Omega Thermostat CN3440 User Manual

Users Guide  
®
omega.com  
®
CN3440 SERIES  
Universal Temperature & Process  
Controllers  
Installation Guide  
 
CONTENTS  
1
2
INTRODUCTION .................................. 2  
PREPARATION .................................... 3  
2.1 Checking the Code Number......... 3  
3
4
MECHANICAL INSTALLATION .......... 4  
3.1 Siting .......................................... 4  
3.2 Mounting ...................................... 5  
ELECTRICAL INSTALLATION ............ 6  
4.1 Access to Terminals..................... 6  
4.2 Setting the Input Selector Links ... 6  
4.3 Setting the Isolated Output Link ... 6  
4.4 Cable Glands and  
Conduit Fixings ............................ 8  
4.4.1 Cable Glands  
(IEC – 20mm) ................... 8  
4.4.2 Conduit Adaptors  
(N. American – 0.5in)........ 8  
4.4.3 Cable Glands  
(N. American – 0.5in)........ 9  
4.5 Connections Summary............... 10  
4.6 Input Connections ...................... 12  
4.6.1 Thermocouple  
(THC) Inputs ................... 12  
4.6.2 3-lead Resistance  
Thermometer (RTD)  
Inputs .............................. 12  
4.6.3 2-lead Resistance  
Thermometer (RTD)  
Inputs .............................. 12  
4.6.4 Links for Unused Inputs .. 12  
4.7 Output Connections ................... 14  
4.8 Relay Connections ..................... 14  
4.9 Motorized Valve Connections .... 14  
4.10 Logic Input Connections ............ 15  
4.11 Power Supply Selection and  
AC Connections ......................... 16  
5
INSTALLATION RECORD ................. 17  
1
 
1
INTRODUCTION  
The instrument documentation is shown in Fig. 1.1. The Standard Manuals, including the  
specification sheet, are supplied with all instruments. The Modbus Supplement is supplied with  
instruments configured for Modbus Serial Communication.  
This manual includes an Installation Record which should be completed as a log of the electrical  
installation. The record is useful when carrying out initial instrument programming and can be  
retained for future reference.  
INSTALLATION  
Product Identification  
Siting  
Mounting  
Electrical Connections  
Installation Record  
OPERATION  
PROGRAMMING  
MODBUS (RTU).  
Setting Up  
Basic Config. Level  
Serial Adaptors  
Displays & Controls  
Operating Level  
Simple Fault-Finding  
Advanced Config. Level  
Serial Connections  
Programming Page  
MODBUS Registers  
Standard Manuals  
Fig. 1.1 Documentation  
MODBUS Supplement  
2
 
2
PREPARATION  
2.1 Checking the Code Number – Fig. 2.1  
XXXX / X X X X X X X X  
Code Number Label  
Fig. 2.1 Location of Code Number Label  
3
 
3
MECHANICAL INSTALLATION  
EC Directive 89/336/EEC  
55°C  
In order to meet the requirements of the  
EC Directive 89/336/EEC for EMC  
regulations, this product must not be used  
in a non-industrial environment.  
Max.  
0°C  
Min.  
A – Within Temperature Limits  
0 to 90% RH  
3.1 Siting – Figs. 3.1 and 3.2  
Minimum  
Sensor  
A – Close to Sensor  
B – Within Humidity Limits  
IP66/  
NEMA4X  
C – Within Protection Rating Limits  
B – At Eye-level Location  
+
C – Avoid Vibration  
Caution. Select a location  
away from strong electrical and  
magnetic fields. If these cannot be  
avoided, particularly in applications  
where ‘walkie talkies’ are used,  
connect using screened cables  
within earthed metal conduit.  
Fig. 3.1 General Requirements  
D – Use Screened Cables  
Fig. 3.2 Environmental Requirements  
4
 
