INSTRUCTION MANUAL

ACN-200

Digital Temperature Indicating Controller

No. ACN21E4 2019.04

PrefaceThank you for purchasing our Digital Temperature Indicating Controller ACN-200. This manual contains instructions
for the mounting, functions, operations and notes when operating the ACN-200. To ensure safe and correct use,thoroughly read and understand this manual before using this controller. To prevent accidents arising from themisuse of this controller, please ensure the operator receives this manual.
Abbreviations used in this manual
Abbreviation
Term
PV
Process variable
SV
Desired value
Characters used in this manual
Indication
Number, , Alphabet
0
1

2

3

4

5

6

7

8

9

A

J

K

P

T

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 a fire.
• Be sure to follow the warnings, cautions and notices. If they are not observed, serious injury or malfunction may occur.
• The contents of this instruction manual are subject to change without notice.
• Care has been taken to ensure that the contents of this instruction manual are correct, but if there are any doubts,
mistakes or questions, please inform our sales department.
• This instrument is designed to be installed through a control panel. Measures must be taken to ensure that the operator
cannot touch power terminals or other high voltage sections.
• Any unauthorized transfer or copying of this document, in part or in whole, is prohibited.
• Shinko Technos Co., Ltd. is not liable for any damage or secondary damage(s) incurred as a result of using thisproduct, including any indirect damage.

Safety Precautions (Be sure to read these precautions before using our products.)

The safety precautions are classified into 2 categories: “Warning” and “Caution”. Depending on the circumstances,
procedures indicated by
Caution may result in serious consequences, so be sure to follow the directions for usage.

Warning

Procedures which may lead to dangerous conditions and cause death or serious
injury, if not carried out properly.

CautionProcedures which may lead to dangerous conditions and cause superficial tomedium injury or physical damage or may degrade or damage the product, if not
carried out properly.

Warning• To prevent an electrical shock, fire or damage to the instrument, parts replacement may only be undertaken by
Shinko or other qualified service personnel.

Safety Precautions• To ensure safe and correct use, thoroughly read and understand this manual before using this instrument.
• This instrument is intended to be used for industrial machinery, machine tools and measuring equipment.
Verify correct usage after purpose-of-use consultation with our agency or main office. (Never use this
instrument for medical purposes with which human lives are involved.)• External protection devices such as protective equipment against excessive temperature rise, etc. must be
installed, as malfunction of this product could result in serious damage to the system or injury to personnel.
Proper periodic maintenance is also required.
• This instrument must be used under the conditions and environment described in this manual. Shinko TechnosCo., Ltd. does not accept liability for any injury, loss of life or damage occurring due to the instrument being
used under conditions not otherwise stated in this manual.

Caution with Respect to Export Trade Control Ordinance

To avoid this instrument from being used as a component in, or as being utilized in the manufacture of weaponsof mass destruction (i.e. military applications, military equipment, etc.), please investigate the end users and thefinal use of this instrument. In the case of resale, ensure that this instrument is not illegally exported.
11. Model
1.1 Model

ACN-2
Control Action□ □ - □ / □ , □ Series name: ACN-200
1
ON/OFF Control action(*1)
2
PD Control action
0
No Alarm Action
1
High Limit alarm
1
H High Limit with Standby alarm
2
Low Limit alarm
2
H Low Limit with Standby alarm
Alarm Output(*1), (*2)
4High/Low Limits alarm
4
H High/Low Limits with Standby alarm
6
High/Low Limit Range alarm
8
Process High alarm
9
Process Low alarm
R
Relay contact: 1c
Control Output
S
Non-contact voltage (for SSR drive): 12 V DC 15%
E
Thermocouple (K, J)
InputR
RTD (Pt100)(*1) Control Action and Alarm Type can be selected with the DIP switch.
When shipped, user specified Control Action and Alarm Type have been set on the controller.
(*2) For the Alarm Action with Standby, “H” is attached to the end of the model name.

