Edwards SCU-350 Series

SCU-350 Series Control Unit for Turbomolecular Pump
MT-21E-201-E
Page 50
4
OPERATION
Pin Description
(2) (14)
RESET IN
+ -
Pins for inputting the RESET signal.
When inputting 24VDC between (2)-(14) for 0.3 seconds or more, the
"FAILURE" LED is turned off.
Connect the (+) side to (2), and the (-) side to (14).
(It is an equivalent to the pin for inputting the "POWER OFF" signal of the
STP-200/300/400 series.)
(3) (15)
START IN
+ -
Pins for inputting the START signal.
When inputting 24VDC between (3)-(15) for 0.3 seconds or more, the pump
starts operation.
However, when inputting the signal simultaneously with switching "ON" the
breaker on the rear panel, continue to short the circuit for 5 seconds or
more.
Connect the (+) side to (3), and the (-) side to (15).
(4) (16)
STOP IN
+ -
Pins for inputting the STOP signal.
This STOP signal has priority over the START signal.
When inputting 24VDC between (4)-(16) for 0.3 seconds or more, the pump
stops operation.
Connect the (+) side to (4), and the (-) side to (16).
(1) (13)
Not used.
(It corresponds to the pin for inputting the "POWER ON" signal of the
STP-200/300/400 series.)
Table 11 - CON4 connector (Remote input signal)