STP-iX457/iXU457 Series Turbomolecular Pump
MT-86E-001-F
Page 132
7
SAFETY FUNCTIONS
Table 36 shows the states of LED output and the "X2 REMOTE" output signals at a power failure.
Rotational speed
Duration of
power failure
STATUS LED
REMOTE output signal (X2 REMOTE)
ALARM
N.O. N.C.
24,000 rpm or more
Approx. 2 sec.
or longer
Flash in red Close Open
Shorter than
approx. 2 sec.
Continues as before
Less than 24,000 rpm
Extinguish Open Open
Table 36 - States of LEDs and X2 REMOTE output signals at power failure
7.1.2 Operation after a power recovery
1. The STP pump continues decelerating, and power failure detection is reset automatically.
At this time, the "STATUS" LED will change from red flash to orange flash.
Also, a failure signal is reset between FAILURE OUT pins (10)-(14) of the "X2 REMOTE"
connector.
2. When the START signal is input after a power recovery, the STP pump reaccelerates even while
it is in BRAKE state.
When the START signal is input after a power recovery, the STP pump reaccelerates even while
it is in BRAKE state.
However, the control unit may detect excessive vibration when power is recovered after the rotor
lands on the touch down bearing (see 7.1.4). In this case, the STP pump once stops and cannot
reaccelerate until the RESET operation completed (see Section 4.6.2).
Note: It is recommended to establish a procedure so that the power can be supplied to the STP
pump immediately after a power recovery.
To Next Page
Loading...
Need help?
General
