Panasonic KT4 User Manual

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Instruction manual

To prevent accidents arising from the misuse of this controller, please ensure the operator receives this manual.

SAFETY PRECAUTIONS

Be sure to read these precautions before using our products.
The safety precautions are classified into categories: “Warning” and “Caution”.

Warning : Procedures which may lead to dangerous conditions and cause death or serious injury, if not

carried out properly.

Caution : Procedures which may lead to dang erous conditions and cause superficial to medium injury

or physical damage or may degrade or damage the product, if not carried out properly.

• When using this controller on occasions which serious injury would be expected to occur or when damage is
likely to expand or proliferate, make sure to take safety measures such as installing double safety structures.

• Do not use this controller in an environment with flammable gases, or it may cause explosion.

• Fasten the electric wire with the t erminal screws securely. Imperfect connection m ay cause a bnormal
heating or fumes.

• Use this controller according to the rating and environmental conditions. Otherwise a bnormal heating or
fumes may occur.

• Do not touch the terminals while t he power is supplied to the controller, as this may cause electric shock.

• Do not disassemble or modify the controller, as this may cause electric shock or fumes.

Temperature Controller KT4

Warning

Caution

No.KT41E9 2006.08

Caution

• This instrument should be used in accordance with the specifications described in the manual.
If it is not used according to the specifications, it may malfunction or cause fire.

• Be sure to follow the warnings, cautions and notices. Not doing so could cause serious injury or accidents.

• The contents of this instruction manual are subject to change without notice.

• This instrument is designed to be installed in a control panel. If not, measures must be taken to ensure

that the operator cannot touch power terminals or other high voltage sections.

• Be sure to turn the power supplied to the instrument OFF before cleaning this instrument.

• Use a soft, dry cloth when cleaning the instrument.
(Alcohol based substances may cause tarnishing or defacement of the unit)

• As the display section is vulnerable, do not strike or scratch it with a hard object.

• Any unauthorized transfer or copying of this document, in part or in whole, is prohibited.

• Matsushita Electric Works, Ltd. is not liable for any damage or secondary damage(s) incurred as a result
of using this product, including any indirect damage.

• To pull out the inner assembly, release the hooks at the top and bottom of the instrument with thin, hard
tweezers. (If the hooks are released too far, they may break, or IP 66 function could deteriorate.)

Do not pull out the inner assembly except when repairing the instrument.)

1. Model number

1.1 Explanation of model number
A K T 4

(1) (2) (3) (4) (5) (6) (7)

(1) Supply voltage ---------------------- 1: 100 to 240V AC, 2: 24V AC/DC
(2) Input type ----------------------------- 1: Multi-input (Thermocouple, RTD, DC current and DC voltage
can be selected by key operation)
(3) Control output (OUT1) ------------ 1: Relay contact, 2: Non-contact voltage, 3: DC current
(4) Alarm output ------------------------- 1: A1 output, 2: A1 output + A2 output

1

(The alarm type and Energized /Deenergized can be selected
by key operation)
(When A2 output is applied, Heating/Cooling control cannot be
added)

1

(5) Heating/Cooling control (OUT2)-- 0: Not available, 4: Non-contact relay output

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(6) Heater burnout alarm -------------- 0: Not available, 1: Available (5A), 2: Available (10A), 3: Available
(20A), 4: Available (50A)
(Heater burnout alarm is not available for the DC current output)
(7) Serial communication ------------- 1: Available (The number is indicated only when the serial
communication is applied.)

1.2 How to read the rated label

The rated label is attached to the case.

When Heater burnout alarm is added, CT rated current is written in the bracket.

(1)

(2)

(1) Model number, supply voltage, input type, output type, etc. are entered.
(2) Lot number is entered.

A K T 4 1 1 1 1 0 0 1

No.

(e.g.)

Supply voltage: 100 to 240V AC

Multi-input
Relay contact output

A1 output

Heating/Cooling control is not added.
Heater burnout alarm is not added.
Serial communcation is applied.

2. Name and functions of the sections

(1) PV display: Indicates the PV (input value) with a red LED.

