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10
INSTALLATIONS
Installations
1. Surface mount
1) Put the terminal socket on the board
directly or put it on the DIN rail (Fig. 1).
2) Insert the timer into the terminal
socket and fix it with clip (Fig. 2)
3) On DIN rail mounting, mount the timer
on the DIN rail tightly to get the proper
dimension. (Fig. 3)
4) 8-pin type should be connected with
terminal socket (AT8-DF8K).
5) DIN rail (AT8-DLA1) is also available
(1 m).
2. Flush mount
1) The mounting frame (AT8-DA4) and
rubber gasket (ATC18002 for surface
waterproofing) that are available at extra
costs are necessary. If the pin
connection socket is the 8-pin type, use
the 8P cap (AD8-RC).
2) How to mount the timer
From the panel front, pass the timer
through the square hole. Fit the
mounting frame from the rear, and then
push it in so that the clearance between
the mounting frame and the panel
surface is minimized. In addition, lock the
mounting frame with a screw.
3) Caution in mounting the timer
• If the PM4H and the LT4H series are
used as the waterproof types, tighten the
reinforcing screws on the mounting
frames so that the timers, the rubber
gaskets, and the panel surfaces are
tightly contacted with each other.
(Tighten the two screws with uniform
force and make sure that there is no
rattling. If the screws are tightened too
excessively, the mounting frame may
come off.)
• If the timer is installed with the panel
cover and the rubber gasket removed,
the waterproofing characteristic is lost.
4) Installation
Loosen the screws on the mounting
frame, spread the edge of frame and
remove it.
5) Correctly connect the pins while
seeing the pin connection diagram.
6) The rear terminal block (ATC78041)
or the 8P cap (AD8-RC) is necessary to
connect the pins, and avoid directly
soldering the round pins on the timer.
7) Panel cutout dimensions
The standard panel
cutout dimensions are
shown in the left
figure. (Panel
thickness: 1 to 5 mm
.039 to .197 inch
)
8) Although the
timers can be
mounted adjacent
to each other in
this case, it is
recommended to
arrange the
mounting holes
as shown in the
right figure to
facilitate attaching
and detaching the
mounting frame.
9) Adjacent
mounting
Although the timers can be mounted
adjacent to each other, remember that
the panel surface of timer will lose its
water-resistant effect. (Panel thickness:
1 to 5 mm
.039 to .197 inch
)
Guideline values for dimension A when
installing n units in sequence are as
follows:
A = (48
×
n – 2.5)
(mm)
When lining up the
timers horizontally,
set the frames in
such a position so
the formed spring
areas are at the top
and bottom.
When lining up the
timers vertically, set
the frames in such
a position as the
formed spring
areas are at the
right and left.
+0.6
+
0
Pull the mounting
frame backward
while spreading out
its hooks with your
thumbs and index
fingers.
45
+
0.6
0
1.772
+
.024
0
45
+
0.6
0
1.772
+
.024
0
45
+
0.6
0
1.772
+
.024
0
45
+
0.6
0
1.772
+
.024
0
80 mm
3.150 inch
or more
80 mm
3.150 inch
or more
A
45
+
0.6
0
1.772
+
.024
0
Formed
spring
Formed
spring
(Fig. 2)
(Fig. 1)
Terminal socket
(Fig. 3)
DIN rail
1
2
1
Push in
Screw
Panel
LT4HL 02.1.9 6:25 PM Page 10