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93AA46 , 1K/2K/4K 1.8V Microwire Serial EEPROM
93AA46 , 1K/2K/4K 1.8V Microwire Serial EEPROM
93AA66 , 1K/2K/4K 1.8V Microwire Serial EEPROM
93AA76C , 8K Microwire Compatible Serial EEPROM
93C06 , 256 Bit/1K 5.0V CMOS Serial EEPROM
93C06 , 256 Bit/1K 5.0V CMOS Serial EEPROM
7B33-01-2
Isolated Voltage Input Signal Conditioning Module -100 Hz Bandwidth
Isolated, Voltage or Current InputRev. 0
FEATURES
Interfaces, amplifies, and filters unipolar voltage inputs.
Module provides a precision output of either +1 V to +5 V or
0 V to +10 V, linear with temperature.
Module features a nonlinearity of +0.02% maximum and an
accuracy of +0.1% maximum (+0.01% typical).
All 7B33 series modules are mix-and-match and Hot
Swappable.
APPLICATIONS
Industrial signal conditioning
Industrial signal isolation
Industrial signal filtering
PRODUCT OVERVIEW The 7B Series of signal conditioners feature small size, low cost
and a wide output voltage range for a variety of applications
including process control and factory-floor environments. The
single-channel 7B modules accept inputs from a range of
transducers and are fully rated over the extended -40oC to
+85oC industrial temperature range. All 7B Series modules are
rated for a nominal power supply input of +24 VDC; and, for
maximum flexibility, they will accept supply voltages in the +14
VDC to +35 VDC range. The input modules, with the exception
of the 7B21, provide a high-level output voltage that is factory
configured for either the +1 V to +5 V or 0 V to +10 V range.
The 7B21 is a unity gain, isolated input module with an
input/output range of +10V. Output modules are available that
provide either isolated process current or isolated bipolar
voltage output. Model 7B39 converts either a +1 V to +5 V input
to a 4 to 20 mA output or a 0 V to +10 V input to a 0-20 mA
output. The input/output ranges of the 7B39 are factory
configured. The 7B22 is a unity gain module that provides an
isolated +10V output signal. All modules have a universal pin-
out and may be readily hot-swapped under full power without
disrupting field wiring. Each module accepts analog transducer
signals and transfers them to a process control or factory data
collection system without the inherent noise, non-linearity, drift
and extraneous voltages which frequently accompany the
signals.
FUNCTIONAL BLOCK DIAGRAM Figure 1. 7B33 Functional Block Diagram
The modules feature a maximum nonlinearity of +0.02% and
are factory calibrated to guarantee a maximum accuracy
specification of +0.1%.
The 7B Series offers up to 1500 V rms continuous common
mode voltage isolation and 120 V rms of field wiring input
protection. The power supplies necessary to drive each of the
individual module’s input circuitry are internally isolated,
enabling the 7B Series modules to offer true channel-to-channel
isolation of the input signals.
The modules directly accept analog signals from
thermocouples, RTDs, current loop powered transmitters, and
other process control signals. The 7B Series modules amplify,
linearize, isolate, protect and convert the transducer output
signals to standardized analog inputs for high-level analog I/O
subsystems. The 7B Series Subsystem consists of 19-inch rack-
compatible hardware (model AC 1363), with universal
mounting backplane and a family of plug-in (up to 16 per
backplane) input and output signal conditioning modules. Four-
, eight-, and sixteen-channel backplanes are available. Each
backplane incorporates screw terminals for easy power
connections and field wiring, and includes a 25-pin D-type
connector for interfacing the high-level single-ended voltage
outputs to the user’s equipment. Gold-plated sockets are
provided on each channel of the backplane to ensure the
reliability of each module’s electrical connection.
