1
Digital Heater Element Burnout Detector
K8AC-H
A high-precision Heater Element
Burnout Detector compatible with a
wide-range of heater control methods.
• Push-in terminals reduce the workload.
*
1
• Scaling
*
1
• NPN or PNP equivalent output.
*
1
• Lineup includes models compatible with many heater control methods,
including ON/OFF control, phase control, and cyclic control.
• High-precision heater burnout alarm with digital measurement.
• Contributes to preventative maintenance.
• If the gate function is disabled, the gate input can be used as an
undercurrent/overcurrent relay or for motor or lamp loads.
• Undercurrent detection values can be set separately for CT1 and
CT2.
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2
• CE marking and cUL certified (K8AC-H2
@@@
).
*1.
K8AC-H2
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Series only.
*2.
The overvoltage detection value is the same for the CT1 and CT2. Also, there
is one undercurrent output.
Note: 1.
Consult with your OMRON representative before using the K8AC with
phase control or cyclic control under the following conditions.
•
Using multiple heaters with different heater capacities
•
Using heaters with varying heater resistance (e.g., halogen heaters)
2.
The K8AC-H is designed to monitor for element burnouts on heaters
controlled with power regulators that used a three-alarm method.
Normal monitoring is not possible for circuits that use a power regulator with a six-alarm method.
Features
High-precision Heater Burnout Alarms with
High-resolution Digital Measurement
Burnout Alarm Possible for One of Multiple
Heater Elements
Heater burnout is detected by digitally processing minor current
fluctuations.
Push-in Terminals for Reduced Wiring Work
(K8AC-H2
@@@
Series Only)
Push-in terminals have no screws to come loose, which eliminates
the need to control screw tightening torque and retighten screws and
helps to reduce your workload.
Easily connect terminals using ferrules with insulation sleeves.
Easy Scaling Using the External CT Ratio
and Number of CT Passes
(K8AC-H2
@@@
Series Only)
Easily set the scaling just by inputting (1) the CT ratio and (2) the
number of CT passes.
Wide Current Input Range: 0.200 to 200.0 A AC.
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
K8AC-H
@
Digital Heater
Element Burnout
Detector
E5
@@
Digital
Temperature
Controller
Three-phase
delta-connected heater
G3PE
Three-phase
SSR
Current Transformer
RST
Electric
oven
K8AC-CT
@
Current Transformer
(2) Number of CT passes
(1) CT ratio
Heater
External
CT
@
A/1A
