Burkert Type 8611 - Manual (Page 54)

54
FunctionsoftheConfigurationLevel
Bleed valve
(NO operating principle = Normally open / opened with no current)
Aeration valve
(NC operating principle = Normally closed / closed with no current)
Figure 35: Control block 8810 for control of the process valve
If control valves other than those of Type 8810 are used, the opening time specified in the data sheet for " TMN1"
or the closing time for " TMN2" can be used.
To ensure that the process valve moves automatically into closed position in the event of a power failure, observe
the operating principle of the control valves:
• Control valve for aeration = NC operating principle / Normally closed ( closed with no current)
• Control valve for deaeration = NO operating principle / Normally Open (opened with no current)
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Type 8611