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SPECIFICATIONS:
Part Number: IS200TBCHIH2B
Manufacturer: General Electric
Series: Mark VIe
Product Type: Contact Input Terminal Board
Voltage Range: 18 - 32 VDC
Mounting: DIN-rail mounting
Terminals: 24
Technology: Surface mount
Operating temperature: -30 to 65°C
Size: 3.175 cm high x 12.7 cm wide
Repair: 3-7 Day
Availability: In Stock
Country of Origin/Manufacturer: United States
Manual: GEH-6721_Vol_II
FUNCTIONAL DESCRIPTION:
IS200TBCHIH2B is a Contact Input Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Turbine Control Systems. The TBCH terminal board is designed to work with the PDIA I/O pack and supports simplex, dual, and TMR configurations. It can accommodate one, two, or three PDIAs directly. For proper mechanical alignment of connector JT1 with the I/O pack's mechanical support, the Mark VIe control system requires the C version of this board.
INSTALLATION:
To connect the 24 dry contact inputs, wire them directly to the two I/O terminal blocks on the terminal board. These blocks are secured with screws and can be unplugged for maintenance. Each block accommodates up to #12 AWG wires through its 24 terminals. A shield terminal strip for chassis ground is located to the left of each terminal block. For a simplex system, connect the TBCH to the PDIA I/O pack using connector JR1. In a TMR system, connect the TBCH to the three PDIAs via connectors JR1, JS1, and JT1. The PDIAs plug into the TBCH and attach to side-mounting brackets. Additionally, one or two Ethernet cables should be connected to the I/O pack. Firmware updates may be necessary. Finally, connect the TBCH to the contact excitation voltage source using plugs JE1 and JE2.
OPERATION:
Discrete input voltage signals are transmitted to the PDIA I/O pack, which routes them through optical isolators. These isolators provide group isolation and transfer the signals to the Mark VIe controller. The reference voltage in the isolation circuits sets a transition threshold at 50% of the applied floating power supply voltage, with tracking clamped to no less than 13% of the nominal supply voltage to ensure all contacts indicate open if the voltage drops below this level. Each input has a pair of terminal points: one for the positive DC source and one for the return. The current loading is 2.5 mA per point for the first 21 inputs on each terminal board, with the last three supporting a 10 mA load for interfacing with remote solid-state output electronics.
WOC has the largest stock of OEM Replacement Parts for GE Distributed Control Systems. We can also repair your faulty boards and supply unused and rebuilt boards 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 parts and repairs, kindly contact our team by phone or email.
What is the purpose of the TBCH terminal board?
The TBCH terminal board is used to connect dry contact inputs to the PDIA I/O pack in turbine control systems. It provides a way to interface these inputs with the control system and includes features for noise reduction and signal isolation.
What power supply does the TBCH use?
The TBCH is powered by a floating 125 V DC supply from the turbine control system. The power distribution module limits the current before it reaches each contact input. For versions H2, H3, and H4, different voltage levels are used.
How is current loading managed on the terminal board?
The first 21 inputs on each terminal board have a current loading of 2.5 mA per point. The last three inputs support a 10 mA load for interfacing with remote solid-state output electronics.
