7
D5C
D5C-1A
@
0 (AC Models)
•
Be aware that the D5C-1A
@
0 not in operation has a leakage
current of approximately 2 mA. Especially, if the load is a relay with
a current flow of 10 mA or less, a reset failure may result due to the
residual voltage. Therefore, connect a bleeder resistor as shown
below so that the residual voltage will be less than the reset voltage
of the load.
The bleeder resistance and permissible power are obtained from
the following formula.
R
≤
(K
Ω
) P>
(mW)
P: W number of bleeder load (Practically, the wattage must be a few
times larger than the obtainable value.)
I: Load current (mA)
•
If a DC relay or DC counter is used as a load connected through an
electronic timer or current rectification circuit, pay the utmost
attention so that the leakage current of the D5C AC model will not
cause the load to malfunction.
Sensitivity Adjustment
•
The sensitivity of the D5C can be adjusted by turning the adjuster
on the rear side with a flat-blade screwdriver.
•
The sensitivity increases by turning the adjuster clockwise (max. 30 pF)
and decreases by turning the adjuster counterclockwise (min. 100 pF).
•
Be sure to turn the adjuster with a torque of 0.08 N·m or less. If
excessive torque is applied, the adjuster will break.
Grounding
<For DC and AC Models>
•
In order to maintain the operational reliability of the D5C, be sure to
ground the blue or black wire of the power cable.
(Refer to
“Output Circuit Diagram”
on page 4.)
•
Operation may fail if the D5C is not grounded.
<DC Models>
•
The service power supply of the PC (Programmable Controller) is
not available to the D5C-1D
@
0. The negative line of the service
power supply of the PC is not grounded. Therefore, the D5C may
not operate.
Furthermore, if the negative line of the service power supply is
grounded, the noise resistance of the PC will drop.
<AC Models>
•
Provided that single-phase 200 V is supplied to the D5C-1A
@
0, if
one phase is grounded, the power supply will be short-circuited and
a machinery breakdown will result. Use an isolating transformer
and ground the secondary side of the transformer instead.
•
In the above case, be sure to ground the secondary side, otherwise
the D5C may not operate.
The lead wire colors of the D5C have been changed in compliance with the
latest applicable JIS standards. Colors in parentheses are previous ones.
Others
•
Do not disassemble the D5C, otherwise the internal wiring will be
damaged and the D5C will fail to operate.
•
The sealing of the D5C uses nitrile butadiene rubber (NBR), which
is highly oil resistive. If exposed to some types of oil or chemical
indoors or outdoors, however, the NBR may deteriorate. Contact
your OMRON representative for details.
•
When mounting the antenna to the D5C, be sure to tighten the
antenna to a torque of 0.39 to 0.83 N·m. If the antenna is not
tightened securely, the built-in contact may break.
•
If an appropriate antenna is mounted to a free attachment model,
hold the nut on the outer side with a wrench so that the nut will not
move. Then tighten the nut on the inner side within a torque range
of 0.78 and 1.18 N·m.
AC power
supply Vs
Bleeder resistor R
Load
Vs
10
−
I
Vs
2
R
SENSI
Set point
D5C
AC
Brown
(White)
Blue
(Black)
Load
Wrench
Direction
of turn
Antenna
