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19.When cleaning the product, do not use thinners or solvents. Use
commercial alcohol.
20.Make sure the power and output indicators operate correctly.
Depending on the application environment, the indicators and
other plastic parts may wear prematurely and become difficult to
see. Check and replace these parts regularly.
21.The terminal blocks may heat up to 65°C. Use care when
handling them.
22.Do not use the product if it is accidentally dropped. The internal
components may be damaged.
23.Be sure you understand the contents of this catalog and handle
the product according to the instructions provided.
24.Do not install the product in any way that would place a load on it.
25.When discarding the product, properly dispose of it as industrial
waste.
26.When using the product, remember that the power supply
terminals carry a high voltage.
27.The product must be handled only by trained electrician.
28.Prior to operation, check the wiring before you supply power to
the product.
29.Do not install the product immediately next to heat sources.
Precautions for Correct Use
Observe the following operating
methods to prevent failure and
malfunction.
1. Use operating power, input power, and other power supplies and
converters with suitable capacities and rated outputs.
2. Allow only qualified personnel to manage or handle the product.
3. Use a precision screwdriver or similar tool to adjust the setting
knobs.
4. The distortion in the input waveform for the K8AK-AS, K8AK-AW,
K8AK-PH, K8AK-PA, K8AK-PM, or K8DS-PH must be 30% max.
If the input waveform is distorted beyond this level, it may cause
unnecessary operation.
Do not use the K8AK-VS or K8AK-VW in circuits with waveform
distortion. Error will be large due to waveform distortion.
5. Error will be large if the K8AK-AS, K8AK-AW, K8AK-VS, or K8AK-
VW is used for thyristor or inverter control.
The K8AK-PH, K8AK-PA, K8AK-PM, K8AK-PW, or K8DS-PH
cannot be used on the secondary side of an inverter. To use the
product on the load side of an inverter, install a noise filter on the
primary side of the inverter.
6. To reduce the error in the setting knob, always turn the setting
knob from the minimum setting toward the maximum setting.
7. Phase loss is detected for the K8AK-PA or K8AK-PM only when
the phase loss occurs between the input contacts and the power
supply. Phase loss is not detected on the load side.
8. Phase loss can be detected only from the input contacts to the
power supply side by the K8AK-PH, K8AK-PA, K8AK-PM, or
K8DS-PH. Phase loss cannot be detected from the input contacts
to the load side.
Mounting and Removing the K8AK
• Mounting to DIN Track
1. Catch the upper hook on the DIN Track.
2. Push the product onto the Track until the hooks lock into place.
A
10
B
• To remove the product, pull down on the bottom hook with a flat-
blade screwdriver and lift up on the product.
Mounting and Removing the K8DS
• The product may be mounted in any direction, but it must be
mounted securely and as level as possible.
• To mount the product to the DIN Track, hook it on the DIN Track at
(A) and then press in on the Unit in direction (B).
• To remove the product, insert a flat-blade screwdriver at (C) and
pull down the hook to release the Unit.
• Leave at least 30 mm of space between the product and other
devices to allow easy installation and removal.
Adjusting the Setting Knobs
• Use a screwdriver to adjust the setting knobs. The knobs have a
stopper that prevents them from turning beyond the full right or left
position. Do not force a knob beyond these points.
Setting knob
* (Not applicable to the K8AK-PH and K8DS-PH.)
Applicable DIN Tracks:
PFP-100N (100 cm)
PFP-50N (50 cm)
(A)
(B)
30 mm min.
(C)
Hook
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