Digital Indicating Controller

LT35A/37A SERIESLT 35A/37A series is digital indicating controller withindicating accuracy of ±0.2% and the control cycle ofapproximately 0.3 seconds.
3 types of auto tuning functions andovershootsuppression functions achieve superior control stability.
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●Compact design
Short depth of instrument (case 65mm) saves the space of instrument
and control board.
●Universal inputInput types is user-changeable from among thermocouple, resistancethermometer, DC voltage and DC current.
●Outstanding controllability
Control system can be selected from two-position control and PID
control.
It has overshoot suppression function and high-functional PID.
●3 type of auto tuning
Can be selected from normal, rapid-response, stable tuning on thecontrol target.
●Various input / output signal (optional) are available
Current transformer input 2 points, event output 3 points (Max), remotesignal input 4 points, communication interface (RS485).
●Conformance to international safety standards
CE marking, RoHS
●Loader software is available
Various parameter settings and data acquisition can be done easily
using loader software (sold separately) .

■PARTS NAMES OF FUNCTIONS①③⑥⑧⑨⑦⑤⑦⑧

LT35A□□□□□□□□□/LT37A□□□□□□□□□
Measur- Control I/O
Terminaling input output option type Power ExtraSpecifications

LT35A

48mmX96mm front size

LT37A

96mmX96mm front size
Universal input

0Control output 1

Control output 2

1 0

ON-OFF pulse output—

5 0

SSR drive pulse output—5 3

SSR drive pulse output Current output

5 5SSR drive pulse output SSR drive pulse output

3 0

Current output—3 3

Current output

Current output

1

Event output: 3 points①2

Event output 3 points,
Transmission signal output (current output)②*2,*4 4

Event output 2 points (independent contact)

③

*2

5

Event output 2 points (independent contact),
Transmission signal output (current output)

*4

②
④⑤

■MODELS

④⑥⑨⑩

—

0⑩

① Upper display :Displays PV values (measuring temperature, etc.)
or setting items.
② Lower display :Displays SP values (preset temperature, etc.) andother parameter set values.
③ Status display lamp :MAN : Lights when MANUAL (manual mode)
EV1 to EV3 : Lights when event outputs are ON.
01 to 02 : Lights when the control output is ON.
④ Multiple functions indicating lamp:
User-settable max. 3 sets combination of conditionand status as preferred functions (alarm, READY,etc.).
⑤ [FUNC] key :Press 1 second or longer，
then enters frequently
used functions and operations set in advance.
The function is disabled at factory default.
⑥ [DISPLAY]/[DSP] key: Switch display in operation mode. Or back tooperation mode from parameter setting mode.
⑦ [MODE] key :Switches the display.
⑧＜,∨,∧ Key :Used for incrementing numeric values andperforming arithmetic shift operation.
⑨ [ENT] key :Starts to change settings and set value⑩ Loader connector :Connects to a personal computer by using USB
loader cable.



*1 1

Current transformer input 2 points
External signal input: 4 points*1 2

Current transformer input 2 points
External signal input: 4 points
Communication interface RS485

0Terminal block typeA

100 to 240 V ACD24V AC/DC

00 No additional treatment
Y0 Complying with the traceability certificate*3 T0 Tropical treatment*3 K0 Sulfur resistance treatment*1: Current transformer is sold separately.
*2: 24V AC/DC power supply can not be selected.
*3: Non-conforming to CE, UL/cUL.
*4: Event output are 2 types, specify models of 3 point (common) or 2 points (independent).

PSE-810

LT35A/37A SeriesCompact size

Correspond to heat / cool control
PV96mm96mm

HeatOutput 1CoolOutput 2MV
65mm
48mm

65mm

96mm

SPControl output of heat or cool can be assigned to the output 1and 2. PV and SP can also be assigned and used as transmission
signal output.

There are size 48x96mm and 96x96mm available.
Depth is only 65mm, so it is space saving for any installation.

Advancedcontrollability

Overshoot suppression
factor Small(SP)
(SP)
PVPV

Overshoot suppression
factor Large

High-performance PID
PID

TimeTime

In addition to the conventional PID, “High-performance PID”
is available which has unique algorithm aim to converge
hunting quickly to decrease settling time.

