lae AC2-2 Two Stage Thermostat Instructions

1

2

CONFIGURATION PARAMETERS  

AC2-27 INSTRUCTIONS FOR USE  

TECHNICAL DATA  

REF; HEA Refrigerating control (REF) or heating control mode (HEA) for the auxiliary output.  

2CH  

2HY  

2T0  

■ To get access to the parameter configuration menu, press button  

■ With button or select the parameter to be modified.  

■ Press button to display the value.  

■ By keeping button pressed, use button or to set the desired value.  

■ When button is released, the newly programmed value is stored and the following parameter is displayed.  

■ To exit from the setup, press button or wait for 30 seconds.  

+

for 5 seconds.  

Thank you for having chosen a LAE electronic product. Before installing the instrument, please read these instructions carefully  

to ensure maximum performance and safety.  

0...19.9°  

Differential of thermostat 2. With 2HY=0 the auxiliary output always remains off.  

Power supply  

AC2-27…L* 7…30 Vdc / 12Vac ±10%, 3W  

AC2-27…W 100…240Vac ±10%, 50/60Hz, 3W  

* = in the AC2-27...L version, the power supply  

of the controller and of the loads must be  

of type SELV or PELV.  

0...30min  

Minimum ON time.  

DESCRIPTION  

INDICATION  

After output 2 has been turned ON, it remains active for 2T0 minutes regardless of the  

temperature value measured.  

OUT1 = Channel 1 output  

0...30min  

ON/OFF  

Minimum OFF time (the following parameter will be 2PF).  

After output 2 has been turned OFF, it remains inactive for 2T1 minutes regardless of the  

temperature value measured.  

2T1  

2PF  

OUT2 = Channel 2 output  

L1  

L2  

= Channel 1 setpoint modification  

Relay Outputs (AC2-27..R..)  

OUT1 3.6 FLA, 21.6 LRA 240Vac - 12A resistive  

OUT2 3.6 FLA, 21.6 LRA 240Vac - 12A resistive  

Auxiliary output state in case of probe failure.  

= Channel 1 setpoint modification  

= Alarm  

PAR  

UM  

RANGE DESCRIPTION  

NON;  

ABS;  

REL  

Alarm threshold management.  

ATM  

c; F; Non  

Unit of measure for control. Non is available in the models AC2-27A and AC2-27I.  

NON: all temperature alarms are inhibited (the following parameter will be SB).  

ABS: the values programmed in ALA and AHA represent the real alarm thresholds.  

REL: the values programmed in ALR and AHR are alarm differentials referred to 1SP and 1SP+1HY.  

= Info / Enter button  

r01; r1  

Resolution of measure: r01=0.1°; r1=1°. This parameter is not available when UM=F and  

in the model AC2-27J.  

RES  

SSR Drive (AC2-27..M..)  

OUT1 15mA 12Vdc  

= Modify Setpoint 1 / Decrease button  

= Increase / Modify Setpoint 2 button  

= Exit / Stand-by button  

-50°...SPH Minimum limit for 1SP setting  

SPL  

SPH  

1SP  

1CM  

ON  

ON  

Inputs  

see table of input specifications  

SPL...150° Maximum limit for 1SP setting.  

T[°]  

Fig.1 - Front panel  

T

[

°

]

OFF  

OFF  

SPL... SPH Setpoint (value to be maintained in the room).  

1SP 1SP+1HY+AHR  

1SP-ALR  

1SP+AHR  

1SP-1HY-ALR  

1SP  

INSTALLATION  

Measurement range  

see table of input specifications  

HY; PID  

Control mode.  

Temperature alarm with relative thresholds,  

refrigerating control (ATM=REL, 1CH=REF)  

Temperature alarm with relative thresholds,  

heating control (ATM=REL, 1CH=HEA).  

With 1CM=HY you select control with hysteresis: parameters 1HY, 1T0 and 1T1 are used.  

