K8AC-CT20S Omron, K8AC-CT20S Datasheet - Page 4

• 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

4
K8AC-H
Specifications
Ratings
*1. The gate input enables correct measurement by syncing to heater control.
*2. When using the K8AC-H for a 380 to 480-V AC power supply circuit, use a step-down transformer. Contact your OMRON representative for
*3. Order the Current Transformers separately.
Item
Power supply voltage
Operating voltage range
Power consumption
(at max. load)
Applicable circuits
Applicable control methods
Input signal and applicable Current
Transformer
Measurement method
Gate input
signal *1
Outputs
Communications
Indication method
Main functions
Ambient
temperature
Ambient
humidity
Altitude
Accessories
Case material
Case color
Mounting method
When using it with ON/OFF control, receive the relay contact output from the temperature controller or other controller with a 24-VDC auxiliary
relay and then use this signal as the gate input signal to the K8AC.
The gate function can also be disabled. If it is disabled, the gate input can be used as a normal undercurrent/overcurrent relay.
information on transformers.
ON/OFF control
SSR control
Cyclic and phase con-
trol
Relay contact outputs:
K8AC-H@@@C-FLK
Transistor outputs
(NPN open-collector):
K8AC-H1@@T-FLK
Transistor outputs:
K8AC-H2@@N-FLK
Operating
Storage
Operating
Storage
Heater control method
Model
100 to 240 VAC (50/60 Hz) *2
85% to 110% min. of the rated power supply voltage (85 to 264 V)
10 VA max.
Single-phase or three-phase (with same model)
ON/OFF control (e.g., temperature controller with relay output)
SSR control (e.g., temperature controller with voltage output)
Cyclic control and phase control (e.g., temperature controller with current output)
Current measurement via two special Current Transformers (Burnout alarm set value can be set separately for each Current
Transformer.)
Refer to Current Measurement Ranges by Model on page 6 for information on the current measurement range and
applicable Current Transformer.
Instantaneous measurement using root-mean-square values
Voltage = 12/24 VDC (continuous input possible to 30 VDC)
Input impedance = 4 kΩ min.
ON voltage: 9.6 VDC max., OFF voltage: 1 VDC min.
Minimum voltage pulse ON time for burnout detection:
200 ms min.
Input impedance = 4 kΩ min.
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One SPDT relay contact output
Same output used for heater burnout, SSR short circuit, SSR open circuit, and heater layer short circuit alarms.
0.3 A at 125 VAC (resistive load), 1 A at 30 VDC (resistive load)
Maximum switching capacity: 37.5 VA, 30 W
Mechanical durability: 50 million operations min., electrical durability: 100,000 operations min.
Two transistor outputs (NPN open-collector)
One ALM output: Outputs heater burnout alarm or heater layer short circuit alarm.
One SSR error output: Outputs SSR short circuit alarm or SSR open circuit alarm.
12 to 24 VDC, 50 mA max.
OFF leakage current: 100 µA max., ON residual voltage: 1.5 V max.
Two transistor outputs: Can be used either NPN open-collector outputs or PNP equivalent outputs.
One ALM output: Outputs heater burnout alarm or heater layer short circuit alarm.
One SSR error output: Outputs SSR short circuit or SSR open circuit detection.
12 to 24 VDC, 50 mA
OFF leakage current: 100 µA max., ON residual voltage: 1.5 V max.
RS-485 1200, 2400, 4800, 9600, 19200 bps (CompoWay/F)
7-segment digital display: No. of display digits: 4 (red)
LED status indicators: RUN (green), ADJ (orange), SET (orange), GATE (orange), SSR (orange) and ALM (orange)
Heater burnout alarm, heater layer short circuit alarm, SSR short circuit detection, SSR open circuit detection, voltage
fluctuation compensation, output ON-delay timer, energy-saving mode, key protection, and power supply voltage
measurement
−10 to 55°C (with no icing or condensation)
−25 to 65°C (with no icing or condensation)
25% to 85% (with no condensation)
25% to 85% (with no condensation)
2,000 m max.
Instruction sheet
PC (Polycarbonate)
N1.5 (clear black)
Mounting to a DIN Track
Models for ON/OFF control (e.g., SSRs or contactors)
K8AC-H@@C@-FLK
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4 to 20 mA DC (Burnout detection is possible for an input of
7 mA or greater.)
Input impedance = 50 Ω max.
Models for phase control and cyclic control
K8AC-H@@P@-FLK