Functional Description

5B40/41-04 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 overvoltage faults. All models withstand 240 V rms at their input terminals without damage thereby shielding computer-side circuitry from field-side overvoltage 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.

Inside 5B40/5B41 Modules
A chopper-stabilized input amplifier provides low drift and stable gain. At the amplifier input, a stable, laser-trimmed zero-scale input voltage 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 3 Vdc of power common.

Convenience Features
A series output switch eliminates the need for external multiplexing in many applications. The switch is turned on by an active-low enable input. The enable input should be grounded to power common if the output need not be switched.

5B40/5B41 FBD

Figure 1. 5B40 and 5B41 Functional Block Diagram


Input Ranges

5B40 mV Input:
±10 mV to ±100 mV
(±5 mV to ±500 mV ­ custom)

5B41 V Input:
±1 V to ±20 V
(±0.5 V to ±20 V ­ custom)

Output Ranges

-5 V to +5 V or 0 to +5 V

Figure 2. 5B40 and 5B41 Input Field Connections

5B40 and 5B41 Models Available

  Model Input Range Output Range
Order Now5B40-01-10 mV to +10 mV-5 V to +5 V
Order Now5B40-02-50 mV to +50 mV-5 V to +5 V
Order Now5B40-03-100 mV to +100 mV-5 V to +5 V
Order Now5B40-04-10 mV to +10 mV0 V to +5 V
Order Now5B40-05-50 mV to +50 mV0 V to +5 V
Order Now5B40-06-100 mV to +100 mV0 V to +5 V
  Model Input Range Output Range
Order Now5B41-01-1 V to +1 V-5 V to +5 V
Order Now5B41-02-5 V to +5 V-5 V to +5 V
Order Now5B41-03-10 V to +10 V-5 V to +5 V
Order Now5B41-04-1 V to +1 V0 V to +5 V
Order Now5B41-05-5 V to +5 V0 V to +5 V
Order Now5B41-06-10 V to +10 V0 V to +5 V
Order Now5B41-07-20 V to +20 V-5 V to +5 V

* Custom Input/Output ranges are available. Refer to configuration guide.

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5B40 and 5B41 Specifications
Description Model 5B40 Model 5B41
Input Ranges
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
Input Resistance
Power On200 MΩ650 kΩ
Power Off40 kΩ650 kΩ
Overload40 kΩ650 kΩ
Input, 0.1 Hz to 10 Hz Bandwidth0.4 µV rms2 µV rms
Output, 100 kHz Bandwidth10 mV peak-peak*
Bandwidth, -3 dB10 kHz*
Output Rise Time, 10% to 90% Span35 µs*
Common-Mode Voltage (CMV)3
Input-to-Output, Continuous1500 V rms, maximum*
Output-to-Power, Continuous±3 V maximum*
TransientANSI/IEEE C37.90.1-1989*
Common-Mode Rejection (CMR)
1 kΩ Source Imbalance, 50/60 Hz100 dB90 dB
Normal Mode Rejection-3 dB @ 10 kHz*
Input Protection
Continuous240 V rms, maximum*
TransientANSI/IEEE C37.90.1-1989*
Output Resistance50 Ω*
Voltage Output ProtectionContinuous Short to Ground*
Output Selection Time6 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 Current30 mA*
Power Supply Sensitivity, RTI±2 µV/Vs%±0.4 mV/Vs%
Mechanical Dimensions2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
Temperature Range
   Rated Performance-25°C to +85°C*
   Operating-40°C to +85°C*
   Storage-40°C to +85°C*
Relative Humidity0 to 93% @ +40°C noncondensing*
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.
2 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.

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