Insulated type RS-422A/485, insulation type digital input, insulated digital output 2 points, insulated type counter input 2ch, analog input between channels 2ch, 3G, RS-232C, LAN interface, Ethernet Hub.M2M controller.- [Controller unit] Communication port Ethernet (LAN) 3G Wireless (WAN) Programming Conrosys VTC Stack Bus - Communication function CDS data transmission (https) modbus slave [Digital input/output] number of input points 4 points Output points 2 points two -way score - Response speed (input) 200μSec (max.) Response speed (output) 2msec (max.) Operate voltage (input) - Operate voltage (output) - input circuit Photoba plastic insulation input (compatible with sink output) Output circuit semiconductor relay contact output Built -in power supply 12VDC [Analog input/output] Number of input channels Difference 2-ch input range 0 to 20 ma ADC resolution 12-bit [Counter] Number of channels 2-ch count method 24-bit Up Count Response speed 1kHz [Serial communication] Number of channels 1X RS-232C [asynchronous] 1X RS-232C/422A/485 [asynchronous] Transmission speed 300-115,200bps