With 1CM=PID you select a Proportional-Integral-Derivative control mode: parameters 1PB, 1IT,  

1DT, 1AR, 1CT will be used  

■ The AC2-27 controller, size 72x94x47 mm (WxHxD), is to be secured to a DIN rail in such a position as to ensure that no liquid  

infiltrates causing serious damage and compromising safety;  

■ Make sure that electrical connections comply with the paragraph “wiring diagrams”. To reduce the effects of electromagnetic  

disturbance, keep the sensor and signal cables well separate from the power wires.  

-50°...AHA Low temperature alarm threshold.  

Measurement accuracy  

see table of input specifications  

ALA  

REF; HEA Refrigerating (REF) or Heating (HEA) control mode.  

0...19.9° OFF/ON thermostat differential. With 1HY=0 the output is always off.  

1CH  

■ Place the probe T1 inside the room in a point that truly represents the temperature of the stored product.  

ALA...150° High temperature alarm threshold.  

AHA  

ALR  

AHR  

Operating conditions  

-10 … +50°C; 15%...80% r.H.  

1HY  

OPERATION  

ON  

ON  

-12.0...0°  

0...12.0°  

Low temperature alarm differential.  

With ALR=0 the low temperature alarm is excluded.  

DISPLAY  

Reference Norms  

EN61000-6-1  

EN61000-6-3  

EN60730-1  

EN60730-2-9  

High temperature alarm differential.  

OFF  

OFF  

During normal operation, the display shows either the temperature measured or one of the following indications:  

With AHR=0 the high temperature alarm is excluded.  

1SP 1SP+1HY T[°]  

1SP-1HY 1SP  

T[°]  

Controller in stand-by  

Controller in autotuning  

In tuning: timeout1 error  

In tuning: timeout2 error  

In tuning: overrange error  

0...120min Delay before alarm temperature warning.  

NO/YES Stand-by button enabling.  

ATD  

ON/OFF refrigerating control  

(1CM=HY, 1CH=REF)  

ON/OFF heating control  

(1CM=HY, 1CH=HEA)  

Probe T1 overrange or failure  

Room high temperature alarm  

Room low temperature alarm  

SB  

RoHS Directive 2015/863/EU  

REACH Directive 2021/979/EU  

0...30 min Minimum ON time.  

1T0  

1T1  

1PB  

0mA/4mA, Sensor input selection (see table of input specifications).  

T1/T2  

INP  

After output 1 has been turned ON, it remains active for 1T0 minutes regardless of the  

temperature value measured.  

ST1/SN4  

This parameter is not available in the AC2-27A... and AC2-27P...  

Front Protection  

IP50  

0...30 min Minimum OFF time (the following parameter will be 1PF).  

After output 1 has been turned OFF, it remains inactive for 1T1 minutes regardless of the  

temperature value measured.  

-19.9...RHI Minimum range value (in the models AC2-27A…, AC2-27I… only)  

RLO  

RHI  

MENU INFO  

RLO takes the minimum value measured by the transmitter (i.e. the value matching 0V, 0/4mA).  

The information available in this menu is:  

RLO...99.9 Maximum range value (in the models AC2-27A…, AC2-27I… only)  

0...19.9°  

Proportional band width.  

RHI takes the maximum value measured by the transmitter (i.e. the value matching 1V, 20mA)  

M

a

x

i

m

u

m

t

e

m

p

e

r

a

t

u

r

e

r

e

c

o

r

d

e

d

Keypad state lock  

Overshoot  

Steady-state error  

-12.5...12.5° Probe T1 offset.  

OS1  

TLD  

SIM  

Temperature control takes place by changing the  

ON time of the output: the closer the temperature  

to the setpoint, the less time of activation. A small  

proportional band increases the promptness of  

response of the system to temperature variations,  

Minimum temperature recorded  

1SP  

1...30min  

0...100  

Delay for minimum temperature (TLO) and maximum temperature (THI) logging.  

Display slowdown.  

Access to menu and information displayed.  

1PB  

■ Press and immediately release button  

.

