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Ex Signaling devicesCombination possibilities: Zener barrier,IS-A105N sounder and IS-Mini series alarmNon-Ex-areaEx-area / Ex-Zone 0, 1 or 2Categories 1G, 2G or 3G1 st stage1 st stage24 V DC+ VE–Z 728IS-A105N1 st – 3 rd stage24 V DC+ VE–Stage 2IS-A105N2 nd stageZ 786Stage 33 rd stageStage 124 V DC(Pole reversal)+ –– +Z 928 ACRIS-A105NR = Monitoring resistor = parallel to input24 V DC+–Z 728IS-mB124 V DC+–Z 728IS-mA124 V DC+–Z 728IS-mC1242www.pfannenberg.com

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