2.1 - MOUNTING REQUIREMENTS
This instrument is intended for permanent installation, for indoor
use only, in an electrical panel which encloses the rear housing,
exposed terminals and wiring on the back.
Select a mounting location having the following characteristics:
1) It should be easily accessible;
2) There is minimum vibrations and no impact;
3) There are no corrosive gases;
4) There are no water or other fluid (i.e. condensation);
5) The ambient temperature is in accordance with the opera-
tive temperature (0 to 50 °C);
6) The relative humidity is in accordance with the instrument
specifications (20% to 85 %).
The instrument can be mounted on panel with a maximum
thickness of 15 mm. When the maximum front protection (IP65)
is desired, the optional gasket must be mounted.
2.2 - GENERAL NOTES ABOUT INPUT WIRING
1) Do not run input wires together with power cables;
2) External components (like zener barriers, etc.) connected
between sensor and input terminals may cause errors in
measurement due to excessive and/or not balanced line
resistance or possible leakage currents;
3) When a shielded cable is used, it should be connected at
one point only;
4) Pay attention to the line resistance; a high line resistance
may cause measurement errors.
2.3 - THERMOCOUPLE INPUT
Fig. 3 - Thermocouple input wiring
External resistance: 100
Ω
max., max. error 0.5% of span.
Cold junction: automatic compensation from 0 to 50°C.
Cold junction accuracy: 0.1 °C/°C after a warm-up of 20
minutes.
Input impedance: > 1 M
Ω
.
Calibration: according to EN 60584-1.
Note: Por TC wiring use proper compensating cable preferable
shielded.
2.4 - PT100 INPUT
Fig. 4 - PT100 input wiring
Input circuit: current injection (135 µA).
Line resistance: not compensated.
Calibration: according to EN 60751/A2.
2.5 - PTC/NTC/PT1000 INPUT
Fig. 5 - PTC/NTC/PT1000 input wiring
Input circuit: current injection (25µA).
Line resistance: not compensated.
2.6 - OUTPUTS
Safety notes:
1) To avoid electrical shock, connect supply cables last.
2) For supply connections use 16 AWG or larger wires rated
for at last 75°C.
3) Use copper conductors only.
4) SSR (Solid State Relay) Outputs are NOT isolated. A double
or reinforced isolation between instrument output and power
supply must be assured by the external solid state relay.
a) Output 1
Relay
Contact rating: 8 A /250 V cos
ϕ
=1
3 A /250 V cos
ϕ
=0.4
Operations:
1 x 10
5
SSR
Logic level 0:
Vout < 0.5 Vdc
Logic level 1:
12 V ±20% @ 1 mA
10 V ±20% @ 20 mA.
b) Output 2
Relay
Contact rating: 8 A /250 V cos
ϕ
=1
3 A /250 V cos
ϕ
=0.4
Operations:
1 x 10
5
SSR
Logic level 0:
Vout < 0.5 Vdc
Logic level 1:
12 V ±20% @ 1 mA
10 V ±20% @ 20 mA.
2.7 - POWER SUPPLY
Power consumption: 5VA max.
Supply voltage: 100 V to 240 VAC/DC (+10%)
12 VDC (-15% to +10%)
24 VAC/DC (-15% to +10%)
Notes:
1) Before connecting the instrument to the electrical supply,
make sure that line voltage is equal to the voltage shown
on the identification label.
2) To avoid electrical shock, connect supply cables at the end
of the wiring procedure.
3) For supply connections use 16 AWG or larger wires rated
for at last 75°C.
4) Use copper conductors only.
5) Do not place signal cables parallelly or next to power
cables or to noise sources.
6) The power supply input is NOT fuse protected. Please,
provide a T type 1A, 250 V fuse externally.
7) For DC power supply the polarity is a do not care condition.
3.1 - TECHNICAL SPECIFICATIONS
Case: Plastic, self-extinguishing degree: V-0 according to UL 94.
Front protection: IP 65 (when the optional panel gasket is
mounted) for indoor locations according to EN 60070-1.
Rear terminals protection: IP 20 according to EN 60070-1.
Installation: Panel mounting.
Terminal block: 11screw terminals (screw M3, for cables from
0.25 to 2.5 mm
2
or from 22 AWG to 14 AWG).
