Vibration Research VR10500, Hardware Manual

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VR10500 Hardware Manual 2
Hardware Overview
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The three Gigabit Ethernet ports each operate up to 1,000Mbps. The UPLINK
port connects to the workstation computer, and the two expansion ports
connect to additional controllers for higher channel count systems. The ports
support auto-negotiation, full duplex, and flow control. They also support auto
MDX operation to eliminate any requirements for crossover network cables.
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The front panel has16 BNC input connectors that support various analog input
devices including accelerometers, microphones, and external conditioners.
Each input channel supports single ended and capacitor coupled operation for
IEPE transducers and smart transducers (TEDS). Each channel includes
support for multiple input voltage ranges:
Input Voltage Range Input Impedance
0-20V peak 100 kΩ
±10V peak 100 kΩ
±1V peak 100 kΩ
±5V peak 10 MΩ
±0.5V peak 10 MΩ
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The rear panel has four BNC output connectors that support various analog
drive devices up to ±10V. For single-axis control, the DRIVE 1 port is typically
used to drive an amplifier or servo-hydraulic controller. The AUX port is
typically used to support synchronization with constant level adapter (COLA)
devices such as stroboscopes or data acquisition devices. The DRIVE 2 and
DRIVE 3 ports can be used for multi-shaker control or as additional
AUX/COLA channels. Pairs of outputs can be used to support differential
mode output.
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The digital drive output interface has two additional drive signals. They can be
used in conjunction with the four analog drive signals for six channels of
DRIVE/AUX/COLA or separately for two remote drive outputs. The digital drive
interface has several advantages over the traditional analog drive interface,
including longer cable lengths without signal degradation and higher immunity
to low and high frequency electrical noise. A separate unit is typically required
to convert the digital drive signal into an analog signal that can drive a
standard amplifier input. This unit would be located near the input to the
amplifier or servo-hydraulic controller.
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The rear panel has an interbox port for loop synchronization of multiple
VR10500 units. Loop sync can be completed with hardware or software
clocks. Hardware clocks via interbox connection are only recommended for
systems with more than 48 input channels.