GPRS 3G 3G IOT Cellular Modem Modbus RTU M2M IO Controller With Antenna

• Introduction​ of IOT Cellular Modem

ZHC2921 is a network IO product that supports 4-channel dry (wet) node detection, 4-channel relay (COM, NO, NC) output, 4-channel analog (current 4~20mA) detection, and 1-way serial port passthrough transmission. It is compatible with Modbus RTU/TCP protocol.With the function of "remote control" as the core, it is highly easy to use, and users can easily and quickly integrate into their own system to realize the remote control based on GPRS network.

Parameters of IOT Cellular Modem

• Features of IOT Cellular Modem

◆ Support 4 relay output

◆ Support 4-channel DI (dry/wet node) input

◆ Support 4 analog input (current)

◆ Support 8 condition control instructions, more convenient control

◆ Support serial port heartbeat package

◆ Support a variety of function codes: 01, 02, 03, 04, 05, 06, 0F, 10

◆ Support to set the direction of active data reporting

◆ Support TCP_Client, HTTP_Client

◆ Support two working modes: host mode, slave mode, host mode support RS485 cascade multiple Modbus devices

◆ Compatible with Modbus RTU/TCP

◆ Support cloud forwarding and cloud networking

◆ Support local upgrade, remote upgrade

◆ Support hardware watchdog

◆ Multiple indicator lights show working status

◆ Support domain name address resolution

◆ Support setting APN

Support signal query

◆ Support SIM card number query

◆ Support heartbeat pack

◆ Support any format of registration package, ensure the legality and uniqueness of the device identity

◆ Provide one way switch output

◆ Relay adopts photoelectric isolation

◆ Relays keep long open and long closed state

◆ Support timing reversal relay state

◆ Support setting the starting state of relay