FDN20-32SN FDN20-4DR FDN20-4S-4XSG FDN20-4S-4XSG/C1261 FDN20-4S-4XSG-0189 FDN20-4S-4XSG-DIN FDN20-4S-4XSG-DIN/C1261 FDN20-4S-4XSG-E FDN20-4S-4XSG-E/C1261 FDN20-BKT-DIN