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High visibility display
3 color backlight
Multiple character sizes
Easy to assemble and wire
Simplified assembly and wiring
Simple connection of the serial link cable
Tool-free, spring clip mounting
Even easier to configure
No training required: startup wizard, standard applications
4 function keys withre-usable labels
1
Advanced temperature control
Smart tune - PID control
Soft start power limiter
3 relay/SSR outputs
CT input - load current monitoring
Simple configuration
OPC based graphical configurationsoftware
Universal TC, 3-wire RTD and linear mA,mV, V input
DIN Rail TemperatureController RFSRFS
Text Display
Easy connectivity
Modular interconnection
RS-485 Modbus®
2
RFS - Compact DIN Rail Mounted Controller
Overview
Designed to offer outstanding control performanceand provide a comprehensive solution for a wide
variety of applications; such as food processing, plasticmanufacturing, and process applications requiring heat/coolcontrol and process protection alarms in a compact DIN railmounted package.
Universal thermocouple or RTD input coupled with aresponsive SMART auto-tuning PID control algorithm that isequipped with special functions, including soft start and non-linear cooling. A complete set of process protection alarmfunctions; high and low limit, band and deviation are included.
Modular interconnection allows simultaneous connection ofall common instrument elements: power supply, serial interface, logic input and open collector output forcommon alarms. The RFS-AL alarm-logic input expansion unit makes use of the modular interconnectionfunction to provide additional I/O capacity.
Smart tuning
Automatically adjusts the PID parameters accordingto the process dynamics. An important characteristicof the Eurotherm Controls continuous self tuningalgorithm is its ability to optimize control
parameters without injecting any artificialdisturbances into the system.
Synchronized pre-heating
Eliminates differential heating during startup dueto different heat rates of individual heaters inapplications such as extruders andinjection hot runner control.
The setpoint ramp rates of all heatingzones within a group aresynchronized by “holding back” theramping setpoint. In order toachieve this, the individual loopband alarms are controlled by thecommon alarm output and isolated logicinput functions.
PC interface port + OPC basedconfiguration software
The integrated configuration port uses specialsoftware and an adaptor allowing:
1. Easy configuration of the instrument, with descriptions of the parameters and therelative limits.
2. Computer storage of the completeconfiguration allowing it to be copied to other RFS units.
3. Copying and cloning of the configuration to a new instrument.
4. The configuration interface port can be used for configuration and formonitoring the process during setup.
Process protection alarms
Process (high or low limit), Band andDeviation alarm outputs are available withthe additional flexibility of latching andmasking functions until the processvariable reaches the alarm threshold.
Band and Deviation alarms are also masked after asetpoint change until the process variable reachesthe alarm threshold. The alarm latching functionholds the alarm on until it is acknowledged.
Sequential addresses (Modbus) forcommonly accessed parameters
To maximize the data transfer rates between theRFS and the host supervisory system, importantoperating parameters are grouped. Digital statusinformation is transferred as data words toincrease efficiency. The RFS is able tocommunicate relevant parameter informationwith a single data request, instead of a series ofseparate address operations.
3
Startup energy management
To reduce the maximum electrical loading at machine startup, the sequence of theRFS control outputs is scheduledaccording to the selectedinstrument Modbus address. Thissignificantly reduces maximumstartup current requirements andoffers potential savings in electricalinstallation capacity and cablingspecification requirements.
Communication availability of I/O
All RFS I/O can be read directly over the Modbuscommunication interface by the host supervisorysystem. Additionally, the communication host can write to RFS outputs that are not assigned as alarm or status functions. This expands availablePLC and host supervisory system I/O, simplifiesmachine troubleshooting and provides the ability toperform remote diagnostics.
OFD - output failure detection(optional)
Using the CT input, the output failure detectionfunction monitors the current in the load driven by output 1. Load and actuator protection isprovided in the following manner:
During the ON period of the output, theinstrument measures the current through the loadand generates an alarm condition if the current islower than a pre-programmed threshold. A lowcurrent indicates a partial or total breakdown ofthe load or actuator SSR.
During the OFF period of the output, the instru-ment measures the leakage current through theload and generates an alarm condition if thecurrent is higher than a pre-programmed thresholdvalue. A high leakage current indicates a short circuit of the actuator.
Specifications
Case: PC/ABS grey
Self-extinguishing degree: V0 according to UL 746C
Front protection: IP20
Dimensions: 131 x 117 x 22.5mm
Weight: 250g max.
