Omron K8AB-VW Manual page 5

Connections
■ Wiring Diagram
Overvoltage and Undervoltage
Operation Diagram
DIP switch settings: SW3 and SW4 both ON or both OFF.
Power supply voltage
Overvoltage setting (AL1)
Input
Undervoltage set value (AL2)
AL1 alarm indicator
Flashing
AL2 alarm indicator
Overvoltage (AL1) relay
Undervoltage (AL2) relay
T
T1: Power ON lock (1 s or 5 s)
T1
Note: 1. The K8AB-VW output relay 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 (Overvoltage Pre-
alarm Mode)
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
Overvoltage (AL1) relay
Overvoltage (AL2) relay
T1: Power ON lock (1 s or 5 s)
T1
Note: 1. The K8AB-VW output relay 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.
Cat. No. N144-E1-02
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Flashing
Lit
T T: Operating time (0.1 to 30 s)
Lit
T: Operating time (0.1 to 30 s)
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Lit
Lit
Undervoltage and Undervoltage
Operation Diagram (Undervoltage Pre-
alarm Mode)
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
Undervoltage (AL1) relay
Undervoltage (AL2) relay
T1: Power ON lock (1 s or 5 s)
T1
Note: 1. The K8AB-VW output relay 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.
Single-phase power
Power supply
Voltage input
Signal output
Signal output
Load
Note: The 24-VDC power supply type is a non-insulated power
supply.
The inputs and power supply are connected internally, so a
malfunction may occur due to an unwanted current path if the
inputs and power supply are connected to the same line.
Single-phase Voltage Relay
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Lit
Lit
A1
voltage
A2
V1
V2 COM
V3
14
11
AL1 relay
12
signal
output
24
21
AL2 relay
22
signal
output
K8AB-VW
5