Fuji Electric FJ Series - Auxiliary Contact Unit Mounting and Dismounting

 Notes for assembly of auxiliary contact units
(1) Auxiliary contact units cannot be mounted on the front
and side of the same main element.
(2) Only one type of units or one front mounting unit can be
mounted on each AC contactor.
(3) In the case that an interlock unit is mounted, the auxiliary
contact unit (side mounting) can be mounted on only one
side.
 Notes for maintenance and spot inspection
(1) Auxiliary contact unit, Please store the product after it is
packaged in a plastic bag, in case dust gets into it.
(2) You should not merely replace the contacts of the
auxiliary contact unit. You need to replace all the
contacts of the unit.
 Mounting and dismounting methods
z Front mounting (SZ1FA, SZ1KA)
During mounting, tilt and press the assembly device in the
direction  into the main unit, and hang the hook 1 of the
assembly device on the mounting slot of the main unit.
Slide it in direction  and confirm whether the hook 2 is
mounted on the main unit.
During dismounting, hold the hook 2 of the assembly
device with your fingers and slide it in direction  until it is
unlocked, and then dismount it.
z Front mounting (SZ-A-C)
· Mounting steps
(1) Press the unit in direction  into the main
element. Move the unit in direction 
until the hook of the unit snaps into the
mounting slot of the main element. (When
the hook snaps into the slot, a “click” will
be heard.)
(2) After the mounting is completed, push
the movable part of the auxiliary contact
unit from the front to confirm whether the
movement is smooth or not.
· Dismounting steps
(1) Lift the hook of the unit with your fingers
and move the unit in direction .
z Side mounting (SZ-AS1-C)
· Mounting steps
(1) Press the contact support
part of the main element in
direction  while inserting
the movable protrusion of
the unit into the dented
portion of the movable part
of the main element. Press
the unit in direction  until
the hook of the unit snaps
into the mounting slot of the
main element.
(2) After the mounting is
completed, push the
movable part of the auxiliary
element or main contact
unit from the front to confirm
whether the movement is
smooth or not.
· Dismounting steps
Dismount after the upper and
lower frames are dismounted.
Auxiliary contact units
Hook2
Hook2
Hook1
Assembly devices
Main unit
Mounting slot
SZ1FA

SZ1KA

2
3
Hook2
1
Hook2
Hook1
Assembly devices
The mounting
slot of the
main element
Hook
(Unmountable)
If yes, insert the
movable protrusion
of the auxiliary
contact unit into this
dented part.
Hook
Mounting
slot
The movable
dented part of
the main element
The support part
of the contact
The movable
protrusion of
the unit
Information subject to change without notice
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Contactors and Thermal Overload Relays