Data Sheet

4. 0–5 V analog voltage interface for direct connection to potentiometers and
analog joysticks.
Two closed-loop feedback options:
1. 0–5 V analog voltage.
2. Frequency/tachometer digital input up to 2 MHz with 1 ms PID period.
(Open-loop control with no feedback also available.)
Simple configuration and calibration over USB with free configuration program (Windows 7,
Vista, and Windows XP compatible).
• Configurable parameters include:
• PID period and PID constants (feedback tuning parameters).
• Maximum current.
• Maximum duty cycle.
• Maximum acceleration.
• Error response.
• Input calibration (learning) for analog and RC control.
• Optional CRC error detection eliminates communication errors caused by noise or
software faults.
• Reversed power protection.
• Field-upgradeable firmware.
• Optional feedback potentiometer disconnect detection.
Included Hardware
The jrk 21v3 is available in two versions: “fully assembled” with terminal blocks and
0.1" male header pins pre-installed (left picture above), and connector-free (right
picture above). The connector-free version includes a 14×1 straight 0.100" breakaway
male header strip and two 3.5mm, 2-pin terminal blocks, but these parts are not
soldered to the board, which allows for custom installations.