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UG 6946 / 25.11.19 en / 188A

The UG 6946 has to be connected according to connection examples 
or in a similar way. The connection of DC- motors is made as with single 
phase AC-motors.

L1 - L2 - L3

The measuring wires L1-L2-L3 have to be connected directly to the win-
dings of the monitored motor (not via transformers) in order to provide a 
correct broken wire detection for the connection wires and motor windings.
The motor windings must not be disconnected from the measuring wi-
res by motor contactors, because broken wire detection is activated and 
standstill monitoring is disabled.
 
Interference to the measuring wires should be avoided as no standstill 
may be detected by the UG 6946. If possible the measuring wires should 
be run separately from the motor wires or screened wires should be used. 
In this case the screen can be connected at the motor side.

A1 - A2

Connection of the auxiliary supply, recommended fuse : 2A.

13-14, 23-24

Safety output contacts, connection according to the connection examples 
or similar.
Recommended fuse: 5 A fast acting, to avoid welding of  the contacts in 
the case of external wiring or component failures. See also technical data.

X1 - X2 (feedback circuit)

Connection of NC contacts of external components or contactors for con-
tact re-enforcement, must be linked if not used.

X2 - X3

Connection for manual or auto reset, connection is made according to the 
required application. When monitoring DC motors or in the case of DC-
braking the broken wire / offset failure will be shown during operation. In 
this case the terminals must be linked because if storing the failure would 
not allow activation of the safety contacts at standstill.

MU1, MU2 (at variant /xx1 only)

Using the inputs MU1 and MU2 the standstill detection could be muted.
The signal on the inputs must be between DC 10 and 26.4 V against A2. If 
muting is selected on these inputs the standstill detection is disabled. The output 
relays are energised and monitoring of broken wire, offset and simultaneity of 
the measuring signals is not operated.

MU1 MU2 Mode
0 0 Muting 

deactivated

1 1 Muting 

activated

WARNING

  Attention

The terminals X1-X2-X3 have electrical connections to the measu-
ring inputs L1-L2-L3. Volt free contacts must be used for bridging. 
If terminal X3 should be controlled by a PLC via an interface relay 
this must have the necessary insulation between the motor voltage 
(measuring input) and PLC potential.

Connection of UG 6946

Motors with switched windings

(e.g. star delta starters, reversing circuits, multi speed motors)

With these applications please make sure, that the measuring inputs must 
be linked via the motor windings. An open connection will result in broken 
wire indication and disable the safety contacts.
When connecting the UG 6946 to a 3-phase motor with star delta starter 
the star contactor must be energized while the motor is switched off, in 
order to achieve closed circuits between L1-L2-L3 via the motor windings.
 
If it is not possible to switch in the star contactor after the motor is swit-
ched off, the measuring inputs of the UG 6946 have to be connected 
like a single phase connection. L2-L3 are bridged and connected to one 
end of a motor winding and L1 to the other end of the same winding. 

For reversing circuits and multi speed motors please follow the same pro-
cedure.

If in a 3-phase connection of UG 6946 windings are switched over, and 
the interruptions of the measuring circuits are longer then 2 s, the stand-
still monitor detects broken wire. In order not to store this failure, the unit 
should work with auto reset.

Operation with DC motors

The UG 6946 can be used on DC motors if these generate a remanence 
voltage during run down.

The connection is made similar as with a single phase motor.

As the remanence voltage in this case is normally a DC voltage the unit 
will detect a broken wire / offset failure and indicate it on LED „ERR“.  
Taking this in mind and operating the unit with auto reset for these failures 
the unit can be used for safety standstill monitoring.

Operation with electronic motor controller

(inverters, DC-brakes)

The operation of UG 6946 to detect standstill on motors with electronic 
motor control is possible, if the output voltage of the motor controller drops 
under the adjusted response value on standstill. (No position control on 
inverters, no DC voltage on brakes after standstill).

If the inverter produces a DC offset or a DC brake is active, an offset or 
broken wire failure is indicated on LED „ERR“. This error resets automati-
cally if on terminals X2-X3 automatic reset is selected.

