Datasheet
K8DT-PM
3
Connections
Terminal Diagram
Note: Do not connect anything to terminals that are shaded in gray.
Wiring Example
Relay Output Transistor Output
Note: Use copper wires with a rating of 75°C or an equivalent rating.
Timing Charts
Overvoltage/Undervoltage and Phase Sequence/Phase Loss Operation Diagram
Note: 1. The K8DT-PM@ output contacts are normally operative.
2.
The power ON lock prevents unnecessary alarms from being
generated during the unstable period when the power is first
turned ON. There is no contact output during timer operation.
3. Phase loss is detected by a drop in the L1, L2, or L3 voltage.
A phase loss is detected when any of the phase-to-phase
voltages goes below 60% of the rated input.
4. L1 and L2 are also used for the power supply. If the voltage
becomes very low, the Relay will not operate.
5. Phase loss (on power supply side and load side) is not
detected in the motor load during operation.
Operation Table
*1. L1 and L2 are also used for the power supply. If the voltage
becomes very low, the indicator will turn OFF.
*2. The indicator will flash once per second after an incorrect phase
is detected and once per 0.5 second during the detection time.
K8DT-PM1 C N
L1
14
L2
11
12
L3
DIP SW
Inside
Inside
(2) Output
C: Relay Output T: Transistor Output
14 11
12
14 11
(1) Input Voltages
(1) (2)
3-phase,
3 W
power
supply
Phase-to-phase voltage:
200 to 240 VAC
PM1 PM2
L1
L3
L2
3-phase,
3 W
power
supply
Phase-to-phase voltage:
380 to 480 VAC
L1
L3
L2
3-phase
voltage
Motor
Power
supply
AC/DC
L1
L2
L3
DIP SW
L1
14
L2
11
12
L3
PLC
Power
supply
AC/DC
3-phase
voltage
Motor
L1
L2
L3
DIP SW
L1
14
L2
11
L3
L1
L3
L2
L3
L2
L1
Flashing
Flashing
L1
L2
L3
Phase sequence Operation
Phase Loss Operation
t: Operating time (0.1 to 30 s)
t: Operating time (0.1 to 30 s)
t1: Power ON lock (1 s)
t
t1
t
OVER_LED
UNDR_LED
Undervoltage
set value
Power supply
voltage
Contacts 11-14 or
transistor output
L1
L2Input
L3
Hysteresis:
Fixed at 5%
Hysteresis: Fixed at 5%
Lit
Flashing
Lit
Flashing
OVER_LED
Flashing
Flashing
L1
Input L2
L3
UNDR_LED
Contacts 11-14 or
transistor output
L2
L1
L3
Flashing
Delay time: 250 ms
(reference value)
Delay time: 250 ms
(reference value)
Item
Indicators
Contact
operation
OUT_LED OVER_LED UNDR_LED
Normal
ON OFF OFF ON
Overvoltage
OFF ON OFF OFF
Undervoltage
OFF OFF ON OFF
Phase Loss OFF Flashing *1 Flashing *1OFF
Phase sequence
OFF OFF Flashing *2OFF