Omega Products CN2132 Installation Manual

Installation and Operation Handbook Contents

MODEL CN2132 PID CONTROLLER

INSTALLATION AND OPERATION HANDBOOK

Contents Page

Safety and EMC Information.........................................................................................ii

Chapter 1 INSTALLATION....................................................................................1-1

Chapter 2 OPERATION ........................................................................................2-1

Chapter 3 ACCESS LEVELS................................................................................3-1

Chapter 4 TUNING................................................................................................4-1

Chapter 5 CONFIGURATION ...............................................................................5-1

Chapter 6 USER CALIBRATION..........................................................................6-1

CN2132 Controller Issue 1 November 1998 i

Safety Information Installation and Operation Handbook

SAFETY and EMC INFORMATION

Please read this section before installing the controller

This controller meets the requirements of the European Directives on Safety and EMC, however it is the responsibility of the installer to

ensure the safety and EMC compliance of any particular installation.

Safety

This controller complies with the European Low Voltage Directive 73/23/EEC, amended by 93/68/EEC, by the application of the safety standard EN 61010(93).

Electromagnetic compatibility

This controller conforms with the essential protection requirements of the EMC Directive 89/336/EEC, amended by 93/68/EEC, by the application of a technical construction file.

INSTALLATION REQUIREMENTS FOR EMC

To ensure compliance with the European EMC directive certain installation precautions are necessary as follows:

• When using the relay output it may be necessary to fit a filter

suitable for suppressing the emissions. The filter requirements will depend on the type of load.

ii CN2132 Controller

Routing of wires

To minimize the pick-up of electrical noise, the dc pulse wiring and the sensor input wiring should be routed away from high-current power cables. Where it is impractical to do this, use shielded cables with the shield grounded at both ends.

SERVICE AND REPAIR

This controller has no user serviceable parts. Contact Omega Engineering, Inc. for repair.

Installation and Operation Handbook Safety Information

TECHNICAL SPECIFICATION FOR SAFETY PURPOSES.

Equipment ratings

Supply voltage: 100 to 240Vac -15%, +10% Supply frequency: 48 to 62Hz ac. Power consumption: 2.5 Watts maximum Relay output: Maximum of 264Vac. Minimum 30Vac or dc. Maximum current, 2A resistive. Leakage current: The leakage current through the relay contact suppression components is less than 2mA at 264Vac, 50Hz. Over current protection: External over current protection devices are required that match the wiring of the installation. A minimum of 0.5mm

or 16awg wire is recommended. Use independent fuses for the instrument supply and the relay output. Suitable fuses are T type, (IEC 127 time-lag type) as follows; Instrument supply: 85 to 264Vac, 2A, (T). Relay output: 2A (T).

Environmental ratings

Panel sealing: Instruments are intended to be panel mounted. The rating of panel sealing is defined by EN 60529: IP 65. Operating temperature: 0 to 55oC. Ensure the enclosure provides adequate ventilation. Relative humidity: 5 to 90%, non-condensing. Atmosphere: The instrument is not suitable for use above 2000m or in explosive or corrosive atmospheres.

Electrical safety

Installation category II: Voltage transients on any mains power connected to the instrument must not exceed 2.5kV. Pollution degree 2: Conductive pollution must be excluded from the cabinet in which the instrument is mounted. Isolation: All inputs and outputs, have a reinforced isolation which provides protection against electric shock, except the dc pulse

output which is electrically connected to the main process variable input, (thermocouple etc.).

CN2132 Controller iii

Safety Information Installation and Operation Handbook

INSTALLATION SAFETY REQUIREMENTS

Personnel

Installation must only be carried out by qualified personnel.

Enclosure of live parts

To prevent hands or metal tools touching parts that may be electrically live, the controller must be installed in an enclosure.

Wiring

It is important to connect the controller in accordance with the wiring data given in this handbook. Take particular care not to connect AC supplies to the low voltage sensor input or the dc pulse output. Wiring installations must comply with all local wiring regulations.