When there are inverters in the installation it is recommended to use 
screened measuring wires to the motor. The screen can be connected 
to the motor.

!

 

Attention

If the motor current is run down by inverters or softstop modules in a 
slow way the motor may be de-magnetised. It is necessary to check if 
the remaining remanence voltage is sufficient to guarantee a correct 
and safe standstill monitoring. At high frequencies an increasing 
damping of the measuring inputs has to be taken into account (see 
technical data  Measuring input „response value dependant on 
frequency“).

Operation Notes

Summary of Contents for 0068412

Page 1: ...MASTER S Stillstandsw chter UG 6946 0277347 Datenblatt Betriebsanleitung DEUTSCH E DOLD S HNE KG Postfach 1251 78114 Furtwangen Deutschland Telefon 49 7723 6540 Fax 49 7723 654356 dold relays dold com...

Page 2: ...n 6 Ger te und Funktionsbeschreibung 6 Ger te und Funktionsbeschreibung 7 Anschluss des UG 6946 8 Betriebshinweise 8 Inbetriebnahme und Einstellung 9 Technische Daten 10 Standardtype 10 Bestellbeispie...

Page 3: ...en Null gefahren kann eine Entmagnetisierung des Motors stattfinden Es ist dann zu pr fen ob die verbleibende Remanenzspannung ausreicht um eine korrekte Stillstandserkennung zu gew hrleisten Bei hohe...

Page 4: ...4 UG 6946 25 11 19 de 188A...

Page 5: ...en Motoren und Anwendungen anpas senzuk nnen istdieSpannungsschwelleUan unterhalbderdasUG6946 den Stillstand erkennt einstellbar Ebenfalls einstellbar ist die Zeitdauer f r die Uan unterschritten werd...

Page 6: ...ies als Stillstand und schaltet wenn die Klemmen des R ckf hrkreises X1 X2 geschlossen sind nach der eingestellten Stillstandszeit ts die sicherheitsgerichteten Ausgangskontakte 13 14 und 23 24 ein Al...

Page 7: ...n X1 und X2 keine weiteren Fehler mehr vorliegen bleibt der Fehler R ckf hrkreis erhalten und die Ausg nge werden weiterhin nicht freigegeben Wird der R ckf hrkreis jetzt geschlossen und ist keine Spe...

Page 8: ...m Motor angeschlossen wird Zur Beachtung Wird durch Frequenzumrichter oder Sanftauslaufger te der Motorstrom allm hlich gegen Null heruntergefahren kann eine Entmagnetisierung des Motors stattfinden E...

Page 9: ...t ts blinkt die LED OUT gr n Wenn die Stillstandsfreigabe erst bei einer sehr niedrigen Umdrehungszahl des Motors erfolgen soll wird man meist Uan auf Minimum einstellen Durch eine vergr erte Einstell...

Page 10: ...ting Baubreite 22 5 mm Standardtype Eingang L1 L2 L3 Mess Motorspannung max AC 690 V Eingangswiderst nde 500 k Ansprechwert Uan 20 mV 400 mV einstellbar oder 0 2 4 V einstellbar Frequenzabh ngigkeit d...

Page 11: ...pfaden I I 1 2 I I I 2 2 2 1 2 Ger t angereiht mit Fremderw rmung durch Ger te gleicher Last 2 Kontaktreihen 1A 2x1 A 2A 2 2 2 Max Strom bei 35 C 2000 m bzw 25 C 4000 m ber Ger t freistehend 2 Kontakt...

Page 12: ...Gleichspannung erzeugen Das Ger t enth lt keine Teile die einer Wartung bed rfen Bei vorliegenden Fehlern das Ger t nicht ffnen sondern an den Hersteller zur Reparatur schicken Vorgehen bei St rungen...

Page 13: ...1 L2 L3 PE K4 K5 L1 L2 L3 X1 X2 X3 UG6946 M 3 M11887_a 0V DC24V 13 23 A1 14 24 A2 K4 K5 Motorsch tz MU1 MU2 Muting A1 On K4 K4 S11 S12 S22 13 23 33 41 S21 S33 S34 14 24 34 42 A2 Entriegelung Unlock F1...

