KOLLMORGEN AKD-T00306-NBAN-0000 INPUT SERVO DRIVE

KOLLMORGEN AKD-T00306-NBAN-0000 INPUT SERVO DRIVE

Functional description

WhenSTOfunction(SafeTorqueOff)is not needed, thentheinput STOmust beconnecteddirectly with+24V.

Thefunction is thenbypassedandcannot beused. If theSTOfunctionis inuse, thentheinput STOmust becon

nectedtotheexit of asecurity control orasafety relay, whichat least meets therequirements of PLd, CAT 3

according to ISO13849(connectiondiagram: => p. 57). Possiblestates of thedrivereferringtoSTOfunction:

WhenSTOfunctionis engagedduringoperationby separatinginput STOfrom 24V, themotorslows downwith

out control andthedrive displays thefault F602

Signal diagram (sequence)

Thediagram below shows how touseSTOfunctionforasafedrivestopandfault freeoperationof thedrive.

1. Brakethedriveinacontrolledmanner(speedsetpoint = 0V).

2. Whenspeed=0rpm,disablethedrive(Enable= 0V).

3. ActivatetheSTOfunction(STO= 0V)

Control circuit (example)

Theexampleshowsacontrolcircuit withtwoseparatedwork areasconnectedtooneemergencystopcircuit

(mainssupply circuit:=> p.58). Foreachworkarea, "safestop" ofthedrivesis switchedby aprotectivescreen.

Thesafety switchgearsusedintheexamplearemanufacturedby Pilzandfulfillat leastthePLdaccordingtoISO

13849-1orSILCL2accordingtoIEC62061. Safetyswitchgears fromothermanufacturersmay alsobeused

First Method:

1. Stopdrive, withsetpoint 0V. Keepdriveenabled.

DANGER:Do notenter hazardous area!

2. ActivatetheSTOfunctionforexampleby openingprotectivescreen(voltageat X1/30V).

3. Thefault contact opens, thenet contactorreleases, andthedrivedisplays fault F602.

Second Method:

1. Stopall drives, withsetpoint 0V, disabledrive.

2. ActivatetheSTOfunction, forexample, by openingprotectivescreen(voltageat X1/30V)

3. Thedrivedisplays warningn602.

6.17.8.4 Mains supply circuit (example)

Corresponding control circuit => p. 57.

Shock-hazard Protection

6.18.1 Leakage Current

Leakagecurrent viathePE conductorresults from thecombinationof equipment andcableleakagecurrents.

Theleakagecurrent frequency patternincludes anumberof frequencies, whereby theresidual-current circuit

breakers definitively evaluate the 50 Hz current. Forthis reason, the leakage current cannot bemeasuredusinga

conventional multimeter.

As aruleof thumb, thefollowingassumptioncanbemadeforleakagecurrent onourlow-capacity cables at a

mains voltageof 400V, dependingontheclock frequency of theoutput stage:

I

leak = n x 20 mA + L x1mA/mat8kHzclockfrequencyattheoutput stage

leak = n x 20 mA + L x2mA/mata16kHzclockfrequencyattheoutput stage

(whereIleak=leakage current, n=numberof drives, L=lengthof motorcable)

At othermains voltageratings, theleakagecurrent varies inproportion to the voltage.

Example:2x drives + a25mmotorcableat aclock frequency of 8kHz:

2x 20mA+25mx1mA/m=65mAleakagecurrent.

Thefollowing measures canbeusedtominimizeleakagecurrents:

l Reducethelengthof theenginecable.

l Uselow-capacity cables (=> p. 40).

6.18.2 Residual Current Protective Device (RCD)

In conformity with IEC 60364-4-41–Regulations forinstallation andIEC 60204–Electrical equipment of machin

ery, residual current protective devices (RCDs) canbeusedprovidedtherequisiteregulations arecompliedwith.

TheAKDis a3-phasesystemwithaB6bridge. Therefore, RCDs whicharesensitivetoall currents must be

usedinordertodetect any DC fault current. Refertothechapterabovefortheruleof thumbfordeterminingthe

leakage current.

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