Process  

1...255  

AC2-27 address for communication with a PC.  

ASCII and RTU Modbus protocol selection.  

but tends to make it less stable.  

A

purely  

■ With button  

or  

select the data to be displayed.  

to display value.  

ADR  

PRT  

temperature  

proportional control stabilises the temperature  

within the proportional band but does not cancel  

the deviation from setpoint.  

■ Press button  

ASC;  

RTU  

■ To exit from the menu, press button  

or wait for 10 seconds.  

Reset of THI, TLO recordings  

Time  

With 1PB=0 the output is always off.  

■ With button  

■ Display the value with button  

■ While keeping button pressed, use button  

or  

s

e

l

e

c

t

t

h

e

d

a

t

a

t

o

b

e

r

e

s

e

t

.

.

Overshoot  

0...999s  

Integral action time.  

1IT  

INPUT SPECIFICATIONS  

.

The steady-state error is cancelled by inserting an  

integral action. The integral action time, determines  

the speed with which the steady-state temperature  

is achieved, but a high speed (1IT low) may be the  

cause of overshoot and instability in the response.  

With 1IT=0 the integral control is disabled.  

CHANNEL 1 SETPOINT (display and modification of desired temperature value)  

■ Press and release button : the LED L1 blinks, the display shows 1SP for 1 second and then the setpoint associated value.  

■ Press buttons or to set the desired value (adjustment is within the minimum SPL and maximum SPH limit).  

■ To store the new value press button , or wait for 10 seconds.  

1SP  

RANGE [MEASUREMENT ACCURACY]  

MODEL  

AC2-27A...  

AC2-27I...  

INPUT  

RES = r01 (UM = c)  

R

E

S

=

r

1

(

U

M

=

c

)

RES = r1 (UM = F)  

1PBx1AR%  

integral control  

action area  

1PB  

0÷1V  

RLO÷RHI [< ± 3mV]  

---  

Process  

■ To go back to normal mode without saving the new value, press  

.

temperature  

INP = 0mA  

0÷20mA  

4÷20mA  

TC “J”  

CHANNEL 2 SETPOINT  

RLO÷RHI [< ± 0.2mA]  

-50÷750°C [ < ±3°C ]  

---  

Time  

INP = 4mA  

INP=T1  

■ With the auxiliary output set as thermostat control (OAU=THR), it’s possible to modify setpoint 2 during the normal operation  

of the controller.  

0...999s  

Derivative action time.  

1DT  

Overshoot  

---  

---  

■ Press and release button  

: the LED L2 blinks, the display shows 2SP for 1 second if setpoint 2 is an absolute threshold  

AC2-27J...  

AC2-27P...  

-60÷999°F [ < ±5°F ]  

1SP  

(2SM=ABS), alternatively the display shows 2DF, if setpoint 2 is a threshold relative to setpoint 1 (2SM=REL), then the value  

associated to the parameter appears.  

INP=T2  

TC “K”  

-50÷999°C [ < ±3°C ]  

Response overshoot may be reduced by inserting  

a derivative Action. A high derivative action (1DT  

high) makes the system very sensitive to small  

temperature variations and causes instability. With  

1DT=0 the derivative control is disabled.  

-50/-19.9÷99.9/150°C  

[ < ±0.3°C ]  

-100÷850°C  

[<±1°C(-50÷850°), ±2°C]  

-150÷999°F  

■ Press buttons  

■ To store the new value press button  

or  

to set the desired value.  

or wait for 10 seconds.  

PT100  

1PB  

[<±2°F(-60÷999°), ±4°F]  

Process  

temperature  

■ To go back to normal mode without saving the new value, press  

.

-50/-19.9 ÷ 99.9/150°C  

-50 ÷ 150°C  

-60 ÷ 300°F  

INP=ST1  

INP=SN4  

LAE QT1..  

LAE SN4..  

[<±0.3°C(-30÷130°),±1°C] [<±0.3°C(-30÷130°), ±1°C] [< ±0.6°F(-20÷260°),±2°F]  

STAND-BY  

AC2-27T...  

