Evco EV3 200 WEB - 4. Electrical Connections; 4.1 Wiring Best Practices

1143W24E4.00 · EV3 200 Web 03/2021
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4. ELECTRICAL CONNECTIONS
4.1 WIRING BEST PRACTICES
The following information describes the wiring guidelines and best practices which should be observed when using the
equipment described in this manual.
DANGER
RISK OF ELECTRIC SHOCK, EXPLOSION OR ELECTRIC ARC
• Only use electrically insulated measuring devices and equipment.
• Do not install the equipment while the power supply is connected.
• Switchoffallequipment,includingconnecteddevices,beforeinstallingoruninstallingthedevice.
• Alwaysuseacorrectlycalibratedvoltmetertocheckthesystemisswitchedoff.
• Do not touch the unshielded components or the terminals while they are live.
• Donotopen,disassemble,repairormodifytheproduct.
• Do not expose the equipment to liquids or chemicals.
• Before applying voltage to the equipment:
• Makesureallprotectiveelements,suchascovers,hatchesandgrilles,arefittedand/orclosed.
• Checkallwiringconnections.
4.1.1 Wiring guidelines
Whenwiringthecontrollers,observethefollowinginstructions:
• TheI/Oandcommunicationwiringmustbekeptseparatefromthepowersupplywiring.Thesetwotypesofwiringmust
be routed in separate ducts.
• Makesuretheoperatingenvironmentandconditionsfallwithinthespeciedvalues.
• Usewireswiththecorrectdiameter,suitedtothevoltageandcurrentrequirements.
• Use copper conductors (compulsory).
• Use shielded twisted pair cables for analogue/digital I/O connections.
Use correctly earthed shielded cables for all analogue inputs or outputs and for communication connections. If shielded cables
arenotusedfortheseconnections,electromagneticinterferencecouldcausethesignaltodeteriorate.Deterioratedsignals
can lead to unpredictable operation of the controller or modules and connected equipment.
WARNING
MALFUNCTIONING OF THE EQUIPMENT
• Performthewiringcarefully,incompliancewithelectromagneticcompatibilityandsafetyrequirements.
• Makesurethewiringiscorrectfortheapplication.
• Use shielded cables for all I/O signal and communication cables.
• Minimise the length of the connections as much as possible and avoid winding the cables around electrically connected
parts.
• Thesignalcables(analogueanddigitalinputs,communicationandcorrespondingpowersupplies),powercablesandpower
supply cables for the device must be routed separately.
• Beforeapplyingthepowersupply,checkallthewiringconnections.
• Usetherequiredsafetyinterlockswherepersonneland/orequipmenthazardsexist.
• Installandoperatethisequipmentinacabinetappropriatelyratedforitsintendedenvironmentandsecuredbyakeyedor
tooledlockingmechanism.
• Power line and output circuits must be wired and fused in compliance with local and national regulatory requirements for
the rated current and voltage of the particular equipment.
• Do not use this equipment in safety-critical machine functions.
• Donotdisassemble,repairormodifythisequipment.
• Do not connect wires to unused terminals and/or to terminals labelled “No connection (N.C.)”.
4.1.2 Fixed screw terminal blocks guidelines
Suitable wiring for power supply and I/O SELV
Passo 5,08 mm (0.199 in.)
Ø 3.5 mm (0.14 in.)
mm
2
AWG
0.2…2.5
24…14
0.2…2.5
24…14
0.25…2.5
22...14
2 x 0.25…1
2 x 22…18
2 x 0.2…1.5
2 x 24…16
2 x 0.2…1
2 x 24…18
2 x 0.5...1.5
2 x 20...16
mm
in.
7
0.28
C
0.5...0.6
4.42...5.31
N•m
lb-in
0.25…2.5
22...14
Fig. 4. Suitable wiring for power supply and I/O SELV