1.2 How to Read the Model Label
The model label is attached to the left side of case and inner assembly.
• Label on the left side of case
• Label on the inner assembly
Model
Model
Input
Control output

Input
Serial number

Serial number(Fig. 1.2-1)(Fig. 1.2-2)

2. Name and Functions
Alarm Function Not Added

Alarm Function Added
PV Display

OFF Indicator

Setting Pointer

ON Indicator

Scale Plate

ON Indicator
OFF Indicator

Setting Dial

ALARM Indicator

ALARM Key
(Fig. 2-1)
PV Display:
Setting Dial:RESET Key:RESET Key

(Fig. 2-2)

Indicates PV with the red LED.
Sets SV (desired value) by turning the Setting Pointer to the SV on the Scale Plate.
Performs Auto-reset in PD Control action by pressing this key for 3 seconds.
In the Alarm Setting Mode, this key works as a DOWN Key.
ON Indicator:
The green LED lights when control output is ON.
OFF Indicator:
The red LED lights when control output is OFF.
ALARM Key:The unit enters the Alarm Setting Mode by pressing this key for 3 seconds.
In the Alarm Setting Mode, this key works as an UP Key.
ALARM Indicator: When alarm output is ON, the red indicator is lit.
2

3. Setup

Setup should be done before using this controller according to the user’s’ conditions, using the DIP switch(SW202):
Setting the Control Action and Alarm Type (when the Alarm Function is added)

Factory default value: User specified Control Action and Alarm TypeIf the user’s specification is the same as the default value of the ACN-200, or if setup has already been complete,
it is not necessary to set up the controller.
3.1 Taking the Internal Assembly Out
Unfasten the screw at the bottom of the front face by rotating it counterclockwise, using a Phillips-head screwdriver suitable for the screw size.
Take the internal assembly out from the case by holding the both sides of the front panel. (Fig. 3.1-1)
3.2 Switches Setting
Select a Control Action and Alarm Type with the DIP switch (SW202), using a small flat blade screwdriver or
tweezers. (Fig. 3.2-1) (Table 3.2-1)(Fig. 3.1-1)(Fig. 3.2-1)(Table 3.2-1) Control Action and Alarm Type Selection: DIP switch (SW202)

ON
OFF

Switch No.
123456

Control Action and Alarm Type
Control
Action

Alarm
Type
(*)

Switch No. and Status
1

2

3

4

5

6

PD Control

OFF

OFF

ON/OFF Control

ON

OFF

No Alarm Action

OFF

OFF

OFF

OFF

OFF

High Limit alarm

ON

OFF

OFF

OFF

OFF

High Limit with Standby alarm

ON

OFF

OFF

ON

OFF

Low Limit alarm

OFF

ON

OFF

OFF

OFF

Low Limit with Standby alarm

OFF

ON

OFF

ON

OFF

High/Low Limits alarm

ON

ON

OFF

OFF

OFF

High/Low Limits with Standby alarm

ON

ON

OFF

ON

OFF

High/Low Limit Range alarm

OFF

OFF

ON

OFF

OFF

Process High alarm

ON

OFF

ON

OFF

OFF

Process Low alarm

OFF

ON

ON

OFF

OFF

(*) For details of Alarm Action, refer to Section “7.2 Alarm Action” (pages 9, 10).
3.3 Insertion of the Inner Assembly
Insert the internal assembly into the case by matching the groove inside the case, while holding both sides ofthe front panel. Use a Phillips-head screw driver to fasten the screw at the bottom of the front face, and rotate
it clockwise. The tightening torque should be 0.3 N•m.
3

4. Mounting to the Control Panel
4.1 Site Selection

CautionUse within the following temperature and humidity ranges.
Temperature: 0 to 50 (32 to 122 ) (No icing), Humidity: 35 to 85 %RH (Non-condensing)If the ACN-200 is mounted through the face of a control panel, the ambient temperature of the unit – not theambient temperature of the control panel – must be kept under 50 . Otherwise the life of electronic parts(especially electrolytic capacitors) of the unit will be shortened.
This instrument is intended to be used under the following environmental conditions (IEC61010-1):
Overvoltage category , Pollution degree 2
Ensure the mounting location corresponds to the following conditions:• A minimum of dust, and an absence of corrosive gases• No flammable, explosive gases• No 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, chemicals or the vapors of these substances can come into direct contact with the unit
4.2 External Dimensions (Scale: mm)
Mounting bracket(Fig. 4.2-1)
4.3 Panel Cutout (Scale: mm)Horizontal close mounting
n: Number of mounted units

Lengthwise close mounting
n: Number of mounted units(Fig. 4.3-1)
4

4.4 Mounting and Removal

CautionAs the case is made of resin, do not use excessive force while screwing in the mounting
bracket, or the case could be damaged.
The tightening torque should be 0.12 N•m.
Mounting
Mount the controller vertically to a flat, rigid panel.
Mountable panel thickness: 1 to 8 mm(1) Insert the unit from the front of the panel. (Fig. 4.4-1)(2) Attach the mounting brackets to the slots at the top and bottom (or right and left) of the case,and secure the controller in place with the screws provided. (Fig. 4.4-2)
Mounting Brackets Location• Lengthwise close mounting: Right and left of the case
• Horizontal close mounting: Top and bottom of the case(Fig. 4.4-1)(Fig. 4.4-2)

Removal(1) Turn the power to the unit OFF, and disconnect all wires.
(2) Unfasten screws of the mounting brackets, and remove the brackets.
(3) Pull the unit out from the front of the panel.

