Eurotherm
Multi Loop DCS Systems
  Overview
The latest range of advanced process controllers from Eurotherm® provide precision control of temperature and a host of other process variables together with an abundance of advanced options making it the most adaptable product in its class.
The emphasis is on flexibility yet the 3500 controllers still maintain ease of use. A simple ‘Quick Start’ code is used to configure all the basic functions essential to controlling your process. This includes input sensor type,
measurement range, control options and alarms making ‘Out the Box’ operation truly achievable. More advanced features are configured using a PC based graphical configuration tool enabling users to pick function blocks from a library then connect them together using soft wiring.
The large 5-digit display provides a clear and unambiguous indication of the process value. A four-line message centre provides custom or standard views of important information to the user while vertical and horizontal bargraphs provide at a glance visual indication of the process.
OEM Security enables a user to protect their intellectual property by preventing unauthorised cloning of the configuration.
Dual loop
Two independent PID loops make the 3500 ideal for interactive processes such as those found in carburising furnaces, environmental chambers and autoclaves. The loops may also be ‘soft’ wired together in creative ways to create cascade, ratio or other intelligent control strategies
     
Technical Specification  
  • General
    Environmental performance
    Temperature limits Operation: 0 to 50°C
    Storage: -10 to 70°C
    Humidity limits Operation: 5 to 95% RH non condensing
    Storage: 5 to 95% RH non condensing
    Panel sealing: IP65, Nema 4X
    Vibration: 2g peak, 10 to 150Hz
    Altitude: <2000 metres
    Atmospheres: Not suitable for use in explosive or
    corrosive atmosphere
    Electromagnetic compatibility (EMC)
    Emissions and immunity: BS EN61326
    Suitable for domestic, commercial and light industrial as well as heavy
    industrial. (Domestic/light (Class B) emissions. Industrial (Class A)
    environmental immunity emissions.
    With Ethernet module fitted product only suitable for Class A emissions.
    Electrical safety
    BS EN61010: Installation cat. II; Pollution degree 2
    INSTALLATION CATEGORY II
    The rated impulse voltage for equipment on nominal 230V mains is 2500V.
    POLLUTION DEGREE 2
    Normally, only non-conductive pollution occurs. Occasionally, however, a
    temporary conductivity caused by condensation shall be expected
    Physical
    Panel mounting: 3508: 1/8 DIN
    3504: 1/4 DIN
    Weight: 3508: 400g
    3504: 600g
    Panel cut-out dims: 3508: 45W x 92Hmm
    3504: 92W x 92Hmm
    Panel depth: Both 148mm
    Operator interface
    Type: STN LCD with backlight
    Main PV display 3508: 4 1/2 digits. green
    3504: 5 digits, green
    Message display 3508: 8 character header and 3 lines of 10
    characters
    3504: 16 character header and 3 lines of 20
    characters
    Status beacons: Units, outputs, alarms, program status,
    program events, active setpoint, manual,
    remote SP
    Access levels: 3 operator plus config. Password
    protected
    User pages
    Number: 8
    Parameters: 64 total
    Functions: Text, conditional text, values, bargraph
    Access level: User selectable (level 1, 2 or 3)
    Power requirements
    Supply voltage: 85 to 264V ac, –15%, +10%,
    48 to 62Hz, max 20W (3508 15W)
    24Vac, -15%, +10%.
