VL SUPPLY VOLTAGE OPTION
This is suitable for connection to a power
supply of 24V ac -15,+10% 48-62Hz or
24Vdc -15,+20%, 20W maximum.
Note.
This MUST be fused using a T type fuse
(EN60127 time-lag type) rated at 4A.
!
Caution
Ensure that mains supplies ar
e connected to the power supply terminals (100 to 230V
ac only), the
fixed relay terminals or to relay or triac modules. Under no circumstances should mains supplies
be connected to any other terminals.
A protective Earth connection is required. ALWAYS ensure that the protective Earth is fitted
first and disconnected last.
INSTALLATION CATEGORY AND POLLUTION DEGREE
This unit has been designed to conform to BS EN61010 installation category II and
pollution degree 2. These are defined as follows:
Installation category II.
The rated impulse voltage for equipment on nominal
230V ac mains is 2500V.
Pollution degree 2.
Normally, only non-conductive pollution occurs. However,
a temporary conductivity caused by condensation must be expected.
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 unit
must be installed in an enclosure.
WIRING
It is important to connect the unit in accordance with the data on this sheet,
ensuring the protective Earth connection is ALWAYS fitted first and disconnected
last. Wiring MUST comply with all local wiring regulations, i.e. UK, the latest IEE
wiring regulations (BS7671), and USA, NEC Class 1 wiring methods. Only use
copper conductors for connections. Terminal tightening torque 0.4Nm (3.5lbin) max.
Caution
Do not connect AC supply to low voltage sensor input or low level inputs and outputs.
POWER ISOLATION
The installation must include a power isolating switch or circuit breaker. This
should be in close proximity (1 meter) to the unit, in easy reach of the operator and
marked as the disconnecting device for the unit.
OVERCURRENT PROTECTION
It is recommended that the power supply to the system is fused appropriately to
protect the cabling to the unit.
CONDUCTIVE POLLUTION
Electrically conductive pollution, i.e. carbon dust, MUST be excluded from the enclosure
in which the unit is installed. To secure a suitable atmosphere in conditions of
conductive pollution, fit an air filter to the air intake of the enclosure. Where
condensation is likely, include a thermostatically controlled heater in the enclosure.
OVER-TEMPERATURE PROTECTION
When designing a contol system it is essential to consider the consequences should
any part of the system fail. In temperature control applications the primary danger is
the heating will remain constantly on. This could spoil the product, but more
seriously damage the process machinery being controlled, or even cause a fire.
This may occur if the,
temperature sensor is detached from the process
thermocouple wiring has short circuited
unit fails with the heating output constantly on
external valve or contactor is sticking in the heating condition
unit setpoint is set to high
Where damage or injury can occur, it is recommended that a separate
over-temperature protection unit, and independant temperature sensor, to isolate the
heating circuit, is fitted.
Note. Alarm relays within the unit will not indicate all failure conditions.
INSTALLATION REQUIREMENTS FOR EMC
To comply with European EMC directive certain installation precautions are necessary:
General guidance. Refer to
EMC Installation Guide
, Part no. HA025464.
Relay outputs. It may be necessary to fit a suitable filter to suppress conducted
emissions. Filter requirements depend on the type of load.
Table top installation. If using a standard power socket, compliance to
commercial and light industrial emissions standard is usually required. To
comply with conducted emissions standard, a suitable mains filter must be
installed.
Installation Safety Requirements
Various symbols used on the instrument are described below:
!
Caution (refer to the
accompanying documents)
Protective earth
terminal
Functional
(ground) earth
MANUFACTURING ADDRESS
U.K.
Worthing
Eurotherm Limited
Telephone: (+44 1903) 268500
Fax: (+44 1903) 265982
E-mail:
Web:
www.eurotherm.com
General
This unit is intended for Industrial Temperature and Process Control applications,
within the requirements of the European Directives on Safety and EMC.
Warning
The Safety and EMC protection provided can be seriously impaired, if the unit is not used in
the manner specified. The installer MUST ensure the Safety and EMC of the installation
.
UNPACKING AND STORAGE
If on receipt, the packaging or unit are damaged, do NOT install, but contact the
supplier. If being stored before use, protect from humitity and dust in an ambient
temperature range of -30ºC to +75ºC.
Caution:
Electrostatic discharge
Always observe all electrostatic precautions, before handling the unit.
SERVICE AND REPAIR
The unit has no servicable parts. Contact the supplier for repair.
