7B31-05-1 Analog Devices Inc, 7B31-05-1 Datasheet - Page 2

• Manufacturer Part Number: 7B31-05-1
• Manufacturer: Analog Devices Inc

Specifications of 7B31-05-1

• Lead Free Status / RoHS Status: Not Compliant

GENERAL DESCRIPTION
The 7B31 is a single-channel signal conditioning module that
interfaces, amplifies and filters unipolar and bipolar voltage
inputs and provides a protected precision output of either +1 V
to +5 V or 0 V to +10 V. Model 7B31 features a nonlinearity of
+0.02% maximum and an accuracy of +0.1% maximum
(+0.01% typical). To accurately measure low level signals in
electrically noisy environments, 1500 V rms of galvanic
transformer-based isolation with a common mode rejection
(CMR) of 120 dB @ 50/60 Hz and a normal mode rejection
(NMR) of 60 dB @ 50/60 Hz are provided. Rated to operate
with a nominal +24 VDC supply, Model 7B31 is mix-and-match
and hot-swappable with other 7B Series input modules, so it can
be inserted or removed from any socket in the same backplane
without disturbing system power.
The floating differential input of Model 7B31 is fully protected
up to 120 V rms line voltage. A one-pole 3 Hz filter
preconditions the input signal prior to amplification by a low
drift input (1500 V rms input-to-output and power). Isolated
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Figure 2
front-end circuitry power is supplied by a DC/DC converter.
The output section contains a two-pole low pass filter (-3 dB @
3 Hz), a buffer amplifier and a power oscillator. The two-pole
output filter and subsequent buffer ensures that a low noise, low
impedance (<1Ω) signal is available at the output to drive loads
of 2 kΩ minimum.
7B31