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Isolated Wide Bandwidth mV Input Signal Conditioning ModuleIsolated, Wide Bandwidth Millivolt and
Isolated Analog Input Voltages.
Amplifies, Protects, and Filters Analog Input.
10kHz bandwidth which ideally suits them to measuring
signals that vary rapidly with time.
Generates an output of -5V to +5V.
Module circuitry can withstand 240v rms at the input screw-
All 5B40 & 5B41 series modules are mix-and-match and Hot
Industrial signal conditioning
Industrial signal isolation
Industrial signal filtering
The 5B Series represents an innovative generation of low cost,
high performance plug-in signal conditioners. Designed for
industrial applications, these modules incorporate highly
reliable transformer-based isolation and automated surface-
mount manufacturing technology. They are compact,
economical components whose performance exceeds that
available from more expensive devices. Combining 1500 V rms
continuous isolation, +0.05% calibrated accuracy, small size and
low cost, the 5B Series is an attractive alternative to expensive
signal conditioners and in-house designs
All modules are potted and identical in pin-out and size (2.27” x
2.32” x 0.595”). They can be mixed and matched, permitting
users to address their exact needs, and may be “hot swapped
without disturbing field wiring or power. The isolated input
modules provide 0 to +5V or +5V outputs and accept J, K, T, E,
R, S, N, or B type thermocouples.
These modules feature complete signal conditioning functions
including 240 V rms input protection, filtering, chopper
stabilized low drift +1 uV/oC amplification, 1500 V rms
isolation, and sensor excitation when required.
All modules feature excellent common mode rejection and
meet industrial transient surge withstand specifications.
FUNCTIONAL BLOCK DIAGRAM
Figure 1. 5B40 and 5B41 Functional Block Diagram
There are also a number of backplanes and mounting sockets
which provide a complete signal conditioning solution for end
users. Each backplane incorporates screw terminals for field
wiring inputs and outputs and cold junction sensors for
These signal conditioners are designed to provide an easy and
convenient solution to signal conditioning problems of both
designers and end users in measurement and control
applications. Typical uses include microcomputer-based
measurement systems, standard data acquisition systems,
programmable controllers, analog recorders and dedicated
control systems. The 5 B series modules are ideally suited to
applications where monitoring and control of temperature,
pressure, flow, rotation and other analog signals are required.
The 5B Series modules and backplanes are approved by Factory
Mutual (FM) and the 5B Series modules are approved by the
Canadian Standards Association (CSA) for use in Class 1,
Division 2, Groups A, B, C, and D locations. These approvals
certify that the 5B Series is suitable for use in locations where a
hazardous concentration of flammable gas may exist only under
fault conditions of operation. Equipment of this category is
called “nonincendive” and they need no special enclosures or
other physical safeguards.
The 5B series modules and backplanes have been tested and
passed the stringent heavy industrial requirements of the
European Union’s electromagnetic compatibility (ENC)
directive – EN50082-1 and EN50081-2. When used according
to installation directions (refer to 5B series User Manual), any
errors caused by EMI/RFI interference will be less than 0.1% of
the full scale 5B measurement range for field strengths up to 10
V/M and frequencies up to 1 GHz. GENERAL DESCRIPTION
The 5B40 and 5B41 are wide-bandwidth single-channel signal
conditioning modules that amplify, protect, filter and isolate
analog input voltages. Both modules provide a 10 kHz
bandwidth which ideally suits them to measuring signals that
vary rapidly with time. Examples include pressure inside a
plastic injection molding machine, strain on an automobile
chassis during a crash test and vibrations on a machine bearing
shortly before failure.
The 5B40 and 5B41 protect the computer side from damage due
to field-side over-voltage faults. All models withstand 240V rms
at their input terminals without damage thereby shielding
computer-side circuitry from field-side over-voltage conditions.
In addition, 5B40 and 5B41 Series modules are mix-and-match
and hot swappable, so can be inserted or removed from any
socket in the same backplane without disrupting system power.
A chopper-stabilized input amplifier provides low drift and
stable gain. At the amplifier input, a stable, laser-trimmed zero-
scale input offset is subtracted from the input signal to set the
zero-scale value. For user convenience, the zero can be
optionally factory-set to meet custom needs, This allows
suppression of a zero-scale input value many times larger than
the total span for precise expanded-scale measurements.
A single-pole anti-aliasing filter resides at each modules input.
A three-pole, low-pass filter in the output stage sets the
bandwidth and yields optimal noise performance for accurate
measurement of small signals in high electrical noise.
