Terminal Diagram; Wiring Example; Timing Charts - Omron K8DT-PZ Series Manual

Connections

Terminal Diagram

K8DT-PZ1 C N
(1) (2)
(1) Input Voltages
PZ1 PZ2
Phase-to-phase voltage:
200 to 240 VAC
3-phase, 3-phase,
3 W 3 W
power power
supply supply
L1 L2
L3
Note: Do not connect anything to terminals that are shaded in gray.

Wiring Example

Relay Output
L1
3-phase
L2
voltage
L3
L1 L2
L3
DIP SW
12
14 11

Timing Charts

Overvoltage, Undervoltage, Phase Sequence, and Phase Loss Operation Diagram
Overvoltage set value
L1
Input L2
L3
Undervoltage set value
Flashing
Alarm indicator
Delay time: 250 ms
(reference value)
Contacts 11-14 or
transistor output
t
t1: Power ON lock (1 s)
t1
Phase Loss Operation
L1
Input L2
L3
Lit Lit Lit
Alarm indicator
Contacts 11-14 or
transistor output
Note: 1. The K8DT-PZ@ 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.
L1
Phase-to-phase voltage:
380 to 480 VAC
L1 L2
DIP SW
L3
14
Motor
Power
supply
AC/DC
Hysteresis: Fixed at 2%
Hysteresis: Fixed at 2%
Flashing
Lit Lit
t
t: Operating time (0.1 to 30 s)
Delay time: 250 ms
(reference value)
t: Operating time (0.1 to 30 s)
t: Operating time (0.1 to 30 s)
Phase sequence Operation
L2 L1 L3 L1
L1 L3 L2 L2
L3 L2 L1 L3
Flashing Flashing Flashing
L2
L3
(2) Output
C: Relay Output T: Transistor Output
12 12
14 11
11
Inside
Transistor Output
L1
3-phase
L2
voltage
L3
Note: Use copper wires with a rating of 75°C or an equivalent rating.
Hysteresis: Fixed at 2%
Asymmetry set value
Flashing
Lit
Delay time: 250 ms
(reference value)
Operation Table
t
Item
Normal
Overvoltage
Undervoltage
Asymmetry
Phase loss
Phase
sequence
*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-PZ
14 11
Inside
L1 L2
L3
DIP SW
14 11
PLC
Indicators
OUT_LED ALM_LED
ON OFF
OFF ON
OFF ON
OFF ON
OFF ON *1
OFF Flashing *2
Moter
Power
supply
AC/DC
Output
operation
ON
OFF
OFF
OFF
OFF
OFF
3