CLEANING
Use Isolpropyl Alcohol to clean label. Labels will become illegible if water or water
based products are used. Use a mild soap solution to clean other exterior surfaces.
© Copyright Eurotherm Limited™ 2013
All rights are strictly reserved. No part of this document may be reproduced, modified, or
transmitted in any form by any means, nor may it be stored in a retrieval system other than for
the purpose to act as an aid in operating the equipment to which the document relates, without
the prior written permission of Eurotherm Limited.
Eurotherm Limited pursues a policy of continuous development and product improvement. The
specification in this document may therefore change without notice. The information in this
document is given in good faith, but is intended for guidance only. Eurotherm Limited will
accept no responsibility for any loses arising from errors in this document.
Power Supply
Note.
Labels may differ between communication protocol variants.
POWER SUPPLY SPECIFICATION
VH SUPPLY VOLTAGE OPTION
This is suitable for connection to a power
supply of between 100 and 230V
ac ±15%
,
48 to 62 Hz, 20W maximum.
Note.
This MUST be fused using a T type fuse
(EN60127 time-lag type) rated at 1A.
Digital I/O Terminals
The eight digital I/O connections provided can be individually configured as,
Input.
Inputs are Logic (-1 to 35Vdc) or Contact Closure, and can be
configured for Manual, Remote, Run, Hold, Reset, etc,
Output.
Outputs are open collector requiring an external power supply, and can
be configured as event Alarms, Time proportioning or valve position outputs.
Note.
These terminals are NOT isolated from the Instrument ground.
DIGITAL INPUTS
Common
Logic Inputs
See Note 1, & 2
Common
Contact
Closure Inputs
See Note 1
See Note 3
Notes Digital Inputs
1
Logic Inputs or Contact Closure can be
wired in any combination.
2
Logic Inputs can accept drive signals
from a voltage source
Vol
ta
ge
Drive Signal
Limits
<2
V
Active (1)
-1V
>4
V
Inactive (0)
+35V
3
D8 supports Digital Inputs Only.
Thyristor
Unit
Thyristor
Unit
SS
R
SS
R
Relay
Relay
Relay
External
PS
U
Notes Digital Outputs
1
Relay, Thyristor or Solid State Relay
(SSR) Drive can be wired in any
combination.
2
Digital Outputs support 10 to 35Vdc
External Power Supply Unit (PSU)
3
Each output is current limited to 40mA.
See Note 2
I/O Expander Terminals
DATA TRANSFER
The primary use of the I/O Expander terminals (E1
and E2) is to connect an I/O Expander Module
(Model No 2000IO). This adds a further 20 digital
inputs and 20 digital outputs to this instrument.
Data transfer is performed serially via a two wire
interface from instrument to expander.
DIGITAL INPUT
These terminals can only be used as a secondary
digital input if the I/O Expander is not fitted. If
used in this way simply connect a 2K2, ¼W
limiting resistor in series with the input.
To
I/O Expander
Module
2K
2
Limits
-1V , +35V
COMMUNICATIONS
SEE COMMUNICATIONS -
DEVICENET™, MODBUS/TCP, MODBUS
AND EI-BISYNCH, AND PROFIBUS™
Process Variable (PV) Input Terminals
The fixed Process V
ariable (PV) input terminals can be configured for Thermocouple,
PRT
(Pt100), Pyrometer,
V oltage (e.g. 0-10Vdc) or Milliamp (e.g. 4-20mA) and
vacuum - log10 signals. These sensors are used to provide inputs to Control Loop 1.
Note.
The terminals are isolated from the Digital I/O. If using shielded cables, only ground one
end to avoid ground loop currents.
Voltage
(V)
Current
(mA)
See Note 4
+
-
2.49
Ω Ω Ω Ω Ω
mA
+
-
V
Milli-volts
(mV)
+
-
mV
See Note 5
Notes
1
Use appropriate compensating cable when configuring and extending a Thermocouple input.
2
Operating range between 0V to 10V
or 0V to 2V
.
3
Operating range up to 80mV .
4
Operating range between 0 to 20mA or 4 to 20mA.
5
A link MUST be fitted between V+ and V
- if using a 2-wire PRT
. The resistance of each wire
in a 3-wire PRT must be the same.
6
Do NOT run power and signal cables together.
2-, 3-wire Platinum
Resistance Thermometer
(PRT)
Thermocouple or
Pyrometer
See Note 1
+
-
See Note 3
See Note 2
MODULES
SEE PLUG-IN I/O MODULES
Note.
