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Five spring contacts are provided on a standard mechanism assembly. An additional contact can be
furnished if required. Three contacts are required for gate operation (position 7, 8 & 11) and two contacts
(position 9 & 10) are factory adjusted and may be used as indicated in the table below.
Contacts are factory set as shown below. The rear or moveable contact rarely requires adjustment
unless being replaced. The contact opening can increase with use and should be checked periodically
and adjusted if required. The openings should not exceed 1/16". Contact adjustment can be made by
adjusting the bend angle of the front or fixed contact with a contact forming tool. Set contact opening
to where there is a light drag on a 1/16" gage. Always check contact operation after adjustment to be
sure there is square contact and a good wiping action when the contact closes. Tension pressure of
closed contact to be between 28 and 48 oz.
Contact tools and gages are available, see page 15 for ordering information.
CAUTION: Repeated or overbending of a contact may cause damage and not allow
proper tension when closed or gap when open
Contact cams are factory set for contact function as shown in the table below, or as specified by
customer. Adjustment may be required at installation. Use the allen wrench provided to loosen the cam
locking screw, then using the allen wrench as a lever, shift the cam positon and retighten the screw.
Term. Board
Position Number
7
8
9
10
11
C
C
IRCUIT
ONTROLLER
Wire
Contact Closed at
Designation
Gate Arm at:
L-M
1 degrees - 90 degrees
J-K
0 degrees - 89 degrees
R-S
83 degrees - 90 degrees
H-I
5 degrees - 90 degrees
T-U
0 degrees - 5 degrees
A
DJUSTMENT
CHECK CONTACT
TENSION AS SHOWN
FIXED CONTACT BEND
HERE TO ADJUST
Power Down Control
Power Up Control
Spare (Suggest Flashing Light Control)
Spare (Bell Control)
Horizontal Snub Control
8
Function of Contact
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