55. Wiring
Warning

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

Caution• The terminal block of this instrument is designed to be wired from the bottom. The lead wire must be
inserted from the bottom of the terminal, and fastened by the terminal screw. The torque should be 0.63 N•m.
• Use a thermocouple and compensating lead wire according to the sensor input specifications of this controller.
• Use the 3-wire RTD according to the sensor input specifications of this controller.
• This instrument does not have a built-in power switch, circuit breaker and fuse.
It is necessary to install a power switch, circuit breaker and fuse near the controller.
(Recommended fuse: Time-lag fuse, rated voltage 250 V AC, rated current 2 A)
• When using a relay contact output type, externally use a relay according to the capacity of the load to protect
the built-in relay contact.
• When wiring, keep input wires (thermocouple, RTD) away from AC sources or load wires.
• Do not apply a commercial power source to the sensor which is connected to the input terminal nor allow thepower source to come into contact with the sensor.

Y-typeRing-type

Manufacturer

Model

Nichifu Terminal
TMEV1.25Y-3
Industries Co.,Ltd.
Japan Solderless
VD1.25-B3A
Terminal MFG Co.,Ltd.
Nichifu Terminal
TMEV1.25-3
Industries Co.,Ltd.
Japan Solderless
V1.25-3
Terminal MFG Co.,Ltd.

Torque0.63 N•m

3.2 mm

7.9 mm maximum

Solderlessterminal

7.9 mm maximum

5.1 Lead Wire Solderless Terminal
Use a solderless terminal with an insulation sleeve in which an M3 screw fits as shown below.
The tightening torque should be 0.63 N•m.

(Fig. 5.1-1)

5.2 Terminal Arrangement
Alarm Function Not Added:

TC: Thermocouple input
RTD: RTD input
OUTPUT: Control output(Fig. 5.2-1)
Alarm Function Added:
TC: Thermocouple input
RTD: RTD input
OUTPUT: Control output
ALARM: Alarm output(Fig. 5.2-2)
6

3.2 mm5.3 Wiring Example• Number of Shinko SSR units when connected in parallel
SA-400 series: 5 units
SA-500 series: 2 units• For relay contact output, to prevent the unit being damaged by the harmful effects of unexpected high level
noise, it is recommended that a surge absorber be installed between the electromagnetic switch coils.
ACN-220-S/E

Constant-temperature
Chamber
1

Thermocouple +2+

Heater

3

-

4

5

6

7

8

9

-

+

+

SSR

Single-phase 200V-

(Fig. 5.3-1)
ACN-224-S/E, H

Constant-temperature
Chamber
Thermocouple ＋

10

1
＋

－

Heater

11

12

13

14

15

16

17

18

2 3
－

4

5

6

7
＋

8

9

Alarm unit

－

＋

SSR

Single-phase 200 V－(Fig. 5.3-2)

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6. Operation

6.1 Starting Operation
After the setup, mounting to the control panel, and wiring are completed, operate the unit following theprocedure below.
(1) Switch the power supply to the ACN-200 ON.
[ K:
For approx. 3 seconds after the power is turned on, sensor input characters and temperature unit
, J:
, Pt100:] are indicated on the PV Display. During this time, all outputs and LED
indicators are in OFF status. After that, the PV Display indicates the PV.
(2) Set the SV.
Set the SV (desired value) by turning the Setting Dial so that the Setting Pointer matches the SV on the Scale
Plate.
(3) Set the Alarm value (When the Alarm Function is added)
Set the Alarm action point.
Keep pressing the ALARM Key for 3 seconds.
] and
The unit enters the Alarm Value Setting Mode, and the PV Display alternately indicates [Alarm Value.
Set the Alarm Value with the ALARM (UP) Key and RESET (DOWN) Key.
Setting range is shown below (Table 6.1-1). Alarm Action is activated even when the value is set to 0 (zero).
(Table 6.1-1)
Alarm Type
Setting Range
High Limit alarmHigh Limit with Standby alarm-199 to input span
Low Limit alarm
Low Limit with Standby alarm
High/Low Limits alarm
High/Low Limits with Standby alarm
High/Low Limit Range alarm
0 to input span
Process High alarm
Process Low alarm
If the unit does not operate for 5 seconds, the Alarm Value will be registered, and the unit will revert to
the PV Display Mode.
(4) Turn the Load Circuit Power ON.
Control Action starts so as to keep the control target at the SV.
6.2 Performing Auto-reset (Offset Correction)
Auto-reset can be performed in PD Control action.
It cannot be performed in ON/OFF Control action.
When PV is stabilized (PV indication is stable) within the Proportional Band, press the RESET Key for
3 seconds. Auto-reset will be performed, and offset will be automatically corrected.
During auto-reset, the 1st dot from the right on the PV Display flashes.
Since the corrected value is internally memorized, it is not necessary to perform the Auto-reset again
as long as the process is the same.
Auto-reset is finished in approximately 4 minutes. It cannot be released while performing this function.
Auto-reset is performed

