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L17401-CL06JEN-E2-S02, REV. C INTRODUCTION TO TROUBLESHOOTING
Copyright © 2019 Amatrol, Inc.
S02-6
SKILL 2 TEST A MANUAL SWITCH
O. Press the
Enter
key or click on the
to activate the fault.
Fault 7 is now active. You should observe that the fault status fi eld changes
from “Fault 6 is cleared” to “Fault 7 is Active.”
Fault 7 is an open in the N.O. contacts of PB1.
P. Repeat step 4 to test the pushbutton and record your measurements.
PB1 Resistance (not pressed) ___________________________ (Ohms)
PB1 Resistance (pressed) ______________________________ (Ohms)
Component Status _________________________________ (Good/Bad)
This time you should fi nd that the multimeter measures infi nite resistance
in both conditions. This means that there is an open in the contacts. The
component is bad.
Q. Click the
Clear Fault
button
to clear the fault or remove the fault plug.
With the FaultPro software, the fault will clear and the fault status fi eld
should change to “Fault 7 is cleared.”
If you are using manual fault insertion, remove the open plug from
terminal 7 and replace it with the standard jumper plug.
6. Now test the N.C. contacts of PB2. Use the same out-of-circuit test procedure
as in step 4, except the multimeter leads are inserted, as shown in fi gure 2-4.
Record your results.
PB2 Resistance (not pressed) ______________________________ (Ohms)
PB2 Resistance (pressed) _________________________________ (Ohms)
Component Status ___________________________________ (Good/Bad)
These contacts should be good. This is indicated by zero resistance when not
pressed and infi nite resistance when pressed. This is the opposite result of the
N.O. contacts.
Figure 2-4. Pushbutton PB2 N.C. Contacts In-Circuit Test
COM
Ω
Ω
OPERATOR STATION
PN 17320
EARTH
GND
SS1
PB3
PB2
PB1