KT4R Temperature Controller (Discontinued Products)

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Discontinued Products
Number System
Rating/ Performance
Dimensions
Wiring/ Connection
Cautions For Use

Ⅾiscontinued

Last time buy (JST)

September 29, 2023

We are sorry, the products have been discontinued. Please refer to the details of the discontinued products and the recommended substitutes list below.

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Discontinued Products

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Rating/ Performance

Performance outline

Item					Specifications
CE marking directive compliance					Low Voltage Directive, EMC Directive, RoHS Directive
Size					48×48mm 1.890 × 1.890 in
Rating	Rating power supply (Must be specified)				100 - 240V AC
	Rating power supply (Must be specified)				24V AC / DC
	Rating frequency				50 / 60Hz
	Rating power consumption				8 VA approx.
	Rating scale	Input type			Input range
		Thermocouple		K	-200 to 1,370℃ (-328 to 2,489℉)
				K	-200.0 to 400.0℃ (-328.0 to 752.0℉)
				J	-200 to 1,000℃ (-328 to 1,832℉)
				R	0 to 1,760℃ (0 to 3,200℉)
				S	0 to 1,760℃ (0 to 3,200℉)
				B	0 to 1,820℃ (32 to 3,308℉)
				E	-200 to 800℃ (-328 to 1,472℉)
				T	-200.0 to 400.0℃ (-328.0 to 752.0℉)
				N	-200 to 1,300℃ (-328 to 2,372℉)
				PL-II	0 to 1,390℃ (32 to 2,534℉)
				C (W / Re5−26)	0 to 2,315℃ (32 to 4,199℉)
		RTD		Pt100	-200 to 850℃ (-328 to 1,562℉)
				Pt100	-200.0 to 850.0℃ (-328.0 to 1,562.0℉)
				JPt100	-200 to 500℃ (-328 to 932℉)
				JPt100	-200 to 500.0℃ (-328.0 to 932.0℉)
		DC	Current	4 to 20 mA DC	-2,000 to 10,000
			Current	0 to 20 mA DC
			Voltage	0 to 1 V DC
				0 to 10 V DC
				1 to 5 V DC
				0 to 5 V DC
					・Scaling and change to the decimal point position is possible for DC current input and DC voltage input.
Sensor input	Thermocouple				K, J, R, S, B, E, T, N, PL-II, C (W / Re5-26) External resistor: Max. 100 Ω (Max. 40 Ω external resistor for B input)
	RTD				Pt100, JPt100 3-conductor system (Allowable input conductor resistance for each conductor: 10 Ω or 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)
	DC current			4 to 20 mA DC
	DC voltage			0 to 1 V DC	Input impedance: 1 MΩ or more, Allowable input voltage: 5 V or less, Allowable signal source resistance: 2 kΩ or less
				0 to 5 V DC	· 0 to 5 V DC, 1 to 5 V DC, 0 to 10 V DC Input impedance: 100 kΩ or more, 1 to 5 V DC Allowable input voltage: 15 V or less, Allowable signal source resistance: 100 Ω or less
				1 to 5 V DC
				0 to 10 V DC
Control output	Relay contact			(Must be specified)	1a
	Relay contact				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 voltage (voltage output for SSR drive)				12⁺²₀ V DC, Max. load current: 40 mA (with short circuit protection circuit)
	DC current				4 to 20 mA DC, Load resistance: Max. 550 Ω
Alarm output 1 (EV1)					Relay contact 1a 3 A 250 V AC (Resistive load) 1a 1 A 250 V AC (cosø=0.4) Electrical life: 100,000 times
Alarm output 2 (EV2)					Same as Alarm output 1
Control method					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					1 pattern, 9-step setting is possible (However, make function selection setting of either control with fixed set point or program control.)
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					125ms
Hysteresis (ON / OFF)					Thermocouple and RTD: 0.1 to 1,000.0 ℃ (℉) DC current and DC voltage: 1 to 10,000 (The decimal point place follows the selection)
Proportional band					Input without decimal point: 0 to Input span Input with decimal point: 0.0 to Input span DC current and DC voltage: 0.0 to 1,000.0 %
Integral time					0 to 3,600 seconds
Derivative time					0 to 1,800 seconds
Proportional cycle					1 to 120 seconds
Allowable voltage fluctuation					When 100 to 240 V AC: 85 to 264 V AC, When 24 V AC / DC: 20 to 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.), single amplitude: 0.35 mm 0.014 in (10 min. on 3 axes)
Breakdown vibration					10 to 55 Hz (1 cycle/min.), single 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					X, Y and Z each direction for 5 times 294 m/s²
Ambient temperature					−10 to 55 ℃ 14 to 131 ℉
Ambient humidity					35 to 85 % RH (No condensation)
Mass					110 g approx.
Waterproof					IP66 (applicable only to the front panel subject to rubber gasket employed)
Display character height					PV: 12.4 mm 0.488 in SV: 8.8 mm 0.346 in
Option functions	Heating / Cooling control		Relay contact		Using EV2 assigned setting, use for heating and cooling control is possible.
	Heating / Cooling control		Non-contact voltage		-
	Heater burnout alarm output				-
	Communication function				Please refer below to "COMMUNICATION PERFORMANCE OUTLINE".
Accessories	Installation frame / Mounting bracket				Included with controller
	Terminal cover				Sold separately
	Rubber gasket				Included with controller