3
MECHANICAL INSTALLATION…  
3.2 Mounting – Figs. 3.3 and 3.4  
The instrument is designed for wall-/pipe-mounting – see Fig. 3.4. Overall dimensions are  
shown in Fig. 3.3.  
Dimensions in inches (mm)  
1.65  
2.68 (68)  
(42)  
6.3 (160)  
8.43  
(214)  
9.13  
(232)  
9.84  
(250)  
Allowance for  
Cable Bends  
2.72 (69)  
7.9 (200)  
23/8 (61) O.D. Vertical or  
Horizontal Post  
Fixing Centres  
Fixing Holes  
(x3) 0.25 (6.5) Dia  
Fig. 3.3 Overall Dimensions  
Drill suitable  
holes  
2
1
Position ‘U’ bolts on pipe  
2
Position plates over ‘U’ bolts  
Pipe Mounting Kit  
1
Mark fixing  
centres  
(see Fig. 3.3)  
Secure plates  
3
3
Fix instrument to  
wall using  
suitable fixing  
4
Secure transmitter to mounting plate  
Fig. 3.4 Wall-/Pipe-mounting Details  
5
 
4
ELECTRICAL INSTALLATION  
4.2 Setting  
the  
Input  
Warning. Before making any  
connections, ensure that the power  
supply, any high voltage-operated control  
circuits and high common mode voltages  
are switched off.  
Selector Links – Fig. 4.2A  
Plug-in links on the microprocessor p.c.b. are  
positioned according to the type of Process  
Variable Input, Remote Set Point Input and  
Valve Position Feedback Inputs used.  
Note.  
Remove the instrument front panel – see  
Fig. 4.1, steps 1 to 6.  
Always route signal leads and power  
cables separately, preferably in  
earthed metal conduit.  
Referring to Fig. 4.2A, set the link positions  
for the input type required.  
It is strongly recommended that  
screened cable is used for signal  
inputs and relay connections. Connect  
the screen to the ground stud.  
4.3 Setting  
the  
Isolated  
Output Link – Fig. 4.2B  
A plug-in link (PL7) on the microprocessor  
p.c.b. is positioned according to the isolated  
Information. Use cable appropriate  
for the load currents. The terminals accept  
cables up 12AWG (2.5mm2).  
output  
required,  
either  
a
current  
proportioning control output (programmable  
in range 0 to 20mA) or a 12V logic output  
(minimum load 400). Referring to Fig. 4.2B  
– steps 1 and 2, set the link for the output  
type required.  
4.1 Access to Terminals – Fig. 4.1  
For access to terminals – refer to Fig. 4.1,  
steps 1 to 3.  
To use a 12V logic output, the control type  
must be set to Time Proportioning Control –  
see Fig. 3.1 of the Programming Guide.  
Remove cap  
and screw  
5
Remove front  
panel  
6
1 slide  
down  
2Pull out  
4 Remove front  
slightly…  
panel screws  
2
3 Slacken captive screws and  
and  
slide off  
remove protection cover  
Fig. 4.1 Access to Terminals and Processor Board  
6
 
4
ELECTRICAL INSTALLATION…  
Identify Link PL7  
1
Set links for output type required  
2
PL7  
PL7  
1
1
Logic Output  
or  
Analog Output  
B – Isolated Output Types  
PL1  
PL2  
PL3  
Position  
Feedback  
Input  
Process  
Variable  
Input  
Remote  
Set Point  
Input  
mA  
R, mV,  
THC & RTD  
V
2-wire  
Transmitter  
Input  
A – Input Types  
Fig. 4.2 Setting the Selector Links  
7
 
