INFICON VGC401 Single-Channel Controller - Manual (Page 54)

54
tinb01e1-f (2011-07) VGC401.om
Test of the two relays of the VGC401. 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 sensor cables and control
system lines to ensure that no control com-
mands or messages 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 (
→ 23). 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
Test of the RS232C interface. The VGC401 repeats each
sign transmitted by the communicating HOST.
The data transferred from/to the VGC401 can
be displayed by the computer only
(
→ Section 5).
Test sequence
The test runs automatically.
I/O test
RS232C test