Eurotherm 902 Series Manual de usuario

Contents

Guide to this Handbook

Section 1

Section 2

Section 3

Section 4

Section 5

Section 6

Section 7

Appendix

INSTALLATION

OPERATION

COMMISSION

CONFIGURE

CALIBRATION

COMMUNICATIONS

ERROR MESSAGES

Glossary of Terms

Every effort has been taken to ensure the accuracy of this handbook. However in order to

maintain our technological lead we are continuously improving our products which could, without

notice, result in amendments or omissions to this document. We cannot accept responsibility for

damage, injury loss or expenses resulting therefrom.

902-904 Handbook HA023752 Iss 9

This is the guide for using this Handbook.

Follow the directions below to obtain maximum benefit from this information provided.

installation

Follow the instructions in this section for successful mechanical mounting and correct

electrical connections.

Important notes on the application and operation of

all

temperature controllers are in

this section. Please read carefully before proceding.

Operation

This section contains the instructions which are normally needed in day to day operation

of your 902, 3 or 4 instrument. It is recommended that the procedures in this section

are understood before continuing to further sections,

Commission

This section contains instructions for correct matching of your instrument to the load

being controlled. Described are the procedures needed to be followed when first

installing the instrument and subsequently when carrying out any changes to the

control loop.

Configure

Your 902, 3 or 4 instrument has been pre-configured to your requirements according to

the order code. e.g. Range, Alarm types, etc. If there is a need to modify the basic

operation of your instrument, use this section and then return to section 3

(Commission), or section 2 (Operation).

Calibration

Your controller has been factory calibrated to a very high standard. However you may

wish to perform a regular calibration. This section provides all the information neces-

sary or alternatively contact our service organisation at your local area office (Ad-

dresses at the back of this book for information on our field calibration service).

Communications

This section contains all the information required for successfully operating your

controller via its communications port. This allows the instrument to be connected as

part of a computer controlled network or singly to a host computer.

Error Messages

This provides information relating to the current state of the control hardware, software

and information about the measured values. This information can be used to localise a

controller fault to a particular section of the instrument, thus enabling the user to rectify

the problem and return the unit to correct operation quickly.

Installation

Section

Installation

Contents Page

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dimensional Details

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Instrument Sealing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rear Terminal Cover

r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.0

1.1

1.2

1.3

2.0

2.1

2.2

2.2.1

2.2.2

2.2.3

2.2.4

2.2.5

2.2.6

2.2.7

2.2.8,

2.2.9

2.2.10

2.2.11

CONNECTIONS AND WIRING

..................................... 3

Instrument Layout .......................................................... 4

Rear Terminal

Connections ......................................

....

Power Supply ................................................................. 6

Inputs ............................................................................. 7

Heat

Process [+] Outputs ............................................. 9

Cool

Process [-] Outputs ............................................ 10

Valve

Positioner Outputs .............................................

1 1

Alarm Outputs .............................................................. 12

Programme and Comms. Driven Relays

..................... 13

Digital Inputs ................................................................ 14

Remote Analogue

inputs ............................................

Retransmission Outputs ............................................... 16

Digital Communications ............................................... 17

3.0 SAFETY and EMC INFORMATION ............................. 18

Installation

1.0

INSTALLATION

Before proceding with installing this instrument please ensure that you are

acquainted with the caution notes in para. 3.0 of this section.

If the instrument is to be panel mounted, a DIN-size 92mm by 92mm cut-out is

required as illustrated.

Should the instrument be

required to be sealed to the

panel surface, up to

IP65,

follow the instructions

detailed in ‘Instrument

Sealing’ paragraph 1.2.

Insert the instrument

through the cutout via the

front of the panel. Install

the mounting clamps, one

on the top and the other

below the instrument.

These clamps are located

from the rear to ensure that

the four feet are firmly

seated in the slots in the

case, as shown in figure

1.1

Dimensional Details

Figure 1

_____-

Tighten the screws firmly with a screwdriver from the rear of the mounting panel;

a torque limiter in each clamp prevents over-tightening.

Panel

cut-out

+0.8

-0 mm

Installation

1.2

Instrument Sealing

A polythene bag within the instrument packing contains the 902 accessory kit

(Part No. LA023792). In this accessory kit is a rubber seal. When this seal is

correctly placed between the sleeve and the panel surface it will provide

protection to the lP65 standard.

If protection of the instrument is not required this seal need not be fitted and only

the installation instructions need be followed.

Fitting the seal should be

carried out as soon as the

instrument is removed from

the packing. Place the seal

over the front of the

instrument so that it sits as

shown in figure 2, against the

back of the bezel. The

instrument can now be

mounted into the panel cut-

out and assembly continued

as described in the

installation instructions.

When fully compressed this

seal increases the projection

of the bezel in front of the

panel by

1.5mm.

Note: It is important that the

panel cut out dimensions are

adhered to for

IP65

to be

effective. There must be no

sharp or burred edges.,

1.3

Rear Terminal Cover

To remove the rear terminal

protection cover four catches

have to be released, two at

the top and two at the bottom.

Insert the tool supplied, in the

accessory kit, to release each

pair of catches.

