Timing Charts - Omron K8DT-AW Series Manual

Timing Charts

Overcurrent and Undercurrent Operation Diagram
DIP switch settings: SW3 ON and SW4 ON, or
SW3 OFF and SW4 OFF
Power
supply voltage
Overcurrent
set value (AL1)
Delay time: 250 ms
(reference value)
Input
Undercurrent
set value (AL2)
AL1 alarm indicator
Flashing
AL2 alarm indicator Lit
Contacts 11-14 or
transistor output
t: Operating time (0.1 to 30 s)
t
LOCK: Startup lock time (0 to 30 s)
LOCK
Note 1. The K8DT-AW@ outputs are normally operative.
Note 2. The startup lock prevents unnecessary alarms from being generated during the unstable period
when the power is first turned ON. This function is valid only for overcurrent operation.
Overcurrent and Overcurrent Operation Diagram
DIP switch settings: SW3 ON and SW4 OFF.
Power
supply voltage
Overcurrent
set value (AL1)
Overcurrent
set value (AL2)
Delay time: 250 ms
Input
(reference value)
Flashing
AL1 alarm indicator
Flashing
AL2 alarm indicator
t
Contacts 11-14 or
transistor output
t: Operating time (0.1 to 30 s)
t
LOCK: Startup lock time (0 to 30 s)
LOCK
Note 1. The K8DT-AW@ outputs are normally operative.
Note 2. The startup lock prevents unnecessary alarms from being generated during the
unstable period when the power is first turned ON. This function is valid
only for overcurrent 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
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)
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Delay time: 250 ms
(reference value)
Lit
Lit
Current knob (AL1)
Current knob (AL2)
Operating time knob (T)
Startup lock time knob
(LOCK)
Ferrules
8 mm 8 mm
Undercurrent and Undercurrent Operation Diagram
DIP switch settings: SW3 OFF and SW4 ON.
Power
supply voltage
Input
Undercurrent
set value (AL1)
Undercurrent
set value (AL2)
Flashing
AL1 alarm indicator
Flashing
AL2 alarm indicator
Contacts 11-14 or
t
transistor output
t
LOCK: Startup lock time (0 to 30 s)
LOCK
Note 1. The K8DT-AW@ outputs are normally operative.
Note 2. The startup lock prevents unnecessary alarms from being generated during the unstable period
when the power is first turned ON. This function is valid only for overcurrent 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 overcurrent or undercurrent.
Alarm indicator The indicator flashes to indicate the error status
(ALM1, ALM2: Red) after the input has exceeded the set value while
the operating time is being clocked.
Setting Knobs
Item
Used to set the current to 10% to 100% of
Current knob (AL1)
maximum setting range.
Used to set the current to 10% to 100% of
Current knob (AL2)
maximum setting range.
Operating time knob (T) Used to set the operating time to 0.1 to 30 s.
Startup lock time knob
Used to set the startup lock time to 0 to 30 s.
(LOCK)
K8DT-AW
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
5