(1)

(2) SV display: Indicates the SV (main set value) with a green LED.
(3) SV1 indicator: The green LED lights when SV is indicated

on the SV display.

(2)

(4) OUT1 indicator: When OUT1 or heating output is ON, a

green LED lights. (For DC current output type, it flashes
corresponding to the MV (manipulated variable) in 0.25

(3)

second cycles.

(5) OUT2 indicator: When OUT2 is ON, a yellow LED lights.

(6) A1 indicator: When A1 output is ON, a red LED lights.
(7) EVT indicator: When Event output (A2 output, Heater

burn out alarm output) is ON, a red LED lights.

(8) AT indicator: While auto-tuning or auto-reset is being

performed, the yellow LED flashes.

(Fig. 2-1) (9) TX/RX indicator: The yellow LED flashes while serial

communication is performing.

control output OFF function works.
(To cancel the function, press the OUT/OFF key again for approx. 1 second.)

(10) (11) (12) (13)

(10) Increase key : Increases the numeric value.
(11) Decrease key : Decreases the numeric value.
(12) Mode key : Selects the setting mode or registers the set value.

(By pressing the Mode key, the set value can be registered)

(13) OUT/OFF key : The control output is turned on or off. If this key is pressed for approx. 1 second,

(4)

(5)

(6)
(7)

(8)

(9)

Notice

When setting the specifications and functions of this controller, connect terminals 1 and 2 for power
source first, then set them referring to “5. Setup” and “7. Operation flowchart” before performing
“3. Mounting to the control panel” and “4. Wiring”.

3. Mounting to the control panel

3.1 Site selection

This instrument is intended to be used under the following environmental conditions
(IEC61010-1): Overvoltage category

Ensure the mounting location corresponds to the following conditions:

• 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 0 to 50 (32 to 122 )

that does not change rapidly

• 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

, Pollution degree 2

2

3.2 External dimensions (Unit: mm)

A

yp

r

(*)

)

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Gasket A

Screw t

e mounting bracket

Terminal cove

(Fig. 3.2-1)

3.3 Panel cutout (Unit: mm)

75

(Fig. 3.3-1)

3.4 CT (Current transformer) external dime nsions (Unit: mm)

48

IP66 specification may be compromised, and all
warranties will be invalidated.

45

+0.5

48

11.5

0

+0.5

45

0

n x 48-3

95

101 (*)

Lateral close mounting

+0.5

0

n: Number of unit s mounted

Caution: If lateral close mounting is used for the controller ,

44.5

59.7

48 (*)

Terminal cover (AKT4801

0

+0.5

45

AKT4815 (for 5A, 10A, 20A) AKT4816 (for 50A)
(Fig. 3.4-1)

3.5 Mounting

Mount the controller vertically to fulfill the Dust-proof/Drip-proof specification (IP66).
Mountable panel thickness: 1 to 15mm
Insert the controller from the front side of the panel.
Attach the mounting brackets by the holes at the top and bottom of the case and secure the controller

in place with the screws.

(Fig.3.5-1)

not use excessive force while
screwing in the mounting
bracket, or the case or screw
type mounting bracket could be
damaged.
The torque is approximately

0.12N•m.

Warning

s the case is made of resin, do

4. Wiring
Warning

Turn the power supply to the instrument off before wiring or checking it.
Working or touching the terminal with the power switched on may result in severe
injury or death due to Electric Shock.

3

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• RELAY : Relay contact output

• OUT1 : Control output 1 (Heating output)

• OUT2 : Control output 2 (Cooling output)

• V/A : DC voltage output/DC current

output

• S : Non-contact relay output

• A1 : Alarm 1 output

• EVT : Event output (A2 output, Heater

burnout alarm output)

• CT : CT input

• TC : Thermocouple

• RTD : Resistance temperature detector

•

• DC : DC current, DC voltage

RS-485: Serial communication

(Fig. 4-1)

Notice

• The terminal block of the KT4 Series is designed to be wired from the left side.

