Isolated Industrial Signal Conditioning Potentiometer (string pot) Amplifier

Interfaces to Potentiometers Up to 10,000Ω
High Level Voltage Outputs
1500Vrms Transformer Isolation
ANSI/IEEE C37.90.1-1989 Transient Protection
Input Protected to 240VAC Continuous
160dB CMR
95dB NMR at 60Hz, 90dB at 50Hz
CSA Certified

Each DI-5B36 potentiometer input module provides a single channel of potentiometer input which is filtered, isolated, amplified, and converted to a high level analog voltage output. This voltage output is logic-switch controlled, allowing these modules to share a common analog bus without the requirement of external multiplexers.

The DI-5B36 module is designed with a completely isolated computer side circuit that can be floated to ±50V from power common (pin 16). This complete isolation means that no connection is required between I/O common and power common for proper operation of the output switch.

Excitation for the potentiometer is provided from the module by two matched current sources. When using a three-wire potentiometer, this method allows cancellation of the effects of lead resistances. The excitation currents are very small (less than 1.0mA) which minimizes self heating of the potentiometer.

Signal filtering is accomplished with a six-pole filter, which provides 95dB of normal-mode rejection at 60Hz and 90dB of rejection at 50Hz. Two poles of this filter are on the field side of the isolation barrier, and the other four are in the output stage.

After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.

A special input circuit on the DI-5B36 provides protection against accidental connection of power-line voltages up to 240VAC.

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Part #	Price	Order
DI-5B36-01 0Ω to 100Ω input range.	$205	Quantity:
DI-5B36-02 0Ω to 500Ω input range.	$205	Quantity:
DI-5B36-03 0Ω to 1kΩ input range.	$205	Quantity:
DI-5B36-04 0Ω to 10kΩ input range.	$205	Quantity:
Accessories Backplanes and Power Supplies.	N/A	Go to Accessories

Note: Pricing outside the U.S. will be higher to account for shipping, taxes, duty, currency fluctuation, local warranty and technical support in your country.
DI-5B Signal Conditioners have typical lead times of 2 weeks ARO.
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DI-5B Modules

DI-5B30 Analog Voltage Input Modules (±10mV to ±100mV), Narrow Bandwidth
DI-5B31 Analog Voltage Input Modules (±1V to ±40V), Narrow Bandwidth
DI-5B32 Analog Current Input Modules
DI-5B33 Isolated True RMS Analog Voltage Input Modules
DI-5B34 Linearized 2- or 3-Wire RTD Input Modules
DI-5B35 Linearized 4-Wire RTD Input Modules
DI-5B36 Potentiometer Input Modules
DI-5B38 Strain Gage Input Modules
DI-5B38-100 Programmable Strain Gage Signal Conditioner
DI-5B40 Analog Voltage Input Modules (±10mV to ±100mV), Wide Bandwidth
DI-5B41 Analog Voltage Input Modules (±1V to ±40V), Wide Bandwidth
DI-5B42 2-Wire Transmitter Interface Modules
DI-5B43 Isolated DC Transducer Amplifier Input Modules
DI-5B45 Frequency Input Modules
DI-5B47 Linearized Thermocouple Input Modules
DI-5B48 Accelerometer Input Module
DI-5BICP Amplifiers for ICP-style Piezoelectric Transducers
DI-5B Module Accessories (backplanes and power supply)

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