LT350 Digital Indicating Controller
DIGITAL INDICATING CONTROLLER
LT350 Series
LT350 series, 1/8 DIN size, new digital indicating
controllers feature all functions including newly
developed
PID
algorithms
and
overshoot
suppression function which are convenient in
various control applications.
Measured value (PV)
(Parameter item in setting mode)
Setpoint (SV), control output (OUT) or
blank
[Parameter or data monitoring
(operation mode) in setting mode]
MODEL
LT35
Status display
0-
Mode key
Input signal
0: Standard universal input
3: High temperature
universal input
Down key
Control output 1 (Heating)
1: On-off pulse type
3: Current output type
5: SSR drive pulse type
6: Voltage output type
Control output 2 (Cooling) (option)
(As this option is combined with the option of 2-point
additional event, please specify the code of additional
event as 1 or 3.)
0: Not provided
1: On-off pulse type
5: SSR drive pulse type
Communications interface/
remote contacts input (option)
0: Not provided
R: RS-232C + 2-point remote contacts input
A: RS-422A + 2-point remote contacts input
S: RS-485 + 2-point remote contacts input
1: 2-point remote contacts input
Up key
Select/entry key
FEATURES
Large size 4-digit LED display
Universal input
New PID algorithms built-in
New overshoot suppression function built-in
MODBUS protocol communications for easy
system configuration
Various functions are built-in for easy control.
Only 7mm thickness of the front panel
Conformance to CE, UL and CSA
(UL, CSA: Approval pending)
Water and dust protection conforming to
NEMA250 4X (IEC529 IP66) (option)
MEASURING RANGES
Retransmission signal output (option)
(As this option is combined with the option of 2-point
additional event, please specify the code of additional
event as 1 or 3.)
Input type
0: Not provided
1: 4 to 20mA
2: 0 to 1V
3: 0 to 10V
Additional event output (option)/
CT (option) *
0: Not provided
1: Event output (EV)2 points
2: Heater disconnection (CT)
3: Event 2-point + heater disconnection (CT)
T/C
Water-protection
0: Not provided
1: NEMA4X (IP66)
Power voltage
A: 100 to 240VAC (universal)
D: 24VDC (option)
RTD
* The heater disconnection (CT) is only applied to the
Control output 1 of on-off pulse type or SSR drive
pulse type.
Input range
B
0.0
to
1820ºC
32
to
3300ºF
R
0.0
to
1760ºC
32
to
3200ºF
S
0.0
to
1760ºC
32
to
3200ºF
N
0.0
to
1300ºC
32
to
2350ºF
K
-200
to
1370ºC
-300
to
2450ºF
E
-199.9
to
700.0ºC
-300
to
1250ºF
J
-199.9
to
900.0ºC
-300
to
1650ºF
T
-199.9
to
400.0ºC
-300
to
700ºF
U
-199.9
to
400.0ºC
-300
to
700ºF
L
-199.9
to
900.0ºC
-300
to
1650ºF
WRe5-WRe26
0
to
2310ºC
32
to
4190ºF
W-WRe26
0
to
2310ºC
32
to
4190ºF
PtRh40-PtRh40
0
to
1880ºC
32
to
3400ºF
Platinel II
0
to
1390ºC
32
to
2500ºF
Pt100
-199.9
to
850.0ºC
-300
to
1500ºF
JPt100
-199.9
to
649.0ºC
-300
to
1200ºF
DC
voltage
5V
DC
current
20mA *
0 to 5V
(0.000 to 5.000)
4 to 20mA
(1.000 to 5.000
Converted
value)
into
-
voltage
Scaling
setting
range:
-19999 to 20000
Decimal place can
be adjusted.
Standard
universal
High temp.
universal
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
−
−
−
−
−
○
○
○
○
○
○
○
○
○
○
○
○
−
−
−
−
Note: For the current input, a 250Ω shunt resistor (sold separately) is required.
The ranges marked with ○are built in.
PSEPSE-306A
1
Output specifications:
On-off pulse type
Output signal … On-off pulse conductive signal
Contact ratings …
Resistive load 100VAC 5A, 240VAC 5A, 30VDC 5A
Inductive load 100VAC 2.5A, 240VAC 2.5A, 30VDC 2.5A
Electrical relay life … More than 100,000 times
Pulse cycle … Approx. 1 second to 180 seconds adjustable
Contact protection element … Not built-in [If required, add a
contact protection element (sold separately) externally.]
