... directlyalarm angle can set by command freely Four-channel switch signal CE approved Technical DatasOperating voltage:9-24V (DC ... 40-+85oCSize of case:80*75*58mmFeatures Four channel switch signal and RS232 outputEntirely industrial parts of appratus, stable ... ,over loading short circuit protection.transistor drive,OC door output,Cast aluminum,IP68 protection ApplicationsChain block, Hoist, crane, ...