Dimensions: 75 x 33 mm, depth 75.5 mm.
Cutout: 71 (-0 to +0.5 mm) x 29 (-0 to +0.5 mm).
Weight: 180 g approximately.
I
nsulation voltage: 2300 V rms according to EN 61010-1.
Display: one 3 digits red display h 12 mm.
Display updating time: 500 ms.
Sampling time: 130 ms.
Resolution: 20000 counts.
Total Accuracy: +0.5% E.S.V. +1 digit @ 25°C of room temp..
Electromagnetic compatbility and safety requirements:
Compliance:directive EMC 2004/108/CE (EN 61326-1),
directive LV 2006/95/CE (EN 61010-1).
Installation category: II.
Pollution category: 2.
Temperature drift: It is part of the global accuracy.
Operating temperature: 0 to 50°C (32 to 122°F).
Storage temperature: -30 to +70°C (-22 to 158°F).
Humidity: 20% to 85% RH, non condensing.
3.2 - HOW TO ORDER
Model
CN38S = Controller with S-touch keyboard (capacitive keyboard)
Input:
T
= TC J or K
RTD
= PT100
TH
= PTC, NTC or PT1000
Output Out1:
R1
= SPDT 8A-AC1 relay
DC1
= VDC for SSR.
Output Out2:
R2
= SPDT 8A-AC1 relay
DC2
= VDC for SSR.
Power supply:
(none) = 100... 240 VAC
12V
= 12 VDC not isolated
24V
= 24 VAC/DC.
4.1 - INTRODUCTION
When the instrument is powered, it initially works according to
the parameter values loaded in its memory. The instruments
behavior and its performance are governed by the value of the
stored parameters.
At the first start up the instrument will use a "default" parameter
set (factory parameter set); this set is a generic one (e.g. a TC J
input is programmed).
We recommend that you modify the parameters to suit your ap-
plication (e.g. set the right input type, Control strategy and
define an alarm, etc.). To change these parameters you will
need to enter the "Configuration procedure".
4.2 - INSTRUMENT BEHAVIOUR AT POWER UP
At power up the instrument can start in one of the following
modes depending on its configuration:
Auto mode
- The display will show the measured value;
- The instrument is performing the standard loop control.
Stand by mode (St.bY)
- The display will show alternately the measured value and
the message <<St.bY>> or <<od>>;
- The instrument does not perform any control (the control
outputs are OFF);
- The instrument is working as an indicator.
We define the above conditions as "Standard Display".
4.3 - FRONT PANEL DESCRIPTION
1 - Key
- Pressed for 5 s, it allows access to the parameters pro-
gramming mode.
- In the programming mode, it is used for the change of the
parameters and for the confirmation of the values.
- Still in the programming mode, it can be used together with
the
key to modify the level of access (operator level or
configuration level) of the selected parameter.
- During the normal functioning (not in programming phase),
pressed together with the
key for 5 s, it allows to lock
and unlock the keyboard.
- During the normal functioning (not in programming phase),
pressed together with the
key for 5 s, it allows the
reset or the acknowledgement of the alarms.
2 - Key
- In the programming mode, it is used for to decrease the values
to be programmed and for the selection of the parameters.
- During the normal functioning (not in programming phase),
quickly pressed, it allows to visualize and to modify the
value of the set point.
3 - Key
- In the programming mode, it is used to increase the values
to be programmed and for the selection of the parameters.
- Kept pressed for 3 s in the programming mode it can be
used to exit from it and come back to the normal functioning.
- Still in the programming mode, it can be used together with
the P key, to modify the level of access (operator level or
configuration level) of the selected parameter.
- Pressed together with the
key for 5 s, it unlocks the
keyboard, when previously locked.
- During the normal functioning (not in programming phase),
quickly pressed, it allows to visualize the output power.
4 - Key
- If programmed through par. "ub.F", pressed for 1 s in the
normal functioning mode, it allows the switch on/off (Stand-
by) or to perform one of the possible functions (to start a
cycle of Autotuning, etc.).
- During the normal functioning (not in programming phase),
pressed together with the
key for 5 s, it allows the reset
or the aknowledgement of the alarms.
5 - LED Set
- In the programming mode, it is used for indicating the level
of programming of parameters.
- If ub.F = Sb.o, when the instrument is in Stand-by mode, it
remains the only lit LED.
