GPRS modbus RTU modem, rs485 modbus rtu gateway

System Feature

• Adopted highly integrated industrial 32-bit ARM MCU
• 24×7 working, soft and hardware Double watchdog
• With signal filtering mechanisms
• Stable reconnection strategy for data transmit
• Update RTC automatically or manually, clock source support Sms, NTP, CwtIO Server
• Automatically execute preset task by schedule(second, minute, day, week, month)
• Event-based linkage programming, e.g. alarm linkage output
• Provide console utility for visual programming over 100 parameters
• Optional inside lithium battery for power lost alarm and keep 8-20 hours working

DI feature

• Monitor dry contact(NO or NC)

DO(T) feature

• Open-collector output(drive voltage=power supply voltage, Drive current≤500mA)
• Remote or local event activate DO on/off/pulse
• Remain down status when power lost

DO(K) feature

• Relay NO output(load: 2A / 125VAC,220VDC)
• on/off/pulse DO by remote control or local event
• Remain down status when power lost

AI feature

• Accept 4-20mA (option: 0-5V), Sampling frequency: 33Hz, 10-bit precision)
• Convert 4-20mA(0-5V) to physical value
• Can set parameters for value processing, alarm, data transmission
• Detect connect or disconnect to alarm

SMS feature

• Can add 10 administrator numbers for alarm and remote control
• Any device alarm status can be sent by sending sms
• All alarm and recover sms text can be edited
• Remote get device status or value by sending sms command
• Control output via sms command
• Can set interval to report IO channel's status or value by sms
• Remote setting via sms commands
• Forward simcard overdue sms to admin
• Sms alar for power lost and recover

Wireless network communication

• Option network: cellular(2g/3g/4g) or Wi-Fi
• Support TCP/IP two-way communication with Max.4 servers(IP or domain)
• Events(e.g. alarm, timer) trigger upload data
• Communicate with server by optional Cwt_IO, Modbus TCP, http post protocol
• Can forward data between wireless network with RS485 or RS232

Modbus feature

• Can be modbus master read/write salve over RS485
• As a RS485 I O module to be polled by modbus master
• Support Modbus RTU to TCP convert over Ethernet or GPRS/3G