KC2S(AKC2)/KE2S(AKE2)
RESET INPUT
(Common to Eco-COUNT METER and Eco-HOUR METER)
NOTES
KE2S Eco-HOUR METER
1. The power-on time is measured when the
dedicated CT detects a through current.
2. When the elapsed time (number of hours
measured) reaches the full scale, the
display reverts to 0, and starts timing again
from 0.
3. When the reset input is set to on, the
display will read “0”. This does not time
during reset input.
4. Use the reset key on the front of the unit
to reset manually. The display will be blank
while the reset key is being pressed.
Reset input
Fall scale
Powered on time
Power on detection of
dedicated CT
ON
OFF
OFF
ON
ON
0
1. Contact input
2. Transistor input
(NPN transistor)
1
2
3
4
Reset
input
Dedicated CT
input
(Terminal
2
and
4
are connected inside.)
1
2
3
4
Reset
input
Dedicated CT
input
0V
5
6
(Terminal
2
and
4
are connected inside.)
Notes: 1. When using contact input, since current flow is small from reset input terminal
3
, please use relays and switches with high contact reliabillity.
2. When using transistor input, use the following as a guide for which transistors (Tr) to use for inputting.
(Collector withstand voltage
9
50V, leakage current < 1
μ
A)
1. Main unit
1) Reset input
(1) Never apply voltage to reset input. This can
cause damage to the internal elements.
(2) Since the current flow is very small from
reset input terminal
3
, please use relays and
switches with high contact reliabillity.
When inputting a reset by a transistor’s open
collector use a transistor for small signals in
which I
CBO
is 1
μ
A or less and always input with
no voltage.
(3) When wiring, try to keep all the input lines
to the reset inputs as short as possible and
avoid running them together with high voltage
and power transmission lines or in a power
conduit.
Note that power cable floating capacitance in
excess of 500 pF (10m on 2 mm
2
parallel
cables) could cause malfunctions. Take
particular care of inter-cable capacitance
when using shielded cables.
2) How to reset multiple panel installation type
units all at once.
Notes: 1. Use the following as a guide for choosing
transistors used for input (Tr).
Leakage current < 1
μΑ
2. Use as small a diode (D) as possible in the forward
voltage so that the voltage between terminals 3 and
4 during reset input meets the standard value
(0.5V).
(At IF = 20
μ
A, forward voltage 0.1 V or less.)
2. Dedicated CT
1) Measured power is AC (50 Hz/60 Hz).
Will not function when used with DC power.
2) When clamping to the power cable to be
measured, clamp only one of the live wires.
3) Avoid usage that bends the lead wire.
4) When clamping, make sure that no dust or
other foreign matter intercedes between the
clamp and contact. Foreign matter could
impact detection sensitivity.
3. Insulation sheet
Before using, please pull and remove the
insulation sheet in the direction of the arrow.
In consideration that the product might be
stored for long periods without being used, an
insulation sheet is inserted before shipping.
Remove the insulation sheet and press the
front reset key.
• Installation frame type
• One-touch installation type
4. Waterproof construction
The operation part is constructed to prevent
water from entering the unit and a rubber
gasket is provided to prevent water from
entering the gap between the unit and the
panel cutout.
There must be sufficient pressure applied to
the rubber gasket to prevent water from
entering.
Be sure to use the mounting screws when
using the mounting frame (ATH3803).
Attaching the one-touch installation type to a
panel will not waterproof the panel surface.
5. Do not use in the following environments
1) In places where the temperature changes
drastically.
2) In places where humidity is high and there
is the possibillity of dew. (When dew forms the
display may vanish and other display errors
may occur.)
3
or
D
Tr
4
3 4
3 4
D
D
Insulation sheet
Reset key
Insulation sheet
Reset key
Mounting frame
(ATH3803) (attached)
!LL2IGHTS2ESERVEDÚ#
OPYRIGHT
0ANASONIC%LECTRIC7ORKS#O,TD
26/03/2013