Temperature
SV

Offset span

Offset is corrected
Time(Fig. 6.2-1)
8

7. Action Explanation
7.1 Control Output Action
ControlactionON/OFF control (ACN-210)
Hysteresis
ON

PD control (ACN-220)
Proportional band
ON

OFF

OFF
SV

SV
Relay
contact
output

H 9

H 9

H 9

C 8

C 8

C 8

L 7

L 7

L 7

- 8

- 8

+ 7

+ 7

Non-contact - 8
12 V DC
voltage+ 7
output

0V DC

H 9

H 9

C 8

C 8

L 7

L 7

- 8

- 8

+ 7

+ 7

Cycle action is performed
according to deviation

12V DC

12/0V DC

0V DC

Cycle action is performed
according to deviation

ON indicator(Green)

Lit

Unlit

Lit

Unlit

OFF indicator
(Red)

Unlit

Lit

Unlit

Lit

: Turns ON or OFF.

7.2 Alarm Action
High Limit Alarm

High Limit with Standby Alarm

Alarm hysteresis

ON

ON
OFF

Alarm hysteresis-Alarm value SV[Setting example]
SV: 200?
Alarm value: 5?
Alarm hysteresis : 1? (Fixed)[Alarm action]
205? ? PV: Alarm output is turned ON.
PV ? 204? : Alarm output is turned OFF.

+Alarm value[Setting example]
SV: 200?
Alarm value: 5?
Alarm hysteresis : 1? (Fixed)[Alarm action]
205? ? PV: Alarm output is turned ON.
PV ? 204? : Alarm output is turned OFF.

5?

-5?
1?

ON

OFF

ON

OFF
204?

200?

205?

Low Limit with Standby Alarm

SV +Alarm value[Setting example]
SV: 200?
Alarm value: -5?
Alarm hysteresis : 1? (Fixed)[Alarm action]
PV ? 195? : Alarm output is turned ON.
196? ? PV: Alarm output is turned OFF.

1?

ON

204?

205?

High/Low Limits AlarmOFF
195? 196?

SV +Alarm value[Setting example]
SV: 200?
Alarm value: -5?
Alarm hysteresis : 1? (Fixed)[Alarm action]
PV ? 195? : Alarm output is turned ON.
196? ? PV: Alarm output is turned OFF.
-5?

OFF
Alarm value

SV

Alarm value[Setting example]
SV: 200?
Alarm value: 5?
Alarm hysteresis : 1? (Fixed)[Alarm action]
205? ? PV or PV ? 195? : Alarm output
is turned ON .
196? ? PV ? 204? : Alarm output isturned OFF .

1?

5?

OFF
Alarm value

SV

Alarm value[Setting example]
SV: 200?
Alarm value: 5?
Alarm hysteresis : 1? (Fixed)[Alarm action]
205? ? PV or PV ? 195? : Alarm output
is turned ON .
196? ? PV ? 204? : Alarm output
is turned OFF .
5?

5?

1?

ON

Alarm hysteresis
ON

ON

ON

200?

High/Low Limits with Standby Alarm

Alarm hysteresis

Alarm hysteresis

OFF-Alarm value

OFF-Alarm value

5?
1?

200?

Alarm hysteresis
ON

OFF-Alarm value SV

Low Limit Alarm

1?

1?

5?
1?

ON

ON
OFF
195? 196?

200?

OFF

OFF
195? 196? 200? 204? 205?

