Operation
GA 09.033/6.02 – (2011-07) –
©
Oerlikon Leybold Vacuum
59
I/O test
Test of the two relays of CENTER ONE. The program
tests their switching function.
Caution
Caution: The relays switch irrespective of the
pressure
Starting a test program may cause unwanted
effects in connected control systems.
Disconnect all gauge and control system lines
to ensure that no control commands or mes-
sages are triggered by mistake.
The relays switch on and off cyclically. The switching
operations are indicated optically and can be heard.
The contacts are connected to the CONTROL connector
on the rear of the housing (
→
26). Check the switching
function with an ohmmeter.
Test sequence
The test runs automatically one
time:
Ö
both relays deactivated
Ö
switching function relay
Ö
switching function relay
Ö
error relay
Ö
error relay