Current output type
Output signal … 4 to 20mADC, Load resistance … 600Ω or less,
SSR drive pulse type
Output signal … On-off pulse voltage signal
At ON 12VDC ± 20% (load current … 20mA or less)
At OFF 0.8VDC or less
Pulse cycle … Approx. 1 second to 180 seconds adjustable
Voltage output type
Output signal … 0 to 10VDC
Output resistance … Approx. 10Ω
Load resistance … 50kΩ or more
Output limiter: 1 set
High limit … 0.0 to 105.0%, Low limit … -5.0 to 100.0%
Output variation limiter:
0.1 to 100.0%
Output preset: -100.0 to 100.0%
Run/Ready: Run/ready (control stop, output: preset output value)
switching
Preset output: -5.0 to 105.0%
Control at power recovery: Continuous/ready switching
SPECIFICATIONS
INPUT SPECIFICATIONS
Input signal:
Thermocouple … B, R, S, N, K, E, J, T, U, L
Resistance thermometer … Pt100, JPt100
DC voltage … 0 to 5V
DC current … 4 to 20mA [By using a 250Ω shunt resistor (sold
separately) and 5V range (1 to 5V)]
Measuring range:
Refer to the list of measuring ranges.
Total of 14 kinds consisted of 10 kinds of thermocouple, 2 kinds of
resistance thermometer, 1 kind of dc voltage, and 1 kind of dc current
Accuracy ratings:
±0.25% of measuring range ± 1 digit (at reference operation
conditions)
Refer to the details of accuracy ratings.
Reference junction compensation accuracy:
±1.0ºC (23ºC ± 10ºC), ±2.0ºC (-10 to 50ºC)
Temperature unit: ºC or ºF
Sampling period: Approx. 0.5 second
Burnout:
Up scale (thermocouple input/resistance thermometer input)
Allowable signal source resistance:
Thermocouple/mV input … 250Ω or less
V input … 1kΩ or less
Resistance thermometer input … 10Ω or less (per wire)
Input resistance: Thermocouple/DC voltage … 1MΩ or more
DC current … Approx. 250Ω
Measuring current: Resistance thermometer … Approx. 110µA
Measuring input shift (sensor correction):
Can be set by the resolution being 0.1 times the setting resolution
of SV (-1999 to 9999)
Digital filter: 0.0 to 99.9 seconds
Scaling: Range/scale of DC voltage/current input (-1999 to 9999),
optional setting
Scale decimal point: 0 to 3
Maximum allowable input range: DC voltage … ±10VDC
RTD … ±5VDC
Maximum common mode voltage: 30VAC
Common mode rejection ratio:
130dB or more (50/60Hz) (signal source resistance 1Ω or less)
Series mode rejection ratio:
50dB or more (50/60Hz) (signal source resistance 1Ω or less)
EVENT SPECIFICATIONS
Event calculation: 3 points
Event output point:
Transistor output 1 point (EV1)
[2-point relay output (EV2/EV3) can be added as an option.]
Event type:
Setting to each of Event 1/2/3
Absolute value alarm … High/low, standby enable/disable
Deviation alarm … High/low, standby enable/disable
Absolute value deviation alarm … High/low, standby enable/disable
Output value alarm … High/low, standby enable/disable
FAIL, heater disconnection alarm, timer function (EV1/EV2 only)
Event setpoint: Event 1/2/3 individual setting
Event deadband: Can be set by the resolution being 0.1 times the
setting resolution of SV, Setting to each Event 1/2/3
Event output phase: Normal/reverse switching
Event output at Ready: Off/calculation switching
Event output:
Output signal … Transistor open collector output
Contact ratings … 24VDC or less, 50mADC or less
CONTROL SPECIFICATIONS
Control cycle time: Approx. 0.5 second
Control system:
On-off pulse type PID system
Current output type PID system
SSR drive pulse type PID system
Voltage output type PID system
* 2-position control can be selected.
Control setpoint: 2 sets switching, 4-digit setting
Setpoint limiter: Within measuring range
Setpoint ramp function:
Setpoint ramp unit … ºC/minute (common to rising/falling)
Setpoint rising ramp: 0 to 9999 (0 = no operation)
Setpoint falling ramp: 0 to 9999 (0 = no operation)
PV start function … At SV change, power-on, Run/Ready
Control setpoint accuracy ratings:
Relative error to displayed value … ± 1 digit
Auto-tuning: Standard (Manual setting of PID constants possible)
PID constants:
P … 0.1 (0.0) to 999.9% (0 = 2-position)
I … 0 to 9999 seconds
D … 0 to 9999 seconds
PID deadband (gap):
0.0 to 9.9%
Anti-reset windup:
High limit … 0.0 to 100.0%, Low limit … -100.0 to 0.0%
Overshoot suppression function:
ON/OFF selectable
Control operation:
With direct/reverse action switching
DISPLAY SPECIFICATIONS
Display type: 4-digit seven-segment LED display, two lines
Status display … 5 independent LEDs
Display content:
First LED (green) display …
At operation mode: Measured value (PV)
At setting mode: Parameter item
Second LED (red) display …
At operation mode: Setpoint (SV) or control output value (OUT)
At setting mode: Parameter or data monitoring (operation mode)
Status (red/green) …
EV1 (red): Lights when EV1 is activated.