By “Overshoot suppression function” which controls overshoot at SPchanging and/or disturbance response, the control has been able todevelop stronger resistance for disturbance and superior stability.

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 Auto/Manualand RUN/READY to the FUNC key, only one press of a button
enables switching the functions.

Various combinations of input and output
Universal input
Thermocouple
15 typesRTD
2 types
DC Voltage / Current 9 types

Control output (select at model)
ON-OFF pulse output
Current output
SSR drive pulse output

Current transformer input (option)
2 points

Transmission signal output (option)
Measuring value (PV)
Setting value (SP)Control output (MV) etc.

External signal input (option)
4 points

Event output (option)
3 points
2 points (independent contact)

Communication (option)
RS485 1 port

Loader connector
Support loader software 1 port

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

Internal event can be output as external
digital (contact) output by logical operation.

Loader software (sold separately)

On LT37A…

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 connectingthis controller to the PC which the loader software is installed.

2

■ SPECIFICATIONS

DC power supply:Power consumption:
DC power supply:●Input specifications
Input signal:

Universal input (Thermocouple, Resistance Thermometer, DCvoltage/current)
Range type:
Refer to a measuring range table
Input sampling cycle: 300ms
Accuracy rating: ±0.2%FS±1digit
Reference junction compensation accuracy:±0.5ºC (at ambient temperature 23ºC ± 2ºC)

Safety standards:
Weight:■ OPTION
External signal input●Control specifications
Output type:

ON-OFF pulse output type 1c 250V AC/ 30V DC 3A(resistance load)
Current output type 0 to 20mA DC, 4 to 20 mA DC (It can bechanged by the setting)
SSR drive pulse output type 19V DC±15%, Internal
resistance 82Ω, Allowable current Max. 24mA DC

Transmission signal output●Event output
Output point:
Contact capacity:
Output type:Type:

24 V AC, 50/60Hz/24V DC
AC power supply: 12 VA and/or lower
12 VA and/or lower (24V AC) 8W and/or lower(24V DC)CE marking compliant product
LT35A 250g, LT37A 300g

Current transformer input
Max. 3 points
250V AC/ 30V DC 2A (resistance load)
Relay output 1aAbsolute value, deviation, loop diagnosis, timer, heater
disconnection and etc. Total 30 types*Event output is a standard feature.

Communication interface●General specifications
Ambient temperature range: 0 to 50°C
Power supply voltage range: AC power supply: 100 to 240 V AC, 50/60Hz

Input point: 4 points
Function: AUTO/MANUAL, RUN/READY, SV, Timer
Stop/Start and etc. Total 17 functions
Output type: 0 to 20mA DC or 4 to 20mA DC current
outputAllowable load resistance: 600Ω and/or lower
Output accuracy: ±0.2% FS (at ambient
temperature 23ºC ± 2ºC), however, 0 to1mA is at±1% FS(CT) Input point: 2 points
CT sold separately: Ø5.8 (LTA-P207), Ø12 (LTAP208)
Measuring current: 0.4 to 50.0A
Display accuracy: ±5% FS
Communication type: RS485
Connection unit: Max. 31 units
Communication speed: Max. 38,400bps
Communication protocol: MODBUS
Terminating resister: Connection prohibited■ MEASURING RANGE
C01
Set value

Input typeKJ
Thermocouple

ETRSB
N
Platinel
WRe5-26

RTD

DC voltage/current

NiMo
PR40-20DIN U
DIN L
CR-AuFe
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt100
Pt100
JPt1000 to 10mV−10 to 10mV
0 to 100mV
0 to 1V
1 to 5V
0 to 5V
0 to 10V
0 to 20mA
4 to 20mA

12
34
567
8
9
10111213
14
15
16
1718
1920
2122232425
26
41
42
43
4445
46
47
48
4950
5152535455
5657585960
616263646566
6768818283848687888990