The lead wire must be inserted from the left side of the terminal, and fastened by the
terminal screw.

• Dotted lines show options.

• Use a thermocouple and compensating lead wire according to the sensor input specification of

this controller.

• Use the 3-wire RTD which corresponds to the input specification of this controller.

• This controller does not have built-in power switch, circuit breaker or fuse. Therefore, it is

necessary to install them in the circuit near the external controller.
(Recommended fuse: Time-lag fuse, rated voltage 250V AC, rated current 2A)

• For a 24V AC/DC power source, do not confuse polarity when using direct current (DC).

• When using a relay contact output type, use a relay according to the capacity of the load to

protect the built-in relay contact.

• When wiring, keep input wires (thermocouple, RTD, etc.) away from AC sources or load wires

to avoid external interference.

• If A2 and Heater burnout alarm are applied together, they share common output terminals.

Lead wire solderless terminal

Use a solderless terminal with an insulation sleeve in which an M3 screw fits as shown below.

The torque is approximately 0.6N•m to 1.0N•m.

Solderless

terminal

Y type

Round type

Nichifu Terminal Industries CO.,LTD.

Japan Solderless Terminal MFG CO.,LTD.
Nichifu Terminal Industries CO.,LTD.

Japan Solderless Terminal MFG CO.,LTD.

Manufacturer Model

1.25Y-3

VD1.25-B3A

1.25-3

V1.25-3

(Fig. 4-2)

Tightening

torque

0.6N•m
Max. 1.0N•m

5.8mm or less

5.8mm or less

3.2mm

3.2mm

Option: Heater burnout alarm

(1) This alarm is not usable for detecting heater current

under phase control.

(2) This alarm is not usable for detecting 3-phase

heater current.

CT

(11)

CT input Terminal

(12)

Power
supply

(3) Use the current transformer (CT) provided, and pass one

lead wire of the heater circuit into the hole of the CT.

(4) When wiring, keep CT wire away from AC sources

or load wires to avoid the external interference.

(Fig. 4-3)

Heater

4

5. Setup

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Wire the power terminals only. After the power is turned on, the sensor input character and temperature
unit are indicated on the PV display and the input range high limit value is indicated on the SV display for
approximately 3 seconds. (Table 5-1)
(If any other value is set during the scaling high limit setting, the set value is indicated on the SV display.)
During this time, all outputs and the LED indicators are in OFF status.
Control will then start indicating the input value (PV) on the PV display and main set value (SV) on the SV display.
(While control output OFF function is working,
(Table 5-1)

Sensor input

K

J
R
S
B
E
T
N
PL­C (W/Re5-26)

Pt100

JPt100

4 to 20mA DC
0 to 20mA DC
0 to 1V DC
0 to 5V DC
0 to 10V DC
1 to 5V DC

5.1 Main setting mode
Character

(PV display)

5.2 Sub-setting mode

Character

(PV display)

PV display SV display PV display SV display

SV 0

• Sets SV.

• SV low limit to SV high limit, or Scaling low limit value to scaling high limit value

AT setting/Auto-reset setting

• Selects auto-tuning Perform or auto-reset Perform.

• If the auto-tuning is cancelled during the process, P, I and D values revert to the

previous value.

• When auto-tuning has not finished after 4 hours, it is cancelled automatically.

• Auto-reset is cancelled in approximately 4 minutes.
OUT1 proportional band setting 10

• Sets the proportional band for OUT1.

• The control action becomes ON/OFF action when set to 0 or 0.0.

• 0 to 1000

OUT2 proportional band setting 1.0 times

• Sets the proportional band for OUT2.

OUT2 becomes ON/OFF action when set to 0.0.

• Available only when Heating/Cooling control (option) is applied

• 0.0 to 10.0 times (multiplying factor to OUT1 proportional band)

Integral time setting 200 seconds

• Sets the integral time.

• Setting the value to 0 disables the function.

• Auto-reset can be performed when PD is the control action (I=0).

• 0 to 1000 seconds

Derivative time setting 50 seconds

• Sets the derivative time.