EV2 (red): Lights when EV2 is activated.
EV3 (red): Lights when EV3 is activated.
SV (green): Lights when the SV is displayed in the second
display.
OUT (green):Lights when the control output value is
displayed in the second display.
Operation mode display:
No display function of the operation mode screen, 5 levels
Automatic return:
Returns to operation mode if any key is not pressed for more
than 1 minute in setting mode.
Password: No display function of the setting mode screen by a
password, 3 levels
Key lock: Locking function of parameters, 5 levels
2
GENERAL SPECIFICATIONS
OPTIONS
Rated power voltage:
100 to 240VAC 50/60Hz (universal)
* 24VDC power voltage is available as an option.
Allowable power voltage: 90 to 264VAC
Power consumption: Approx. 14VA (max.)
Operation conditions:
Operation
Reference condition
Normal condition
Ambient
23ºC ± 2ºC
-10 to 50ºC
temperature
(Max.
40ºC
for
closed-installation)
Ambient humidity
55% ± 5%RH
20 to 90%RH
Power supply
100VAC ± 1%,
90V to 264VAC,
24VDC
24VDC ± 10%
Power frequency
50Hz/60Hz ± 1%
50Hz/60Hz ± 2%
Mounting angle
Forward/backward
Forward/backward
±3 degrees or less
±10 degrees or less
Vibration/impact
0m/s2 / 0m/s2
2m/s2 / 0m/s2
Ambient temperature change ratio: 10ºC/H or less
Warm-up time: 30 minutes or more
Power interruption: Parameters are memorized by EEPROM
(Writing: Approx. 1,000,000 times)
Insulation resistance:
Between primary side terminals (*1) and secondary side
terminals (*2) 20MΩ or more at 500VDC
Dielectric strength:
Between primary side terminals (*1) and secondary side
terminals (*2) 1 minute at 1500VAC
*1 = Terminals of power supply, control output event output
*2 = Terminals except above and DC power supply (+, -)
Front and case: Front … Non-flammable ABS
Case … Non-flammable polycarbonate resin
Color: Gray
Installation: Flush panel installation
Weight: Approx. 350g (max.)
Transportation/storage condition (with packing at shipment):
Ambient temperature … -20 to 60ºC
Ambient humidity … 5 to 95%RH (no dew condensation)
Vibration … 0 to 4.9m/s2 (10 to 60Hz)
Impact … 400m/s2 or less
Option
Communications
interface
(RS-232C,
RS-422A or
RS-485)
Retransmission
signal output
Remote contacts
input
Control output 2
(Heating/
cooling)
Additional event
output
INTERNATIONAL STANDARDS
CE: EN61326+A1 *, EN61010+A2
UL: UL3121-1 (approval pending)
CSA (C-UL): C22.2, No. 1010 (approval pending)
NEMA: NEMA250 4X (front panel: option) (equivalent to IEC529 IP66)
Note: Not available for closed-installation
* The display of the measured value and output may vary up to ±10% or ±2mV under the
EMC test ambient.
ACCURACY RATINGS
Input
Accuracy ratings
B
DC voltage
R
S
N
K
E
J
T
U
L
Pt100
JPt100
mV, V
DC current
mA
T/C
RTD
±0.25% ± 1 digit
Heater
disconnection
detection
Details
Not specified for less than 400ºC
400ºC to 800ºC: ±0.5% ± 1 digit
0ºC to 400ºC: ±0.5% ± 1 digit
0ºC to 400ºC: ±0.5% ± 1 digit
exception:
±0.5% ± 1 digit
for -200ºC to 0ºC
Water-proof
DC voltage power
drive
±0.25% ± 1 digit
Contents
The setpoint and the measured value can be
transmitted to a PC, and the parameters can be set by
the PC.
Protocol: MODBUS, RTU mode/Ascii mode switching,
and private protocol
Address: 01 to 99
Communications function: 1 kind to be specified from
setting/data transmission, digital transmission, or
digital remote
* Parameters can be re-written approx. 1 million
times.
