KT7 Temperature Controllers (Discontinued Products)
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Discontinued Products
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Number System
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Rating/ Performance
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Dimensions
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Wiring/ Connection
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Cautions For Use
Ⅾiscontinued
Last time buy (JST)
September 29, 2023
Discontinued Products
Number System

Notes:
1) CT1 or CT2 for current transformer is provided as an accessory when heater burnout alarm function is added.
2) When adding alarm output 1 and heater burnout alarm at the same time, it'll be common output.
Model No. search method
Example: When the additional function (heater burnout alarm: 10 A) is added on to the basic function
• Model No.: AKT7111102
Rating/ Performance
Rating And Specifications
| Display | Specifications | |||
|---|---|---|---|---|
| KT7 | ||||
| CE marking directive compliance | Low Voltage Directive, EMC Directive, RoHS Directive | |||
| Size | 22.5×75mm 0.886×2.953 in | |||
| Rating | Supply voltage (Must be specified) | 100 - 240V AC | ||
| 24V AC/DC | ||||
| Frequency | 50/60Hz | |||
| Power consumption | Approx. 6VA | |||
| Rated scale | Input type | Input range | ||
| Thermocouple | K | -200 to 1370℃(-320 to 2,500 ℉) | ||
| -199.9 to 400.0℃(-199.9 to 750.0 ℉) | ||||
| J | -200 to 1,000℃(-320 to 1,800 ℉) | |||
| R | 0 to 1,760℃(0 to 3,200 ℉) | |||
| S | 0 to 1,760℃(0 to 3,200 ℉) | |||
| B | 0 to 1,820℃(0 to 3,300 ℉) | |||
| E | -200 to 800℃(-320 to 1,500 ℉) | |||
| T | -199.9 to 400.0℃(-199.9 to 7,50.0 ℉) | |||
| N | -200 to 1,300℃(-320 to 2,300 ℉) | |||
| PL-II | 0 to 1,390℃(0 to 2,500 ℉) | |||
| C(W/Re5-26) | 0 to 2,315℃(0 to 4,200 ℉) | |||
| RTD | Pt100 | -200 to 850℃(-300 to 1,500 ℉) | ||
| -199.9 to 850.0℃(199.9 to 999.9 ℉) | ||||
| JPt100 | -200 to 500℃(-300 to 900 ℉) | |||
| -199.9 to 500.0℃(-199.9 to 900.0 ℉) | ||||
| DC Current | 4 to 20mA DC | -1,999 to 9,999, -199.9 to 999.9, -19.99 to 99.99, -1.999 to 9.999 | ||
| 0 to 20mA DC | ||||
| DC Voltage | 0 to 1V DC | |||
| 0 to 10V DC | ||||
| 1 to 5V DC | ||||
| 0 to 5V DC | ||||
| · Scaling and change to the decimal point position is possible for DC current input and DC voltage input. · DC current input is supported with an externally connected 50Ω shunt resistor (sold separately). | ||||
| Sensor input | Thermocouple | K, J, R, S, B, E, T, N, PL-II, C (W/Re5-26) External resistor: Max. 100Ω (max. 40Ω external resistor for B input) | ||
| RTD | Pt100, JPt100 3-conductor system (Allowable input conductor resistance for each conductor: max. 10Ωor less) | |||
| DC current | 0 to 20 mA DC | Input impedance: 50Ω (Connect 50Ω shunt resistor between input terminals.) Allowable input current: 50 mA or less (When 50Ω shunt resistor is used) | ||
| 4 to 20 mA DC | ||||
| DC voltage | 0 to 1 V DC | Input impedance: min. 1 MΩ, Allowable input voltage: max 5 V, Allowable signal source resistance: max. 2 kΩ | ||
| 0 to 5 V DC | Input impedance: min. 100 kΩ, Allowable input voltage: max 15 V, Allowable signal source resistance: max. 100Ω | |||
| 1 to 5 V DC | ||||
| 0 to 10 V DC | ||||
| Control output | Relay contact | (Must be specified) | 1a | |
| 3 A 250 V AC (at resistive load), 1 A 250 V AC (at inductive load cos ø = 0.4), Electrical life: 100,000 times | ||||
| Non-contact DC voltage | 12+20 V DC, Max. load current: 40mA (Short-circuit protected) | |||
| DC current | 4 to 20mADC Load resistance: Max. 550Ω | |||
| Alarm output 1 | Open collector, Control capacity: 24V DC 0.1A(Max.) | |||
| Alarm output 2 | Not available | |||
| Control mode | PID action (with auto-tuning function), PI action, PD action (with manual reset function), P action (with manual reset function), ON / OFF action | |||
| Target temperature setting | - | |||
| Program control function | - | |||
| Indication accuracy | Thermocouple | Within ± (0.2 % + 1 digit) of each input span or within ±2℃ (4℉) whichever is greater However, R or S input; within ±6℃ (12℉) in the range of 0 to 200℃ (32 to 392℉) B input, range of 0 to 300℃ (32 to 572℉): accuracy is not guaranteed K, J, E, T, and N input, less than 0℃ (32℉): within ± (0.4 % ±1 digit) of input span | ||
| RTD | Within ±(0.1 % + 1 digit) of each input span or ±1℃ (2℉) whichever is greater | |||
| DC current and DC voltage | Within ±0.2% ±1 digit of each input span | |||
| Sampling period | 250ms | |||
| Hysteresis (ON / OFF) | Thermocouple and RTD: 0.1 to 100.0℃ (℉) DC current and DC voltage: 1 to 1,000 (The decimal point place follows the selection) | |||
| Proportional band | For sensor input range and DC current, DC voltage 0.0 to 110.0% | |||
| Integral time | 0 to 1,000 seconds | |||
| Derivative time | 0 to 300 seconds | |||
| Proportional cycle | 1 to 120 seconds | |||
| Allowable voltage fluctuation | When 100-240 V AC: 85-264 V AC, When 24 V AC/DC: 20-28 V AC/DC | |||
| Insulated resistance | 500 V DC, Min. 10 MΩ | |||
| Breakdown voltage | Between input terminal and power terminal Between output terminal and power terminal 1.5 kV AC for 1 min. | |||
| Malfunction vibration | 10 to 55 Hz (1 cycle/min.), double amplitude: 0.35 mm 0.014 in (10 min. on 3 axes) | |||
| Breakdown vibration | 10 to 55 Hz (1 cycle/min.), double amplitude: 0.75 mm 0.030 in (1 hour on 3 axes) | |||
| Malfunction shock | X, Y and Z each direction for 5 times 98 m/s2 | |||
| Breakdown shock | Same as above, but 294 m/s2 | |||
| Ambient temperature | 0 to +50℃ 32 to +122 ℉ | |||
| Ambient humidity | 35 to 85%RH (No condensation) | |||
| Mass | 150 g approx. | |||
| Waterproof | None | |||
| Display character height | PV: 7.4 mm 0.291in SV: 7.4 mm 0.291in (PV / SV switching display) | |||
| Option functions | Heating / Cooling control | Relay contact | None | |
| Non-contact voltage | Open collector, Control capacity: 24V DC 0.1A(Max.) | |||
| Heater burnout alarm output | Open collector, Control capacity: 24V DC 0.1A(Max.) | |||
| Communication function | Please refer below to “Communication Function Overview”. | |||
| Accessories | Mounting frame / Mounting bracket | - | ||
| Terminal cover | - | |||
| Rubber gasket | - | |||
Communication Function Overview
| Item | Specification |
|---|---|
| Communication method | Half-duplex |
| Communication speed | Select 2,400, 4,800, 9,600, or 19,200 bps using key operation. |
| Synchronization type | Asynchronous |
| Protocol | Modbus |
| Coding | ASCII |
| Error correcting | Parity check and check sum |
| Error detection | Parity check, check sum |
| Data structure | Start bit: 1 Data bit: 7 Parity: Even parity Stop bit: 1 |
| Interface | EIA RS-485 compliant |
| No. of nodes | 31 |
| Maximum cable length | 1,000 m 3,280.840 ft(cable resistance must be within 50Ω |
Dimensions
- Unit: mm in

