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BALLUFF
BALLUFF 3RS7000 Series Signal Conditioner, PNP Input, NPN Open Collector Output, 10 → 30V dc Supply
Part: BOS S-F02
Converts PNP sensor signals to NPN outputs for mixed sensor compatibility.
Weidmüller
Weidmuller ACT20X Series Signal Conditioner, NAMUR Sensor, Switch Input, NPN Open Collector Output, 19.2 → 31.2V
Part: 8965360000
IECEx-certified signal conditioner converting NAMUR sensors to NPN output for hazardous zones.