safety switching devices evaluation device fo r two-hand actuators pi 0122-0603 e snz 4052k, snz 4052k-a 1/4 en 60204-1 stop category 0 en 954-1 safety category 4 ? basic unit according to din en 574 typ iiic, iec 204 - 1 and en 954 - 1 ? two-channel control , 1 no and 1 nc contact for each channel ? monitoring of the synchronous activation ? for safety categorie 4 and stop category 0 ? 2 no safety contacts, 1 nc control contact ? rated voltage in the e-stop circuit: 24 v dc device style snz 4052k with screw terminals snz 4052k-a with plug-in terminals devices available for ac/dc 24 v, ac 115 - 120 v or ac 230 v rated power supply. device and function description the device complies with the en 57 4 type iiic requirements. the safety behavior of the device is designed ac cording to the performance level for safety category 4 (en 954 - 1). the device is single-fault safe and has self- monitoring. synchronous activation of both actuators (two-hand momentary- contact or protective gate switches) is monitored. each of the two two-hand momentary-contact switches is connect ed to the device with a normally open contact and a normally closed contact. t he technical design of the input circuit provides cross and ground-fault monitoring. the output function is designed to be positively driven with two normally o pen contacts as enabling contacts, and with one normally closed contact as control contact. after the supply voltage is applied to terminals a1/a2 and with closed feed- back circuit (terminals y1/y2), the enable current paths are opened by activat- ing simultaneously the actuators (s1 and s2). both momentary contact switches must be activated synchronously within 0,5 s for the output contacts to be enabled. if only one of the two hand switches is releas ed, the device is immediately de-excited. the enabling c urrent paths open. the relay can be restarted only after both act uator elements have returned to their initial position (e.g. the two-hand momentary contac t switches have been released) and the feedback circuit is closed again. the feedback circuit should only be opened again after both actuators are activated. otherwise the device stays in its off- position. the current stat us of the device is indicated by three leds: applica- tion of the supply voltage with led suppl y, activation of both actuators with led k1 and with led k 2 in addition in case of synchronous activation. proper use machines whose operation requires re peated motion of the hands into the hazardous zone may be operated with this relay. notes ? the safety category according to en 954 - 1 also depends from the external circuit, the choice of the control station and is location on the machine. ? insulation on external wiring should not be cut back more than 8 mm. ? to multiply the enabling current pat hs, the expansion units or external contactive elements with positiv ely driven contacts can be used. ? external fuse protection for the rela y and the contacts should not exceed 6 a type gg. please observe instructions from safety authorities.
safety switching devices evaluation device fo r two-hand actuators pi 0122-0603 e snz 4052k, snz 4052k-a 2/4 function diagram a1 / a2 power supply, led supply actuator s1 actuator s2 k1, led k1 k2, led k2 synchronous monitoring y1 / y2 feed back 13/14, 23/24 31/32 (1) enabled in case of synchronous activation of both actuators. (2) enabled in case of synchronous activation of both actuators. if on of the actuators is released the unit is immedately disabled. the unit can be enabl ed again only after both actuators have been released. (3) not enabled in case of asynchronous activation. t a = response time, t r = release time, t w = recovery time, t s = synchronous monitoring time connection diagrams snz 4052k / k-a ac/dc 24 v snz 4052k / k-a ac 115 v / ac 230 v die klemmen y12, y24 und y14, y22 sind jeweils auf einem klemm- punkt zusammengefasst. 1 rckfhrkreis zur berwachung externer schtze 2 stellteil s 1 3 stellteil s 2 4 2 freigabestrompfade 1 melde?ffner 5 spannungsversorgung
safety switching devices evaluation device fo r two-hand actuators pi 0122-0603 e snz 4052k, snz 4052k-a 3/4 application example two-hand control acc. to type iii c safety category 4 with external contact expansion. technical data supply rated voltage u n ac/dc 24 v ac 115 - 120 v ac 230 v rated power dc 2,4 w ac 1,9 w / 3,1 va 2,2 w / 2,4 va 2,2 w / 2,4 va residual ripple 2,4 v ss - - rated frequency 50 ... 60 hz opearting range 0,85 ... 1,1 x u n isolation between supply circuit / control circuit no yes yes control circuit internal operating voltage (y12 -- y14 or y22 -- y24 and y1), used only for the supply of the i nputs y11 -- y21 and y2 dc 24 v fusing ptc resistor transformer short circuit proof transformer short circuit proof response time t a k1, k2 40 ms release time t r < 50 ms simultaneity check t s 500 ms recovery time t w 250 ms output circuit contacts 2 no safety contacts pos itively driven, 1 nc control contact switching voltage u n ac/dc 230 v max. rated current i n per contact 6 a max. total current for all contacts 12 a 8 a 8 a application category according to iec 947 - 5 - 1 ac--15 ue 230 v ac, ie 4 a (360 sch/h) dc--13 ue 24 v dc, ie 4 a (360 sch/h) short-circuit protection, max. fuse element type gg 6 a general data creepage and clearance acc. din vde 0110 part 1 : 04.97 rated withstand voltage 4 kv contamination level: internal/external 2 / 3 test voltage ac 300 v protection degree housing / terminals acc. to din vde 0470 part 1 ip 40 / ip 20
safety switching devices evaluation device fo r two-hand actuators pi 0122-0603 e snz 4052k, snz 4052k-a 4/4 ambient temperature working range / storage ra nge -25 ... +55 / -25 ... +75 c weight 0,2 kg 0,25 kg 0,25 kg terminals and connection single-core or finely stranded 1 x 0.14 mm2 to 2.5 mm2 2 x 0.14 mm2 to 0.75 mm2 stripping length max. 8 mm finely stranded with wire-end ferrule to din 46228 1 x 0. 25 mm2 to 2.5 mm2 2 x 0.25 mm2 to 0.5 mm2 max. tightening torque 0.5 to 0.6 nm for ul and csa approvals conductor sizes awg 18-16 use only cu lines max. tightening torque 0.79 in-lbs abmessungen / dimension diagram / dimensions snz 4052 k snz 4052 k- a assembly 1 attach relay to din rail. 2 press the relay carefully onto the din rail (in direction of arrow) until it locks into place. disassembly 3 push relay down (in direction of arrow) 4 release relay and remove it from the din rail (see arrow) subject to changes schleicher electronic gmbh & co. kg pichelswerderstra?e 3-5 d-13597 berlin germany phone +49.30.33005.0 fax +49.30.33005.344 hotline +49.30.33005.304 internet: http://www.schleicher-de.com email: info@schleicher-de.com
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