1781-7B30-02
Categories: Analog Signal Conditioning, I/O Modules- Part Type - dc mV input
- Input Range - 0 to +100 mV
- Output Range - 0 to +10 V
- Bandwidth - 3 Hz
- Accuracy Typical - ±0.05%
- Input Resistance - 50 MΩ min

Part Type | |
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Input Range | |
Output Range | |
Bandwidth | 3 Hz |
Accuracy Typical | ±0.05% |
Input Resistance | 50 MΩ min |
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Part Type | |
---|---|
Input Range | |
Output Range | |
Bandwidth | 3 Hz |
Accuracy Typical | ±0.05% |
Input Resistance | 50 MΩ min |
17 Series Features:
- Accepts most process control input signals
- +24 V for a transmitter
- Analog current output module
- Complete signal conditioning function: 120 V rms field wiring protection, filtering, amplifica-tion, 1500 V rms galvanic isolation
- Pin compatible to industry stan-dard solid-state relays
- Operates from 24 V dc (+14 V dc to +35 V dc) power
- Factory-calibrated accuracy to±0.1%
- Mix-and-match modularity
Part Type | |
---|---|
Input Range | |
Output Range | |
Bandwidth | 3 Hz |
Accuracy Typical | ±0.05% |
Input Resistance | 50 MΩ min |
System Flow Chart:

Schematics Chart:

Part Type | |
---|---|
Input Range | |
Output Range | |
Bandwidth | 3 Hz |
Accuracy Typical | ±0.05% |
Input Resistance | 50 MΩ min |
Benefits of Isolated Signal Conditioning
- Reduces the demands on the software to linearize the signal
- Produces a voltage or current that is directly usable by a display device
- Simplifies system design and reduces parts and cost
- Increases reliability
- More accurate data acquisition
- Shortens system start up time
- Protects operators
- Protects the data acquisition hardware and the computer
- Minimizes errors caused by common mode voltage
- Minimizes or eliminates errors caused by electro-magnetic interference
- Protects equipment and personnel from improper wiring, power surges and other faults
- Simplifies installation
- Reduces troubleshooting and repair time
- Reduces noise from AC power lines, florescent lights, motors, etc.
- Minimizes initial outlay
- Facilitates future expansion
- Maximizes the resolution and accuracy of the reading over small signal spans
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Linearizes Thermocouple and RTD signals
- Provides sensor excitation for RTDs, strain gages and transmitters
- Eliminates ground loops
- Isolates the field from the computer
- Amplifies the low level sensor signal outside of the electrically noisy computer chassis
- Provides over-voltage protection
- Provides convenient screw terminals for field wiring
- Filters out unwanted noise
- Mixes and matches many sensor types on one back-plane
- Customizes the full range of the module to match the sensor signal range
Part Type | |
---|---|
Input Range | |
Output Range | |
Bandwidth | 3 Hz |
Accuracy Typical | ±0.05% |
Input Resistance | 50 MΩ min |
1781-7B Series Input and Output Modules General Information:
The 1781-7B Series represents Western Reserve Controls ongoing commitment to provide cost-effective, isolation-based signal conditioning solutions for the process control industries. The 1781-7B Series is a family of modular, single-channel, plug-in signal conditioning modules that accept inputs from a wide range of process control transducers and signals while providing high-level output voltages or process control currents.
Performance Optimized for Process Control
Featuring a maximum nonlinearity of ±0.02% and factory calibration that guarantees an initial accuracy specifica-tion of ±0.1%, the 1781-7B Series offers superior performance at a lower cost than existing multipurpose signal condi-tioners or in-house designs. Other family features include 160 dB of common-mode rejection, 60 dB of normal-mode rejection, up to 1500 V rms of isolation, and 120 V rms of field wiring protection. Short circuit and input overvoltage pro-tection are built-in and the proprietary isolation transformer circuit design of the 1781-7B Series provides for true channel-to-channel isolation.
CE Approval
European CE approvals EMC directive compliant. Low voltage directive is not applicable. Products comply with ENG1010-1 (IEC1010.)
Rated to Operate in the Industrial Environment
All 1781-7B Series modules are packaged in compact, rugged, 2.1" x 1.7" x 0.6" (54 mm x 42 mm x 14 mm) plastic cases that readily accommodate high channel density applications. The modules are rated over the extended -40°C to +85°C industrial temperature range; and they may be operated in noncondensing, high humidity environments. 1781-7B Series modules can be removed and/or inserted into the backplane without damage to the modules when the power supplies are energized.
Unregulated 24 V dc Linear Power Supplies
The 1781-7B Series is rated for a nominal power supply input of +24 V dc; and, for maximum flexibility, it will accept supply voltages in the +14 V dc to +35 V dc range. Consequently, system perfor-mance will not degrade with the use of unregulated supplies. Linear supplies are recommended for better noise rejection. Redundant power supply configurations are available.
Hardware
The 1781-7B Series is complemented by a full line of backplanes (1, 4-, 8-, 16-channel) and rackmount hardware. Each backplane contains screw terminals for field wiring connections, and a miniature cold junction compensation thermistor is installed under the screw terminal blocks for each channel. The 1781-7B Series’ simplified pinout ensures that this thermistor compensates the input signals for the thermocouple modules only. Consequently, any module type may be used in any channel on the backplane.