…4 ELECTRICAL INSTALLATION  
4.4 Cable  
and Conduit Fixings  
Glands  
4.4.2 Conduit  
Adaptors  
(N. American – 0.5in) – Fig. 4.4  
4.4.1 Cable  
(IEC – 20mm) – Fig. 4.3  
Glands  
Warning.  
Rigid conduit must NOT be fitted to the  
controller.  
Controller adaptors must incorporate  
a face seal.  
Torque settings for the hubs and outer  
nuts on the specified adaptors is 20ft.  
lbs minimum, 25ft. lbs. maximum.  
Information.  
Suitable adaptors for controller  
(mandatory for FM installations):  
APPLETON  
'O'-Ring  
ST-50 PLUS STG-50 or STB-50  
PLUS STG-50.  
Reusable ONLY with replacement  
ferrule STF-50.  
O.Z. GEDNEY  
4Q-50, 4Q50T or 4Q-50TG.  
Alternative  
Face Seal  
Fig. 4.3 Cable Gland  
(Supplied as standard)  
Face  
Seal  
Hub  
Seal  
(Present  
in O.Z.  
Gedney  
Fittings)  
Ferrule  
Outer Nut  
Fig. 4.4 Conduit Adaptors  
8
 
4
ELECTRICAL INSTALLATION…  
4.4.3 Cable  
Glands  
(N. American – 0.5in) – Fig. 4.5  
Warning.  
Controller glands must be fitted with a  
face seal.  
Torque settings (hubs only) 20ft. lbs  
minimum, 25ft. lbs. maximum.  
Outer nuts hand tight plus a half turn  
only.  
Alternative  
Face Seal  
Information.  
Suitable Cable Glands: (mandatory for  
FM installations):  
Face  
Seal  
O.Z. GEDNEY  
Hub  
SR-50-375 or SR-504  
APPLETON  
CG 3150 or CG-3150S (and STG-  
50 sealing ring).  
THOMAS & BETTS  
2521.  
When fitting cable glands to the  
controller, start with an outer gland  
and also temporarily fit a gland at the  
opposite end, to aid location of the  
transmitter gland plate. Fit and tighten  
glands consecutively from initial  
gland.  
Fittings  
vary  
slightly  
for  
different  
makes  
Illustration  
typical for  
O.Z.Gedney  
Outer Nut  
Fig. 4.5 Cable Glands  
9
 
…4 ELECTRICAL INSTALLATION  
4.5 Connections Summary – Fig. 4.6  
Information.  
Input impedances:  
Low voltage(mV) >10MΩ  
Voltage >10MΩ  
Current 10.  
Process Variable Input  
Remote Set Point Input  
Relay 1  
Relay 2  
Relay 3  
9 10 11  
Power  
Supply  
4
3
5
6
7
8
12 13 14 15 16 17  
27 28 29 30 31 32  
1
2
18 19 20 21 22 23 24 25 26  
MODBUS (RTU)  
(if option fitted)  
Logic Input  
Control Output  
Position Feedback Input  
Retransmission Output  
Fig. 4.6 Terminal Block Identification  
10  
 
4
ELECTRICAL INSTALLATION…  
Terminal Number  
AC Supply  
1
2
L
N
24V, 115V or 230V a.c.  
see Fig. 4.22  
3
4
5
N/O  
C
N/C  
Relay 1 Output  
see Fig. 4.17  
Motorized Valve Control Relay (open)  
see Fig. 4.19A  
6
7
8
N/O  
C
N/C  
Relay 2 Output  
see Fig. 4.17  
Motorized Valve Control Relay (close)  
see Fig. 4.19A  
9
10  
11  
N/O  
C
N/C  
Relay 3 Output  
see Fig. 4.17  
Alarm Relays  
3rd lead/2-wire TX  
Input 1+  
Input 1–  
12  
13  
14  
Process Variable Input or 2-wire Tx Power Supply  
see Figs. 4.7 to 4.9,  
see Fig. 4.13  
4.12 and 4.14  
3rd lead  
Input 2+  
Input 2–  
15  
16  
17  
Remote Set Point Input see Figs. 4.7 to 4.12 and 4.14  
18  
19  
20  
21  
22  
Tx+  
Tx–  
Common  
Rx+  
Rx–  
RS 485 Modbus Serial Communications Option 1 only see  
Modbus (RTU) Communications Supplement  
23  
24  
+
Retransmission Output/Cool Output see Fig. 4.15  
Current Proportioning Control Output/Heat Output Fig. 4.15  
or 12V Logic Control Output Fig. 4.16  
25  
26  
+
27  
28  
29  
3rd lead  
Input 3+  
Input 3–  
Position Feedback Input see Figs. 4.18 , 4.19A and 4.19B  
30  
31  
32  
Logic Input 1 see Figs. 4.20 and 4.21  
Logic Input 2 see Figs. 4.20 and 4.21  
Common  
Table 4.1 Electrical Connections  
11  
 
