K8AC-H
3
Model Number Structure
Model Number Legend
Ordering Information
Digital Heater Element Burnout Detectors
Models with Screw-less Clamp Terminals (Power Input: Screw Terminals.)
Note: Consult with an OMRON representative if multiple heaters with different capacities are to be connected in parallel or if the heater resistance
will vary.
Models with Screw Terminals
Note: Consult with an OMRON representative if multiple heaters with different capacities are to be connected in parallel or if the heater resistance
will vary.
Optional Products (Sold Separately)
Current Transformers
Note: When selecting a Current Transformer, make sure that the rated current of the heater does not exceed the rated upper limit or the rated
current of the Current Transformer.
Power
supply
voltage
Heater control
method
Input
specifica-
tions
Output specifi-
cations
Com-
munica-
tions
output
Current input range
0.200 to 2.200 A
2.00 to 22.00 A
20.0 to 200.0 A
100 to
240 VAC
ON/OFF control
SSR control
Two
current
inputs
(for either
single-
phase or
three-
phase)
One relay output
RS-485
K8AC-H21CC-FLK
K8AC-H22CC-FLK
K8AC-H23CC-FLK
Two transistor
outputs
K8AC-H21CN-FLK
K8AC-H22CN-FLK
K8AC-H23CN-FLK
Phase control
Cyclic control
One relay output
K8AC-H21PC-FLK
K8AC-H22PC-FLK
K8AC-H23PC-FLK
Two transistor
outputs
K8AC-H21PN-FLK
K8AC-H22PN-FLK
K8AC-H23PN-FLK
Applicable Current Transformer
K8AC-CT20S or K8AC-CT20L
K8AC-CT200 or
K8AC-CT200L
Current
Transformers
(sold separately)
Power
supply
voltage
Heater control
method
Input
specifica-
tions
Output specifi-
cations
Com-
munica-
tions
output
Current input range
0.200 to 2.200 A
2.00 to 22.00 A
20.0 to 200.0 A
100 to
240 VAC
ON/OFF control
SSR control
Two
current
inputs
(for either
single-
phase or
three-
phase)
One relay output
RS-485
K8AC-H11CC-FLK
K8AC-H12CC-FLK
K8AC-H13CC-FLK
Two transistor
outputs
K8AC-H11CT-FLK
K8AC-H12CT-FLK
K8AC-H13CT-FLK
Phase control
Cyclic control
One relay output
K8AC-H11PC-FLK
K8AC-H12PC-FLK
K8AC-H13PC-FLK
Two transistor
outputs
K8AC-H11PT-FLK
K8AC-H12PT-FLK
K8AC-H13PT-FLK
Applicable Current Transformer
K8AC-CT20S or K8AC-CT20L
K8AC-CT200 or
K8AC-CT200L
Current
Transformers
(sold separately)
Through-hole diameter
Rated current
Installation method
Model
5.8-mm dia.
0.200 to 22.00 A
Surface-mounted with screws
K8AC-CT20S
12-mm dia.
Rear-surface mounted with screws
Binding band
K8AC-CT20L
20.0 to 200.0 A
Rear-surface mounted with screws
Binding band
K8AC-CT200
30-mm dia.
20.0 to 200.0 A
Surface-mounted with screws
K8AC-CT200L
1
2 3 4 5
6
7
K8AC-H
@@@@
-FLK 100-240VAC
1. Basic Model
K8AC-H: Digital Heater Element Burnout Detector
2. Product Type
1: Screw terminals
2: Screw-less clamp terminals (power input: screw terminals)
3. Current Input Range
1: 0.200 to 2.200 A
2: 2.00 to 22.00 A
3: 20.0 to 200.0 A
4. Heater Control Type
C: ON/OFF control (SSR or contactor)
P: Phase control or cyclic control
5. Output Type
C: Contact output (one SPDT relay contact output)
T: Transistor output (two NPN open collector outputs)
*
1
N: Transistor outputs (Two outputs: either NPN open-collector
output or PNP equivalent output can be used.)
*
2
*1.
K8AC-H1
@@
T only.
*2.
K8AC-H2
@@
N only.
6. Communications Specifications
FLK: RS-485
7. Power Supply Voltage
100-240VAC: 100 to 240 VAC
Production To Be Discontinued at the End of March 2009