195? 196? 200? 204? 205?

: Alarm output is in Standby. If SV is changed, the Standby function will be activated again.
When PV enters the range of alarm output OFF, the Standby function is released.
For High Limit alarm and High/Low Limits alarm, the alarm output is activated when the indication is overscale (p.11),
and the Standby function is released for the alarm with Standby function.
For Low Limit alarm and High/Low Limits alarm, the alarm output is activated when the indication is underscale (p.11),
and the Standby function is released for the alarm with Standby function.

9

High/Low Limit Range Alarm

Process High Alarm

Alarm hysteresis
ON

Hysteresis
ON

OFF
Alarm value SV Alarm value[Setting example]
SV: 200?
Alarm value: 5?
Alarm hysteresis : 1? (Fixed)[Alarm action]
195? ? PV ? 205? : Alarm output isturned ON.
206? ? PV or PV ? 194? : Alarm output
is turned OFF .
5?

5?
1?

1?

ON

Process Low Alarm
Alarm hysteresis
ON

OFF
Alarm value[Setting example]
Alarm value: 205?
Alarm hysteresis : 1? (Fixed)[Alarm action]
205? ? PV: Alarm output is turned ON.
PV ? 204? : Alarm output is turned OFF.

OFF
Alarm value[Setting example]
Alarm 1 value: 195?
Alarm 1 hysteresis: 1? (Fixed)[Alarm action]
PV ? 195? : Alarm output is turned ON.
196? ? PV: Alarm output is turned OFF.

1?
ON
OFF

1?
ON

204? 205?

OFF
195? 196?

OFF
194? 195?

200?

205? 206?

8. Specifications
RatingRated scale

Input

General
Structure

Supply voltage
Allowable voltage
fluctuation range
Dimensions
Mounting
Case
PV Display
Indicator

Input
Scale range
K
0 to 400 [5 ]*EJ
0 to 400 [5 ]** One division of the total scale

Resolution
1
1

Input
Scale range
Resolution
R
Pt100
0 to 100 [1 ]*1* One division of the total scale
Thermocouple : K, J, External resistance: 100
maximum
RTD: Pt100, 3-wire type
Allowable input lead wire resistance: 10
maximum per wire
100 to 240 V AC 50/60 Hz
85 to 264 V AC

96 x 96 x 120 mm (W x H x D)
Flush
Material: Polycarbonate resin
Color: Dark grayIndication
Indicates PV. Red LED 3-digits, Character size: 14.3 x 8.0 mm (H x W)
Structure
ON indicator: The green LED lights when control output is ON.
OFF indicator: The red LED lights when control output is OFF.
ALARM indicator: The red LED lights when alarm output is ON.
Setting
Potentiometer Sets SV. Scale length: 121 mm (Angle 240 degrees)
Structure
Function key
RESET Key : Performs Auto-reset.
In the Alarm Setting Mode, this key works as a DOWN Key.
ALARM Key: Moves to the Alarm Setting Mode.
In the Alarm Setting Mode, this key works as an UP Key.
Control Structure SV setting
Analog setting by the potentiometer
Indication
Indication accuracy Within 0.5% of each input span 1 digit
Performance Input sampling
250 msperiodControl
Setting accuracy Within 1.0% of each input span
Performance Control action
PD Control action (with Auto-reset function, DIP switch No.1: OFF)
ON/OFF Control action (DIP switch No.1: ON)
Proportional band 2.5% of each input span
Integral time
50 seconds
Proportional cycle Relay contact output: 30 seconds
Non-contact voltage output: 3 seconds
ON/OFF
0.6% of each input span
hysteresis

10

Control output

Alarm
Function

Alarm output

Insulation/
DielectricStrength

Circuitinsulation
configuration

Relay contact, 1c

Control capacity: 5 A 250 V AC (resistive load)
2 A 250 V AC (inductive load cos =0.4)
Electrical life: 100,000 cycles
Non-contact voltage 12 V DC 15%, Max 40 mA DC (short circuit(for SSR drive)
protected)
The Alarm action point is set as a deviation from SV (except Process
alarm). When the PV is out of the range, the alarm output turns ON or OFF(in the case of High/Low Limit Range alarm).
If the Alarm Function is specified, one type can be selected with the DIP
switch: No Alarm Action, High Limit alarm, High Limit with Standby alarm,
Low Limit alarm, Low Limit with Standby alarm, High/Low Limits alarm,
High/Low Limits with Standby alarm, High/Low Limit Range alarm, Process
High alarm and Process Low alarm.
For details, refer to Section “7.2 Alarm Action”. (pages 9, 10)
Setting accuracySame as the Setting Accuracy of Control Performance
ActionON/OFF action
Hysteresis
1
OutputRelay contact, 1c
Control capacity:3A 250 V AC (resistive load)
1 A 250 V AC (inductive load cos =0.4)
Electrical life: 100,000 cycles
1
2

