Encoder and resolver signal conditioners accept encoder and resolver measurements and convert or condition these signals into digital data or suitable levels. Important parameters to consider when selecting encoder and resolver signal conditioners include the input specifications, device configuration, form factor, user interface, connection to host, and features.

Specifications

Important input specifications to consider for encoder and resolver signal conditioners include input channels, input signals, sampling frequency, and excitation. Differential channels use the difference between two signals as an input; common mode is filtered out. In some systems, differential inputs are combinations of two single-ended inputs; in this case, twice the number of differential channels would be available as single-ended inputs. The input signal can be DC voltage, DC current, AC voltage, and AC current. The sampling frequency is the frequency of analog signal sampling and conversion to a digital value.  Excitation can be voltage excitation or current excitation.

Features

Choices for encoder and resolver signal conditioners configuration include:

• data acquisition computer board
• input module
• signal filter
• instrumentation amplifier
• output module
• I/O module
• sample-and-hold amplifier
• isolation amplifier
• signal isolator
• multiplexer
• bridge conditioners
• analog-to-digital converters
• digital-to-analog converters
• frequency converters or translators
• voltage converter or inverters
• frequency-to-voltage converters
• voltage-to-frequency converters
• current-to-voltage converters
• current loop converters
• charge converters  

Common form factors available for encoder and resolver signal conditioners include IC or board mount, circuit board, panel or chassis mount, modular bay or slot system, rack mount, DIN rail, and stand-alone.  Choices for user interface include none, front panel and display, touch screen, hand-held or remote programmer, and computer programmable. Encoder and resolver signal conditioners that can be connected to a host are connectable by direct backplane interface, RS232, RS422, RS485, USB, IEEE 1394, GPIB, SCSI, TTL, parallel interface, Ethernet, modem, or radio or telemetry. 

Related Information

CR4 Community—Encoder/Proximity Switch

Image credit:

Ametek Solartron Metrology