4,5 Safety Switching Devices Emergency-Stop Relay Basic Unit According to EN 60204 - 1 and EN 954 - 1 Feedback Circuit for Monitoring External Contactors SNO 1002 EN 60204 --- 1 For Stop Category 0 Single or Dual Channel E-Stop Circuit is Possible EN 954 --- 1 Safety Category 4 With Monitoring of the RESET Switch Rated Voltage in the E-Stop Control Circuit: 24 V DC 1 1 SNO 1002 For example u Protection of persons and machines u Monitoring of sliding safety screens u Protective measures on industrial robots u In conjunction with programmable logic control systems A1 Y11 Y31 13 23 33 41 53 Y21 A1 Y11 Y31 13 23 33 41 53 Y21 SCHLEICHER SUPPLY + Y31 SNO 1002 Y22 Y12 Y13 ++ + Function K2 K3 Y31 K2 After the supply voltage is applied to terminals A1/A2, and if the E-stop K3 K1 switch is not activated, the relay K1 is energized by the RESET switch. The Y21 K1 K2 K3 contacts of relay K1 trigger the relays K2 and K3. The latter become self- locking through their own contacts. At the same time, the relay contacts Y12 Y13 Y31 Y22 14 24 34 42 54 A2 of K2 and K3 de-energize relay K1. After a drop-out time delay t this R1 Y12 Y13 Y31 Y22 14 24 34 42 54 A2 relay goes over into its off-position. After this switch-on phase, the three enabling current paths, which are intended for the output, are activated (terminals connection for: enabling current paths = 13/14, 23/24,33/34 control contact = 41/42). The fleeting contact 53/54 is closed only during the time when K1 is energized. It can be used , e.g., for indicator purposes or to monitor the RESET-switch (see application ex. A1001). Three LEDs provide a display, and these LEDs are associated with the safety channels and the power supply. If the E-Stop switch is activated, the current leads for the K2 and K3 relays are interrupted. The enabling current paths 13/14, 23/24 and 33/34 at Function Diagram FD 0108 W1 the output are opened and the NC 41/42 is closed. The shunt Y31/Y31 SNO 1002 is used as a support point to simplify the wiring. A1/A2 Power Supply, LED SUPPLY Y12, Y13 E-Stop Y22 Reset K 1, 53/54 Notes K2, K3 13/14, 23/24, 33/34, LED K2, LED K3 u The emergency-stop control circuit can be monitored for a 41/42 ground fault through the PE device connection for AC devices. u The PE connection is omitted for DC devices. t = Response Time A t t t t t t R A R1 A R1 R t = Recovery Time In E-Stop u Devices SNO 1002 and SNO 1004 differ only by their terminal R t t M M t = Recovery Time K1 2 R1 designations. 1 t = Minimum Switch-on Time M u To multiply the enabling current paths, expansion units, or external 1 = E-Stop at Y12, Y13 contactive elements with positively driven contacts must be used. 2 = E-Stop at A1/A2 Connection Diagram Dimension Diagram S 4-6 KS 0282/4 for DIN-Rail acc.to EN 50022 SNO 1002 A1 Y11 Y31 13 23 33 41 53 Y21 Y31 Y31 + Y22 Y12 Y13 + + + A1 A2 104,5 K3 K2 80 5 108,5 82,5 90 K1 + Y21 Approvals Order Example SNO 1002 230 V AC K1 K2 K3 Y11 Rated Voltage Type Y12 Y13 Y31 Y22 14 24 34 42 54 A2 ET 95076 1.16 1.5 Relays and Automation Systems 60 62,5 75 Safety Switching Devices SNO 1002 Application Example Application Example A 1001 A 1003 Two-Channel Emergency-Stop Circuit Single-Channel Emergency-Stop Circuit L1 L1 Feedback Feedback *) A1 Y11 Y31 13 23 33 41 53 Y21 A1 Y11 Y31 13 23 33 41 53 Y21 Y31 Y31 Y31 Y31 + + Y22 Y12 Y13 Y22 Y12 Y13 + + + + + + A1 A2 A1 A2 K3 K3 1 1 K2 K2 K1 + K1 + Y21 Y21 K1 K2 K3 K1 K2 K3 Y11 Y11 Y12 Y13 Y31 Y22 14 24 34 42 54 A2 Y12 Y13 Y31 Y22 14 24 34 42 54 A2 *) E-Stop E-Stop Reset Reset N N The dual channel E-Stop circuit switches off even if one of the two contacts The single channel fulfills the requirements of EN 60204-1. However of the E-Stop button does not open . If a fault occurs (e.g. the E-Stop contact the circuit of the E-Stop is not redundant. Ground faults in the circuit for connected to Y13 does not open), the safety circuit is activated by the the E-Stop contact are detected. second (redundant) contact Y12. The enabling current paths 13/14, 23/24 and 33/34 open, the auxiliary contact 41/42 closes. The remaining opened contact of K3 in the current path of K1 prevents the restart through the RESET switch. (*) The RESET switch can be monitored through the Application Example A 1004 fleeting contact 53-54. If the RESET switch is closed before the power supply is applied to