Page 14: ...4 A2 K4 U1 W2 V1 U2 W1 V2 K5 N N DC24V 0V MU1 MU2 M11883 L1 L2 L3 N Aus F Ein Sicherung Hauptschalter N d d 18 A1 A2 28 17 27 d Stern Dreieck Zeitrelais N Netzsch tz Sternsch tz Dreiecksch tz K4 K5 UG...

Page 15: ...tandstill Monitor UG 6946 Datasheet Operating Instructions ENGLISH E DOLD S HNE KG P O Box 1251 D 78114 Furtwangen Germany Tel 49 7723 6540 Fax 49 7723 654356 dold relays dold com www dold com Transla...

Page 16: ...ndicators 20 Function 20 Function 21 Connection of UG 6946 22 Operation Notes 22 Setup and Setting 23 Technical Data 24 Standard Type 24 Ordering Example 24 Characteristic 24 Troubleshooting 25 Mainte...

Page 17: ...the motor current is run down slowly using a frequency inverter or a softstop unit a de magnetisation of the motor can take place It is necessary to check if the remaining remanence voltage is suffici...

Page 18: ...18 UG 6946 25 11 19 en 188A...

Page 19: ...erent types of motors and applications the voltage threshold indicating standstill on UG 6946 is adjustable Also the time delay between detection and energisation of the relay is adjustable standstill...

Page 20: ...rminals X1 X2 of the feedback circuit are bridged and the time delay ts is finished the safety contacts 13 14 and 23 24 close All contact paths have 2 forcibly guided contacts of 2 safety relays wired...

Page 21: ...failures are present the feedback circuit failure remains active and the outputs remain disabled If the feedback circuit is now closed and the unit is on auto reset for exter nal failures see failure...

Page 22: ...r delta starters reversing circuits multi speed motors With these applications please make sure that the measuring inputs must be linked via the motor windings An open connection will result in broken...

Page 23: ...n also be avoided by slightly increasing Uan During time delay ts the LED OUT flashes green If standstill detection shall only take place at very low speed of the motor Uan is set normally to minimum...

Page 24: ...mV Auxiliary voltage UH DC 24 V Standstill time ts 0 2 6 s Muting without muting Width 22 5 mm Standard Type Input L1 L2 L3 Measuring Motor voltage max AC 690 V Input resistance 500 k Response value U...

Page 25: ...t paths I I 1 2 I I I 2 2 2 1 2 device mounted without distance heated by devices with same load max current at over 1A 2x1 A 2A 2 contact path 2 2 2 35 C 2000 m or 25 C 4000 m device free standing ma...

Page 26: ...supply off and on The reset also takes place when both input signals rise above Uan e g when starting the motor If the simultaneity failure remains active after start of the motor e g because of short...

Page 27: ...sse z ro UG6946 Not Aus Open E Stop Auf L1 K4 L2 L3 N DC24V 0V Not Aus Modul E Stop Modul Module d arr t d urgence LG5925 M11885_b A1 31 32 13 14 X1 X2 A2 L1 L2 L3 M 3 D verrouillage Arr t d urgence O...

Page 28: ...BC7936N 13 23 L2 L1 L3 A1 14 24 A2 K4 U1 W2 V1 U2 W1 V2 K5 N N DC24V 0V MU1 MU2 M12023 L1 L2 L3 N off F on fuse main switch N d d 18 A1 A2 28 17 27 d star delta timer N mains contactor star contactor...

Page 29: ...tecteur de vitesse nulle UG 6946 Fiche Technique Manuel d utilisation FRAN AIS E DOLD S HNE KG B P 1251 78114 Furtwangen Allemagne T l 49 7723 6540 Fax 49 7723 654356 dold relays dold com www dold com...

Page 30: ...ent 34 Descriptif de l appareil et du fonctionnement 35 Branchement du d tecteur UG 6946 36 Conseils d exploitation 36 Mise en service et r glage 37 Caract ristiques techniques 38 Versions standard 38...

Page 31: ...rs de 0 par l utilisation de variateurs de fr quence ou de d marreurs ceci peut provoquer la d magnetisation du moteur Il faut alors v rifier que la tension r manente est encore suffisante pour d tect...

