PNOZ s4 Safety relays Operating Manual-21396-EN-12
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PNOZ s4 PNOZ s4 safety relay The safety relay provides a safety-related interruption of a safety circuit. The safety relay meets the requirements of EN 60947-5-1, EN 60204-1 and VDE 0113-1 and may be used in applications with } E-STOP pushbuttons } Safety gates } Light beam devices and as a safety component for lifts in accordance with Annex IV of the directive 95/16/EC and EN 81-1.
PNOZ s4 Safety features The relay meets the following safety requirements: } The circuit is redundant with built-in self-monitoring. } The safety function remains effective in the case of a component failure. } The correct opening and closing of the safety function relays is tested automatically in each on-off cycle. } The unit has an electronic fuse.
PNOZ s4 Automatic start: Unit is active once the input circuit has been closed. } } Manual start: Unit is active once the input circuit is closed and then the start circuit is closed. Monitored start with falling edge: Unit is active once } – the input circuit is closed and then the start circuit is closed and opened again. – the start circuit is closed and then opened again once the input circuit is closed.
PNOZ s4 } Calculation of the max. cable length lmax in the input circuit: Rlmax = max. overall cable resistance (see technical details) Rl / km = cable resistance/km } Use copper wire that can withstand 60/75 °C. } Sufficient fuse protection must be provided on all output contacts with capacitive and inductive loads.
PNOZ s4 Connection } Supply voltage Supply voltage AC } DC Input circuit Input circuit E-STOP without detection of shorts across contacts Single-channel Dual-channel E-STOP with detection of shorts across contacts Safety gate without detection of shorts across contacts Safety gate with detection of shorts across contacts Light beam device or safety
PNOZ s4 CAUTION! When used as a safety component in accordance with EN 81-1: – The switch that is used must be designed as a safety switch in accordance with 14.1.2.2 of EN 81-1, so that a failure to open when energised is excluded. – The supply lines to the safety switch must be laid in accordance with 13.5 of EN 81-1 so that short circuits that would bridge the contacts in the switch can be excluded.
PNOZ s4 Operation The unit is ready for operation when the Power LED is permanently lit. LEDs indicate the status and errors during operation: LED on LED flashes Information Status indicators and error indicators may occur independently. In the case of an error display, the "Fault" LED will light or flash (exception: "Supply voltage too low"). An LED that is also flashing indicates the potential cause of the error. An LED that is lit and is static indicates a normal operating status.
PNOZ s4 Fault Diagnostics: Internal error, unit defective } Remedy: Switch supply voltage off and then on again, change unit if necessary. Power Diagnostics: Supply voltage too low } Remedy: Check the supply voltage. In1, In2 alternately Fault Diagnostics: Short detected between S12 and S22 } Remedy: Rectify short across contacts, switch supply voltage off and then on again.
PNOZ s4 Power, In1, In2, Out, Reset, Fault Diagnostics: The operating mode selector switch "mode" is in its start position (vertical position) } Remedy: Switch off the supply voltage and set the required operating mode on operating mode selector switch "mode". Faults - malfunctions } Contact malfunctions: If the contacts have welded, reactivation will not be possible after the input circuit has opened.
PNOZ s4 UB 48-240 VAC/DC Example } Inductive load: 0,2 A } Utilisation category: AC15 } Contact service life: 1,000,000 cycles Provided the application requires fewer than 1,000,000 cycles, the PFH value (see technical details) can be used in the calculation. To increase the service life, sufficient spark suppression must be provided on all output contacts. With capacitive loads, any power surges that occur must be noted. With contactors, use freewheel diodes for spark suppression.
PNOZ s4 Technical details General Approvals Electrical data Supply voltage Voltage Type Voltage tolerance Output of external power supply (AC) Output of external power supply (DC) Frequency range AC Residual ripple DC Continuous duty Max. inrush current impulse A1 Pulse duration Reset circuit Feedback loop Max.
PNOZ s4 Electrical data Dual-channel with detection of shorts across contacts at UB AC Min. input resistance at power-on Voltage at Input circuit DC Reset circuit DC Feedback loop DC Current at Input circuit DC Reset circuit DC Feedback loop Number of output contacts Instantaneous safety contacts (N/O) Auxiliary contacts (N/C) Inputs Number Semiconductor outputs Number Voltage Current Relay outputs Max.
PNOZ s4 Relay outputs Min. current Max. power Safety contacts, DC1 at Max. current Min. current Max. power Utilisation category In accordance with the standard Auxiliary contacts, AC15 at Max. current Auxiliary contacts, DC13 (6 cycles/ min) at Max. current Safety contacts, AC15 at Max. current Safety contacts, DC13 (6 cycles/ min) at Max.
PNOZ s4 Conventional thermal current while loading several contacts Ith per contact at UB AC Conv. therm. current with 1 contact Conv. therm. current with 2 contacts Conv. therm. current with 3 contacts Ith per contact at UB DC Conv. therm. current with 1 contact Conv. therm. current with 2 contacts Conv. therm. current with 3 contacts Times Switch-on delay With automatic reset typ. With automatic reset max. With automatic reset after power on typ. With automatic reset after power on max.
PNOZ s4 Times 750104 Delay-on de-energisation With E-STOP typ. 10 ms With E-STOP 20 ms max. With power failure 40 ms typ. With power failure 80 ms max. Recovery time at max. switching frequency 1/s After E-STOP 100 ms After power fail- 100 ms ure Waiting period with a monitored reset With rising edge 120 ms With falling edge 250 ms Min.
PNOZ s4 Environmental data 750104 Airgap creepage In accordance EN 60947-1 with the standard Overvoltage cate- III / II gory Pollution degree 2 Rated insulation volt- 250 V age Rated impulse with- 4,00 kV stand voltage Protection type Mounting (e.g.
PNOZ s4 Mechanical data Spring-loaded terminals: Terminal points per connection Stripping length Dimensions Height Width Depth Weight 750104 – 750134 – 751104 2 751134 2 – – 9 mm 9 mm 98,0 mm 22,5 mm 120,0 mm 190 g 98,0 mm 22,5 mm 120,0 mm 210 g 100,0 mm 22,5 mm 120,0 mm 190 g 100,0 mm 22,5 mm 120,0 mm 210 g The standards current on 2009-12 apply. Safety characteristic data Operating mode EN ISO 13849-1: 2006 PL Safety con- PL e tacts, instantaneous EN ISO 13849-1: 2006 Category Cat.
PNOZ s4 Order reference Order reference Product type Features Terminals Order no. 750 104 PNOZ s4 24 VDC Screw terminals PNOZ s4 C 24 VDC Spring-loaded terminals 751 104 PNOZ s4 48 – 240 VAC/DC Screw terminals 750 134 PNOZ s4 C 48 – 240 VAC/DC Spring-loaded terminals 751 134 EC declaration of conformity This product/these products meet the requirements of the directive 2006/42/EC for machinery of the European Parliament and of the Council.
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