COMMUNICATION PERFORMANCE OUTLINE

Item	Specifications
Communication method	Half-duplex
Communication speed	Select 9600, 19200 or 38400 bps using key operation.
Synchronous method	Asynchronous
Protocol	Modbus (RTU, ASCII), MEWTOCOL (Slave)
Coding	Binary / ASCII
Error correcting	Command resending
Error detection	Parity check and check sum
Data structure	Start bit: 1 Data bit: 7, 8 (For Modbus RTU: 8 only) Parity: Even / Odd / None Stop bit: 1 or 2
Interface	EIA RS-485 compliant
Number of nodes	31
Maximum communication distance	1,000 m 3,280.840 ft (cable resistance must be within 50 Ω)

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Wiring/ Connection

EXTERNAL CONNECTION DIAGRAM

PWR ： Power supply voltage 100-240 V AC or 24 V AC / DC (Ensure correct polarity when using DC in AC / DC 24 V.)

EV1 ： Alarm output 1

EV2 ： Alarm output 2 (optional) O1 ： Control output 1

TC ： Thermocouple input

RTD ： Resistance temperature detector input

DC ： DC voltage input or DC current input

RS-485 ： Serial communication RS-485

COMMUNICATION FUNCTION CONNECTION DIAGRAM (PLC Connection Diagram)

Note: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.

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Cautions For Use

Mounting

Please install to a rigid, irregularity-free flat surface in order to satisfy the IP66 specification for dust and splash proofing.
Panel thickness for installation: 1 to 5 mm 0.039 to 0.197 in.

(1)Insert the unit from the front of the control panel.

(2)Insert the installation frame until that the edges make contact with the panel and tighten the screw.
Fix by rotating screws one full turn after contact of screw tip and panel.
Apply tightening torque of 0.15 N•m.

Part description

Note: Color selection is the same for each size.

(1)PV display ： Indicates the process value (PV). (2)SV display ： Indicates the setting value (SV) (3)Increase key ： Increases the numeric value (4)Decrease key ： Decreases the numeric value (5)Mode key ： Selects the setting mode or registers the setting value. (6)OUT / OFF key ： The control output ON / OFF, auto / manual control function or program control can be switched. (7)Action indicators O1 ： Lights up when control output 1 is ON.
Lights up when heating control output (option) is ON.
For DC power output type, it flashes corresponding to the manipulated variable in a 125 ms cycle O2 ： Lights up when cooling control output (option) is ON. EV1 ： Lights when Alarm 1 output is ON. EV2 ： Lights when Alarm 2 output (option) is ON. AT ： Flashes during auto-tuning or auto-reset T/R ： Lights during serial communication (option) TX output.

