Installation, Operating & Maintenance Instructions
Series 650, DN 100 – 250 (I.D. 4" - 10")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email reception@vat.ch www.vatvalve.com
258550EE
2007-05-11
46/51
5.2 Option board
The option board may or may not be equipped in your valve depending on the order. Refer to page 1 of this manual to
check valve version. This board includes the optional modules for the valve which are:
• ±15VDC sensor power supply (SPS)
• Power failure option (PFO)
It is available in 3 versions. These are:
• SPS module only
• PFO module only
• SPS and PFO module
The modules may be retrofitted or replaced easily. The battery lifetime of the PFO module depends on the ambient
temperature (see below). To assure PFO function the option board must be replaced after battery life has expired.
For ordering number of the modules refer to «7 Spare parts and accessories».
5.2.1 Durability of power fail battery
0
20
40
60
80
100
120
20 25 30 35 40 45 50
Ambient temperature [°C]
Durability [months]
w/o SPS module,
valve unheated
with SPS module,
valve unheated
w/o SPS module,
valve heated
with SPS module,
valve heated
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