LAE LTR-5 Series Instructions For Use Manual page 57

Pressure
SP+DBH
SP
SP+DBL
t<LOF
ON
OUT1
OFF
ON
OUT2
OFF
ON
OUT3
OFF
LON LON LON LON LOF LOF LOF
P=0 P=20 P=30 P=50 P=70 P=50 P=30 P=20
Fig.4 Control by optimisation of the available power
WIRING DIAGRAMS
RS485
PC comm.
115÷230Vac
A
B
data I/O
OUT1
5(1)A
11 12 17 13
L
N
Power
Supply
TECHNICAL DATA
Power supply
MS27...E 230Vac±10%, 50/60Hz, 3W
MS27...U 115Vac±10%, 50/60Hz, 3W
Relay outputs
OUT1...OUT4 5(1)A
Alarm 7(2)A
Pressure input
type: 0/4...20mA
range: -1.0...45.0bar
resolution: 0.1bar
Temperature input
type: NTC10K (LAE SN4...)
range: -50.0...120.0°C
resolution: 0.5°C (-20.0...80.0); 1°C out of that range
Operating conditions
-10 ... +50°C; 15...80% r.H.
CE (Reference norms)
EN60730-1; EN60730-2-9;
EN55022 (Class B);
EN50082-1
Front Protection
IP55
Load
start
Neutral
zone
Load
stop
Pressure
SP+PB
SP
CM=PO
OC1=20
OC2=30
OC3=50
OC4=0
100%
PWM
0%
Time
Fig.5 PWM output control
LOF
P=0
+12Vdc
I
0/4 - 20mA
GND
P
NTC10K
1
18 21 20 19 6 5 7 2 3 4
COM DI5 DI4 DI3 COM DI2 DI1 1-P 2-T
OUT2 OUT3 OUT4 ALR PWM
5(1)A 5(1)A 5(1)A 7(2)A 0...100%
14 15 16 24 23 22 9 8
1 2 3 4
MS27-1SE-B
VIA PADOVA, 25
31046 ODERZO /TV /ITALY
TEL. +39 - 0422 815320
FAX +39 - 0422 814073
www.lae-electronic.com
E-mail: sales@lae-electronic.com
Thank you for having chosen an LAE electronic product. Before installing the instrument, please read this instruction booklet carefully in order to ensure safe
installation and optimum performance.
DESCRIPTION
°C
%
h
Control due to
integral action
Set
Time
Fig.1 - Front Panel
INSTALLATION
■ The controller, size 71x97x61 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.
■ Connect a pressure transmitter with output 0/4..20mA to input 1-P. Whenever control takes place through temperature, connect an NTC10K probe (part No.
LAE SN4...) to input 2-T.
OPERATION
DISPLAY
Parameter INP selects the input used for control.
■ INP =1-P: Input 1-P (0/4...20mA) is used to control pressure. In the setup the parameters relating to the variable to be controlled (SPL, SPH, SP,...) are
expressed in bar. In normal mode, the display shows the pressure measured in bar, or the corresponding temperature in °C, calculated according to the
refrigerant gas used (see REF). Input 2-T is disabled.
■ INP =2-T: Input 2-T (NTC10K) is used for temperature control. In the setup the parameters relating to the variable to be controlled (SPL, SPH, SP,...) are
espressed in °C. In normal mode the display shows the temperature measured in °C, or the corresponding pressure calculated in bar. Input 1-P is disabled.
In normal mode it's also possible to display the percentage of available power used. To modify the type of display, press
The following indications may also appear:
Controller in stand-by
Over range or probe failure
High pressure alarm
Low pressure alarm
Low compressor oil alarm
INFO MENU
To have access to the info menu, press button
Output 1..4 state / hours of operation
...
Max. input value measured.
Access to menu and information displayed.
■ With button or select the data to be displayed;
■ Press button to display the value;
■ To exit from the menu, press button or wait for 10seconds
Reset of hours of operation of out1...out4 outputs and of IHI, ILO recordings
■ With buttons or select the data to be reset;
■ Press button to display the value;
■ While keeping button pressed, use button
SETPOINT (display and modification of desired pressure/temperature value)
■ Press button for at least half second, to display the setpoint value;
Set
■ If the second setpoint has been enabled (see
■ By keeping button pressed, use button
Set
■ When button is released, the new value is stored.
Set
ALARM MENU
The last nine alarms can be displayed in the alarm menu, from the most recent AL1, to the least recent AL9.
Access to menu and display of stored alarm.
■ Press button ;
■ With button or select the data to be displayed;
■ Press button to display the alarm type;
■ To exit from the menu, press button
STAND-BY
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).
KEYPAD LOCK
The keypad lock avoids undesired, potentially dangerous operations, which might be attempted when the controller 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.
MS27 INSTRUCTIONS FOR USE
INDICATIONS
Pressure display in bar
°C
Temperature display in °C
Set
%
Percentage of use of available power
h
Hours of operation (LED lit)
h
Thousands of hours of operation
(LED blinking)
Alarm
Low refrigerant level alarm
Generic alarm
High measured value alarm
Low measured value alarm
Periodic maintenance warning
. The available info is:
Min input value measured.
Keypad state (lock)
Display of hours of operation of out1...out4 outputs
■ With button or
■ Display the ON/OFF state of output by pressing button
■ While holding down button
operation (multiplied by 1000); the "h" LED blinks.
■ While holding down button
operation; the "h" LED is lit.
■ Warning: the hours of operation of stages are not stored, '---' is
.
displayed.
DI1, DI2), before its value appears, the display shows "2SP";
or to set the desired value (adjustment is within the minimum SPL and the maximum SPH limit).
Reset of all stored alarm.
■ Press button to display the type of any alarm in the list;
■ By keeping button
inscription 'non' appears.
or wait for 10 sec.
Stand-by button
Setpoint button
Info button
Alarm display button
Increase button
Decrease button
or .
select the output;
;
, press button to display the hours of
, press button to display the hours of
pressed, press button for 1 second, until the