Digital Indicating Controller

LT23A SERIES
Easy to use small size controller at reasonable price
CE RoHS compliance
LT 23A series is a 48×48mm digital indicating controller withindicating accuracy of ±0.5% and the control cycle of approximately 0.5 seconds.
There are two type of mounting methods, terminal block typeand socket type.
3 types of auto tuning functions and overshoot suppressionfunctions are provided and highly safe control is achieved.
Combination of internal computing function and enriched input and output option support various usage scenarios.
Special loader software provides ease of setting operations
and data acquisition.

■FEATURES■MODELS●Compact design
Short depth of instrument (case 60mm) saves the space of instrument
and control board.
●Enriched input types
Thermocouple group, resistance thermometer group, DC voltage / DCgroup can be selected. Input types can be changed within each group.
●Outstanding controllability
Control system can be selected from two-position control, PID control
and self-tuning.
It has overshoot suppression function and high functionality PID.
●3 type of auto tuning
Can be selected from normal, rapid-response, safe tuning on the controltarget.
●Various input / output signal (optional) are available
Current transformer input 2 points, event output 3 points (Max), remotesignal input 2 points, communication interface (RS485).
●Terminal block type and socket type are available●Conformance to international safety standards
Conformance to CE marking, RoHS
●Loader software is available
Various parameter settings and data acquisition can be done easily using
loader software (sold separately) .

LT23A□□□□□□□□□
Measur- Control I/O
Terminaling input output option type Power Extra

48mmX48mm front size

LT23A1Thermocouple input

2RTD input

8DC voltage/current input
Control output 1 Control output 2*2 1 05 0
*1 5 3*1 5 5②⑦⑤③Status display lamp④[FUNC] key :⑤[MODE] key :⑥＜,∨,∧ Key :⑦Recorder connector :SSR drive pulse output—

SSR drive pulse output SSR drive pulse output

3 0

Current output—*1 3 3Current output

Current output—

Event output 3 points*1,*3 02

Event output 3 points,CT input 2 points,External signal input 2 points*1,*3 03

Event output 3 points,CT input 2 points,Communication interface RS485*5 04

Event output 2 points (independent contact)*1,*3,*5 05

Event output 2 points (independent contact),
CT input 2 points,External signal input 2 points
Event output 2 points (independent contact),
CT input 2points,Communication interface RS485*1,*3,*5 06⑥②Lower display :—SSR drive pulse output Current output

01①①Upper display :ON-OFF pulse

00■PARTS NAMES OF FUNCTIONS④③Specifications

Terminal block type

0Displays PV values (preset temperature,etc) orsettings items.
Displays SP values (set temperature,etc) andother parameter values.
RDY : Lights when READY (Control stop)
MAN : Lights when MANUAL (manual mode)
EV1 to EV3 : Lights when event outputs are ON.
O1 to O2 : Lights when the control output is ON.
The operations which has been set beforehand canbe done by pushing the key for 1s or more.
The function is disabled at factory default.
Switches the display.
Used for incrementing numeric values andperforming arithmetic shift operation.
Connects to a personal computer by using USBloader cable.



Socket type*4 SA

100-240 V AC

D24V AC/DC

00 No additional treatment
Y0 Complying with the traceability certification*1: Cannot be selected for the socket type *2: Only 1a contact applicable for the socket type
*3: Current transformer is sold separately *4: Socket is sold separately*5: Cannot be selected for 24V AC/DC power supplyNote) For ON-OFF pulse 2 control outputs, even output(option) will be used as control outputs.
There is 3 points (common) and 2 points (independent contact) so please selectdepending on the usage.

PSE-809

LT23A Series
48x48mm compact body

IP66 protection structure of dust
and water proof

48mm60mm48mm
Compact body of 48x48mm and 60mm in depth.
There is not only panel mounting type but also socket type,so it can correspond to multiple types of installations such as
panel mounting type and DIN rail mounting type.

Front of LT23A employs IP66 protection structure of dust-proof
and water-proof.

Advanced controllability
Overshoot suppression
factor Small(SP)
(SP)
PVPV

Overshoot suppression
factor Large

High-performance PIDPIDTimeTime

Easy-to-read display
On the display, measuring value (PV) is indicated in green
and setting value (SP) is indicated in orange LEDs

Frequently used operation can be assigned to the FUNC key
By assigning frequently used operation such as RUN/READY
to the FUNC key, only one press of a button enables switching
the functions.

Easy-to-read display
Measuring input

Control output (select at model)*Group selection by the model

ON-OFF pulse outputs

Thermocouple 12 types
RTD 2 types
DC Voltage / Current 6 types

Event output (option)

Current transformer input (option)
2 points

3 points
2 points (independent contact)

External signal input (option)
2 points
Loader connector
Support loader software 1 port

Communication (option)
RS485 1 port

*Various parameter settings are available from PC by using dedicated loader software. However, it requires exclusive loader cable (sold separately).

Internal event can be output as external
contact output by logical operation

Loader software (sold separately)

On LT23A…

Event 1
Event 2
Event 3

ProgramOperation

3 points of event can be output

Result of the logical operation which performed on selected five pointsof various internal events is able to be assigned to the three points ofexternal digital outputs. It can simplify process of event outputs which
logical operation was conventionally performed on receiver side.

Various parameter settings and data acquisition are available by connecting
this controller to the PC which the loader software is installed.

