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