Signal isolation by transformer coupling uses a proprietary
modulation technique for linear, stable and reliable
performance. The differential input circuit on the field side is
fully floating, eliminating the need for any input grounding. A
demodulator on the computer side of the signal transformer
recovers the original signal, which is then filtered and buffered
to provide a low-noise, low-impedance output signal. The
output common must be kept within 3Vdc of power common.
A series output switch eliminates the need for external
multiplexing in many applications. The switch is turned on by
an active-low enable input. If the switch is to be on at all times,
the enable-input should be grounded to power common as it is
on the 5B01 and 5B08 backplanes.
5B40 and 5B41 Models Available
Model Input Range Output Range
5B40-01 -10 mV to +10 mV -5 V to +5 V
5B40-02 -50 mV to +50 mV -5 V to +5 V
5B40-03 -100 mV to +100 mV -5 V to +5 V
5B40-04 -10 mV to +10 mV 0 V to +5 V
5B40-05 -50 mV to +50 mV 0 V to +5 V
5B40-06 -100 mV to +100 mV 0 V to +5 V
5B40-Custom * * Model Input Range Output Range
5B41-01 -1 V to +1 V -5 V to +5 V
5B41-02 -5 V to +5 V -5 V to +5 V
5B41-03 -10 V to +10 V -5 V to +5 V
5B41-04 -1 V to +1 V 0 V to +5 V
5B41-05 -5 V to +5 V 0 V to +5 V
5B41-06 -10 V to +10 V 0 V to +5 V
5B41-07 -20 V to +20 V -5 V to +5 V
5B41-Custom * *
* Custom Input/Output ranges are available. Refer to configuration guide.
5B40 and 5B41 Specifications
Description Model 5B40 Model 5B41
Standard Ranges ±10 mV to ±100 mV ±1 V to ±20 V
Custom Ranges ±5 mV to ±500 mV ±0.5 V to ±20 V
Output Ranges (RL > 50 kΩ)4 -5 V to +5 V or 0 V to +5 V *
Initial @ +25°C ±0.05% Span ±10 µV RTI ±0.05% (Vz1) ±0.05% Span ±0.05% (Vz1)
Nonlinearity ±0.02% Span *
Input Offset vs. Temperature ±1 µV/°C ±20 µV/°C
Output Offset vs. Temperature ±40 µV/°C *
Gain vs. Temperature ±25 ppm of Reading/°C ±50 ppm of Reading/°C
Input Bias Current ±3 nA ±0.2 nA
Power On 200 MΩ 650 kΩ
Power Off 40 kΩ 650 kΩ
Overload 40 kΩ 650 kΩ
Input, 0.1 Hz to 10 Hz Bandwidth 0.4 µV rms 2 µV rms
Output, 100 kHz Bandwidth 10 mV peak-peak *
Bandwidth, -3 dB 10 kHz *
Output Rise Time, 10% to 90% Span 35 µs *
Common-Mode Voltage (CMV)3
Input-to-Output, Continuous 1500 V rms, maximum *
Output-to-Power, Continuous ±3 V maximum *
Common-Mode Rejection (CMR)
1 kΩ Source Imbalance, 50/60 Hz 100 dB 90 dB
Normal Mode Rejection -3 dB @ 10 kHz *
Continuous 240 V rms, maximum *
Transient ANSI/IEEE C37.90.1-1989 *
Output Resistance 50 Ω *
Voltage Output Protection Continuous Short to Ground *
Output Selection Time 6 µs @ Cload = 0 to 2,000 pF *
Output Enable Control
Max Logic "0" +1 V *
Min Logic "1" +2.5 V *
Max Logic "1" +36 V *
Input Current "0" 0.4 mA *
Power Supply Voltage +5 V ±5% *
Power Supply Current 30 mA *
Power Supply Sensitivity, RTI ±2 µV/Vs% ±0.4 mV/Vs%
Mechanical Dimensions 2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
Rated Performance -25°C to +85°C *
Operating -40°C to +85°C *
Storage -40°C to +85°C *
Relative Humidity 0 to 93% @ +40°C non-condensing *
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft *
* Specifications same as model 5B40. 1 Vz is the nominal input voltage that results in a 0 V output. Includes the combined effects of repeatability, hysteresis, and nonlinearity and assumes RL > 50 kΩ. Loads heavier than 50 kΩ will degrade nonlinearity and gain temperature
coefficient. 3 The output common must be kept within ±3 V of power common.
Specifications subject to change without notice.
PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS
Figure 3 5B40 & 5B41 Input Field Connections
Table 1. Pin Function Descriptions—
Figure 4 . Model 5B Series Module, with pin-out assignments.
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.
Figure 5. Outline Dimensions