Module position 2 is for future expansion.
24Vac
(-15,+10%)
or 24Vdc
(-15,+20%)
100 to
230Vac
Relay Terminals
These terminals can be configured as a control
output, an alarm, or event output. A single
changeover relay is provided as standard.
Notes
1
Connect the Power Supply last to avoid
electrical damage.
2
Use copper conductors only.
3
Do NOT run power and signal cables
together.
Common
Normally
Open
(NO)
Normally
Closed
(NC)
Relay Rating
Max - 264Vac, 2A
Min - 1V, 1
mA
Analogue Input Terminals
The Analogue Input
Terminals (BA
and BB) accept volts, e.g. 0-10Vdc, or Milliamp,
e.g. 4-20mA, signals. The signals can be used for remote setpoint input, remote
setpoint trim or as a high level PV input to a control loop and can be characterised
to match a particular curve from a transmitter.
Note.
The terminals are NOT isolated from the Digital I/O and do NOT support direct input
from a Thermocouple.
Notes
1
To earth screened cables, connect the screen at supply end.
2
To earth screened cables, connect the screen to terminal BC.
Isolated Voltage
(0V - 10V)
Non-Isolated Current
(0 - 20mA) (4 - 20mA)
See Note 1
+
-
100
Ω Ω Ω Ω Ω
Isolated Current
(0 - 20mA) (4 - 20mA)
+
-
See Note 2
Non-Isolated Voltage
(0V - 10V)
See Note 1
+
-
+
-
See Note 2
100
Ω Ω Ω Ω Ω
DIGITAL OUTPUTS
+
-
Note
Wiring Specifics.
All electrical connections made to screw terminals protected by a clear plastic
hinged cover, used to prevent accidental contact with live wires. The terminals accept wire sizes
from 0.5 to 1.5mm2 (16 to 22 A
WG) and should be tightened to a torque of 0.4Nm
(3.5lbin). If
using crimp connectors, the correct size is AMP
, part number 349262-1.
High Volt
age Supply
Low V
oltage
Supply
Legend
Supply
Legend
Supply
L
Line
24
24V ac/dc
N
Neutral
24
24V ac/dc
Earth
Earth
-
+
2604/2704 HIGH PERFORMANCE
CONTROLLER/PROGRAMMER
INSTALLATION AND WIRING INSTRUCTIONS
These instruments are modular, fully configurable, high accuracy, high stability
temperature and process controllers, available in a single, dual or three loop format.
Each unit is supplied as a specific hardware configuration, e.g. there are five ‘slots’
that contain specific plug in modules, identified by a hardware code printed on the
label on the side of the controller at time of ordering. The unit can also be supplied
with pre-configured software for some simple applications according to an optional
Configuration Code, or configured via the front panel or iTools Engineering Studio.
The 2604 has a dual 7-segment display of process value and setpoint with a LCD
panel for display of information and user defined messages. The user interface is menu
driven via the display and seven front panel keys.
Part No. HA029465 (CN29750)
Issue 3 Mar 13
The 2704 has a 120 x 160 pixel electroluminescent display of all process value and
setpoint information and user defined messages. The user interface is menu driven via
the display and seven front panel keys.
FEATURES INCLUDE:
Advanced ramp/dwell programmer with storage of up to 50 programs for the 2604
and 60 programs for the 2704.
Application specific controllers (including Handbook), i.e. Vacuum Furnace,
Carbon Potential, Humidity, Boiler (TDS) and Melt Pressure.
A wide variety of configurable inputs, including thermocouples, Pt100 resistance
thermometers (PRT) and high level process inputs.
Loop configuration as PID, On/Off or motorised valve position, with control of
strategies including single, cascade, override and ratio control.
PID control outputs can be relay, logic, triac or dc with motorised valve position
outputs being relay triac or logic.
Simplified commissioning and optimised process available via Auto Tuning and
PID gain scheduling.
Note.
Refer to the Engineering Handbook for Operation and Configuration details, available on
the enclosed CD (Part No. LA029175) or via the website.
2704
2604
WARNING
This instrument is fitted with a back up battery which should be changed at regular
intervals.
It is important to maintain a record of instrument configuration or, preferably, a
clone file which can be re-loaded after a battery change or any other maintenance.
The battery is not serviceable, contact your local service centre to make suitable
arrangements. For further information see the User Manuals at www.eurotherm.co.uk
