Overview M244 four digital inputs (DI) and 4 digital outputs (DO) acquisition and control equipment cycle, DO 2 Form C relays and two-way open collector output. Modbus TCP uses the standard communication protocol, data via TCP / IP network remote acquisition of analog. The product also provides a RS485 expansion interface, convenient and flexible way cascades, can support up to 16 cascaded so MD44, MD82, MD88, MD16, MDA8 and other RS485 acquisition module enables network access through the lowest cost, and achieve a variety of digital, analog acquisition combined spread. 5-year warranty. Features → 4 channel digital input; → 4 digital outputs; → analog input; → I / O and system completely isolated; → use Modbus TCP protocol; → RS485 interface as an extension interface to connect MD44, MDA8, MD82 , MD88, MD16 and other modules; → power with good overcurrent and overvoltage, against reverse polarity protection; → rich indicators and comprehensive view of the state, timely troubleshooting; → easy to install. Technical parameters of digital inputs DI 4-way dry contact inputs DI overvoltage protection is less than 240V, over-current of less than 80mA Digital output interface DO 2 Form C relay 2A 30VDC / 1A 125VAC (0,1 Road) 2-way open collector output 30V 500mA (2,3 Road) DO overvoltage protection is less than 60V, less than 500mA overcurrent network communication parameters Interface type RJ-45 rate of 10 / 100M adaptive communication protocol embedded Modbus TCP protocol ARP, ICMP, IP, TCP, UDP, DHCP , DNS setting mode setup serial communication parameters baud rate 9600 Data bits 8 Parity None Stop bits 1 Flow control None Address 1-255 serial port ESD protection 600W lightning protection 1.5KV serial port over current, over voltage less than 240V, less than 80mA Power Parameters Power specifications 9-24VDC (recommended 12VDC) Current 200mA @ 12VDC Surge protection 1.5kW power consumption less than 2W supply overvoltage, overcurrent 60V, 500mA working environment temperature, humidity -25 ~ 85 ℃, 5 ~ 95% RH, non-condensing Storage temperature and humidity -60 ~ 125 ℃, 5 ~ 95% RH, non-condensing other sizes 72.1 * 121.5 * 33.6mm Warranty 5 years warranty