GENERAL DESCRIPTION The 7B33 is a single-channel signal conditioning module that
interfaces, amplifies and filters unipolar voltage inputs and
provides a protected precision output of either +1 V to +5V or 0
V to +10 V. To measure a process current input, a plug-on 250Ω
current sensing resistor, Model AC1391, may be installed
directly on the 7B backplane, using available pin sockets. The
external current sense resistor allows the current loop to be
maintained even when the module is removed from the
backplane. Model 7B33 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 105 dB @
50/60 Hz is provided. Rated to operate with a nominal +24
VDC supply, Model 7B33 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 two input pins of Model 7B33 are fully protected up to 120
V rms line voltage. A one-pole 100 Hz filter preconditions the
input signal prior to amplification by a low drift input amplifier.
Amplitude modulation is used to implement transformer
isolation (1500 V rms input-to-output and power). Isolated
front-end circuitry power is supplied by a DC/DC converter.
The output section contains a two-pole low pass filter (-3 dB @
100 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.
Figure 2
7B33 Models Available
Model Input Range Output Range
7B33-01-1 +1 V to +5 V +1 V to +5 V
7B33-01-2 0 V to +5 V 0 V to +10 V
7B33-01-1 +4 mA to +20 mA1 +1 V to +5 V
7B33-01-2 0 mA to +20 mA1 0 V to +10 V
7B33 Specifications (typical @ +23°C ±5°C and Vs = +24 V dc)
Description Model 7B33
Input Range1
Standard Ranges +1 V to +5 V; 0 V to +5 V (Refer to Model Table)
Custom Ranges Not Available*
Output Range Options (RL > 2 kΩ) +1 V to +5 V or 0 V to +10 V
Accuracy1
Initial @ +25°C ±0.01% Span (±0.1% Span, maximum)
Nonlinearity3 ±0.02% Span, maximum
Input Offset vs. Temperature N/A4
Span vs. Temperature ±15 ppm/°C
Output Offset vs. Temperature ±0.003% span/°C
Input Bias Current ±0.1 nA
Input Resistance
Power ON 2 MΩ
Power OFF 30 kΩ, minimum
Output Noise
5 MHz Bandwidth 6 mV peak
10 Hz to 100 kHz Bandwidth 0.4 mV rms
0.1 Hz to 10 Hz Bandwidth 4 µV peak
Bandwidth, -3 dB 100 Hz
Output Rise Time, 10% to 90% Span 10 ms
Common-Mode Voltage (CMV)
Input-to-Output and Power 1500 V rms continuous
Common Mode Rejection (CMR)
Input-to-Output and Power @ 50/60 Hz 105 dB
Input Transient Protection ANSI/IEEE C376.90.1-1989
IEEE-STD 472
IEC 255-4, Class II
Output Resistance < 1 Ω
Voltage Output Protection Continuous Short to Ground
Power Supply
Voltage Range, Operating +14 V dc to +35 V dc
Current +20 mA, maximum
DSensitivity ±0.0001%/% of Vs
Mechanical Dimensions 1.663" x 2.11" x 0.563" (42.24 mm x 53.6 mm x 14.3 mm)
Weight 60 grams
Environmental
Temperature Range
Operating -40°C to +85°C
Storage -40°C to +85°C
Relative Humidity, 24 hours 0 to 90% @ +60°C non-condensing
ESD Sensitivity IEC 801-2, Level 2
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
Warm-up time required to meet specifications is approximately 10 minutes. * Contact factory for OEM requirements. Model 7B33 may be used to measure a process current input by installing a 250 Ω current sensing resistor, such as Model AC1391, on the backplane. With this resistor, the current
loop is maintained even when the 7B33 module is removed from the backplane. 2Includes the combined effects of repeatability, hysteresis, and nonlinearity. Nonlinearity is calculated using best-fit straight line method. 4 Input offset term is included in the output offset specification.
Specifications subject to change without notice.
PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS
Figure 3 7B33 Input Field Connections
Table 1. Pin Function Descriptions—
Figure 4 . Model 7B Series Module, with pin-out assignments.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human
body and test equipment and can discharge without detection. Although this product features proprietary ESD
protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges.
Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
OUTLINE DIMENSIONS
Figure 5. Outline Dimensions
