307 ADAM-4000 Series User ManualAppendix A Technical SpecificationsA.13 ADAM-4053 16-channel Digital Input ModuleTable A.17: ADAM-4053 SpecificationsDI/O channel number 16 digital inputsInput/Outputspeed (bps)Maximum distanceRS-485 (2-wire)1200, 2400, 4800, 9600, 19.2K, 38.4K, 57.6K, 115.2K4000 ft. (1200 m)Digital input levelDry Contact:logic level 0:logic level 1:Wet Contact:logic level 0:logic level 1:Close to GNDOpen+2V maximum+4 to +30 VEffective distance(Dry contact only) 500 m maximumSupport protocol ADAM ASCIIWatchdog timer 1.6 second (System)Power supply +10 to +30 V DC (non-regulated)Power consumption 1.0 W @ 24 V DC