Page 32: ...32 UG 6946 25 11 19 fr 188A...

Page 33: ...relais de sortie est alors activ Pour pouvoir adapter l appareil la plus grande vari t de moteurs et d utilisations ce seuil de tension r siduelle Uan est r glable La temporisation de r action du rela...

Page 34: ...r ponse programm Uan le module UG 6946 l interpr te comme un arr t et quand les bornes du circuit de retour X1 X2 sont ferm es enclenche les contacts de s curit de sortie 13 14 et 23 24 la fin du tem...

Page 35: ...R affiche un clignotement de d faut selon le code 4 M me si ensuite les deux entr es de mesure indiquent des signaux Uan et que mise part l absence de liaison entre X1 et X2 aucun autre d faut ne pers...

Page 36: ...e mesure L1 L2 L3 du UG 6946 soient toujours reli s par les enroulements du moteur sinon la signalisation de d faut rupture de conducteur emp cherait la lib ration des contacts de sortie En cas de rac...

Page 37: ...intervenir qu apr s un tr s faible temps d inversion du moteur on r gle la plupart du temps Uan au minimum Une augmentation du temps ts peut alors viter une ventuelle succession d enclenchements et de...

Page 38: ...emps d arr t ts 0 2 6 s Muting sans muting Largeur utile 22 5 mm Versions standard Entr e L1 L2 L3 Tension de mesure moteur AC 690 V max R sistance d entr e 500 k seuil de r ponse Uan 20 mV 400 mV ou...

Page 39: ...I I 2 2 2 1 2 appareils accol s chauffement externe suppl mentaire par d autres appareils adjacents courant max 35 C des 2 lignes de contacts A 2x1 A 2A 1 2 2 2 2000 m resp 25 C 4000 m par appareil a...

Page 40: ...ension auxiliaire Ce d faut dispara t aussi automatiquement au red marrage du moteur quand les deux entr es de mesure L2 et L3 re oivent simultan ment des signaux de mesure sup rieurs Uan Si le d faut...

Page 41: ...G6946 Not Aus Open E Stop Auf L1 K4 L2 L3 N DC24V 0V Not Aus Modul E Stop Modul Module d arr t d urgence LG5925 M11885_b A1 31 32 13 14 X1 X2 A2 L1 L2 L3 M 3 D verrouillage Arr t d urgence Ouvert MU1...

Page 42: ...13 23 L2 L1 L3 A1 14 24 A2 K4 U1 W2 V1 U2 W1 V2 K5 N N DC24V 0V MU1 MU2 M12024 L1 L2 L3 N arr t F marche Fusible Sectionneur g n ral N d d 18 A1 A2 28 17 27 d relais toile triangle N contacteur de li...

Page 43: ...24 to 12 2 x 0 25 1 0 mm2 2 x AWG 24 to 18 A 10 mm 1 x 0 25 2 5 mm2 1 x AWG 24 to 12 2 x 0 25 1 5 mm2 mit TWIN Aderendh lse M10250 A A 7 mm 1 x 0 2 2 5 mm2 1 x AWG 24 to 12 2 x 0 2 1 5 mm2 2 x AWG 24...

Page 44: ...t 3 einmal in 3 Monaten once in 3 months une fois tous les 3 mois PL d with Cat 3 einmal pro Jahr once per year annuel nach acc to selon IEC EN 62061 IEC EN 61508 SIL CL 3 SIL 3 with HFT 1 einmal in 3...

Page 45: ...45 UG 6946 25 11 19 de en fr 188A DE EG Konformit tserkl rung EN CE Declaration of Conformity FR D claration de conformit europ enne...

Page 46: ...46 UG 6946 25 11 19 de en fr 188A DE Notizen EN Notice FR Note...

Page 47: ...47 UG 6946 25 11 19 de en fr 188A DE Notizen EN Notice FR Note...

Page 48: ...48 UG 6946 25 11 19 de en fr 188A E DOLD S HNE KG D 78114 Furtwangen e mail dold relays dold com internet http www dold com Bregstra e 18 Telefon 0 77 23 654 0 Telefax 0 77 23 654 356...

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