Power supply: switching 24VAC/VDC(±10% of nominal value)
Power consumption: 6VA
Insulation: reinforced insulation is guaranteedbetween supply input, instrumentinputs and outputs
Common mode rejection: 120dB @ 50/60Hz
Normal mode rejection: 60dB @ 50/60Hz
Installation: DIN rail mounting
Installation category: II
EMC/Safety: CE certified; compliant with regs89/336/EEC (harmonized referencestandard EN-50081-2 and EN-50082-2) and 73/23/EEC e93/68/EEC (harmonized referencestandard EN 61010-1)
Sampling time: 250mSec for linear inputs500mSec for TC or RTD inputs
Accuracy: ±0.2% f.s.v. @ 25°Cwith nominal supply voltage
Operating temperature: 0 to +50°C
Storage temperature: -20 to +70°C
Humidity: 20% to 85% RH, non-condensing
Measurement inputs
All inputs are configurable andcalibrated at the factory.
RTD Input
Type: 3-wire Pt100
Calibration: according to DIN 43760
Measuring current: 130µA
Line resistance: auto-compensation up to 20 ohmsper wire with no measurable error
Engineering units: programmable ºC or ºF
Sensor break: indicates break of sensor or one ormore wires; indicates short circuitwhen sensor resistance <12 ohms
Pt100 3-wireRTD°C°F
-200.0/400.0-200.0/400.0
-200/800-330/1470
4
Linear Inputs
Scaling: programmablefrom keyboard-2000 to 4000
Decimal point: programmable to any position
Thermocouple Input
Sensor break: open circuit sensorbreak detection
Cold junction compensation: automatic compensation
of temperature beween 0 and 50ºC
Cold junction compensation error: 0.1ºC/ºC
Input impedance: 1M ohms
Calibration: according to IEC 584-1:1995; DIN 43710-1977for TC type L
Current Transformer Input
Input current: 50mA,50/60Hz
Full scale range: 0-10A, 0-100A(configurable)
Resolution: 0-20A: 0.1A21-100A: 1A
Programmable output: NO or NC relay controloutput; Logic level 1 or 0;SSR control output
Minimum period: On and Off: 400mSec
Input 0-20 mA 4-20 mA 0-60 mV 12-60 mV
Impedance <5 ohms <5 ohms >1M ohms >1M ohms
TC L L J J K K N R S T
ºC 0/400.0 0/900 -100.0/400.0 -100/1000 -100.0/400.0 -100/1370 -100/1400 0/1760 0/1760 -200.0/400.0
ºF 0/1650 -150/1830 -150/2500 -150/2550 0/3200 0/3200 -330/750
Output 1 and 2 - SSR
Function: control output
Type: non-isolatedLogic level 1:
27VDC max. @ 1mA; 14VDC min. @ 20mA
Logic level 0: < 0.5V
Logic Input
Function: selection of the operatingsetpoint (SP or SP2) or ofthe temporary block ofsetpoint ramp
Type: dry contact excitation 8V,8mA
Insulation: functional insulation
Insulation voltage: 50Vrms
Relay Type
Output 1
Function: control output
Type: SPST
Contact load: 3A @ 250VAC max. onresistive load
Output 2
Function: control output or alarm
Type: relay with SPSTcontact
Contact load: 3A @ 250VACmax. on resistiveload
Output 3
Function: alarm output
Type: relay with SPDTcontact
Contact load: 3A @ 250VACmax. on resistiveload
Output 4
Function: group alarm(common output)
Type: open collector
Contact load: 20mA max. @ 48V
Outputs
5
Control Action
Type: one (heating) or two(heating/cooling) controloutputs
Output action: time proportioning
Control action: ON/OFFPI or PID + SMART
Proportional band: 1.0% to 100.0% of the inputrange for one controlelement;1.5% to 100.0% of the inputrange for two controlelements;Setting PB = 0 causesON/OFF control
Hysteresis: programmable from 0.1% to10.0% of the input span
Integral time: programmable from 1 secondto 20 minutes (or none)
Derivative time: programmable from 1 secondto 10 minutes (or none)
Integral offset: for one control element(heating), the offset isprogrammable from 0 to100% of the output range;for two control elements(heating/cooling) the offset isprogrammable from -100% to+100% of the output range
Output 1 cycle time: 1 second to 200 seconds
Manual to Auto: bumpless
Output 2 relative gain: Programmable from 0.20 to1.00 of the proportional band
Output 2 cycle time: 1 second to 200 seconds
Overlap/deadband: programmable from -20%(deadband) to +50% (overlap)of the proportional band
(for ON/OFF control)
Alarms
Alarm action: direct or inverse
Alarm functions: configurable asprocess, band ordeviation alarms
Alarm reset: programmable asautomatic or manual
Alarm masking: configurable as maskedor unmasked alarms
Hysteresis: 0.1 to 10.0% of input
Dual Setpoint Selection
Two user configurable operation setpoints are selectable through logic input or thecommunication interface. For ON/OFF controlaction, this provides a method for fast andconvenient run-hold switching, either by anexternal switch or by a host supervisory system.