Notes on site selection

This controller is intended to be used in the following environment (IEC 61010-1)

Mount the controller in a place with:

Overvoltage category II and Pollution degree 2

A minimum of dust, and an absence of corrosive gases
No flammable, explosive gases
Few mechanical vibrations or shocks
No exposure to direct sunlight, an ambient temperature of -10 to 55 ℃ 14 to 131 ℉ that does not change rapidly. (When installing inside a panel, make particular allowance for heat dissipation. Avoid installation in situations such as above equipment that generates heat.)
Locations in which temperature rapidly changes may cause condensation.
Locations or atmospheres in which benzine, thinners, alcohol, or other organic solvents are present, or in which ammonia, sodium hydroxide, or other strong alkaline substances may adhere.
Locations susceptible to direct impact or the transmission of vibrations, or where splashing with water is possible.
In the proximity of equipment in which large switching surges occur or near high-voltage cables, high-voltage equipment, power lines, power equipment, ham radio transmitters, or equipment containing these or similar devices.
An ambient non-condensing humidity of 35 to 85 % RH
No large capacity electromagnetic switches or cables through which large current is flowing
No water, oil or chemicals or where the vapors of these substances can come into direct contact with the controller

Notes on wiring

Wire-pressed terminal	Company name	Type name	Fastening torque
Fork type	NICHIFU Co., Ltd.	1.25Y-3	0.6 N•m Max. 1.0 N•m.
Fork type	J.S.T. Mfg. Co., Ltd.	VD1.25-B3A
Round type	NICHIFU Co., Ltd.	1.25-3
Round type	J.S.T. Mfg. Co., Ltd.	V1.25-3

The terminal block of KT4R / KT8R / KT9R / KT4H / KT4B series are designed to be wired from the left side (The terminal of KT2 series are designed to be wired from the upper and lower direction). The lead wire must be inserted from the left side of the terminal, and fastened by the terminal screw. Use a wirepressed terminal with insulation sleeve that fits to the M3 screw.

Terminal screw fastening torque is 0.6 N·m to 1.0 N·m (for KT4R / KT8R / KT9R / KT4H / KT4B series). For KT7 series by M3 screw is less than 0.5 N·m and by M2 screw is less than 0.25 N·m respectively.
Use a thermocouple and compensating lead wire according to the sensor input specification of the controller.
Use a 3-wire system of RTD according to the sensor input specification of the controller.
This controller has no built-in power switch, circuit breaker and fuse. Therefore, it is necessary to install them in the circuit near the external controller. (Recommended fuse: Time-lag fuse, rating voltage 250 V AC, rating current 2 A)
In the case of 24 V AC / DC power supply, do not confuse the polarity when it is DC.
With the relay contact output type, use the relay externally according to the capacity of the load to protect the built-in relay contact.
When wiring, keep input wire (Thermocouple, RTD, etc.) away from power source wire and load wire.
Turn the power supply to the instrument off before wiring or checking. Working or touching the terminal with the power switched on may result in electric shock which could cause severe injury or death.
Do not drop wire chips into the holes of vent when wiring.
To prevent the controller from harmful effects of unexpected high level noise, it is recommended that a surge absorber be installed between the electromagnetic switch coils.

Notes on mounting

Do not use excessive force while screwing in the mounting frame and mounting bracket of KT4R / KT8R / KT9R / KT4H / KT4B series.
For KT8R / KT9R series, recommended torque is approximately 0.1 N·m.
For KT4H / KT4B series, recommended torque is approximately 0.05 to 0.06 N·m.
For KT4R series, recommended torque is approximately 0.15 N·m.
When mounting the KT7 series to the DIN rail, mount it in a lateral direction. Make sure a click is audible when fixed into place.

KT4R Temperature Controller (Discontinued Products)

Discontinued Products

Number System