2
1
1
.
.
I
I
n
n
s
s
t
t
a
a
l
l
l
l
a
a
t
t
i
i
o
o
n
n
p
p
r
r
e
e
c
c
a
a
u
u
t
t
i
i
o
o
n
n
s
s
Caution
This unit is intended to be used under the following environmental conditions (IEC61010-1):
Overvoltage category
, Pollution degree 2
Ensure the mounting location corresponds to the following conditions:
A minimum of dust, and an absence of corrosive gases
No flammable, explosive gases
No mechanical vibrations or shocks
No exposure to direct sunlight, an ambient temperature of 0 to 50 (32 to 122 )
that does not change rapidly, no icing
An ambient non-condensing humidity of 35 to 85%RH
No large capacity electromagnetic switches or cables through which large current flows
No water, oil or chemicals or where the vapors of these substances can come into direct contact
with the unit
When this unit is installed inside a control panel, the ambient temperature of this unit must be kept
to under 50 . Otherwise the life of electronic components (especially electrolytic capacitors) will be
shortened.
Note: Avoid setting this unit directly on or near flammable material even though the case of this unit
is made of flame-resistant resin.
2
2
.
.
W
W
i
i
r
r
i
i
n
n
g
g
p
p
r
r
e
e
c
c
a
a
u
u
t
t
i
i
o
o
n
n
s
s
Caution
Do not leave bits of wire in the unit, because they could cause fire, malfunction or trouble.
Insert the connecting cable into the designated connector securely to prevent malfunction.
Connect the wire for the AC power source with its designated terminal as described in this instruction
manual.
The IF-400 will be damaged if the AC power source wire is connected to an incorrect terminal.
When wiring terminals of the IF-400 at the terminal block, use correct fitting ferrules with an insulation sleeve
for the terminal screw.
Tighten the terminal screw within the specified torque. If excessive force is applied to the screw when
tightening, the screw or case may be damaged.
For a 24V AC/DC power source, do not confuse polarity when using direct current (DC).
This unit does not have a built-in power switch, circuit breaker or fuse. Therefore, it is necessary to install
them in the circuit near the unit externally.
(Recommended fuse: Time-lag fuse, rated voltage 250V AC, rated current 2A)
3
3
.
.
R
R
u
u
n
n
n
n
i
i
n
n
g
g
a
a
n
n
d
d
m
m
a
a
i
i
n
n
t
t
e
e
n
n
a
a
n
n
c
c
e
e
p
p
r
r
e
e
c
c
a
a
u
u
t
t
i
i
o
o
n
n
s
s
Warning
Do not touch live terminals. This may cause electric shock or problems in operation.
Turn the power supply to the instrument OFF before retightening the terminal or cleaning.
Working or touching the terminal with the power switched ON may result in severe injury or death
due to Electric Shock.
Use a soft, dry cloth when cleaning the unit.
(Alcohol based substances may tarnish or deface the unit)
As the display section is vulnerable, do not strike or scratch it with a hard object.