Isolating switching amplifier. 4-channel. Ident. no.: 7541189. 5 transistor outputs, short-circuit proof, potential-free and reverse-polarity protected. Output mode adjustable (NO/NC mode). Input circuits monitored for wire-break/short-circuit (ON/OFF switchable) . Common alarm output. Complete galvanic isolation. Input reverse-polarity protected. ATEX, IECEx, UL, CFMUS, CSA, TR CU, INMETRO, TIIS, NEPSI. Installation in zone 2