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SPECIFICATIONS:
Part Number: IS420PVIBH1BB
Manufacturer: General Electric
Series: Mark VIe
Product Type: Vibration Monitor I/O Module
Number of input channels: 24
Number of relay channels: 12
Input Type: 4-20 mA
Number of Channels: 8-16 channels
Trip Solenoid Rating: 125 V dc
Sampling Rate: 20 kHz
Span: -8 mV to +45 mV
Power supply voltage: 28 V dc
Voltage Range: 18 - 32 VDC
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: 40 to 70 Deg Celsius
Size: 168 x 150 x 55 mm
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
IS420PVIBH1BB is a Vibration Monitor I/O Module manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The Vibration Monitor (PVIB) pack provides the electrical interface between one or two I/O Ethernet networks and the TVBA vibration terminal board. The pack contains a processor board common to all Mark* VIe distributed I/O packs, an acquisition board, and a daughterboard. The pack uses channels 1 through 8 to read vibration or proximity information from the following sensor types: Proximitors, accelerometers with an integrated output (Channels 1-3 only). Velomotor, or seismic. Channels 9 through 12 only support proximitors, and channel 13 can input either a Keyphasor signal-type or a proximity-type signal.
Input to the pack is through dual RJ45 Ethernet connectors and a 3-pin power input. The PVIB supports dual Ethernet networks for frame rates slower than 100 Hz. It supports a single Ethernet network for frame rates of 3.125, 6.25, 12.5, 25, 50, and 100 Hz. Output is through a DC-37 pin connector that connects directly with the associated terminal board connector. Visual diagnostics are provided through indicator LEDs, and local diagnostic serial communications are possible through an infrared port.
OPERATION:
The processor board connects to an acquisition board specific to the I/O pack function. Upon application of input power, the soft-start circuit ramps up the voltage available on the processor board. The local power supplies are sequenced, and the processor reset is removed. The processor completes self-test routines and then loads application code specific to the I/O pack type from flash memory. The application code reads board ID information to ensure the correct matching of the application code, acquisition board, and terminal board. With a good match, the processor attempts to establish Ethernet communications, starting with the request of a network address. The address request uses the industry standard dynamic host configuration protocol (DHCP) and the unique identification read from the terminal board. After Ethernet initialization, the processor programs the on-board logic, run the application, and enables the acquisition board to begin operation. The processor board in the pack is common to all Mark VIe Ethernet I/O packs. It contains the following:
VIBRATION MONITORING HARDWARE
The analog processing board, KAPA, has the A/D conversion, the digital-to-analog (D/A) conversion, and the digital pre-processing for the PVIB. The A/D block has 16 channels, sampling at a frequency of 80 kHz with 14-bit A/Ds. The digital pre-processing is handled by a field-programmable gate array (FPGA). The FPGA reads the A/Ds, digitally filters the sampled signals and the information is passed on to micro microprocessor memory. The FPGA also runs the high-frequency section of the tracking filter and the 1x and 2x functions. The tracking filter is used to determine the vibration content of a turbine caused by a given rotation speed. The Ix vibration is the peak-to-peak magnitude of the radial movement in sync with the turbine shaft speed. The 1x calculation also provides the phase relationship of the vibration phasor relative to the Keyphasor. The 2x calculation provides the radial vibration component that is at twice the speed of the shaft.
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What types of sensors are compatible with this module?
The module is compatible with 4-20 mA analog sensors, velocity transducers, accelerometers, and proximity probes. This allows flexible integration with existing turbine monitoring setups.
What outputs does the module provide?
It provides both analog outputs (4-20 mA) for integration with control systems and digital relay outputs for triggering alarms or shutdowns. This ensures a timely response to critical vibration events.
How is the module integrated with Distributed Control Systems (DCS)?
The module communicates via standard interfaces such as PROFIBUS, Modbus, or proprietary DCS protocols. This enables seamless integration for monitoring, diagnostics, and data logging.
