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SPECIFICATIONS:
Part Number: IS230TBAIH4C
Manufacturer: General Electric
Series: Mark VIe
Product Type: Analog Input/Output Terminal Board
Number of channels: 12
Input span, transmitters: 1-5 V dc
Technology: Surface Mount
Size: 10.16 cm wide x 33.02 cm
Common Mode Voltage Range: ±5 V
Operating temperature: 30 to 65 °C
No.of Analog Voltage Inputs: 6
Repair: 3-7 Days
Weight: 2.00 lbs
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D
FUNCTIONAL DESCRIPTION:
IS230TBAIH4C is an Analog Input/Output Terminal Board manufactured and designed by General Electric as part of the VIe Series used in GE Distributed Turbine Control Systems. The Analog Input terminal board supports 10 analog inputs and two outputs. The 10 analog inputs accommodate two-wire, three-wire, four-wire, or externally powered transmitters. The analog outputs can be set up for 0-20 mA or 0-200 mA current. Inputs and outputs have noise suppression circuitry to protect against surges and high-frequency noise. There are three DC-37 pin connectors provided on TBAI for connection to the I/O processors. Connections may be simplex on a single connector (JR1) or TMR using all three connectors. Connections may be through cables or directly to the electronics. In TMR applications, the input signals are fanned to the three connectors for the R, S, and T controls. TMR outputs operate by combining the current of the three connected output drivers and determining the total current with a measuring shunt on the TBAI. The TBAI then presents the total current signal to the electronics for regulation to the commanded setpoint.
INSTALLATION:
The 10 inputs and two outputs are wired directly to two I/O terminal blocks mounted on the terminal board. Each block is held down with two screws and has 24 terminals accepting up to #12 AWG wires. A shield terminal attachment point is located adjacent to each terminal block. The types of analog inputs and outputs that can be accommodated are as follows:
OPERATION:
A 24 V DC power source is available on the terminal board for all the transducers. There is a choice of current or voltage inputs using jumpers. One of the two analog output circuits is 4-20 mA, and the other can be jumper-configured for 4-20 mA or 0- 200 mA. The same terminal board can be used for TMR applications. Transmitters/transducers can be powered by the 24 V DC source in the control system, or can be independently powered. Terminal board jumpers J#A, J#B, and JO set up the type of voltage and current inputs, and select the type of current output. Each output is monitored by diagnostics, and a suicide relay in the I/O controller disconnects the corresponding output if a fault cannot be cleared by a command from the processor.
In a TMR system, analog inputs fan out to the three I/O controllers (VAIC or PAIC). The 24 V dc power to the transducers comes from all three controllers and is diode-shared on the terminal board. Each analog current output is fed by currents from all three controllers. The actual output current is measured with a series resistor, which feeds a voltage back to each I/O controller. The resulting output is the voted middle value (median) of the three currents.
WOC maintains one of the industry’s largest inventories of GE Distributed turbine control system replacement parts, ensuring fast access to critical components when you need them most. In addition to supplying unused, rebuilt, and fully tested boards backed by a comprehensive warranty, we also provide expert repair services to restore your faulty modules to optimal performance. With a dedicated team of specialists available 24/7, WOC delivers reliable technical support, OEM-grade solutions, and end-to-end assistance for all your automation, maintenance, and operational requirements. For pricing, availability, or repair inquiries, simply contact our team by phone or email. We’re always ready to help.
What is the IS230TBAIH4C?
It is an analog input/output terminal board used in GE Mark VIe Distributed Turbine Control Systems. It supports 10 analog inputs and 2 analog outputs, converting sensor signals to precise control outputs for turbine operation. The board includes noise suppression circuitry to protect against surges and high-frequency interference. It can be used in simplex or TMR configurations.
How are analog output currents measured and regulated?
The outputs from the three controllers are combined on the board, and the total output current is measured via a series resistor (shunt). The voltage across the shunt is fed back to each controller, which regulates the output to match the commanded setpoint. This ensures that TMR outputs maintain consistent, accurate signals.
What is the function of jumpers J#A, J#B, and JO?
Jumpers J#A and J#B select between voltage and current modes for analog inputs, while jumper JO configures the second analog output for either 4–20 mA or 0–200 mA. Correct jumper settings are critical for proper transmitter compatibility and output signal scaling. Misconfigured jumpers can cause inaccurate readings or output errors.
How is noise suppression implemented on the IS230TBAIH4C?
The board integrates high-frequency filters and surge suppression circuits on each input and output line. This protects the system against transient voltage spikes and electromagnetic interference. Proper grounding of the shield terminals further reduces noise coupling from external sources.
