Time
OUT1
OUT2
OUT3
LON LON LON LON
P=20
P=0
P=30 P=50
P=70
P=50 P=30 P=20 P=0
LOF
LOF
LOF
LOF
OFF
OFF
OFF
ON
ON
ON
CM=PO
OC1=20
OC2=30
OC3=50
OC4=0
Fig.4 Control by optimisation of the available power
Load
start
Neutral
zone
Load
stop
t<LOF
SP+DBH
Pressure
SP+DBL
SP
SP
SP+PB
Pressure
Time
Control due to
integral action
PWM
0%
100%
Fig.5 PWM output control
WIRING DIAGRAMS
1
2
3
4
115÷230Vac
DI3
COM
COM
DI5 DI4
DI1
DI2
2-T
NTC10K
1-P
MS27-1SE-B
Power
Supply
L
N
data I/O
RS485
PC comm.
5(1)A
5(1)A
A
B
5(1)A 5(1)A
7(2)A
0...100%
ALR
PWM
OUT4
OUT3
OUT2
OUT1
I
P
0/4 - 20mA
GND
+12Vdc
24
5
4
21
20
19
18
9
8
22
11 12
23
14
13
17
16
15
7
6
3
2
1
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
VIA PADOVA, 25
31046 ODERZO /TV /ITALY
TEL. +39 - 0422 815320
FAX +39 - 0422 814073
www.lae-electronic.com
E-mail: [email protected]
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 or .
The following indications may also appear:
Controller in stand-by
Low refrigerant level alarm
Over range or probe failure
Generic alarm
High pressure alarm
High measured value alarm
Low pressure alarm
Low measured value alarm
Low compressor oil alarm
Periodic maintenance warning
INFO MENU
To have access to the info menu, press button . The available info is:
...
Output 1..4 state / hours of operation
Min input value measured.
Max. input value measured.
Keypad state (lock)
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
Display of hours of operation of out1…out4 outputs
With button
■
or select the output;
Display the ON/OFF state of output by pressing button
■
;
While holding down button
■
, press button to display the hours of
operation (multiplied by 1000); the “h” LED blinks.
While holding down button
■
, press button to display the hours of
operation; the “h” LED is lit.
Warning: the hours of operation of stages are not stored, ‘---‘ is
■
displayed.
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
■
Set
for at least half second, to display the setpoint value;
If the second setpoint has been enabled (see
■
DI1
,
DI2
), before its value appears, the display shows “2SP”;
By keeping button
■
Set
pressed, use button or to set the desired value (adjustment is within the minimum
SPL
and the maximum
SPH
limit).
When button
■
Set
is released, the new value is stored.
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
■
or wait for 10 sec.
Reset of all stored alarm.
Press button
■
to display the type of any alarm in the list;
By keeping button
■
pressed, press button for 1 second, until the
inscription ‘non’ appears.
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.
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.
%
°C
h
Set
Pressure display in bar
°C
Temperature display in °C
%
Percentage of use of available power
h
Hours of operation (LED lit)
h
Thousands of hours of operation
(LED blinking)
Alarm
Stand-by button
Set
Setpoint button
Info button
Alarm display button
Increase button
Decrease button
Fig.1 - Front Panel
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.
MS27 INSTRUCTIONS FOR USE
DESCRIPTION
INDICATIONS