Serial Interface
Type: isolated RS-485
Protocol: Modbus (2-wire)
Baud rate: 600 to 19200 BAUD
Byte format: 8 bit
Parity: even, odd or none
Stop bit: one
Address: 1 to 254
Voltage levels: according to EIA comm standard
Line loading: 1/4 unit load
24V power supply/comms
CPI connector
status indicator
OUT 3 relay
CT input
Dig input
1 2 3 4 5
678910111213
141516
171819
20212223
OUT 2 relay
OUT 1 SSR
PV
sen
sor
input
modula
r buss
ed
inte
rconnec
tion
Dimensions Connections
117 (4.606)
101 (3.976)22.5
(0.886)
8.5 (0.335)
131
(5.1
57)
120
(4.7
24)
6
RFS-AL Compact Alarm Expansion Module
Specifications
Output
Function: alarm output
Type: relay with SPDT contact
Contact load: 8A @ 250VAC max. on resistive load
Logic Input
Function: selection of theoperating setpoint (SP or SP2) or temporaryhold of setpoint ramp
Type: dry contact excitation8V, 8mA
Insulation: functional insulation
Insulation voltage: 50Vrms
117 (4.606)
101 (3.976)22.5
(0.886)
8.5 (0.335)
131
(5.1
57)
120
(4.7
24)
24V power supply/comms
status indicator
OUT 4 relay
Dig input
1 2 3 4 5
modul
ar b
usse
d
inte
rconn
ection
Dimensions Connections
7
Text Display
Easy to use
High visibility display• Display unit with 122 x 32 pixels and
up to 4 lines of 20 characters• Large characters (up to 17mm high),
1 line of 5 characters• Three color backlighting for better
alarm indication
Extended graphics• Multiple languages, including
Cyrillic and katakana• 128 customizable characters• Text import/export for translation
User interface• Easy navigation between messages • Two contextual command keys• Six service keys• Three passwords
Specifications
Operating temperature: 0 to 55ºC
Humidity: 20% to 85% RH
Communication port: DB25 female, RS-232, RS-485,Modbus Master,RTU up to 19.2K baud
Supply Voltage: 24VDC (18-30VDC, 5W max.)
Protection: IP65 (front)
Certification: CE, uL CSA
Dimensions
Enhance the design of your machine, overcomeproblems connected with difficult environmentsand increase user-friendliness for the operator!
Connections
9. Modbus10. 24VDC11. Not used
132(5.196)
118(4.645)7
(0.275)7
(0.275)
74(2
.913
)
104
(4.0
9)
31(1
.22)
43(1
.693
)
Ordering codes
Configuration Fields
1 2 3 4 5 6 7 8 9
RFS 5 3 5 0 0ER
1 - Model Code
RFS Base RFS
2 - Input
5 TC, RTD
4 - Output 1
1 relay
6 SSR
5 - Output 2
0 none
1 relay
6 SSR
6 - Options
0 none
4 OFD + logic in
5 alm2 + OFD + logic in
7 - Power Supply
5 24VDC
Connector Kit . . . . . . . . . . . . . . . . . . . . . . .ARFSKITC0N0002 x 2 Pin Connector2 x 3 Pin Connector1 x 5 Pin Connector1 x 8 Pin Connector
Interconnecting Bus Cable . . . . . . . . . . . .ARFSFLAT13000Current Tranformers
Current Transformer 10A . . . . . . . . . . . . . .7ERR10000000Current Transformer 25A . . . . . . . . . . . . . .7ERR20000000Current Transformer 50A . . . . . . . . . . . . . .7ERR40000000Current Transformer 100A . . . . . . . . . . . . .7ERR50000000
PC Configurator for RFS . . . . . . . . . . . . . . . .CPI12210000NRFS Alarm Unit . . . . . . . . . . . . . . . . . . . . .ARFSAL00000ERRFS User Manual CD . . . . . . . . . . . . . . . . . . . . . . .HA136732
3 - Control Action
3 PID + smart
RFS
Text Display4 Line Text Operator Station . . . . . . . . . . . . . . . . . . .71-1165Text Display Config Software and Cable . . . . . . . . .71-1166Cable (RFS to 4 Line Text Display) . . . . . . . . . . . . . .A-60222
May 2004 HA136733
©2004 Eurotherm Controls Incorporated. All rights reserved. Everyeffort has been taken to ensure the accuracy of this specification.However, in order to maintain our technological lead we are con-tinuously improving our products which could, without notice, result in amendments or omissions to these specifications. We cannot accept responsibility for damage, injury, or loss expenses resulting fromthis document.
741-F Miller Drive, Leesburg, Virginia 20175, Phone 703 443 0000, Fax 703 669 1300, [email protected], www.eurotherm.com
For more information contact your local representative:
A c t i o n I n s t r u m e n t s • B a r b e r - C o l m a n • E u r o t h e r m C h e s s e l l • E u r o t h e r m C o n t r o l s