Isolation

The installation must include a power isolating switch or circuit breaker. This device should be in close proximity to the controller, within easy reach of the operator and marked as the disconnecting device for the instrument.

Overcurrent protection

To protect the internal PCB tracking within the controller against excess currents, the AC power supply to the controller and relay output must be wired through the fuse or circuit breaker specified in the technical specification.

Voltage rating

The maximum continuous voltage applied between any of the following terminals must not exceed 264Vac:

• power supply to relay, dc pulse or sensor connections;

• relay output to logic or sensor connections;

The controller should not be wired to a three phase supply with an unearthed star connection. Under fault conditions such a supply could rise above 264Vac with respect to ground and the product would not be safe.

Voltage transients across the power supply connections, and between the power supply and ground, must not exceed 2.5kV. Where occasional voltage transients over 2.5kV are expected or measured, the power installation to both the instrument supply and load circuits should include a transient limiting device. These units will typically include gas discharge tubes and metal oxide varistors that limit and control voltage transients on the supply line due to lightning strikes or inductive load switching. Devices are available in a range of energy ratings and should be selected to suit conditions at the installation.

iv CN2132 Controller

Installation and Operation Handbook Safety Information

Conductive pollution

Conductive pollution must be excluded from the cabinet in which the instrument is mounted. For example, carbon dust is a conducting pollution. To secure a suitable atmosphere in conditions of conductive pollution, fit an air filter to the air intake of the cabinet. Where condensation is likely, for example in low temperatures, include a thermostatically controlled heater in the cabinet.

Grounding

The dc pulse output is not isolated from the sensor input. Because of this, two possible conditions need to be considered:

• The temperature sensor may be connected to the electrical

heating element and hence be at the heater supply voltage. The controller is designed to operate under these conditions but the logic output will also be at the heater potential. You must ensure that this will not damage the power control device that is connected to the dc pulse output and that someone servicing the equipment does not touch the sensor connections or the dc pulse output while they are live.

• In some installations it is a requirement to replace the

temperature sensor while the controller is still powered up. Under these conditions, we recommend that the shield of the temperature detector is grounded. Do not rely on grounding through the framework of the machine.

Electrostatic discharge precautions

When the controller is removed from its sleeve, some of the exposed electronic components are vulnerable to damage by electrostatic discharge from someone handling the controller. To avoid this, when handling the unplugged controller you should discharge yourself to ground through a wrist strap with a 1MΩ series resistor.

Over-temperature protection

When designing any control system it is essential to consider what will happen if any part of the system should fail. In temperature control applications the primary danger is that the heating will remain constantly on. Apart from spoiling the product, this could damage any process machinery being controlled or even cause a fire.

Reasons why the heating might remain constantly on include:

• the temperature sensor becoming detached from the process;

• the controller failing with its heating output constantly on;

• an external valve or contactor sticking in the heating condition;

• the controller setpoint set too high.

Where damage or injury is possible, we recommend fitting a separate over-temperature protection unit, with an independent temperature sensor, which will isolate the heating circuit. Please note that using the relay within the controller as an alarm output will not give protection under all failure conditions.

CN2132 Controller v

Installation and Operation Handbook Installation

Chapter 1 INSTALLATION

The CN2132 controller is a compact 1/32 DIN (48x24mm) PID or On/Off temperature controller with automatic tuning. It has a single input, which is configurable on-site for either thermocouple, resistance thermometer, linear millivolts, or linear milliamps. It has two outputs: a relay output and a dc pulse output for operating a solid state relay, either of which is configurable for heating, cooling, or alarms.

This chapter consists of two parts:

• MECHANICAL INSTALLATION

• ELECTRICAL INSTALLATION.

Before proceeding please read Safety and EMC Information.

WARNING

You must ensure that the controller is correctly configured for your application. Incorrect configuration could result in damage to the process being controlled and/or personal injury. It is your responsibility as the installer to ensure that the configuration is correct. The controller may either have been configured when ordered, or may now need configuring. See Chapter 5, Configuration.

