Mec Speed Level Series Service & Parts Manual page 63

Secton 6 - Electrcal System
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.
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
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.
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.
Page 56 Speed Level Seres - Servce & Parts Manual
Normally Open
Common
Normally Open
ART_2564
ART_2565
ART_2566
RELAY DETAIL
(relay energized)
COMMON
30
B−
SIGNAL 87A
85
87
January 2019
Normally Open
Common
Normally Open
Normally Open
Common
Normally Open
Common
Normally Open
Common
Normally Open
1
1A
B+
SIGNAL
86
ART_2330