    24Vdc, -15% +20% ±5% ripple voltage
    max 20W (3508 15W)
    Inrush current
    High Voltage (VH): 30A duration <100μS
    Low Voltage (VL): 15A duration <100μS
    Approvals
    CE, cUL listed (file E57766), Gost
    Suitable for use in Nadcap and
    AMS2750D applications under System
    Accuracy Test calibration conditions
  • Communications
    No of ports: 2 modules can be fitted
    Slot allocation: Modbus RTU or I/O expander only in
    J comms port
    Serial communications option
    Protocols: Modbus RTU Slave
    Profibus DP
    DeviceNet
    EI-Bisync (818 style mnemonics)
    Modbus RTU master broadcast (1parameter)
    I/O Expander
    Isolation: 264V ac, double insulated
    Transmission standard: EIA232, EIA485, CAN (DeviceNet), Profibus
    Ethernet communications option
    Protocol: Modbus TCP, 10baseT
    Isolation: 264V ac, double insulated
    Transmission standard: 802.3
    Features: DHCP client, 4 simultaneous masters,
  • Main process variable input
    Calibration accuracy: <±0.1% of reading ±1LSD (Note 1)
    Sample rate: 9Hz(110ms)
    Isolation: 264Vac double insulation from the PSU and communication
    Input filter: Off to 59.9s. Default 1.6s
    Zero offset: User adjustable over full range
    User calibration: 2-point gain & offset
    Thermocouple
    Range: Uses 40mV and 80mV ranges dependent on type
    Types: K, J, N, R, S, B, L, T, C, PL2, custom download x 2
    Resolution: 16 bits
    Linearisation accuracy: <0.2% of reading
    Cold junction compensation: >40:1 rejection of ambient change External reference of 0°C, 45°C and 50°C
    Cold junction accuracy: <±1°C at 25°C ambient
    Resistance thermometer
    Range: 0-400Ω (-200°C to +850°C)
    Resistance thermometer types: 3-wire Pt100 DIN 43760
    Resolution (°C): <0.050°C with 1.6sec filter
    Resolution: 16 bits
    Linearity error: <±0.03% (best fit straight line)
    Calibration error: <±0.310°C/°C, ±0.023% of measurement at 25°C
    Drift with temperature: <±0.010°C/°C, ±25ppm/C of measurement from 25°C
    Common mode rejection: <0.000085°C/V (maximum of 264Vrms)
    Series mode rejection: <0.240°C/V (maximum of 280mV pk-pk)
    Lead resistance: 0Ω to 22Ω , matched lead resistance
    Input impedance: 100MΩ
    Bulb current: 200μA
    40mV Range
    Range: -40mV to +40mV
    Resolution (μV): <1.0μV with 1.6sec filter
    Resolution: 16 bits
    Linearity error: <0.003% (best fit straight line)
    Calibration error: <±4.6μV, ±0.053% of measurement at 25°C
    Drift with temperature: <±0.2μV/C, ±28ppm/C of measurement from 25°C
    Common mode rejection: >175dB (maximum of 264Vrms)
    Series mode rejection: >101dB (maximum of 280mV pk-pk)
    Input leakage current: ±14nA
    Input impedance; 100MΩ
    80mV Range
    Range: -80mV to +80mV
    Resolution (μV): <3.3μV with 1.6sec filter
    Resolution: 16 bits
    Linearity error: <0.003% (best fit straight line)
    Calibration error: <±7.5μV, ±0.052% of measurement at 25°C
    Drift with temperature: <±0.2μV/°C, ±28ppm/C of measurement from 25°C
    Common mode rejection: >175dB (maximum of 264Vrms)
    Series mode rejection: >101dB (maximum of 280mV pk-pk)
    Input leakage current: ±14nA
    Input impedance: 100MΩ
    2V Range
    Range: -1.4V to +2.0V
    Resolution (mV): <90μV with 1.6sec filter
    Resolution: 16 bits
    Linearity error: <0.015% (best fit straight line)
    Calibration error: <±420μV, ±0.044% of measurement at 25°C
    Drift with temperature: <±125μV/C, ±28ppm/C of measurement from 25°C
    Common mode rejection: >155dB (maximum of 264Vrms)
    Series mode rejection: >101dB (maximum of 4.5V pk-pk)
    Input leakage current: ±14nA
    Input impedance: 100M
    10V Range
    Range: -3.0V to +10.0V
    Resolution (mV): <550μV with 1.6sec filter
    Resolution: 16 bits
    Linearity error: <0.007% of reading for zero source
    resistance. Add 0.003% for each 10Ω