- In the normal functioning mode, it flashes when a key is
pressed to indicates the pressure has happend on the key.
6 - LED Out1
- It indicates the Out 1 condition ( compressor or tempera-
ture control device) activated (on), deactivated (off) or
inhibited (flashing).
7 - LED Out2
- It indicates the Out 2 condition.
8 - LED Tun
- It indicates the Autotuning is in progress.
4.4 - HOW TO ENTER THE CONFIGURATION
PARAMETERS
Press
key and keep it pressed.
Condition 1: the instrument will show "Ln" (lock ON).
The keyboard is locked.
Mantaining the pressure on the
key, also press the
key. The LED Set begins to flash.
Keep the pressure on the two.
Keep the pressure on the two keys until the display shows "LF"
(lock OFF).
Now release the keys. The keyboard is now unlocked.
Note: If no button is pressed for a time longer than the time
programmed with the Lo parameter, the key lock will be
automatically enabled.
Condition 2: The instrument displays no message.
In this situation we can have 2 different cases:
Case 1: The parameters protection (password) is not active.
Press
key and keep it pressed for around 5 seconds.
The display will show the code of the first configuration parameter.
With the
and
keys, select the parameter to be edited.
Case 2: The parameters protection (password) is active.
Press
key and keep it pressed for more than 5 seconds.
The display will show the code that identifies the first parameter
that has been moved into the Operator level.
Press
key. The display will visualize
"r.P".
Press P key again. The display will show "
0".
With the
and
keys, program the password and confirm
it pushing
key again.
Note: the factory default password is 0 (no password).
2.A) If the password is correct, the instrument will show the
code that identifies the first configuration parameter.
2.B) If the password is not correct, the instrument will show "r.P"
again.
a) Once entered into the configuration parameters, select the
parameter to be modified using the
and
keys.
b) Press
key. The instrument will alternatively visualize
the parameter's code and its value.
c) Modify the value of the parameter using the
and
keys.
d) Press
key to memorize the new value. The display will
return to visualize only the code of the selected parameter.
e) Working on
and
keys, it is therefore possible to
select another parameter and to modify it as described on
points a, b, c, d.
Note: The instrument will only show the parameters applicable
to its hardware options in accordance with the specific
instrument configuration (i.e.setting AL1t [Alarm 1 type]
equal to <<nonE>> [not used], all parameters related
with the alarm 1 will be skipped).
To go out from the programming mode do not work on any key
for around 30 s, or press
key for around 5 s.
4.5 - PARAMETERS PROTECTION THROUGH A PASSWORD
The instrument has a function that protects the parameters
through a password, programmable through parameter "PP."
If you wish to have this protection, you have to set parameter
"PP" to the number you'd like to be your password and then exit
from parameters programming.
When the protection is active, to be able to have access to the
parameters, press
key and keep it pressed for around 5 s.
Afterwards, the display will visualize "r.P" , push the
key
again and the display will visualize "0."
Now, through the
and
keys, set the number of your
password and press
key.
If the password is correct the display will visualize the code that
identifies the first parameter and it will be possible to program it
with the same procedure as described on the previous paragraph.
The protection through password is disabled setting par. "PP" = oF.
Note: If the password is forgotten, use password -18. This will
allow you access to the protected parameters and it will
be possible therefore to verify and also modify the
parameter "PP."
4.6 - CUSTOMIZED PARAMETERS PROGRAMMING
(levels of parameters programming)
The factory programming makes hides all the parameters
behind the password with exception of the set point 1.
If you wish to modify some parameters, maintaining the
protection on the others, after setting the Password through
parameter "PP", it is necessary to follow this procedure:
a) Enter the programming through the Password.
b) Select the parameter to be programmable without password.
c.1) The LED Set is flashing.
- the parameter is protected by the password.
c.2) The LED Set is lit but not flashing.
- The parameter is not protected by the password.
To modify the level of access of the parameter (in other words:
to have the parameter protected or not by the password) press
the
key and keeping it pressed press the
key.
The LED Set will change its state, pointing out the new level of
accessibility of the parameter (switched on = not protected;
flashing = protected by password).
If the Password is enabled and some parameters have been set
as "not protected", when entering the programming the
instrument will first display all the parameters set as "not
protected" and then, "r.P" parameter. By entering the password
here all other parameters can be viewed.
