SIMATIC S5, IP 281ZAEHLERBAUGRUPPE F. S5-115U/H,S5-135U/-155U/H,GEBERVERSORGUNG 24V/5V ON BOARDUL-/CSA- GELISTETSIMATIC S5IP 281 COUNTER MODULEFOR S5-115U/H, -135U, -155U/H24V/5V SENSOR SUPPLY ON BOARDUL-/CSA LISTED