Model: 1756-OB16 16 point digital quantity 24V DC source current output module 1756-OB16D 16 point digital 24V DC source current diagnostic output module 1756-OB16E 16 point digital 24V DC electronic fuse protection output module 1756-OB16I 16 point digital quantity 24V DC source current isolation output module 1756-OB32 32 point digital quantity 24V DC source current output module 1756-OB32D 32 point digital 24V DC source current diagnostic output module 1756-OB32E 32 point