... checking-power-on function, if power on, turnstile will auto get to be held. 4. Various working means can ... passing, etc. 5. If power off, arm will fall automatically while power on later, arm should be ... management can be realized by computer. 8. It will count the persons who have been passed through ... for locking the turnstile in zero, and unlocking will be more reliable and accurate. 15. Optional: 1 ...