    of source plus lead resistance
    Calibration error: <±1.5mV, ±0.063% of measurement at 25°C
    Drift with temperature: <±66μV/C, ±60ppm/C of measurement from 25°C
    Common mode rejection: >145dB (maximum of 264Vrms allowed)
    Series mode rejection: >92dB ((maximum of 5V pk-pk allowed)
    Input impedance: 62.5kΩ to 667kΩ depending on input voltage
  • Digital IO (LA and LB)
    Isolation: Not isolated from each other. 264V ac double insulation from the PSU and communication
    Input
    Rating: Voltage level: Closed 0 to 7.3Vdc Open 10.8 to 24Vdc
    Contact closure: Open >1200Ω Closed <480Ω
    Functions: Includes program control, alarm acknowledge, SP2 select, manual, keylock, RSP select, standby Output
    Rating: 18Vdc >9mA <15mA
    Functions: Includes control
  • AA Relay
    Type: Form C (changeover)
    Rating: Min 1mA @ 1V dc, Max 2A @ 264V ac resistive 1,000,000 operations with external snubber
    Isolation: 264Vac double insulation
    Functions: Includes control outputs, alarms, events, status
  • Input / Output modules
    IO Modules 3508: 3 modules can be fitted
    3504: 6 modules can be fitted
    IO Expander: 20 Digital inputs, 20 relay outputs
  • Analogue input module
    Calibration accuracy: ±0.2% of reading ±1LSD
    Sample rate: 9Hz (110ms)
    Isolation: 264Vac double insulation
    Input filter: Off to 59.9s. Default 1.6s
    Zero offset: User adjustable over full range
    User calibration: 2-point gain & offset
    Functions: Includes process input, remote setpoint, power limit
    Thermocouple
    Range: -100mV to +100mV
    Types: K, J, N, R, S, B, L, T, C, PL2, custom
    Resolution (μV): <3.3μV @ 1.6s filter time
    Effective resolution: 15.9 bits
    Linearisation accuracy: <0.2% of reading
    Cold junction compensation: >25:1 rejection of ambient change
    External reference of 0°C, 45°C and 50°C Cold
    junction accuracy: <±1°C at 25°C ambient
    Resistance thermometer
    Range: 0-400Ω (-200°C to +850°C)
    Resistance thermometer types: 3-wire Pt100 DIN 43760
    Resolution (°C): <±0.08°C with 1.6sec filter
    Effective resolution: 13.7 bits
    Linearity error: <0.033% (best fit straight line)
    Calibration error: <±(0.4°C + 0.15% of reading in °C)
    Drift with temperature: <±(0.015°C + 0.005% of reading in °C) per °C
    Common mode rejection: <0.000085°C/V (maximum of 264Vrms)
    Series mode rejection: <0.240°C/V (maximum of 280mV pk-pk)
    Lead resistance: 0Ω to 22Ω, matched lead resistance
    Bulb current: 300μA
    100mV Range
    Range: -100mV to +100mV
    Resolution (μV): <3.3μV with 1.6s filter time
    Effective resolution: 15.9 bits
    Linearity error: <0.033% (best fit straight line)
    Calibration error: <±10μV, ± 0.2% of measurement at 25°C
    Drift with temperature: <±0.2μV + 0.004% of reading per °C
    Common mode rejection: >146dB (maximum of 264Vrms)
    Series mode rejection: >90dB (maximum of 280mV pk-pk)
    Input leakage current: <1nA
    Input impedance: >100M
    2V Range
    Range: -0.2V to +2.0V
    Resolution (μV): 30uV with 1.6s filter time
    Effective resolution: 16.2bits
    Linearity error: <0.033% (best fit straight line)
    Calibration error: <±2mV + 0.2% of reading
    Drift with temperature: <±0.1mV + 0.004% of reading per °C
    Common mode rejection: >155dB (maximum of 264Vrms)
    Series mode rejection: >101dB (maximum of 4.5V pk-pk)
    Input leakage current: <10nA
    Input impedance: >100M
    10V Range
    Range: -3.0V to +10.0V
    Resolution (μV): <200μV with 1.6sec filter
    Effective resolution: 15.4 bits
    Linearity error: <0.033% (best fit straight line)
    Calibration error: <±0.1mV + 0.02% of reading per °C
    Drift with temperature: <± 0.1mV + 0.02% of reading per °C
    Common mode rejection: >145dB (maximum of 264Vrms)
    Series mode rejection: >92dB (maximum of 5V pk-pk)
    Input impedance: >69kΩ