ExpertDAQ Digital Input modules communicate via RS485 and are available with Modbus RTU, Within one RS485-network up to 256 modules may be controlled, Without a RS485 Repeater the maximum cable length is 1200m, The RS485 Digital IO module are sturdy, power saving and easy to use, the EX9053D-M has 16 channels with a low input impedance, The Digital Input RS485 module has a LED-display for each channel and was developed for use in a wide temperature range, features: 16 digital inputs, all inputs isolated, LED-display for each channel, extended temperature range, low input impendance, Digital Level 0: <+1V - Digital Level 1: 4-30 V, Output as RS485-interface, Communicate via Modbus-RTU, manual configuration or with supplied Software, power supply 10 - 30VDC, Hard- and Software Watchdog