…4 ELECTRICAL INSTALLATION  
4.6 Input Connections  
Make connections to each input, as shown in Figs 4.4 to 4.14, first removing any factory-fitted  
wire links not required.  
4.6.1 Thermocouple (THC) Inputs – Fig. 4.7  
Note. Automatic Cold Junction Compensation (ACJC) is active when an input is  
programmed for use with thermocouples. Use the correct compensating cable between the  
THC and the terminals see Table 4.2.  
If an external fixed cold junction is used, the connections to the instrument must be made  
with copper cable. The input must be programmed for mV input signals and the appropriate  
THC linearizer selected see Sections 4.5 and 4.6 of the Programming Guide.  
Compensating Cable  
Type of  
ANSI  
DIN  
BS4937  
Part No.30  
+ Green  
White  
Case Green *  
+ Pink  
White  
Case Pink *  
+ Orange  
White  
Case Orange *  
Thermocouple  
Ni-Cr/Ni-Al (K)  
Nicrisil/Nisil ( N)  
Pt/Pt-Rh (R and S)  
Cu/Cu-Ni (T)  
BS1843  
MC 96.1  
+ Yellow  
Red  
Case Yellow  
+ Orange  
Red  
Case Orange  
+ Black  
Red  
Case Green  
+ Blue  
Red  
43714  
+ Red  
Green  
+ Brown  
Blue  
Case Red  
+ Orange  
Blue  
Case Orange  
+ White  
Blue  
Case Green  
+ White  
Blue  
Case Green  
+ Red  
White  
Case White  
+ Red  
Brown  
+ Brown  
White  
Case Blue  
Case Blue  
Case Brown  
Case Brown *  
+ Yellow  
Blue  
Case Black  
+ White  
Red  
Case Black  
+ Red  
Blue  
Case Blue  
+ Black  
White  
Case Black *  
Fe/Con (J)  
* Case Blue for intrinsically safe circuits  
DIN 43710  
+ Blue/red  
Blue  
Fe/Con (DIN 43710)  
Case Blue  
Table 4.2 Thermocouple Compensating Cables  
4.6.2 3-lead Resistance Thermometer (RTD) Inputs – Fig. 4.8  
The three leads must have equal resistance, not exceeding 50each.  
4.6.3 2-lead Resistance Thermometer (RTD) Inputs – Fig. 4.9  
If long leads are necessary it is preferable to use a 3-lead RTD. If the RTD is to be used in a  
hazardous area a 3-lead RTD must be used.  
4.6.4 Links for Unused Inputs  
To reduce susceptibility to electro-magnetic interference, ensure that the three terminals on  
each unused input are shorted together with sleeved wire links.  
12  
 
