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IS230TBCIH2C - Contact Input with Group IsolatioN Terminal Board is available in stock which ships the same day.
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SPECIFICATIONS:
Part Number: IS230TBCIH2C
Manufacturer: General Electric
Series: Mark VIe
Product Type: Contact Input with Group IsolatioN Terminal Board
Number of channels: 24
Excitation voltage: 125 Vdc
Power supply voltage: 28 V dc
Voltage Range: 14 to 32 V dc
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -30 to 65°C
Size: 33.02 cm high x 10.16 cm
Repair: 3-7 Day
Availability: In Stock
Manual: GEH-6421M
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
IS230TBCIH2C is a Contact Input with Group IsolatioN Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Gas Turbine Control Systems. The Contact Input with Group Isolation (TBCI) terminal board accepts 24 dry contact inputs wired to two barrier-type terminal blocks. DC power is wired to TBCI for contact excitation. The contact inputs have noise suppression circuitry to protect against surge and high-frequency noise. In the Mark VIe system, the TBCI works with the PDIA I/O pack and supports simplex, dual, and TMR applications. One, two, or three PDIAs can be plugged directly into the TBCI. Mark VIe requires the C version of this board for correct mechanical alignment of connector JT1 with I/O pack mechanical support.
INSTALLATION:
Connect the wires for the 24 dry contact inputs directly to two I/O terminal blocks on the terminal board. These blocks are held down with two screws and can be unplugged from the board for maintenance. Each block has 24 terminals accepting up to #12 AWG wires. A shield terminal strip attached to chassis ground is located immediately to the left of each terminal block. In a simplex system, connect TBCI to the I/O processor using connector JR1. In a TMR system, connect TBCI to the I/O processors using connectors JR1, JS1, and JT1. Cables or I/O packs are plugged in depending on the type of Mark VI or Mark VIe system, and the level of redundancy.
OPERATION:
Filters reduce high-frequency noise and suppress surgeon input near the point of signal entry. The dry contact inputs on H1 are powered from a floating 125 V dc (100-145 V dc) supply from the turbine control. The 125 V DC bus is currently limited in the power distribution module before feeding each contact input. H2 and H3 versions use lower voltages as shown in the specification table. The discrete input voltage signals pass to the I/O processor, which sends them through optical isolators providing group isolation and transferring the signals to the system controller. The reference voltage in the isolation circuits sets a transition threshold that is equal to 50% of the applied floating power supply voltage. The tracking is clamped to go no less than 13% of the nominal rated supply voltage to force all contacts to indicate open when the voltage dips below this level.
WOC has the largest stock of GE Distributed Gas Turbine Control System 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.
What is the capacity of each terminal block on the terminal board?
Each terminal block is equipped with 24 terminals that can accept up to 12 AWG wires. This generous capacity makes the terminal board suitable for managing a considerable number of contact inputs in a compact space.
How does the shield terminal strip contribute to the reliability of the contact inputs?
Adjacent to each terminal block, a shield terminal strip is thoughtfully attached to the chassis ground. This strip serves as a dedicated grounding point, effectively grounding and shielding the contact inputs. By protecting against electromagnetic interference and noise, the shield terminal strip ensures signal integrity and reliable performance of the contact inputs.
How does the left-side location of the shield terminal strip enhance convenience?
The proximity of the shield terminal strip to the left of each terminal block enhances wiring convenience and organization. With the grounding points immediately adjacent to the terminal blocks, the length of grounding wires is minimized. This reduces the possibility of ground loops and further improves the reliability of the contact inputs.