4.7 - FACTORY RESET
(default parameters loading procedure)
It is possible to restore the instruments factory configuration.
To load the factory default parameter settings, proceed as follows:
- Enter in configuration mode (see 4.4 paragraph).
- If no password is programmed, set PP different from OFF.
- Exit from configuration procedure.
- Press the
button for more than 7 seconds. The display
will show "rP".
- Release the
button and push it again. The display will
show "0".
- By means of keys
and
set the value
-48.
Once the password has been confirmed by pressing the
key, the display shows for approximatively 2 s "---", the
instruments then runs through the start up procedure resetting
all the parameters to the factory defaults.
4.8 - ON/STAND-BY FUNCTION
When supplied, the instrument can assume 2 different conditions:
- ON: means that the regulator activates the programmed
control functions.
- STAND-BY: means that the regulator does not activate any
control function and the control outputs are forced to zero
(the display results switched on or off according to the pro-
gramming done on parameter ub.F).
The instrument starts in the same way it was before the switch off.
The condition of ON/STAND-BY can be selected through the
key when pressed for 1 s.
The passage from the STAND-BY to the ON condition, does
not activate the Soft-start (or od) or the Autotuning and hides
the alarms.
When the instrument is in STAND-BY mode with the display on
the display alternates between the measure value and "St.b."
When the instrument is in STAND-BY with display off, the dis-
play is completely switched off except for the decimal point of
the LSD (LED Set (5)).
When the instrument is in STAND-BY mode (both the visualiza-
tions) it is however possible to enter the parameters programming.
4.9 - ALL CONFIGURATION PARAMETERS
In the following pages we will describe all the parameters of the
instrument. However, the instrument will only show the
parameters applicable to its hardware options in accordance
with the specific instrument configuration (i.e.setting o2F
[Alarm] equal to <<no>> [not used], all parameters related with
the alarm will be skipped).
[1] SPL: Minimum Set Point value
Range: from -99.9 to SPH engineering units.
[2] SPH: Maximum Set Point value
Range: from SPL to 999 engineering units.
[3] SP1: Set Point
Range: from SPL to SPH engineering units.
[4] SP2: Second Set Point
Note: When 2 control outputs are programmed with ON/OFF
action, the instrument uses SP1 to command OUT1 and
SP2 (see following parameter) to command OUT2.
Available: When Out 2 has been programmed as control output.
Range: from SPL to SPH engineering units.
[5] AL : Alarm threshold
Available: when Out 2 has been programmed as alarm.
Range: -99.9 to 999 engineering units.
1. OUTLINE DIMENSIONS (mm)
2. CONNECTION DIAGRAM
Vr. 1 (ENG) - code.: ISTR-FCN38SENGOG1
OMEGA Enineering, Inc.
One Omega Drive, P.O. Box 4047
Stamford, Connecticut 06907-0047
Phone: (800) 848-4286 or (203) 359-1660
Fax: (203) 359-7700
34
64
28
5.5
75
35
Type 1
panel gasket
Type 2
panel gasket
m
ax.
2
9 m
m
max. 12 mm
Out2
Out1 Tun
AL
CN38S
POWER
SUPPLY
+
1
3
2
4
C
11
INPUTS
P T C / N T C
8
6
5
OUT1
NO
7
12
OUT2
R38
Relays: 8A-AC1
(6A-AC3)/250 VAC
Pt100/PT1000
tc
N C
N O
C
10
+
-
+
-
N C
SSR: 10 VDC/20 mA
11
12
+
-
11
12
+
-
RTD
11
12
+
-
PTC/NTC/PT1000
3. TECHNICAL CHARACTERISTICS
4. CONFIGURATION PROCEDURE
4
C
6
5
NO
N C
+
-
4
6
5
1
C
3
2
NO
N C
+
-
1
3
2
7
8
Power
supply
CN38S -
-
Input
Out1
-
Out2
-
Power supply
5
1
2
3
4
Out2
Out1 Tun
AL
CN38S
Normal Mode
Password request
Insert correct
password
Increase
value
Decrease
value
Parameters
(Program mode)
CN38S
Microprocessor Based
Digital Electronic Controller
INSTRUCTION
SHEET
M5309/1114
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