4
ELECTRICAL INSTALLATION…  
Remote Set Point  
Process Variable  
% ^  
@ £  
Remote Set Point  
Process Variable  
&
$
%
@
^ &  
£ $  
Sleeved  
Link  
Sleeved  
Link  
+
Fig. 4.12 Current Input Connections  
Fig. 4.7 Thermocouple Input Connections  
@ £  
$
Remote Set Point  
Process Variable  
% ^ &  
@ £  
$
Tx  
Fig. 4.13 2-wire Transmitter  
Power Supply Input Connections  
Red  
Red  
White  
Fig. 4.8 3-lead Resistance  
Thermometer Input Connections  
Remote Set Point  
Process Variable  
% ^  
@ £  
&
$
Remote Set Point  
% ^ &  
@ £ $  
Process Variable  
Sleeved  
Link  
Sleeved  
Link  
Fig. 4.14 Voltage Input Connections  
Red  
White  
Fig. 4.9 2-lead Resistance  
Thermometer Input Connections  
Retransmission O/P  
or 'Cool' Analogue O/P  
in Heat/Cool  
23 24  
25 26  
Remote Set Point  
% ^  
&
Current Proportioning  
Control Output  
Fig. 4.15 Current Proportioning Control  
and Retransmission Output Connections  
Fig. 4.10 3-lead Resistance  
Remote Set Point Input Connections  
25 26  
% ^  
Remote Set Point  
&
12V Logic Output for ON/OFF  
or Time-proportioning Control  
Sleeved Link  
Fig. 4.11 2-lead Resistance  
Remote Set Point Input Connections  
Fig. 4.16 Logic Control Output Connections  
13  
 
4 ELECTRICAL INSTALLATION  
4.7 Output Connections  
Make connections as shown in Figs 4.15 and  
4.16.  
3
5
7
4
6
8
4.8 Relay Connections Fig. 4.17  
For relay functions refer to the following  
table.  
Motorized  
100% 0%  
Valve Drive  
Valve  
Positioner  
Power  
Relay 1  
Relay 2  
Relay 3  
On/Off Control  
Time Prop.(Heat)  
Time Prop.(Cool)  
Motorized Valve  
Alarm  
Supply  
100%  
0%  
Open  
Close  
(N)  
(L)  
L
N
Link  
Relay 3  
Relay 2  
Relay 1  
9 0  
6 7  
3 4  
!
8
5
27 28 29  
A Standard Feedback Slidewire  
Configuration  
27 28 29  
Normally Open  
Common  
Normally Closed  
Link  
Fig. 4.17 Relay Connections  
100%  
0%  
4.9 Motorized  
Valve  
Motorized Valve Drive  
Connections Figs. 4.18 and 4.19  
B Alternative Feedback Slidewire  
27 28 29  
Configuration  
Note. Link must be connected  
at the motorized valve drive  
terminals and not the Controller  
terminals.  
Sleeved Link  
Motorized Valve  
Drive  
Fig. 4.18 Motorized Valve Feedback  
Connections (using V, I or mV feedback)  
Fig. 4.19 Motorized Valve Connections  
(using feedback slidewire)  
14  
 
4
ELECTRICAL INSTALLATION…  
4.10 Logic Input Connections Figs. 4.20 and 4.21  
Each logic input can be programmed to perform one of a number of functions see Section  
3.10 of the Programming Guide.  
Auto/  
Manual  
Local/Remote Dual Set Point  
Alarm  
Set Point  
Selection  
Selection  
Acknowledgement  
Selection  
* Alarm  
Acknowledge  
Fixed Dual  
Set Point 2  
Automatic  
Manual  
Local  
5V  
Logic switching  
0V  
* Leading 'edge-triggered'  
(minimum duration 200ms)  
Fixed Dual  
Set Point 1  
Remote  
or Dual  
30 31 32  
Automatic Local  
Manual  
Fixed Dual Set Point 2  
Fixed Dual Set Point 1  
Alarm Ack.  
Remote (Dual)  
Note. Only one function may be  
performed by each input at any one time.  
30  
31  
32  
Logic Input 1  
Logic Input 2  
Common  
Fig. 4.20 Standard Logic Input Functions  
Hold  
(Soak)  
* Profile  
Reset  
* Skip  
Segment  
5V  
Logic switching  
0V  
* Leading 'edge-triggered'  
(minimum duration 200ms)  
Start  
Profile  
30 31 32  
P–Strt  
P–rSEt  
P–SKIP  
Hold/ (Soak)  
Start Profile  
Profile Reset Skip Current Segment  
30 Logic Input 1  
Note. Only one function may be  
performed by each input at any one time.  
31  
32  
Logic Input 2  
Common  
Fig. 4.21 Additional Logic Input Functions for Profile Selection  
15  
 
