Single-Channel Signal Conditioning Module
5B32
FEATURES
Isolated Current Input.
Amplifies, Protects, Filters, and Isolates Analog Input. Measure process-current input signal of 4-20 mA or 0-20 mA by reading the voltage across an external precision 20Ω resistor (supplied).
Generates an output of 0 to +5V.
Extra Current Conversion resistors are available.
Module circuitry can withstand 240v rms at the input screwterminals.
All 5B32 series modules are mix-and-match and Hot Swappable.
APPLICATIONS
Industrial signal conditioning
Industrial signal isolation
Industrial signal filtering
FUNCTIONAL BLOCK DIAGRAM
Figure 1. 5B32 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 thermocouple applications.
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These signal conditioners are designed to provide an easy and |
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PRODUCT OVERVIEW |
convenient solution to signal conditioning problems of both |
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MacshbM |
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The 5B Series represents an innovative generation of low cost, |
designers and end u ers in measurement and control |
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ppli ations. Typical u es include microcomputerased |
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high performance plug-in signal conditioners. Designed for |
measurement sy tem , tandard data acquisition systems, |
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industrial applications, these modules incorporate highly |
programmable controllers, analog recorders and dedicated |
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reliable transformer-based isolation and automated surface- |
control systems. The 5 B series modules are ideally suited to |
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mount manufacturing technology. They are compact, |
applications where monitoring and control of temperature, |
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economical components whose performance exceeds that |
pressure, flow, rotation and other analog signals are required. |
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available from more expensive devices. Combining 1500 V rms |
The 5B Series modules and backplanes are approved by Factory |
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continuous isolation, +0.05% calibrated accuracy, small size and |
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low cost, the 5B Series is an attractive alternative to expensive |
Mutual (FM) and the 5B Series modules are approved by the |
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signal conditioners and in-house designs |
Canadian Standards Association (CSA) for use in Class 1, |
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All modules are potted and identical in pin-out and size (2.27” x |
Division 2, Groups A, B, C, and D locations. These approvals |
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certify that the 5B Series is suitable for use in locations where a |
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2.32” x 0.595”). They can be mixed and matched, permitting |
hazardous concentration of flammable gas may exist only under |
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users to address their exact needs, and may be “hot swapped |
fault conditions of operation. Equipment of this category is |
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without disturbing field wiring or power. The isolated input |
called “nonincendive” and they need no special enclosures or |
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modules provide 0 to +5V or +5V outputs and accept J, K, T, E, |
other physical safeguards. |
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R, S, N, or B type thermocouples. |
The 5B series modules and backplanes have been tested and |
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These modules feature complete signal conditioning functions |
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passed the stringent heavy industrial requirements of the |
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including 240 V rms input protection, filtering, chopper |
European Union’s electromagnetic compatibility (ENC) |
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stabilized low drift +1 uV/oC amplification, 1500 V rms |
directive – EN50082-1 and EN50081-2. When used according |
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isolation, and sensor excitation when required. |
to installation directions (refer to 5B series User Manual), any |
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errors caused by EMI/RFI interference will be less than 0.1% of
All modules feature excellent common mode rejection and
the full scale 5B measurement range for field strengths up to 10
meet industrial transient surge withstand specifications.
V/M and frequencies up to 1 GHz.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies.
5B32
GENERAL DESCRIPTION
The 5B32 is a single-channel signal conditioning module that amplifies, protects, filters and isolates its analog input. The module measures a process current input signal of 4-20 mA or 0-20 mA by reading the voltage across an external precision 20W resistor (supplied) and generating an output of 0 to +5 V. Extra current conversion resistor are available as accessories (See Model AC1362 in the Accessories section).
Note that the 5B32 module circuitry can withstand 240 V rms at the input screw-terminals, thereby shielding computer-side circuitry from field-side overvoltage conditions. In addition, all 5B32 Series modules are mix-and-match and hot swappable, so can be inserted or removed from any socket in the same backplane without powering down the system.
A chopper-stabilized input amplifier provides low drift and stable gain. At the amplifier input, a stable, laser-trimmed zeroscale input offset is subtracted from the input signal to set the
zero-scale value for the 4-20 mA range. 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.
Internal multi-pole lowpass filtering with a four-Hz cutoff (- 3dB) enhances normal-mode (noise on signal) and commonmode (noise on signal return) rejection at 50/60 Hz, enabling accurate measurement of small signals in high electrical noise.
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..
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5B32
5B32—SPECIFICATIONS
5B32 Specifications
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Standard Ranges |
0 mA to 20 mA or 4 mA to 20 mA |
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Custom Ranges |
0 mA to 20 mA (refer to ordering section) |
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Output Ranges (RL > 50 kΩ)4 |
-5 V to +5 V or 0 V to +5 V |
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Initial @ +25°C |
±0.05% Span ±0.05% Iz1 |
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Nonlinearity |
±0.02% Span |
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Input Offset vs. Temperature |
±0.0025 of Iz/°C |
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Output Offset vs. Temperature |
±20 µV/°C |
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Gain vs. Temperature |
±0.0025% of Reading/°C |
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Value |
20.0 Ω |
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Accuracy |
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±0.1% |
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Stability vs. Temperature |
±0.001%/°C |
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Input, 0.1 Hz to 10 Hz Bandwidth |
10 nA rms |
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Output, 100 kHz Bandwidth |
200 µV rms |
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Bandwidth, -3 dB |
4 Hz |
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Output Rise Time, 10% to 90% Span |
200 ms |
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Input-to-Output, Continuous |
1500 V rms maximum |
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Output-to-Power, Continuous |
±3 V maximum |
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Transient |
ANSI/IEEE C37.90.1-1989 |
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1 kΩ Source Imbalance, 50/60 Hz |
160 dB |
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Normal Mode Rejection 50/60 Hz |
60 dB |
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Continuous |
240 V rms maximum |
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Transient |
ANSI/IEEE C37.90.1-1989 |
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Output Resistance4 |
50 Ω |
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Voltage Output Protection |
Continuous Short to Ground |
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Output Selection Time |
6 µs @ Cload = 0 to 2,000 pF |
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Max Logic "0" |
+1 V |
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Rev. 0 | Page 3 of 8
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