Button , when pressed for 3 seconds, allows the controller to be put on a standby or output control to be resumed (with SB=YES only).  

-50/-19.9 ÷ 99.9/125°C -50 ÷ 125°C -40 ÷ 260°F  

[<±0.3°C(-40÷100°),±1°C] [<±0.3°C(-40÷100°), ±1°C] [<±0.6°F(-40÷210°), ±2°F]  

Time  

KEYPAD LOCK  

0...100%  

1...255s  

Reset of integral action time referred to 1PB  

Decreasing the parameter 1AR reduces the integral control action zone, and consequently the  

overshoot (see figure on paragraph 1IT).  

1AR  

1CT  

The keypad lock avoids undesired, potentially dangerous operations, which might be attempted when the controllers is operating  

in a public place. In the INFO menu, set parameter LOC=YES to inhibit all functions of the buttons. To resume normal operation  

of keypad, adjust setting so that LOC=NO.  

WIRING DIAGRAMS  

Cycle time.  

CONTROLLER AUTOTUNING IN PID MODE  

Before starting  

In the setup mode (see configuration parameters): set 1CM=PID; make sure that 1CH matches the desired operation mode  

(1CH=REF for refrigerating control, 1CH=HEA for heating control); then adjust setpoint 1SP at the desired value.  

It’s the period in which the output ON time changes. The quicker the system to be controlled  

reacts to temperature variations, the smaller the cycle time must be, in order to obtain higher  

temperature stability and less sensitivity to load variations.  

V

TTL  

RS485  

rH  

data I/O  

2

+

3

-

ON/OFF  

Output state in case of probe failure.  

data I/O  

2

3

4

1PF  

OAU  

V^IN V- V+  

Start autotuning  

NON;  

THR;  

AL0;  

AL1  

AUX output operation.  

During normal operation, keep buttons  

time in order to define the dynamic of the process to be controlled. To abort the autotuning function, press ; to start autotuning  

press or wait for 30 seconds.  

+

pressed for 3 seconds. 1CT blinks on the display. With  

+

or  

set the cycle  

NON : output disabled (always off). (the next parameter will be ATM)  

THR: output programmed for second thermostat control (the next parameter will be 2SM).  

AL0: contacts open when an alarm condition occurs (the next parameter will be ATM).  

AL1: contacts make when an alarm condition occurs (the next parameter will be ATM).  

OUT1  

OUT2  

OUT1  

OUT2  

+

N

L

N

L

21 20 19  

18 17 16  

11 12  

21 20 19  

18 17 16  

11 12  

During autotuning  

During the entire autotuning phase, the display alternates TUN with the actual temperature measured. In case of power failure,  

when power is resumed, after the initial autotest phase, the controller resumes the autotuning function. To abort the autotuning,  

ABS;  

REL  

Setpoint 2 mode.  

2SM  

2SP  

Channel 2 setpoint may be absolute (2SM=ABS), or a differential relative to setpoint 1 (2SM=REL)  

without modifying the previous control parameters, keep button  

pressed for 3 seconds. After the autotuning has taken place  

0L0039R01-01 AC2-27  

SPL...SPH Auxiliary output switchover temperature (the next parameter will be 2CH)  

successfully, the controller updates the control parameters and start to control.  

230V~  

230V~  

AC2-27AS2RW-B  

AC2-27JS2RW-A  

Errors  

ON  

ON  

EN  

INSTRUCTIONS FOR USE  

If the autotuning function failed, the display shows an error code:  

■ E1 timeout1 error: the controller could not bring the temperature within the proportional band. Increase 1SP in case of heating  

control, vice versa, decrease 1SP in case of refrigerating control and re-start the process.  

■ E2 timeout2 error: the autotuning has not ended within the maximum time allowed (1000 cycle times). Re-start the autotuning  

process and set a longer cycle time 1CT.  