Upper panel retaining clip

Display screen

Latching ears

Ratchets

Panel sealing gasket

Figure 1-1 CN2132 1/32 DIN controller

Terminal covers

Label

Sleeve

Lower panel retaining clip

CN2132 Controller 1-1

Installation Installation and Operation Handbook

MECHANICAL INSTALLATION

48mm (1.89in)

24mm

CN2132

(0.95in)

Figure 1-2 Outline dimensions

Panel cut-out and recommended minimum spacing of controllers

22.2mm X 45mm

-0.0 +0.3 –0.0 +0.6

-0.0 +0.1

0.88in

–0.0 +0.2

X 1.78in

10mm (0.2in)

103mm (4.06in)

Unplugging and plugging-in the controller

The electronic assembly of the controller plugs into a rigid plastic sleeve, which in turn fits into the standard DIN size panel cut-out shown in Figure 1-3. The controller can be unplugged from it’s sleeve by easing the latching ears outwards and pulling it forward out of the sleeve. When plugging the controller back into it’s sleeve, ensure that the latching ears click into place in order to secure the IP65 sealing.

To install the controller

1. Prepare the control panel cut-out to the size shown in Figure 1-3.

2. Insert the controller through the panel cut-out.

3. Spring the upper and lower retaining clips in place. Secure the

controller in position by holding it level and pushing both retaining clips forward.

Note: If you subsequently need to remove the controller sleeve from the control panel, unhook the retaining clips from the side with either your fingers or a screwdriver.

Figure 1-3 Panel cut-outs and minimum spacing

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Installation and Operation Handbook Installation

Line

9Vdc @18mA

ELECTRICAL INSTALLATION

All electrical connections are made to the screw terminals at the rear of the controller. Use crimp connectors that accept wire sizes from

0.5 to 1.5 mm

(16 to 22 awg).

Milliamp Inputs

If a milliamp input has been ordered a 2.5Ω sense resistor will be supplied which must be wired across terminals V- and V+

Snubber

When switching inductive loads such as contactors and solenoid valves, the 15nF/100Ω ‘snubber’ provided with the controller should be wired across the relay terminals AA and AB to prolong contact life and suppress interference.

WARNING

When the relay contact is open, the snubber circuit passes 0.6mA at 110vac and 1.2mA at 240vac. You must ensure that this current, passing through the snubber, will not hold in low power electrical loads. It is your responsibility as the installer to ensure that this does not happen.

Electrical connections

SSC-TE10S Solid state relay

Heating load

1B 1A

dc pulse output

Input

V- V+ AB AA N L

Thermocouple

RTD/PT100

Heating, cooling, or alarm contactor

Relay 2A, 264Vac

Unused

85 - 264Vac 50 - 60 Hz

Snubber

Heater Fuse

2A Fuse

Neutral

CN2132 Controller 1-3

Installation and Operation Handbook Operation

Output 2 on

Chapter 2 OPERATION

This chapter has six main topics:

• FRONT PANEL LAYOUT

• POWER ON

• PARAMETERS AND HOW TO ACCESS THEM

• PARAMETER NAVIGATION DIAGRAM

• OPERATOR PARAMETER TABLES

• TIMER FUNCTION

• ALARMS.

FRONT PANEL LAYOUT

Readout

Indicator

or button

OP1 Output 1 When lit, this indicates that the dc

OP2 Output 2 When lit, this indicates that the

Name Function

pulse output is on.

relay output is on.

Page

button

Scroll

button

Press to select a new list of parameters.

Press to select a new parameter in a list.

CN2132

Output 1 on

OP1 OP2

25.0

Page

button

Figure 2-1 Front panel layout

CN2132 Controller 2-1

Scroll

button

Down

button

Down

button

Figure 2-2 Indicators and buttons

Press and release to view the setpoint or a selected parameter. Keep pressed to decrease the value.

Press and release to view the setpoint or a selected parameter. Keep pressed to increase the value

Operation Installation and Operation Handbook

POWER ON

Switch on the power to the controller. It runs through a self-test sequence for about three seconds and then displays the measured value. This is called the Home display. It is the one you will use most often. From this display you can view and adjust the setpoint as shown below:

The Home display

The measured value is displayed.

