H3DE H3DE
33
Precautions
Note: The undermentioned is common for all H3DE models.
Changing of Setting
NOTICE:
Do not change the time unit, time scale, operating mode,
or
output
type selector switch while the T
imer is in opera
-
tion
or malfunction could result.
Mounting and Dismounting
The
H3DE should be mounted as horizontally as possible.
When
mounting the H3DE on a socket mounting track, hook portion
(A)
of the T
imer to an edge of the track first, and then depress the
T
imer in the direction of (B).
(A)
(B)
When dismounting the H3DE, pull out portion (C) with a flat-blade
screwdriver and remove the T
imer from the mounting track.
(C)
30 mm min.
Rail stopper
The
H3DE can be mounted and dismounted with ease if a distance
of 30 mm or more is kept between the
H3DE
and the top surface of
other
equipment located below the H3DE.
Power Supplies
The
H3DE Series is provided
with a transformerless power supply
system. An electric shock may be received if the input terminal or
the
output type selector switch is touched
while power is being sup
-
plied.
Use
the bar terminal for wiring the H3DE. Using a stranded-wire ter
-
minal
may cause a short-circuit due to a stray wire entering into the
Timer.
Both AC and DC power supplies can be connected to the power
in
-
put
terminals without regarding polarity
.
With
the H3DE only, a DC power supply must be connected to
the
power
input terminals as
designated according to the polarity of the
terminals.
A DC power supply can be connected if its ripple factor is 20% or
less and the mean voltage is within the rated operating voltage
range
of the T
imer.
Connect
the power supply voltage through a relay or switch in such
a way that the voltage reaches a fixed value at once or the Timer
may
not be reset or a timer error could result.
For
the power supply of an input device, use an isolating
transform
-
er, of which the primary and secondary windings are mutually iso-
lated and the secondary winding is not grounded.
H3DE Power supply
Circuit
Isolation transformer is required.
Rectifier circuit
Start
input
B1
A1
A2
The H3DE-H has a large inrush current; provide sufficient power
supply
capacity
. If the power
supply capacity is too small, there may
be
delays in turning ON the output.
Installation
If
the load current is continuously being supplied to the
T
imer for a
long period of time, be sure to provide the mounting clearance as
shown in the figure below. If used under the conditions other than
those
specified below
, the life of internal components may be short
-
ened
due to an excessive rise in the internal temperature.
tt
DIN track
t: Mounting clearance (mm)
H3DE H3DE H3DE