2

■ SPECIFICATIONS●Input specifications●General specifications

Input signal:

Operation temperature:
0 to 50℃
Power supply voltage range:
AC power supply model 100 to 240 V AC, 50/60Hz
DC power supply model 24 V AC, 50/60Hz/24V to 48V DC
Power consumption:
AC power supply model 12 VA or/and lower
DC power supply model 7 VA or/and lower (24V AC) 5W
or/and lower (24V DC)
Safety standards: CE marking compliant product
Structure:
IP66 (front part)
Weight:Terminal block type: 150g
Socket type: 200g (including socket)

Group selection by the models (Thermocouple, Resistance
Thermometer, DC voltage/current)
Range type:
Refer to a measuring range table
Input sampling cycle:
500ms
Accuracy rating: ±0.5%FS±1digit●Control specifications
Output type:

ON-OFF pulse output type:1c 250V AC, 30V DC 3A(resistance load)
Current output type:
0 to 20 A DC, 4 to 20 mA DC (Itcan be changed by the setting)
SSR drive pulse output type:
19V DC±15%, Internal resistance82Ω, Allowable current Max.
24mA DC■ ACCESSORY (Sold separetely)■ ACCESSORY
Model

Item

Attachment (for terminal block type)

LTA-P205

Hard cover

ManualL2A-11-□

Soft cover

LTA-P203

Gasket (for terminal block type)

LTA-P206

Terminal cover

LTA-P204

Current transformer

LTA-P207 (5.8mm hole dia.), LTA-P208 (12mm hole dia.)

Item■ OPTIONAL SOFTWARE
Item

Model

Model
LTA-P202

Attachment (for terminal block type)

LTA-P205

Gasket (for terminal block type)
20 pieces

LTA-P206

Loader software (cable included)

LTA-S001

Socket

LTA-P201

Loader software

LTA-S002

Plug coversion cable for LT23A

LTA-P209

Loader cable

LTA-S003

Shunt resister 250Ω

RZ-EX250■ MEASURING RANGE
C01
Set value

Input type

K

J
Thermocouple

E
TR
S
B
N
Platinel
WRe5-26

RTD

DC voltage/current

DIN U
DIN L
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt1000 to 1V
1 to 5V
0 to 5V
0 to 10V
0 to 20mA
4 to 20mA

12
3
4
5
6
9
10
11
13
14
15
16
17
18
19
20
21
24
25
41
42
43
44
45
46
51
52
53
54
63
64
67
68
84
86
87
88
89
90

Measuring range-200
to1200℃
0to1200℃
0.0
to 800.0℃
0.0
to 600.0℃
0.0
to 400.0℃-200.0to 400.0℃
0.0
to 800.0℃
0.0
to 600.0℃-200.0to 400.0℃
0.0
to 600.0℃-200.0to 400.0℃
0to1600℃
0to1600℃
0to1800℃
0to1300℃
0to1300℃
0to1400℃
0to2300℃-200.0to 400.0℃-100.0to 800.0℃-200
to500℃-200
to500℃-200
to200℃-200
to200℃-100
to300℃-100
to300℃-50.0
to 200.0℃-50.0
to 200.0℃-50.0
to 100.0℃-50.0
to 100.0℃
0.0
to 200.0℃
0.0
to 200.0℃
0to500℃
0
to500℃

Measuring accuracy±0.5%FS±1digit
Minus area is±1.0%FS±1digit
Range with decimal
point is±0.5%FS±2digit
Under 260℃：±5%FS,260-800℃：±1%FS
Minus area is±1.0%FS±2digit±0.5%FS±1digit

The scaling and decimal point
position can be changed variably
in a range of -1999 to +9999±0.5%FS±1digit

Lower limit of indication value of B thermocouple is 20℃*●Applicablestandards
・Thermocouple
K,J,E,T,R,S,B,N :Platinel :WRe5-26 :DIN U,DIN L :JIS C 1602-1995
Engelhard Industries(ITS90)
ASTEM E988-96(Reapproved 2002)
DIN43710-1985

・Resistance thermometer
Pt100 :JIS C 1604-1997
JPt100 :JIS C 1604-1989

3

■TERMINAL BOARD●Terminal block type

●Socket type
CT input

Control output

Control output

Event output

NONOCOM

ON-OFF pulse

ON-OFF pulse

RelayNCNC

Event output

SSR driver pulse

SSR driver pulse
Relay
Individual contact

COMRelay

SSR driver pulse
Current

Current

Measurement input

Relay
Individual contact

SSR driver pulse
SSR driver pulse

Power supply
100-240V AC

Thermocouple
Power supply

Current

Current
Current

Current

24V AC
24-48V DC(Non polar)

Measurement input

24V AC
24-48V DC(Non polar)

RTD

100-240V AC−

Voltage
Socket terminal number

Thermocouple●RS485 communication connection

DI/communication

16

RTD

1718

RS-485

Remote signal input

Cautions for handlingCurrent

Do not connect the external resistor because this unit hasa built in termination resistor.

Communication interface
RS485

Voltage

Example: Method to connect with 5 line type instrument.

■DIMENSIONS●Terminal block type

●Panel cutout

Compliant panel board thickness 9 max●Separate installation

60
Mounting(Accessories)
13

72

1483

15

94

16

105

17

116

18

12+0.545 0

45 +0.5
01

More than 30

More than 50

4859

Terminal screws M3□44.848● Closed installation

45 +0.502（48xN-3）+0.5
0
N indicates No ofdevices to be mounted.

●Socket type
●Wiring terminal block482

□44.8

74.2
61.23126.551

Terminal screws M3.5876544871

Mounting hole for 2-M440
9311123.4

10Unit : mmSpecifications subject to change without notice. Printed in Japan (I) 2014. 832-8 KUMANO-CHO,ITABASHI-KU,TOKYO 173-8632
Telephone : +81-3-3956-2171
Facsimile : +81-3-3956-0915
E-mail : inter@chino.co.jp
Website : www.chino.co.jp/"