Signal in proportion to measured value or setpoint is
output.
Output signal: 1 kind to be specified from 4 to 20mA
(load resistance … 400Ω or less), 0 to
1VDC or 0 to 10VDC (output
resistance … approx. 10Ω, load
resistance … 50kΩ or more)
Output accuracy: ±0.2% of retransmission scale
range
Output resolution: Approx. 1/30000
Retransmission scale: Same as measuring range
The followings can be switched by the remote
contacts input.
Input point: 2 points (No-voltage contacts or transistor
open collector) (Remote contacts rating …
5VDC or more, 1mA or more)
Function: The following functions are allocated by
parameter settings.
(1) Setpoint external switching
(2) Run/ready switching,
(3) Timer start-up
(4) Remote/local switching
Control calculation:
Matching calculation/cooling proportion calculation
switching
Matching calculation parameters
Split direct … 0.0 to 60.0%
Split reverse … 40.0 to 100.0%
Cooling proportion calculation parameters
Cooling proportional band coefficient …
0.00 to 10.00
Deadband … -50.0 to 50.0%
Pulse cycle: 1 second to 180 seconds (cooling side)
Event output point:
Relay output 2 points (EV2/EV3)
Contact ratings:
Resistive load 100VAC 3A, 240VAC 3A
30VDC 3A
Inductive load 100VAC 1.5A, 240VAC 1.5A
30VDC 1.5A
Minimum load 5VDC or more, 10mADC or more
Electrical relay life … More than 100,000 times
Contact protection element … Not built-in [If
required, add a contact protection element
(sold separately) externally.]
Function to detect the heater disconnection by CT
input
Input signal: 5.0 to 50.0AAC (50/60Hz)
Input accuracy: ±5% of full scale ± 1 digit
Resolution: Approx. 1/100
CT: Model CTL-6-S-H is required.
For water-proofing of the front panel, a rubber packing
is inserted between a controller and a panel board.
NEMA250 4X (equivalent to IEC529, IP66)
Note) This option cannot be applied for closed-installation.
Power voltage: 24VDC ± 10%
[To be supplied from (class 2)]
Power consumption: Maximum 8w
±0.25% ± 1 digit
±0.25% ± 1 digit
By using the shunt resistor specified for
current input
ACCESSORIES (Separate purchase is required.)
STANDARD ACCESSORIES
Accessory
Mounting bracket 2 pieces, Instruction manual 1 copy
Terminal cover
Shunt resistor for
current input (250Ω)
3
Remarks
The depth is extended to 132mm by the
terminal cover.
For measurement by DC current of 4 to
20mA
TERMINAL BOARD
B
C
1
11
21
2
12
22
3
13
23
4
14
24
5
15
25
6
16
26
7
17
27
8
18
28
9
19
29
10
20
30
Line A Measuring input/event output 1/control output 1/power supply
No.
Measuring
A
Voltage
(current *)
T/C
RTD
+
+
B
A
1
2
B
3
* For current input
Control output 1 (heating)
Power
Connect a shunt resistor (250Ω, sold separately) to + and – terminals.
Power
Note) 1. All terminal screws are M3.5.
2. For Y-tip or O-tip, use it with the
outside dimension of 7mm or
less.
RS-232C
11
SD
12
13
16
RS-485
SDA
SA
SDB
SB
SG
5
COM1
No.
Load
Power
SSR drive pulse type
Current output type
Voltage output type
On-off pulse output
6
H (NC)
7
C (COM)
8
L (NO)
No.
+
AC power
DC power (option)
9
L (live)
+
10
N (Neutral)
Retransmission output/control output 2/CT/
RDA
SG
EV1+
Line C additional event output
RDB
14
15
Remote contacts input
RD
RS-422A
Retransmission
No.
Control output 2 (cooling)
Communications interface
Line B Communications/remote contacts input
4
SG
DI1+
No.
+
21
22
No.
On-off pulse type
SSR drive pulse type
23
H (NC)
+
24
C (COM)
25
L (NO)
17
DI2+
18
DI3+
19
DI4+
26
CT
20
DI-COM
27
CT
28
EV1
Buffer relay
29
EV2
Buffer relay
30
COM12
Power
DIMENSIONS AND PANEL CUTOUT (Steel plate with thickness of 1 to 10mm is recommended for installation.)
Specifications subject to change without notice. Printed in Japan(I) 2001.9
32-8, KUMANO-CHO, ITABASHI-KU, TOKYO 173-8632
PHONE: +81-3-3956-2171
FAX: +81-3-3956-0915
E-mail: [email protected]
Website: http://www.chino.co.jp
4
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