Refit the cover so that the

four catches engage in their

respective slots.

Figure 2

Figure 3

Installation

2.0 CONNECTIONS AND WIRING

Electrical connections are made

via individual screw terminal

blocks on the rear of the

instrument. All connections are

low current and a

16/0.20

wire

size is adequate. Max. 14 AWG

(1.6mm)(0.064”)

Wires, once connected to the

instrument, can be run up/down

the trough and secured by ties

as shown in figure 4.

The instrument supply should

be fused externally, in

accordance with local wiring

regulations.

Do not over tighten screws as

this will cause damage. Max.

screw torque is 0.4Nm.

Instrument Labels

Labels on the instrument and

case indicate the specific

configuration and terminal

number connections for the

instrument.

This label is found on the

sleeve of the instrument and

indicates the rear terminal

connections for the

instrument ordered.

Figure 4

Product Code :

902S/IS/HRE/CTR/SRE/VH/XM///LE

IT/HAP/CLL/SA/XA///0/600/C/01

Serial Number:

G34534-001-008-03-91

This label is found on the rear of

the instrument and indicates the

ordering code, serial no. etc.

Code :

902S/IS/HRE/CTR/SRE/VH/XM///LE

IT/HAP/CLL/SA/XA////0/600/C/01

Serial Number :

G34534-001-006-03-91

Software Ver. : 1 .OO Service Tel. :

(01903)-268500

Installation

2.1

Instrument Layout

The 902/3/4 series of instruments can easily be configured to most customer

requirements on site. The microprocessor, power supply and display boards are

standard to all 902/3/4 series of instruments, see figure 5. Various plug-in

hardware modules can then be fitted to provide the different functions. These

modules can be allocated to one or two sites on the power supply board. If an

options or analogue communications board is fitted in the instrument, a further

two sites are available for installing these modules, as shown in Figure 6.

Power Supply Board

____)

Options Board

Microprocessor Board

Figure 5. Printed Circuit Board Positions

Channel 1

Channel 3

Channel 2

Channel

Figure 6. Plug-in Module Slot Positions

Installation

2.2 Rear Terminal Connections

CHANNEL 1

CHANNEL

Screw

Termin:

CHANNEL 4

, CHANNEL 3

,ANALOGUE

COMMS

OPTIONS MICRO

PSU

I I

DIGITAL COMMS

DIGITAL INPUTS

PROCESS VARIABLE

Ident. Label Wire Connection

Installation

2.2.1 Power Supply

The power supply can be 85V to

264V,

or a low level

ac/dc

supply of

17-30Vac

40Vdc.

a low level supply is used the positive may be connected to

terminal 24.

Power supply

85V to 264V ac,

17V to 30V ac,

20V to 40V dc

264V ac

17-30Vac

40V dc

III

Suppression Earth

j-m

Terminal R is the radio frequency interference reference for the instrument.

When

despatched

from the factory, terminal

and

&are connected together.

In most cases it is acceptable to connect these terminals to supply earth.

Terminals R and

are connected together by a

link on the power supply pcb.

Link 1

aR0

In a particularly noisy environment it may be

advantageous to separate the RFI from the

mains earth and connect to a cleaner earth

reference if available. If this is the case cut link

LK 1.

I-

)

Installation

2.2.2 Inputs

This instrument has one input which can be set in the configuration to accept a

number of different sensor types. Having set the configuration, the sensor must

be connected to the correct terminals as shown on the following pages.

Thermocouple

Input

When the instrument has been configured for internal cold junction

compensation (CJC), compensation cable of the correct type for the

’

thermocouple used, or the thermocouple itself, must be wired to

’

these terminals. Copper wire must NOT be used.

If an external cold junction (oven/ice reference) is to be used, then copper wires

must be used between the rear terminals of the instrument and the cold junction

reference.

Resistance Thermometer

Note: When three conductors between

input

the bulb and the rear terminals have

2 Wire 3 Wire 4 Wire

identical resistances, the lead resistance

error be minimised. When a four wire

RTD is used the fourth wire is insulated

from all other connections. If a two wire

system is used the lead resistance will

Pyrometer

Input (Low Level)

Input (High Level)

The pyrometer model number determines the rear terminal

connections to be used. Paragraph 4.2.1 of section 4, the

configuration, gives a table listing the various pyrometer model

numbers. If the last column of this table carries the abbreviation

“HL

l/P”

then the “Input (High Level)” terminals should be used.

For all other models of pyrometer, use the “Input (Low Level)”

terminals. For pyrometer codes 48 and 51, (Q004, Q005), a

5OOQ

resistor must be connected across the rear terminals

“H2”

and “H4”, together with the pyrometer wiring. In this case a

suitable resistor, Part No. SUB902 SPARE 500R, colour coded

yellow, will be found in the instrument packing. Pyrometer code 54, (R026/ORK),

requires cold junction compensation within the instrument. The instrument

software will automatically enable this feature, but the value of

“C1

(A)“, see

paragraph 4.2.1 of section 4, the configuration, must be set to

“O”,

to ensure the

correct amount of compensation is applied.

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