4 ELECTRICAL INSTALLATION  
4.11 Power Supply Selection and AC Connections Fig. 4.22  
115V  
115  
1
Digit 7  
Code Label  
C31 x x xx x x x x x  
2
230  
3
Selector not Fitted (24V AC)  
230V  
A Selecting the Supply Voltage  
115  
Information.  
Fuse Rating - 5A Type T  
Neutral  
Line  
Fuse  
Remove plug to  
make connection  
Ground  
B Power Supply Connections  
Fig. 4.22 Power Supply Selection and AC Connections  
16  
 
4
ELECTRICAL INSTALLATION…  
Connection/Terminal Number  
Power Supply (Tick Box)  
L
1
230V AC  
115V AC  
24V AC  
Power Supply  
N
2
NO  
C
3
Output Type:  
Relay 1 Output  
4
Output Function:  
NC  
NO  
C
5
6
Output Type:  
7
Relay 2 Output  
Relay 3 Output  
Output Function:  
NC  
NO  
C
8
9
Output Type:  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
Output Function:  
NC  
3rd  
+
(Tick Box)  
Link Positions  
Process Variable  
Input  
mA mV/THC/RTD  
mA mV/THC/RTD  
V
2-wire Tx  
Link Positions (Tick Box)  
3rd  
+
Remote Set Point  
Input  
V
Tx+  
Tx–  
Common  
Rx+  
Rx–  
+
Termination Resistors(Tick Box)  
Modbus Serial  
Communications  
Option 1 only  
Linked-out  
Linked-in  
Output Type:  
Retransmission  
Output  
Output Function:  
17  
 
4 ELECTRICAL INSTALLATION  
Connection/Terminal Number  
Link Positions (Tick Box)  
+
25  
26  
27  
28  
29  
30  
31  
32  
Control Output  
Analog Output Logic Output  
Link Positions (Tick Box)  
3rd  
+
Position Feedback  
Input  
mA  
mV  
V
R
Logic Input 1  
Logic Input 2  
Common  
18  
 
NOTES  
19  
 
NOTES  
20  
 
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no liability for any errors it contains, and reserves the right to alter specifications without notice.  
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Calibrators & Ice Point References  
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Infrared Pyrometers  
PRESSURE, STRAIN AND FORCE  
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Load Cells & Pressure Gauges  
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Instrumentation & Accessories  
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Rotameters, Gas Mass Flowmeters & Flow Computers  
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Turbine/Paddlewheel Systems  
Totalizers & Batch Controllers  
pH/CONDUCTIVITY  
pH Electrodes, Testers & Accessories  
Benchtop/Laboratory Meters  
Controllers, Calibrators, Simulators & Pumps  
Industrial pH & Conductivity Equipment  
DATA ACQUISITION  
Data Acquisition & Engineering Software  
Communications-Based Acquisition Systems  
Plug-in Cards for Apple, IBM & Compatibles  
Datalogging Systems  
Recorders, Printers & Plotters  
HEATERS  
Heating Cable  
Cartridge & Strip Heaters  
Immersion & Band Heaters  
Flexible Heaters  
Laboratory Heaters  
ENVIRONMENTAL  
MONITORING AND CONTROL  
Metering & Control Instrumentation  
Refractometers  
Pumps & Tubing  
Air, Soil & Water Monitors  
Industrial Water & Wastewater Treatment  
pH, Conductivity & Dissolved Oxygen Instruments  
M2954/0702  
 

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