Somat eDAQlite, Руководство пользователя

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Somat eDAQ
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Figure 5-4: Diagram of the M8 connectors on an ELBRG layer.
Each independent channel contains programmable excitation, an eight-pole
Butterworth analog guard filter, a 16-bit A/D converter, software selectable digital
filtering and output sample rate options of up to 100 kHz.
The ELBRG layer supports full- and half-bridge types with a resistance from 100 to
10000 ohms and quarter-bridges with a resistance of either 120 or 350 ohms. All
bridge configurations are accomplished using programmable switches (i.e., there are
no jumpers), however, the quarter-bridge choice of 120- or 350-ohm completion
resistor is a factory installed option. A set of internal shunt resistors with selectable
shunt direction is available for calibration purposes.
For more information on setting up ELBRG input channels, see
“Bridge” on page 113 .
For information on wiring ELBRG inputs, see “ELBRG (Bridge Layer)” on page 206 .
5.5 ELHLS (High Level Analog Layer)
The ELHLS offers four simultaneously sampled, high-level, differential analog inputs
through independent connectors. The ELHLS layer supports a wide variety of inputs
including thermocouples, strain gages, accelerometers, microphones and amplified
and unamplified transducers. Single channel IEPE (Integral Electronics Piezoelectric)
adapters and a variety of SMART modules are also available. Connect transducers to
the ELHLS individually using the M8 connectors located on the front panel.
Figure 5-5: Diagram of the M8 connectors on an ELHLS layer.
Each independent channel contains programmable transducer power, an eight-pole
Butterworth analog guard filter, a 16-bit A/D converter, software selectable digital
filtering and output sample rate options of up to 100 kHz. The ELHLS also provides
400 milliwatts of transducer power supply with an adjustable supply voltage of 4-15
volts for every channel. Use the transducer power supplies in parallel for larger loads.
For more information on setting up ELHLS input channels, see
“Simultaneous High
Level” on page 116 . For information on wiring ELHLS inputs, see “ELHLS (High Level
Analog Layer)” on page 205 .
5.6 ELNTB (Non-Isolated Thermocouple Layer)
The ELNTB provides non-isolated thermocouple inputs in one bank (A) of 16
channels. The ELNTB supports the four most common thermocouple types: J, K, T
and E. The user-specified thermocouple type for each channel is independent of the
other channels. The 16 channels share a common cold junction resulting in high
channel-to-channel accuracy, which is particularly valuable when measuring thermal
gradients.
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