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Norgren Industrial Automation Catalog

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139 For further information, visit www.norgren.com and use the new improved search function. If you cannot see the option you require please contact us. 3 SWITCHES AND SENSORS Current type Load type *2) U min [V] Max. permanent current Imax [A] at U *1) (UL & CSA) M 12x1 DIN EN 175301-803, form A 30 V 30 V 48 V 125 V 250 V Contact life AC ohmic, inductive 6 0.1 0.1 0.1 0.1 0.1 ≥ 2 x 10 5 switching cycles DC ohmic, inductive 6 0.1 — — — — Recommended circuit Spark quenching and EMV intrinsically safe 1. Quick diode (D) with tv ≤ 200 ns, parallel to inductive load. 2. RC link in parallel to load in parallel to switching contact. Dimensioning principles: RL in Ω ≈ 0.2 x RLoad in Ω C in [µF] ≈ ILoad in [A] + - p D 1) 2) R C RL U DC (AC) d.c (a.c.) ~ ~ 2 3 1 p 2 4 1 p Plug DIN EN 175301-803, form A Microswitch SPDT Terminals 1 - 3: Contacts close on rising pressure. Terminals 1 - 2: Contacts open on rising pressure. Switching function IEC 947-5-2, M12 x 1: Microswitch SPDT Terminals 1 - 4: Contacts close on rising pressure. Terminals 1 - 2: Contacts open on rising pressure. R L = Load resistance Reference number: 20/min, Reference temperature: +20°C. I min = 1 mA at 24 VDC or 5 mA at 6 VDC *1) Higher currents (5 A max) will cause a reduction of the durability of the micro-switch contacts. Futhermore additional measuements has to be taken to fulfil the EMV regulation 2004/108/EG by the manufacturer *2) Spark quenching/overload protection will be necessary using inductive loads. Switching capacity Commutator with gold plated contacts Switching function 18D PNEUMATIC PRESSURE SWITCHES (DIAPHRAGM TYPE) VAC - 435 PSI

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