Note) The communications terminal is the modular jack on the bottom side of the controller.Tolerance: ±1±0.039
AKT4811
Shunt Resistor

CT1
Current transformer (CT) (for 5, 10, and 20A)

CT2
Current transformer (CT) (for 50 A)

Note:
Current transformer CT1 or CT2 is included (only with KT7 and KT4H)
when heater burnout alarm function is added.
Wiring/ Connection
External Connection Diagram

POWER SUPPLY : Power supply
OUT : Control output
RELAY : Relay contact output
V/A : DC voltage output / DC current output
EVT : Alarm output [Outputs when alarm, loop fault alarm or heater burnout alarm (optional) goes ON.]
TC : Thermocouple
RTD : Resistance temperature detector
DC : DC current or DC voltage
RS-485 : Serial communication
CT : CT input
Communication Function Connection Diagram (PLC Connection Diagram)

Notes: 1)Terminating resistors (Terminators)The KT series has a built-in pull-up resistor or pull-down resistor, which serves as the terminating resistor. For this reason, do not connect the terminating resistor on the communication line.2)Please use a RJ-11 6 polarized type modular connector.Please use a cable that is suitable for a modular connector.
Wiring/ Connection
External Connection Diagram

Communication Function Connection Diagram (PLC Connection Diagram)

Notes: 1)Terminating resistors (Terminators)The KT series has a built-in pull-up resistor or pull-down resistor, which serves as the terminating resistor. For this reason, do not connect the terminating resistor on the communication line.2)Please use a RJ-11 6 polarized type modular connector.Please use a cable that is suitable for a modular connector.