AUMA AC 01.2 User Manual

Setting values:
Function not active
<Auto change-over I/O (fieldbus failure> function deactivated.
Function active
<Auto change-over I/O (fieldbus failure> function activated.
8.11. By-pass function
Application
The by-pass function is used, e.g. for district heating pipelines. Under high pipeline
pressure, the gate valve of the main valve cannot be used, pressure compensation
via by-pass valve is therefore required.
Requirements
●
<Additional inputs> or additional <Parallel interface>.
Function
Two MOVs – one main valve and one by-pass valve – are linked via enable signals
Bypass Sync In and By-pass Sync Out. Operation commands can only be executed
if one of the two actuators sends the enable signal to the other device. Enable
depends on the end position.This ensures that only the following operation commands
may be executed:
●
The main valve can only be operated in directions OPEN or CLOSE if the by-
pass valve is in end position OPEN.
Figure 42: Function
Table 9: Main valve reaction to by-pass valve position
Main valveBy-pass valve
Release
(available operation commands)
Enable signal
Bypass Sync OUT
Position
in directions OPEN and CLOSEHigh level (release)
(Default: +24 V DC
End position OPEN
No operation possible
1)
Low level (interlock)
(0 V DC or input open-circuit):
Other position
In case of an operation command, the "Interlock by-pass" signal is sent (no release).1)
66
Actuator controls
Application functions AC 01.2/ACExC 01.2 Profinet

AUMA AC 01.2 Specifications

General

Brand	AUMA
Model	AC 01.2
Category	Control Unit
Language	English