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Installation, Operating & Maintenance Instructions
Series 650 DN 100-
250 (I.D. 4“ - 10”), DeviceNet
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
266341ED
2012-07-13
26/79
3.4 Behavior in case of power failure
Valve position before
power failure:
Reaction of valve:
Without Power Failure Option (PFO)
650 . . - . .
G
. - . . . .
650 . . - . .
A
. - . . . .
650 . . - . .
T
. - . . . .
650 . . - . .
V
. - . . . .
With Power Failure Option (PFO)
650 . . - . .
H
. - . . . .
650 . . - . .
C
. - . . . .
650 . . - . .
U
. - . . . .
650 . . - . .
W
. - . . . .
Closed (isolated)
Valve remains closed.
Valve will close or open depending
on valve configuration *).
Default is not defined.
Display indicates
F
.
Valve open or in any intermediate
position
Sealing ring moves down and blocks the
pendulum plate at the current position.
*) Provided that battery pack of the VAT controller is charged. Charging time after power up is 2 minutes max..
All parameters are stored in a power fail save memory.