• Setting the value to 0 disables the function.

• 0 to 300 seconds

Scaling high
limit value

Name, Function, Setting range

Name, Function, Setting range

(2000 ), 0.0 to 999.9 ( ) or 0.0 to 100.0%

is indicated on the PV display.)

Scaling high
limit value

5

Default value

(SV display)

Default value

(SV display)

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ARW setting 50%

• Sets ARW (anti-reset windup).

• Available only when PID is the control action.

• 0 to 100%

OUT1 proportional cycle setting

• Sets proportional cycle for OUT1.

Relay contact output: 30 seconds
Non-contact voltage output: 3 seconds

• Not available for ON/OFF action or DC current output type.

With the relay contact type, if the proportional cycle time is decreased, the fre-

quency of the relay action increases and the life of the relay contact is shortened.

• 1 to 120 seconds

OUT2 proportional cycle setting 3 seconds

• Sets proportional cycle for OUT2.

• Not available if OUT2 is ON/OFF action

• Available only when Heating/Cooling control (option) is applied

• 1 to 120 seconds

A1 value setting 0

• Sets action point for A1 output. Setting the value to 0 or 0.0 disables the function (except

process high alarm and process low alarm).

• Not available if No alarm action is selected during A1 type selection

• Refer to (Table 5.2-1).

A2 value setting 0

• Sets action point for A2 output. Setting the value to 0 or 0.0 disables the function (except

process high alarm and process low alarm).

• Not available if No alarm action is selected during A2 type selection

• Refer to (Table 5.2-1).

.

and
measured
current
value are
indicated
alternately.

Heater burnout alarm value setting 0.0A

• Sets the heater current value for Heater burnout alarm.

• Available only when Heater burnout alarm (option) is added.

• When OUT1 is OFF, heater current value shows the same value as when OUT1 was on.

• Setting the value to 0.0 disables the function.

• It is recommended to set approx. 80% of the heater current value (set value)

considering the voltage fluctuation of power supply.

• Upon returning to set limits, the alarm will stop.

• Rating 5A : 0.0 to 5.0A Rating 10A: 0.0 to 10.0A

Rating 20A: 0.0 to 20.0A Rating 50A: 0.0 to 50.0A

(Table 5.2-1)

Alarm type Setting range

High limit alarm – (Input span) to input span ( ) *1
Low limit alarm – (Input span) to input span ( ) *1
High/Low limits alarm 0 to input span ( ) *1
High/Low limit range alarm 0 to input span ( ) *1
Process high alarm Input range low limit value to input range high limit value *2
Process low alarm Input range low limit value to input range high limit value *2
High limit alarm with standby – (Input span) to input span ( ) *1
Low limit alarm with standby – (Input span) to input span ( ) *1
High/Low limits alarm with standby 0 to input span ( ) *1

• When input has a decimal point, negative low limit value is –199.9, and positive high limit value is 999.9.

• All alarm types except process alarm are

deviation setting from the SV.
*1: For DC input, the input span is the same as the scaling span.
*2: For DC input, input range low (or high) limit value is the same as scaling low (or high) limit value.

5.3 Auxiliary function setting mode 1
Character

(PV display)

Name, Function, Setting range

Set value lock selection Unlock status

Default value

(SV display)

• Locks the set values to prevent setting errors.
The setting item to be locked depends on the selection.

• When Lock 1 or Lock 2 is selected, PID Auto-tuning or Auto-reset cannot be carried out.

•

(Unlock) : All set values can be changed.

(Lock 1): None of the set values can be changed.
(Lock 2): Only main setting mode can be changed.

(Lock 3): All set values except Input type can be changed. However, they return to
their previous value after power is turn ed off because they are not saved in t he non­volatile memory. Be sure to select Lock 3 when cha nging the set value freque ntly via
communication function. (If the value set by the communication function is the same as
the value before the setting, the value will not be written in the non-volatile memory .)

Do not change any setting item in Auxiliary function setting mode 2. If any item in
the mode is changed, it will affect other setting items such as the SV and Alarm
value.

6