frequency noise, the contact inputs have noise suppression. The STCI is compatible with the Mark VIe and Mark VIeS systems.

Operation

• The function and on-board signal conditioning are identical to those found on the TBCI, but they are scaled for 24, 48, and 125 V dc excitation. The input excitation ranges are as follows: 16 to 32 V dc, 32 to 64 V dc, and 100 to 145 V dc. 50% of the excitation voltage is used as the threshold voltage. The figure depicts the contact sensing circuits. Contact input currents are limited by resistance to 2.5 mA on the first 21 circuits and 10 mA on circuits 22-24.
• The 24 V dc supply is current limited to 0.5 A by resetting polymer positive temperature coefficient fuses. Filters at each input near the point of signal entry reduce high-frequency noise and suppress surge. The discrete input voltage signals are routed to the I/O processor, which converts them to digital signals and sends them to the controller via optical isolators.

Installation

• The STCI, along with a plastic insulator, is mounted on a sheet metal carrier, which is then mounted on a DIN rail. The STCI plus insulator can be mounted on a sheet metal assembly that is then bolted into a cabinet. The contact inputs are typically wired directly to the terminal block with 18 AWG wires.
• Shields should be terminated with their own bracket. It have a right-angle header with 52 terminals that accept a variety of commercially available pluggable terminal blocks.

Product Attributes

• Size: 6.25 in. x 4.0 in
• Operating temperature: -22 to 149 �F
• Mounting Technology: Surface-mount
• Number of channels: 24 dry contact voltage input channels
• Excitation voltage: Nominal 24 V dc, floating, ranging from 18.5 to 32 V dc (Pluggable TB)
• Input Current: For 24 V dc applications-First 21 circuits draw 2.5 mA, Last three circuits draw 10 mA
• Input filter: Hardware filter, 4 ms
• Fault detection in I/O board: Loss of contact input excitation voltage, Non-responding contact input in test mode

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Frequently Asked Questions

What is IS230STCIH2A?
It is a Contact Input Module developed by GE.

What is the purpose of STCI board?
It is designed to provide a means of inputting contact signals into a control system. The board's contact inputs are equipped with noise suppression to protect against surge and high-frequency noise.

What systems is the board compatible with?
It is compatible with the Mark VIe and Mark VIeS control systems.

How does the board condition the input signals?
The function and on-board signal conditioning of the board are identical to those found on the TBCI, but they are scaled for 24, 48, and 125 V DC excitation.

What is the maximum input current for the contact inputs?
Contact input currents are limited by resistance to 2.5 mA on the first 21 circuits and 10 mA on circuits 22-24.

How is the 24 V DC supply protected?
The 24 V DC supply is current-limited to 0.5 A by resetting polymer positive temperature coefficient fuses. Filters at each input near the point of signal entry reduce high-frequency noise and suppress surge.