E-STOP relays, safety gate monitors Up to Category 2, EN 954-1 PNOZ X7 Unit features Safety features Positive-guided relay outputs: The relay conforms to the following 2 safety contacts (N/O), instanta- safety criteria: neous The circuit is redundant with built-in Connection options for: self-monitoring. E-STOP pushbutton The safety function remains effecti- Reset button ve in the case of a component failu- LED indicator for: re. Switch status channel 1/2 The correct opening and closing of Supply voltage the safety function relays is tested See order reference for unit types automatically in each on-off cycle. Safety relay for monitoring E-STOP Unit description pushbuttons. The safety relay meets the require- Approvals ments of EN 60204-1 and IEC 60204- 1 and may be used in applications with E-STOP pushbuttons PNOZ X7 The safety relay is not suitable for non- contact barriers because a dynamic start is not possible the unit can be started during the delay-on de-energisation time. Block diagram *Only when U = 42 - 240 VAC B Galvanic isolation only when U = 42 240 VAC B Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Strae 2, 73760 Ostfildern, Germany NSG-D-2-046-2010-01 Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh pilz.deE-STOP relays, safety gate monitors Up to Category 2, EN 954-1 PNOZ X7 Function description Automatic start: Unit is active once Increase in the number of available the input circuit has been closed. contacts by connecting contact ex- Single-channel operation: no red- Manual reset: Unit is active once pander modules or external contac- undancy in the input circuit, earth the input circuit is closed and then tors/relays. faults in the reset and input circuit the reset circuit is closed. are detected. Timing diagram Key Power: Supply voltage c : Automatic reset b: Reset circuit closes before input Reset/start: Reset circuit Y1-Y2 d : Manual reset circuit Input: Input circuits A1 a: Input circuit closes before reset t : Switch-on delay 1 Output safe: Safety contacts 13-14, circuit t : Delay-on de-energisation 2 23-24 Wiring Please note: PNOZ X7 AC: The cable runs depend Information given in the Technical on the cable capacitance. details must be followed. Loop circuit, 1 phase: max. l = 1 km r Outputs 13-14, 23-24 are safety R = max. overall cable resi- Stub circuit: Cable capacitance C lmax L contacts. and therefore the cable runs l are stance (see technical details) s To prevent contact welding, a fuse dependent on the supply voltage R /km = cable resistance/km l should be connected before the U B Use copper wire that can withstand output contacts (see technical de- 60/75 C. tails). Sufficient fuse protection must be Calculation of the max. cable runs provided on all output contacts with l in the input circuit: max capacitive and inductive loads. Cable capacitance C depends on the supply voltage U L B U V 42 48 110 115 120 230 240 B C nF 37.5 37.5 37.5 37.5 37.5 7.5 7.5 L Loop circuit Stub circuit Cable runs Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Strae 2, 73760 Ostfildern, Germany NSG-D-2-046-2010-01 Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh pilz.de -2