About the IS200VRTDH1B
A Mark VI Speedtronic series printed circuit board, the IS200VRTDH1B is modified through the inclusion of a singular functional revision, rated at a "B" grade. This B-rated revision is considered a functional revision, as it may enhance both the performance specifications and the dimensions of the parent IS200VRTDH1 model, expanding its overall functionality. This PCB can be more explicitly defined as a VME Resistor Temperature Device, which conveniently make up the letters in the VRTD official functional acronym. This Mark VI Speedtronic series component part is available for both repair and replacement right here at AX Control, with a standard one to two week repair lead time. This IS200VRTDH1B device's greater Mark VI Turbine Control System Series that this IS200VRTDH1B device belongs to has to be described as one of the final-developed GE Mark product series to feature the patented Speedtronic control system technology first seen with the original rollout of the primary Mark I Series in the mid to later 1960s. With this being the case, this IS200VRTDH1B product's Mark VI Series' overall desirability on its greater promotional marketplace is increased greatly.
Hardware Tips and Specifications
The IS200VRTDH1B is a crucial device to many components in the greater Mark VI Speedtronic series drive assembly. For example, a series of cables with molded fittings connect this VRTD-abbreviated terminal board to the greater VME rack, which necessitates its insertion for RTD open and short circuit detection purposes. Because of the various compatibilities associated with the IS200VRTDH1B and any Mark VI Speedtronic terminal board, it remains important to be cognizant of the various connector and input types included through the hardware of the VRTD PCB. Some of the components that can be attached to the base circuit board of the IS200VRTDH1B include:
- 37-pin "D" shell-type connectors with latching fasteners
- Molded Fitting Cables for VME rack installation
- J3 and J4 connectors on the VME I/O rack
- 2 series of 8 RTD inputs, for a total of 16 RTD inputs
- number 12 AWG wires for two I/O terminal blocks
- Optional Ground Wiring
Any RTD multiplexing that takes place on the IS200VRTDH1B terminal board is arranged by a number of pacemakers classified as "redundant." This ensures that the loss of any one single cable or VRTD Terminal board does not cause the loss of any additional RTD signals in the drive assembly's greater control database. One other mentionable piece of hardware crucial to the normative functioning of this IS200VRTDH1B VME Resistor Temperature Device exists in the board assembly's attached VCO-type A/D converter. The VRTD-abbreviated board uses this component to excite voltage in both frequency converters and sampling counters. This converter features high-speed processing power, as it can sample each detected signal and signal excitation current four times per second during normal mode scanning. This is only dwarfed by the VCO A/D converter's 25 times per second fast mode scanning rate. A final mentionable hardware specification for this IS200VRTDH1B model exists in its three LEDs at the top of the face plate, all designed to indicate circuit board status information. The normal RUN condition is indicated by a flashing green indicator, while the concerning FAIL LED glows solid red when a functional fault is encountered. The third LED is usually inapplicable, but may glow a bright orange when encountered with a diagnostic alarm condition, as defined in original factory-issued manual informational materials.
All of the hardware component parts available on the base board of the IS200VRTDH1B should be protected by a chemically-applied layer of conformal-style printed circuit board coating. Conformal PCB coating, while significantly thinner than the normal PCB coating alternative, is a much more exhaustive form of circuit board coating that completely envelops every hardware component on the base plate of the IS200VRTDH1B PCB. The pertinent conformal-style PCB coating standard to this Mark VI Speedtronic Series model was discovered through a careful IS200VRTDH1B product number breakdown, as outlined in the IS200VRTDH1B Part Number Breakdown attached above in the manuals tab.