Control
output

CPU

Input

6

Attached
FunctionsPowersupplyElectrically insulated

Alarm
output16
17
18

Insulation resistance 10 M minimum, at 500 V DC (between each terminal)
Dielectric
1.5 kV AC for 1minute: Between input terminal and power terminal,
strength
Between output terminal and power terminal
Power failure
The setting data is backed up in the non-volatile IC memory.
countermeasureSelf-diagnosis

The CPU is monitored by a watchdog timer, and if an abnormal status
occurs, the controller is switched to warm-up status.
Automatic cold
This detects the temperature at the connecting terminal between thejunction tempera- thermocouple and the instrument, and always maintains it at the same status
ture compensation as if the reference junction location temperature was at 0 (32 ).
Burnout
If the thermocouple or RTD input is burnt out, the PV Display flashes [],and the control output is turned OFF.
Input error
Contents, Indication
Control Output
Overscale: If PV has exceeded the Indication range
OFFhigh limit value, [] flashes.
Undersacle: If PV has dropped below the IndicationOFF
range low limit, value, [] flashes.
Input
K
J
Pt100

Other

8
9

3
4

7

Input Range
0 to 400
0 to 400
0 to 100

Warm-upindication

Indication Range-50 to 450-50 to 450-50 to 150

Control Range-50 to 450-50 to 450-50 to 150

Sensor input characters and temperature unit [K:, J:, Pt100:] are indicated on the PV Display for approx. 3 seconds after power-on.
Power consumption Approx. 5 VA
Ambient temperature 0 to 50
Ambient humidity 35 to 85 %RH (non-condensing)
WeightApprox. 370 g
Accessories included Mounting brackets: 1 set, Instruction manual: 1 copy
11

9. Troubleshooting

If any malfunctions occur, refer to the following items after checking that power is being supplied to thecontroller.
Controller Status
ProblemPossible Cause and Solution
PV Display
ON/OFF/ALARM Indicator
Temperature Indication is
The OFF Indicator lights. • Disconnection of thermocouple,
does not rise. unstable.
compensating lead wire or RTD• Imperfect connection at the input terminal section
Indicates a value
The ON Indicator lights.
• Burnout or imperfect connection of heater
around room
• Malfunction of the control equipment such astemperature.
electromagnetic switch, SSR.
• Fuse burnout
No indication
The ON or OFF• Burnout or imperfect connection at the power
Indicator does not light.
circuit• Specified voltage has not been applied.
Indicates the
The ON Indicator lights.
• Thermocouple or RTD is shorted.
negative value or• Improper mounting (insertion) of
a value aroundthermocouple, RTD
room temperature.
• The polarity of thermocouple orcompensating lead wire is reversed.
• RTD specifications are not suitable.
Temperature A value greater than The OFF Indicator lights. • Malfunction of electromagnetic switch
rises too
the SV is indicated.
contactmuch.
• Malfunction of control equipment such as SSR
The control
The value on theFlashes in fast cycles.
• There may be equipment that interferes withis unstable.
PV Display
or makes noise near the controller.
fluctuates.
• AC leaks into the sensors.
• Imperfect connection at the terminal section
The alarm
Indicates the
The ALARM Indicator• The alarm output control circuit is broken.
output is not range of alarm
lights.
turned ON.
output ON.
The ALARM Indicator• The Alarm Type is not properly specified.
turns off.
• The Alarm Value is not set properly.

***** Inquiry *****For any inquiries about this unit, please contact our agency or the vendor where you purchased the unit after
checking the following.
[Example]• Model --------------------------- ACN-210-R/E• Serial number ----------------- No. 098F05000
In addition to the above, please let us know the details of the malfunction, or discrepancy, and the operating
conditions.

SHINKO TECHNOS CO., LTD.
OVERSEAS DIVISION

Head Office : 2-5-1, Senbahigashi, Minoo, Osaka, Japan
http://www.shinko-technos.co.jp/e/
URL:
Tel : +81-72-727-6100
E-mail:overseas@shinko-technos.co.jp
Fax: +81-72-727-7006

12