Model 526 measures incremental encoders pulses, analog voltages and detects digital signals. It also generates analog voltages, digital outputs and has a watchdog timer and an interrupt timer.

Encoder Counters
The four quadrature encoder inputs and index inputs may be differential (RS-422) or single-ended TTL.  Counting resolution can be increased by selecting x2 or x4 counting modes.  Each counter may be programmed to cause an interrupt when it overflows. The current value of a counter may be read without affecting the counting process.

Counters may be configured as timers by counting pulses from an internal clock of 27 or 13.5 MHz.  Timers can generate a single-shot pulse or a pulse width modulated waveform at one of the digital outputs.

Watchdog Timer
If enabled, the watchdog timer times out after a selected interval if it is not tagged.  This timer can control two external solid state relays (one normally closed and one normally open).     

Interrupt Timer
This timer provides a way of generating precise interrupts.  Two operating modes are available: manual and auto-restart. In the manual restart mode the count starts on a software command and stops when the zero count is reached. In Auto-restart mode the counter automatically reloads after the zero count is reached.

Analog Outputs
The 526 has four 16-bit D/A converters with individual preload buffers.  A single command will update all D/A’s in about 32 uS.  An interrupt can optionally be generated when the upload is complete. There are no trimpots for the 526’s D/A’s. Sensoray’s factory calibration stores calibration data in an EEPROM on the 526. Precise output voltages are obtained by using this data.

Analog Inputs
The eight differential inputs are multiplexed to a 16-bit A/D. The input range is slightly larger than ±10 volts to allow for software calibration. Multiple channels can be measured with just one command. Two reference channels (0 V and 10 V) can also be measured.

The A/D converter is factory calibrated by storing the actual value of the on-board 10 V reference in the EEPROM.

Digital I/O
The 526 has eight I/O lines for use as general purpose inputs or outputs in groups of four. Interrupts can be generated on the rising or falling edge of every signal in both groups.

DC/DC Converter
The 526 requires a power supply input of just 5 volts. Its on-board DC/DC converter generates +/- 15 volts for the analog circuits and 3.3 volts for the digital circuits.

Software and Manuals

Specifications

Images and Mechanical Drawings

Prices