K8AC-CT20S Omron, K8AC-CT20S Datasheet - Page 2

• Manufacturer Part Number: K8AC-CT20S
• Description: CURRENT TRANSFORMER .2-22A
• Manufacturer: Omron
• Series: K8ACr

Specifications of K8AC-CT20S

• Accessory Type: Current Transformer
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: K8ACCT20S

2
K8AC-H
Compatible with Various Heater Control
Methods
Models with heater burnout alarms for ON/OFF control, phase
control, and cyclic control have been added to the lineup.
Check the current input range, connected CT, and relay output type
before selecting the model from the product specifications.
Note: Both single-phase and three-phase heaters are supported.
Overcurrent and SSR Failure Detection from
Heater Layer Short Circuits.
Compatible with Heater Burnout Alarms for
Phase Control Heaters
(K8AC-H@@P@)
The burnout detection value is shifted according to the
control output value from the temperature controller.
Compatible with Gradient Settings of Power Controllers
When using gradient settings with a power controller, set a gate
current level that is suitable for the gradient settings.
Note: Set the heater burnout alarm value based on the current at the
• Overcurrent can be detected from layer short circuits in addition to
• SSR short circuit failures and SSR open circuit failures are
• Detecting SSR failures enables promptly discovering that
• Analog control is performed on the output power according to the
• Heater burnout alarms are stable with the K8AC-H because the
providing heater burnout alarms with overcurrent detection
settings.
detected by monitoring the heater current and the control outputs
from the temperature controller.
temperature control has failed.
temperature controller's current output (4 to 20 mA) when phase
control or cyclic control is used.
heater burnout alarm values are linked with the control output
value from the temperature controller.
Output current
Control output from temperature controller
heater's rated input.
4 mA
Heater current
100%
7 mA
0%
Heater burnout
alarm value
4 mA
Not detected
Measurement range
14 mA
Heater Burnout Alarm Value
The heater burnout alarm value shifts
according to the control input (4 to
20 mA) from the temperature controller.
20 mA
Detected
Operation gate current level
20 mA
Gradient setting: 100%
Gradient setting: 50%
Control signal
The transistor output from the K8AC-H2@@N
can be used as either an NPN open-collector
output or a PNP equivalent output.
The transistor output of the K8AC-H2@@N uses a photocoupler for
isolation with the internal circuits, and so either an NPN open-
collector output or a PNP equivalent output can be used.
Preventive Maintenance
The run time can be measured by the K8AC-H.
Managing the run time history until burnouts occur is useful for
diagnosis and preventative maintenance for equipment.
Count the Total Number of Alarms Output
Set the upper and lower limits to count the total number of alarms that
have been output.
NPN Output
Load power supply
Load
PNP Equivalent Output
Load
Load power supply