operation permissible in switchgear cabinet with degree of protection ip 54 only ! the contactor safety combinations can be used in emergency-off circuits and for monitoring protective devices (e.g. protective screens) . the internal control circuit of the contactor safety combination is designed a ccording to din en 60204, part 1 (vde 0113, part 1), para. 9.4.2.2, so that in the case of a fault in one of the contactor relays the function of the safety circuit is maintained. the supply voltage must meet the requirements of the din en 60204 (vde 0113, part 1) (the terminals ?l-/n; a2? must be conne c - ted to that side of the control current circuit which is linked to the protective conductor system).the contacts of the contactor relays are checked for pr o - per opening and closing in every on and off cycle of the machine to be swi t - ched. this is, for instance, done b y - connecting and disconnecting the control voltage with the main switch , - activating and deactivating the emergency-off uni t - opening and closing of the protective screen . for circuit diagrams, se e : fig. iii : emergency-off circui t fig. iv : protective screen monitoring (a=door open; b=door closed ) fig. v : emergency-off with expansion module (no delay ) fig. vi : emergency-off with time-delay modul e for internal circuit diagrams, see low-voltage control equipment, switchgear and systems catalog . note : the units are tested by the bia. the external control circuit conne c - tions are shown for example only; the actual connections must be defined by the user on the basis of a risk assessment . further applications available upon request . for dimension drawings se e fig. i (dimensions in mm) . minimum clearances from earthed parts on the sides: 3 mm (see fig. i i a ) . connection see fig. i i b . cover the contactor safety combination during installation if foreign particles, such as swarf, can fall onto it. install contactor safety comb i - nations in a housing if they are exposed to dirt, dust or aggressive atmospheres . permissible operating position: an y cleaning : remove dust with a vacuum cleane r operating states of the unit : ?ready? (3tk2803/2804) indicates that voltage is applied to the unit, pr o - vided that the contacts of the emergency off pushbutton or door safety switch are closed . ?on? lights up, when the on button is pressed and the enabling circuits are switched through . ?feedbackcircuit? (3tk29.3/2907) lights up when the on button is pr e ssed and the enabling circuits of the expansion modules are switched t h rough . warning : hazardous voltag e can cause electrical shoc k and burns . disconnect power before proceedin g with any work on this equipment . applicatio n functions and connection s installatio n operatio n permissible ambient temperature t u : - operation -25 to +55 c - storage -55 to +80 c for 3tk 29.3 -25 to +80 c degree of protection ip 2 0 insulation coordination to din vde 0110 part 1 and part 2 (01.89) : clearances in air and creepage paths: 4 kv/ 3 (control circuit: 1.5 kv/3 ) rated insulations voltage u i = 400 v (for control circuit u i = 250 v ) rated impulse withstand voltage u im p = 4 k v (for control circuit u im p = 1.5 kv ) short-circuit protection for signal circuit and enable circuit : no-weld fuse protection at short-ircuit current: i k 3 1 k a - fuse links low-voltage hrc, neozed or diaze d gl (gg) 6 a quick response 10 a fusing of contactor safety combination : - m.c.b., type g time-lag/quick-resp. 6 a - m.c.b., type a, b, c 6 a - protective circuit-breaker terminal s type 8 wa1011 6 a be sure to fit the specified fuses. otherwise safe interruption in the event of a fault cannot be guaranteed . for further data and order nos. for accessories see catalog nsk . technische date n utilization categor y as per din vde 0660, part 100 (07.92 ) iec 60947-1: 198 8 rate d operatio n voltag e u e rated operating curren t i e 40 c ( i e 55 c ) ac-1/ac-1 2 6 a 6 a ac-1 5 250 v 400 v 4 a (4 a ) 3 a (3 a ) dc-1 3 24 v 220 v 6 a (6 a ) 0.5 a (0.5 a ) rated powe r ac- 3 230 v 400 v 0.55 kw 0.55 k w 1.1 kw 1.1 k w values as per din iec 60255 / vde 0435 (09.62) : continuous current i t h 10 a (8 a ) making capacity at : p.f. = 0.7 to 1 ac 230 v 10 a (8 a ) resistiv e dc 24 v 10 a (8 a ) s max. 30 a ( s max. 24 a ) contactor safety combination 3tk2803, 3tk280 4 3tk2907, 3tk29.3 din en 60439 part 1/ vde 0660 part 500 (04.94 ) instruction s order no.: 3zx1012-0tk20-1aa 2 english 2
35 77,2 55 75 96,6 110 m3,5 ? 4,8 netz power kanal 1 channel 1 3tk28/29 5 148 kanal 2 channel 2 i ii a iii a iv a 3rb1900-0b 3tk28/29 3 3 ein on bereit ready 2x(1 ... 2,5 mm 2 ) 1x4 mm 2 10 2x(0,75 ... 1,5 mm 2 ) 0,8x5 ... 6 mm 0,8 ... 1,2 nm/7 ... 11 lb.in ii b l+ l- 3tk2804 l+ x 1 l- x 3 x 5 x 2 x 4 x 6 f1 f1 l+ l- 3tk2803 l+ x 1 x 3 l- x 2 x 4 x 6 l+ l- 3tk2804 l+ x 1 x 3 x 5 l- x 2 x 4 x 6 a b f1 l+ l- 3tk2803 l+ x 1 x 5 l- x 2 x 4 x 6 a b f1 iii b iv b
rckfhrkreis feedback circuit l+ l - 3tk28 l+ x 1 x 3 x 5 l- x2 x4 x6 13 no 14 ein on bereit ready a1 a2 x8 74 84 94 104 114 124 134 x7 73 83 93 103 113 123 133 3tk2907 freigabe enable 133 123 113 103 73 83 93 134 124 74 84 94 104 114 3tk2804 f1 rckfhrkreis feedback circuit 3tk28 l+ x 1 x 3 x 5 l- x 2 x 4 x 6 13 14 ein on bereit ready a1 a2 x8 y2 z1 z2 z3 78 88 98 77 87 97 3tk29.3 freigabe enable 77 87 97 78 88 98 l+ l - t 4 t 3 t 2 f1 x 7 3tk2804 v v i 3tk292 3 0,5 - 2 s 3tk294 3 1 - 4 s 3tk298 3 2 - 8 s t 1 0, 5 1 2 t 2 1 2 4 t 3 1, 5 3 6 t 4 2 4 8 d t 1,0 u s - 35 ... + 65 % 0,8 ... 1,1 u s - 50 ... + 75 % technische ?nderungen vorbehalten . subject to change without prior notice . ? siemens ag 199 5 bestell-nr./order no.: 3zx1012-0tk20-1aa 2 printed in the federal republic of german y technical support: tel: ++49 (0) 9131-7-43833 (8 - 17 mez) fax: ++49 (0) 9131-7-42899 e-mail: nst.technical-support@erl7.siemens.d e internet: www.ad.siemens.de/suppor t
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