Power on

OP1

25.025.0

OPOP

OP2

OP1 OP2

OP1

100.0100.0

OP2

x 2

OP1 OP2

^C^C

OP1

20.020.0

OP2

To view the setpoint, press and release either or . To change the setpoint, keep pressing. Two seconds after releasing the button, the new value will be accepted and the display will revert to showing the measured value.

Press the Scroll button once.

Display units

The display units will be shown for 0.5 seconds after which the display will revert to the Home display.

From the Home Display press the Scroll button twice.

Output power

To view the % output power, press and release or

This is a read-only value. You cannot change it.

Press and together to return to the Home display.

Other parameters

Pressing the Scroll button from the Output Power display may access further parameters. If setpoint rate limit is enabled then the ‘w. SP’ display will enable the working setpoint to be accessed. Other parameters may be in the scroll list if the ‘promote’ feature has been used (see Edit Level, Chapter 3).

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Installation and Operation Handbook Operation

PARAMETERS AND HOW TO ACCESS THEM

Parameters are settings within the controller that determine how the controller will operate. For example, alarm setpoints are parameters that set the points at which alarms will occur. For ease of access, the parameters are arranged in lists, as shown in the navigation diagram (Figure 2-3). In each list the first item to be displayed is the name of the list, called the list header. The lists are:

Home list Alarm list Autotune list

PID list Setpoint list Input list

To step through the list headers press the Page button . You will eventually return to the Home display. To step through the parameters within a particular list,

press the Scroll button . When you reach the end of a parameter list you will return to the list

header. From within a list you can return to the list header at any time by pressing the Page button.

To step to the next list header press the Page button once again.

Returning to the Home display

You can get back to the Home display at any time by pressing and together.

Alternatively, you always get the Home display either if no button is pressed for 45 seconds or when the power is first turned on.

Output list On/Off list Access list.

Parameter names

In the navigation diagram (Figure 2-3) each box depicts the display for a selected list header or parameter within a list. The Operator parameter tables later in this chapter list all the parameter names and their meaning.

The navigation diagram shows all the parameters that potentially can be present in the controller. In practice, only those associated with a particular configuration will appear. For example, if no alarms are configured no alarm parameters will be present and the alarm list will not appear.

The shaded boxes in the diagram indicate parameters that are hidden in normal operation. To see all the available parameters, you must select Full access level. For more information about this, see Chapter 3, Access Levels.

To change the value of a parameter

First, select the required parameter. The parameter name will be displayed.

To view the parameter value, press and release either or

To change the parameter value, press either

In this adjustment, pressing once changes the value by one digit. Keeping the button pressed speeds up the rate of change. Two seconds after releasing either button, the readout blinks to show that the controller has accepted the new value.

CN2132 Controller 2-3

Operation Installation and Operation Handbook

List

(1)

(2)

(1)

List

(3)

(4)

PARAMETER NAVIGATION DIAGRAM

Home

List

20.0

Alarm

List

Autotune

Atun

PID

List

PID

Setpoint

Input

List

Output

List

On-Off

List

on.OF

Access

List

ACCS

ºC/F/k

w.SP

m - A ConF

???

1FSH

2FSL

3dEv

Lb t

tunE

AdC

rES

Lcb

Hcb

rEL.C

SP L

SP H

SPrr CYC.H

dwell

FiLt

CAL

CAL.L

AdJ.L

CAL.H

Adj.H

CJC

Figure 2-3 Operator parameters navigation diagram

OP.Lo

OP.Hi

CYC.C

ont.H

ont.C

hYS.H

hYS.C

HC.db

Notes:

1. Either the PID list or the On/Off list will be present. This is dependent upon the control type in use.

2. The last three characters depend upon the type of alarm configured.

3. If setpoint rate limit is active ‘w.SP’ will be displayed.

4. Other parameters may appear if the ‘promote’ feature has been used (see Edit Level, Chapter 3).

The shaded boxes are normally hidden in Operator level

codE

Goto

Home

List

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