mini8 multi-loop controller. 2 eurotherm business group mini 8 – what is it? multi-loop(4,8,16)...
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2
Eurotherm Business Group
Mini 8 – What is it?
•Multi-loop(4,8,16) PID controller
•8-32 Channel data acquisition
•Design targeted at economic multi-loop control
•However its feature set = 16 loop 3500
>Can satisfy demanding applications
•Open communications to PLCs/PCs
•Small compact unit
>125W x 105H x 125D
>DIN rail or bulkhead mounting
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Eurotherm Business Group
Basic Options • Power Supply
>18Vdc to 28Vdc• Standard I/O
>2off 24Vdc digital input>2off Change-over relays, rated 1A, 42V max
• Communications>Modbus RTU, 3 or 5-wire EIA485>DeviceNet>Profibus DP>Ethernet, Modbus TCP>CANopen>Additional Modbus RTU EIA232 for config/network
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Eurotherm Business Group
Input & Output Modules• 4 I/O slots
>Modules can be changed by technician
• 4 or 8 Ch.TC input
>Range –77mV to +77mV
>Any TC input, linear mV/mA with scaling, custom download
>42Vac/dc channel-channel isolation
>Max 4 per Mini8
• 4 Ch. RTD input
>Max 4 per Mini8
>2, 3 or 4-wire, Linear mV/mA with scaling
>42Vac/dc channel-channel isolation
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Eurotherm Business Group
Input & Output Modules• 8 Ch. digital Input
>24Vdc input>42 Vac/dc channel-channel isolation>Max 4 per Mini8
• 8 Ch. logic output>OnOff or time proportioned>42 Vac/dc isolation to system, no channel isolation>Max 4 per Mini8
• 8 Ch. relay output>OnOff or time proportioned>264 Vac channel-channel isolation>Max 2 per Mini8, slots 2 & 3
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Eurotherm Business Group
Input & Output Modules
• 3 Ch. current transformer input
>0-50mA ac current
>8 loops heater failure detection
>Isolation by CTs
>Max 1 per Mini8, supports 8 loops
• 4 or 8 Ch. mA output
>0-20mA/4-20mA
>Max 360R load
>42Vac/dc channel-channel isolation
>Max 1 per Mini8, slot 4 only
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Eurotherm Business Group
Control Options
• 4, 8 or 16 Control loops>PID, ON/OFF>Dual channel OP (heat/cool)
• Advanced control features>Similar functions to 3500>Flexible wiring of function blocks
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Eurotherm Business Group
Heater Failure Detection•Partial load failure, over current, SSR short/open circuit
>Rapid indication of fault•Automatic load cycling algorithm for up to 8-loops
>Selectable cycle time: 1s-60s>Sequentially tests each heater in turn
•Auto or manual commissioning•Refer to technical note AP1007 for more info
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Eurotherm Business Group
Setpoint Programmer•8 Programmers
>Each programmer has 1x16 segment profile>Profile SP can be wired to multiple loops>8 Profiled SPs are possible>8 Event outputs per profile
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Eurotherm Business Group
Maths, Logic and Timing Functions•Maths functions
>2 input x 24 >8 input multiplexor x 4>User value x 32>Multiple input x 4
•Logic functions>2 input x 24>8 input x 8
•Timing functions>Real time clock>Timer x 8>Counter x 2>Totaliser x 2
•Other functions include>Custom Linearisation x 2>Switchover>Plus others
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Eurotherm Business Group
Recipes•8 Sets, each set can a given meaningful name•24 Tags(parameters) per set•Typical example of Tags; Control SPs, Alarm
SPs, PID values etc
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Eurotherm Business Group
Plastics Application(EC8)•Standard configuration for use with VT505 or
Specview>8 PID loops
-TC input, Logic heat/cool outputs>Heater failure detection for 8 loops>Alarm management>Recipes
• Ideal for>Extrusion>Injection moulding>Thermoforming>Auxiliary equipment
-Chillers, dryers etc
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