Measuring range
−2000
0.0
0.0
0.0
−200.0−200.00
0.0
0.0−200.00.0
0.0−200.0
0
0
0
0
00
0
0
0
−200.0−100.00.0−200.0−200.0−200.0−200.0−100.0−100.0−100.0−100.0−100.0−100.0
−50.0
−50.0
−50.0
−50.0
−60.0
−60.0
−40.0
−40.0
−10.00−10.00
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0

to
to
toto
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
toto
to
to
to
to
to
to
to
to
to
to
to
toto
to
to
to
to
to
to
to
totototototototototototo

Accuracy
1200℃
1200℃
800.0℃
600.0℃
400.0℃
400.0℃
200.0℃
1200℃
800.0℃
600.0℃
400.0℃
800.0℃
600.0℃
400.0℃
1600℃
1600℃
1800℃
1300℃
1300℃
1400℃
2300℃
1300℃
1900℃
400.0℃
800.0℃
360.0 K
500.0℃
500.0℃
200.0℃
200.0℃
300.0℃
300.0℃
200.0℃
200.0℃
150.0℃
150.0℃
200.0℃
200.0℃
100.0℃
100.0℃
40.0℃
40.0℃
60.0℃
60.0℃
60.00℃
60.00℃
100.0℃
100.0℃
200.0℃
200.0℃
300.0℃
300.0℃
500.0℃
500.0℃

The scaling and decimal point
position can be changed variably
in a range of -1999 to +9999±0.2%FS±1digit
Minus area is±0.4%FS±1digit

Under 260℃：±4.0%FS, 260-800℃：±0.4%FS±0.2%FS±1digit, Minus area is ±0.4%FS±1digit
0〜300℃：±2.5%FS, 300 to 800℃：±1.5%FS, 800 to 1900℃：±0.5%FS±0.2%FS±1digit, Minus area is ±0.4%FS±1digit±1.5K±0.2%FS±1digit±0.2%FS±1digit

Lower limit of indication value of B thermocouple is 20℃*●Applicablestandards
・ThermocoupleK,J,E,T,R,S,B,N :Platinel :WRe5-26 :DIN U,DIN L :NiMo :JIS C 1602-1995
Engelhard Industries(ITS90)
ASTEM E988-96(Reapproved 2002)
DIN43710-1985
ASTEM E1751-00

PR40-20 :CR-AuFe :Johnson Matthey
Hayashi Denko

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

■ ACCESSORY■TERMINAL BOARD

Item

Model

Attachment (for terminal block type)

LTA-P307

Manual

L3A-11-□

Power supplyNO

100-240V AC■ OPTIONAL SOFTWARE

ON-OFF pulse
NC

Item

Model

Loader software (cable included)

Control output

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

LTA-S001

Loader software

LTA-S002

Loader cable

LTA-S003

SSR driver pulse

Event output

SSR driver pulse
Current / SSR driver pulse■ ACCESSORY (Sold separately)
Relay

Item

Current

Model

Hard cover
Soft cover
Terminal cover

LT35A

LTA-P301

LT37A

LTA-P302

LT35A

LTA-P303

LT37A

LTA-P304

LT35A

LTA-P305

LT37A

LTA-P306

Current
Voltage

Relay
Individual contact

Transmission
signal output
CT input
Current

Current transformer

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

Attachment

LTA-P307

Shunt resister 250Ω

EZ-RX250

DI
Measurement input

Remote signal input

Thermocouple

Communication
Communication interface
RS485

RTD

CurrentVoltage■DIMENSIONS●LT35A65

91.8

967.2

65
Bracket(Accessory)

43.8

Terminal screw
M37.2●Minimum clearance
for plural installation
N : Nos. of mounting

more than 30 44 +0.50(48×N-4) +0.5
0more than 30

more than 30

92+0.5092+0.50(96×N-4)+0.50●Minimum clearance
for plural installation
N : Nos. of mounting

92 +0.5092 +0.50●Panel cutout

92 +0.50●Panel cutout
more than 30548
Terminal screw
M391.8

91.8

Bracket(Accessory)

96961055105●LT37A

Unit : mm

Specifications subject to change without notice. Printed in Japan (I) 2014. 12

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Telephone : +81-3-3956-2171
Facsimile : +81-3-3956-0915
E-mail : inter@chino.co.jp
Website : www.chino.co.jp/"