GE Mark VIe Series IS200TSVOH1BAA Servo I/O Terminal Block

Specification:

Product Number: IS200TSVOH1BAA

Manufacturer: General Electric

Series: Mark VIe

Product Type: Servo I/O Terminal Block

Number of Inputs: 6 LVDT

Number of outputs: 2

Supply voltage: 24 V DC

Analog output current: 0-20 mA

Excitation voltage: 24 V dc

Maximum lead resistance: 15 Ω

Analog output current: 0-20 mA

Operating temperature: 30 to 50 °C

Dimensions: 17.8 cm H x 33.02 cm

Frequency: 50 or 60 Hz

Technology: Surface mount

Weight: 2 lbs

Country of origin: USA

Manual: GEH-6421

Functional Description:

The IS200TSVOH1BAA is a servo I/O terminal board manufactured and designed by General Electric as part of the Mark VIe series used in GE's distributed turbine control systems. The servo input/output (TSVO) terminal block is connected to two electrohydraulic servo valves that actuate steam/fuel valves. The valve positions are measured using LVDTs. Two cables are connected to the VSVO using the J5 plug on the front of the VSVO and the J3 or J4 connectors on the VME rack. the TSVO provides a simplex signal through the JR1 connector and fans out the TMR signal to the JR1. JS1 and JT1 connectors. Plugs JD1 or JD2 are used for external tripping of the protection module.

Installation:

Connect the sensor and servo valve wires directly to the two I/O terminals on the terminal block as shown in Figure Servo Terminal Block Wiring. Each module is secured with two screws and has 24 terminals that accept wiring up to #12 AWG. The shield terminal strip connected to chassis ground is immediately to the left of each terminal. Connect the external trip wires to JD1 or JD2. Connect the J5 connector to the front of the VSVO board in racks R, S, and T. Connect the J5 connector to the front of the VSVO board in racks R, S and T. Connect the J1 connector to the VME rack underneath the VSVO in racks R, S, and T.

Operation:

The VSVO provides four channels including bi-directional servo current outputs, LVDT position feedback, LVDT excitation, and pulse rate flow inputs.The TSVO provides excitation for, and accepts inputs from, up to six LVDT valve position inputs. One, two, three, or four LVDTs can be selected for each servo control loop, and if three inputs are used, they can be used for gas turbine flow measurement applications. These signals are transmitted through the TSVO and sent directly to the front of the VSVO board at J5. Each servo output is equipped with a firmware-controlled, independent suicide relay that short-circuits the VSVO output signal to common in the event of a power failure and returns it to the nominal limit when a manual reset command is issued. Diagnostics monitor the output status of each servo voltage, current, and suicide relay.

Description:

General Electric's IS200TSVOH1BAA circuit board assembly is part of the company's Mark VI turbine control system. The Mark VI has been monitoring and controlling industrial turbine systems for decades. Meanwhile, Speedtronic systems have been in use since the late 1960s.

This IS200TSVOH1BAA is used as a servo valve termination board. While MKVI systems use many different termination boards, this particular board is a barrier type board that uses screws to clamp the wire connections. When connecting wires to the terminals, it is important to strip the wires to the correct length; otherwise, the screw clamps will be difficult to access.

This IS200TSVOH1BAA has two termination blocks located on one side of the board. Other connectors used on the board include d-shell connectors and vertical plugs. The board has six jumper switches that can be used to change the way a particular circuit works. Each jumper switch on the board has multiple settings. Before removing a jumper from the unit, be sure to make note of the way the jumpers were set on the previous board; best practice suggests duplicating these settings on the new assembly.

Other board components include relays, transformers, ICs, and transistors. For more information on these components and how the board should be located, wired, installed, and maintained, refer to the GE Speedtronic manual.

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