terminals Y12 and Y13, or there is a short circuit in the cable, External Contact Expansion the enabling current paths will remain open. If however, a short circuit in the L1 RESET cable should occur when the relay is already active the cyclic self- U ext checking feature of the item will detect it when switching the supply off/on. As a consequence the enabling current paths will not close and the safety A1 Y11 Y31 13 23 33 41 53 Y21 Y31 Y31 function is guaranteed. + Y22 Y12 Y13 + + + A1 A2 K3 Application Example K2 A 1002 K1 Two-Channel Sliding Safety Gate Monitoring + L1 Y21 A1 Y11 Y31 13 23 33 41 53 Y21 K1 K2 K3 Y31 Y31 Y11 + Y22 Y12 Y13 Y12 Y13 Y31 Y22 14 24 34 42 54 A2 + + + A1 A2 K3 K2 E-Stop Reset + K1 K4 Y21 K5 K1 K2 K3 Y11 Feedback Y12 Y13 Y31 Y22 14 24 34 42 54 A2 N Reset Sliding When the SNO 1002 is activated through Y22, the enabling current safety gate path 33/34 closes. The external contactors K4 and K5 switch into their closed operating position. If the E-Stop button is activated, the current paths Y12 and Y13 become de-energized. K2 and K3 drop out. Thus, the = Activated enabling current paths 33/34 opens and the external contactors K4 N and K5 likewise switch into their off position. In case of a fault in the The position of the safety sliding gate is monitored through channel 1 contactors K4 and K5 a restart of the E-Stop Safety Relay is prevented (Y12) and channel 2 (Y13). The SNO 1002 is activated through the by the feedback circuit. RESET switch. If the sliding safety gate opens, the E-Stop Safety Relay returns to its off-position and the enabling current paths 13/14, 23/24, uContactors K4 und K5 must have positively driven contacts. 33/34 open. If the safety gate is closed again the E-Stop Safety Relay uPlease note the directives of your Professional Association. can be activated again through the RESET switch. 1.6 1.17 Relays and Automation Systems Safety Switching Devices TECHNICAL DATA SNO 1002 FUNCTION According to EN 60204-1 Emergency --- Stop Relay Function Display 3 LED´s green Function Diagram FD 0108 W1 POWER SUPPLY DATA Rated Voltage U V AC 24 115 120 230 N Rated Voltage U V DC 24 N Rated Consumption at 50 Hz and U (AC) VA 4,2 4,2 4,2 4,2 N Rated Consumption at 50 Hz and U (AC) W 4,0 4,0 4,0 4,0 N 1 Rated Consumption at U (DC) W 2,4 1 N Residual Ripple V 2,4 ss Rated Frequency Hz 50 to 60 Operating Voltage Range 0,8 to 1,1 x U N CONTROL CIRCUIT only for supplying the control inputs Control Output Y11with respect to PE/A2 (AC-/DC-Unit) Line Resistance (Control Inputs) Ω ≤ 70 Rated Output Voltage V DC 24 No-Load Voltage (AC--Unit) V DC ≤ 40 Rated Current mA 80 Rated Short-Circuit Current I Max. mA 3000 K Fuse AC: Short ---- Circuit Proof Transformer DC: PTC ---- Resistance Response Time (PTC) s 3 Recovery Time (PTC) s 2 Control Inputs Y12, Y13, Y21, Y22: Rated Current Input K1 mA 100 Rated Current per Input K2, K3 mA 40 Response Time t K1, K2, K3 ms 25 A Release Time t Start-Up Cycle K1 ms 70 R1 Release Time tr for the E-Stop K2, K3 ms 5 Minimum Switch-ON Time t for K1 ms 60 M OUTPUT CIRCUIT Contact Equipment 3 N.O. Safety Contact 1 N.C. Control Contact 1 N.O. Fleeting Contact Contact Type Forced Guided Contact Contact Material Ag -- Alloy; Gold -- Plated Switching Voltage U V AC/DC 230/230 n Maximum Rated Current I per Contact A 6 n Maximum Total Current for all Contacts A 18 Application Category Acc. to EN 60947--5--1: 1991 AC--15: U 230 V AC, I 4 A e e DC--13: U 24 V DC, I 6 A e e Short-Circuit Protection, Max. Fuse Element Class gG A 6 Permissible Switching Frequency Switching Cycle/h 3600 6 Mechanical Lifetime Switching Cycles 10 x 10 GENERAL DATA Creepage and Clearance Distances Between Circuits According to DIN VDE 0110 -- 1:04.97: Rated Withstand Voltage kV 4 Over-Voltage Category III Contamination Level 3 Outside, 2 Inside Design Voltage V AC 300 Test Voltage U 50 Hz acc. to DIN VDE 0110 -- 1, Table A.1 kV 2,21 eff Protection Class Housing/Terminals acc. to DIN VDE 0470 Sec. 1:11.92 IP 40/IP 20 Radiated Noise EN 50081--1:03.93, --2:03.94 Noise Immunity EN 50082--2:1995 Ambient Temperature, Working Range °C -- 25 to + 55 Dimension Diagram S 4 -- 6 Connection Diagram KS 0282/4 Weight kg 0,6 (AC -- Unit), 0,5 (DC -- Unit) Approvals BG, CSA, SAG, UL GENERAL TECHNICAL SPECIFICATIONS Page i.11 1.18 1.7 Relays and Automation Systems