Mec 34-J Diesel, Руководство по обслуживанию и запасным частям

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Page 47 34-J Desel - Servce & Parts Manual
December 2021 Secton 15 - Contnuty Checks
Toggle Momentary Switch
Disconnect wires.
Connect first probe of ohm meter to common terminal.
Test top position
Connect second probe to top normally open terminal.
With the toggle in the neutral (open) position there should be
no reading.
With the toggle UP (closed) there should be a low resistance.
With the toggle DOWN (closed) there should be no reading.
Test bottom position
Move second probe to bottom normally open terminal.
With the toggle in the neutral (open) position there should be
no reading.
With the toggle DOWN (closed) there should be a low
resistance.
With the toggle UP (closed) there should be no reading.
Repeat for both rows of two-row switch.
•
•
•
•
•
•
•
•
•
•
•
Common
Normally Open
Normally Open
Common
Normally Open
Normally Open
ART_2563
Common
Normally Open
Normally Open
Normally Open
Normally Open
Common
Normally Open
Normally Open
Common
ART_2564
Momentary Button Switch
Disconnect wires.
Connect one probe of ohm meter each terminal.
With the button in the neutral (open) position there should be
no reading.
With the button pushed (closed) there should be a low
resistance •
•
•
•
Common
Normally Open
Common
Normally Open
ART_2565
Emergency Stop Button
Disconnect wires.
Connect one probe of ohm meter each terminal.
With the button PRESSED there should be no reading.
With the button RESET there should be a low resistance. •
•
•
•
1
1A
ART_2566
Relay
With the #85 terminal grounded, apply voltage to #86 terminal
connection.
Confirm normally closed (#87A) contacts are opening.
Continuity with #30 will be broken.
Confirm normally open (#87) contacts are closing. Continuity
with #30 will be made. •
•
•
ART_2330
RELAY DETAIL (relay energized)
85 86
87
87A
30
OPEN
CLOSED
B+
B−
NORMALL
Y
NORMALL
Y
COMMON
SIGNAL
SIGNAL