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K8DT-VW
Timing Charts
Overvoltage and Undervoltage Operation Diagram
DIP switch settings: SW3 and SW4 both ON or both OFF.
Power supply voltage
Overvoltage set value
(AL1)
Delay time: 250 ms
(reference value)
Input
Undervoltage set value
(AL2)
AL1 alarm indicator
Flashing
AL2 alarm indicator
Contacts 11-14 or
transistor output
t
t1: Power ON lock (1 s or 5 s)
t1
Note: 1. The K8DT-VW@ output is normally operative.
2. The power ON lock prevents unnecessary alarms from being
generated during the instable period when the power is first
turned on. There is no relay output during timer operation.
Overvoltage and Overvoltage Operation Diagram
DIP switch settings: SW3 ON and SW4 OFF.
Power supply voltage
Overvoltage setting
(AL1)
Overvoltage setting
(AL2)
Input
Flashing
AL1 alarm indicator
Flashing
AL2 alarm indicator
Contacts 11-14 or
transistor output
t
t1
t1: Power ON lock (1 s or 5 s)
Note: 1. The K8DT-VW@ output is normally operative.
2. The power ON lock prevents unnecessary alarms from being
generated during the instable period when the power is first
turned on. There is no relay output during timer operation.
Nomenclature
Front
Terminal block
(See note.)
Power indicator
Output status indicator
Alarm indicator
Terminal block
(See note.)
Note: Use solid wires, stranded wires, or ferrules to connect to the
terminals.
To maintain the withstand voltage after connecting the terminals,
insert 8 mm of exposed conductor into the terminal.
Solid Wire
Stranded Wires
8 mm
4
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Delay time: 250 ms
Flashing
(reference value)
Lit
t
t: Operating time (0.1 to 30 s)
Lit
t: Operating time (0.1 to 30 s)
Hysteresis: Fixed at 5%
Delay time: 250 ms
Hysteresis: Fixed at 5%
(reference value)
Delay time: 250 ms
(reference value)
Lit
Lit
t
t: Operating time (0.1 to 30 s)
Voltage knob (AL1)
Voltage knob (AL2)
Operating time knob (T)
Ferrules
8 mm
8 mm
Undervoltage and Undervoltage Operation Diagram
DIP switch settings: SW3 OFF and SW4 ON.
Power supply voltage
Input
Undervoltage set value
(AL1)
Undervoltage set value
(AL2)
Flashing
AL1 alarm indicator
Flashing
AL2 alarm indicator
Contacts 11-14 or
t
transistor output
t
t1
t1: Power ON lock (1 s or 5 s)
Note: 1. The K8DT-VW@ output is normally operative.
2. The power ON lock prevents unnecessary alarms from being
generated during the instable period when the power is first
turned on. There is no relay output during timer operation.
Indicators
Item
Power indicator
Lit when power is being supplied.
(PWR: Green)
Output status indicator
Lights for output (lit for normal operation)
(Output: Yellow)
Lit when there is an overvoltage or
undervoltage.
Alarm indicators
The indicator flashes to indicate the error
(AL1 and AL2: Red)
status after the input has exceeded the set
value while the operating time is being
clocked.
Setting Knobs
Item
Used to set the voltage to 10% to 100% of
Voltage knob (AL1)
maximum setting range.
Used to set the voltage to 10% to 100% of
Voltage knob (AL2)
maximum setting range.
Operating time knob (T)
Used to set the operating time to 0.1 to 30 s.
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Delay time: 250 ms
(reference value)
Delay time: 250 ms
(reference value)
Lit
Lit
t: Operating time (0.1 to 30 s)
Meaning
Usage
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