■ E3 temperature overrange: check that the error was not caused by a probe malfunction, then decrease 1SP in case of heating  

control, vice versa increase 1SP in case of refrigerating control and then re-start the process.  

TTL  

RS485  

OFF  

OFF  

BEDIENUNGSANLEITUNG  

DE  

2SP 2SP+2HY T[°]  

2SP-2HY 2SP  

ON/OFF control in heating  

(2SM=ABS, 2CH=HEA)  

T[°]  

ON/OFF control in refrigeration  

data I/O  

2

3

data I/O  

OUT1  

2

3

4

(2SM=ABS, 2CH=REF)  

W

R

W

OUT2  

■ To eliminate the error indication and return to the normal mode, press button  

.

-19.9...19.9° Temperature differential relative to 1SP. The auxiliary output setpoint is equal to 1SP+2DF  

2DF  

OUT1  

OUT2  

Control improvement  

■ To reduce overshoot, reduce the integral action reset 1AR  

ON  

ON  

12V  

21 20  

N

L

18 17 16  

11 12  

21 20 19  

18 17 16  

11 12  

■ To increase the response speed of the system, reduce the proportional band 1PB. Caution: doing this makes the system less stable.  

■ To reduce swings in steady-state temperature, increase the integral action time 1IT; system stability is thus increased, although  

its response speed is decreased.  

■ To increase the speed of response to the variations in temperature, increase the derivative action time 1DT. Caution: a high  

value makes the system sensitive to small variations and it may be a source of instability.  

OFF  

OFF  

-

+

SSR  

^1SP+2DF+2HY T[°]  

1SP+2DF  

1SP+2DF-2HY  

T[°]  

2DF>0  

12 7...30  

Vac Vdc  

2DF<0  

1SP+2DF  

1SP  

1SP  

-

+

~

~

ON/OFF control in refrigeration. Setpoint 2  

relative to setpoint 1 (OAU=THR, 2CH=REF)  

ON/OFF control in heating. Setpoint 2  

relative to setpoint 1 (OAU=THR, 2CH=HEA)  

230V~  

AC2-27PS2MW-B  

AC2-27TS2RL-A  

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General	Details
Name	lae AC2-2 Two Stage Thermostat Instructions
Make	LAE
Language	English
Filetype	PDF (Download)
File size	0.33 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• LAE

lae AC2-2 Two Stage Thermostat Instructions Overview

Summary of Contents

• Page 1: configuration parameters instructions for use technical data refrigerating control or heating control mode for the auxiliary output. to get access to the parameter configuration menu, press button. press button to display the value. when button is released, the newly programmed value is stored and the following parameter is displayed. to exit from the setup, press button or wait for 30 seconds. the AC2-27 controller is to be secured to a DIN rail in such a position as to ensure that no liquid infiltrates causing serious damage and compromising safety. operating conditions: -10 … +50°C; 15%...80% r.H.
• Page 2: Kühlmodus (REF) oder Heizmodus (HEA) für den Hilfsausgang. Für den Zugriff auf das Konfigurationsmenü die Tasten drücken. Wir danken Ihnen, dass Sie sich für ein Produkt der Firma LAE electronic entschieden haben. Lesen Sie vor der Installation des Gerätes bitte aufmerksam die vorliegende Bedienungsanleitung durch. Die Mindesteinschaltzeit beträgt 0...30min. Nach dem Einschalten bleibt der Ausgang 2 für 2T0 Minuten aktiviert, unabhängig vom Temperaturwert. Die Temperaturregelung erfolgt durch Änderung der EIN-Zeit des Ausganges. Der Sollwert des Kanals 2 kann absolut oder relativ zum Sollwert 1 sein. Die Sperre der Tasten verhindert unerwünschte und potenziell schädliche Handlungen. Die Zeit, in welcher die EIN-Zeit des Ausganges variiert, wird als Zykluszeit bezeichnet. Im Setup-Modus kann 1CM=PID eingestellt werden, um die Autotuning-Funktion zu starten.