General
type with simple operation
New
overshoot suppression function
Models LT350 and
LT370 digital indicating controllers feature all functions, which are necessary
for various control applications, including newly developed PID algorithms
and an overshoot suppression function. |
|
 |
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Input Specifications |
|
Input signal |
|
Thermocouple… |
Standard
universal: B, R, S, N, K, E, J, T, U, L
High
temperature universal: B, R, S, N, K,
WRe5-WRe26, W-WRe26, PtRh40-PtRh20, Platinel II |
Resistance
thermometer…Pt100, JPt100
DC voltage…0 to 5V
DC current…4 to 20mADC
A 250
shunt resistor (sold separately) and the 5V (1 to
5V) are used. |
|
Accuracy rating |
±0.25% ± 1 digit (at reference operation
conditions) |
|
Reference junction compensation accuracy |
±1.0°C (23°C±10°C), ±2.0°C (-10°C to 50°C) |
|
Measuring unit |
°C or °F |
|
Sampling cycle |
About 0.5 second |
|
Burnout |
Up scale (thermocouple input, resistance
thermometer input) |
|
Measuring current |
Resistance thermometer … 110µA |
|
Scaling |
Ranges/scales of DC voltage/current input
are optional settings.
(-1999 to 9999) |
|
Scale decimal point |
0 to 3 |
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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 is selectable. |
|
Control setpoint |
2 sets switching, 4-digit
setting |
|
Setpoint ramp function: |
Setpoint ramp unit …°C/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 |
|
Auto-tuning |
Standard (Manual setting of PID constants
enabled) |
|
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 |
|
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 |
|
|
Pulse
cycle |
… |
Approx. 1
second to 180 seconds
adjustable |
Current output type
|
|
Output
signal |
… |
4 to
20mADC |
|
|
Load
resistance |
… |
600
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.
10 |
|
|
Load
resistance |
… |
50k
or
more | |
|
General Specifications |
|
Rated power voltage |
100V to 240VAC 50/60Hz universal power
supply |
|
Allowable power voltage |
90 to 264VAC |
|
Working temperature range |
-10 to 50°C (maximum 40°C at closed
installation) |
|
Working humidity range |
20 to 90%RH (no dew
condensation) |
|
Power consumption |
Maximum about 14VA |
|
Installation |
Panel installation |
|
Weight |
About 350g (LT350)
About 450g
(LT370) |
|
International Standards |
|
CE |
EN61326 + A1 Class A, EN61000-3-2 +
A14 |
|
UL |
UL3111-1 |
|
CSA (C-UL) |
C22.2 No. 1010 |
|
IP |
NEMA4X (IP66) (front
protection) |
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