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
| |
Number of ports | RS485*1 | Number of interfaces | 4 Relay output |
Standard | RS485: A, B | Standard | DO*4, COM*2 |
Baud rate | 600～921600bps | Mechanical durability | 10^7 |
Data bit | 8, 9 | Electrical durability | 10^5 |
Stop bit | 0.5, 1, 1.5, 2 | Capacity | 5A 250VAC 30VDC |
Check Bit | NONE EVEN ODD | |
| Number of interfaces | 4 Relay input |
Voltage | 9~36V | Standard | DI*4, COM*2 |
Current | 60mA(aver) @9V
30mA(aver) @36V | Detection range (wet node) | 5~50V->High0~2V->Low |
| |
ESD | IEC61000-4-2, Level 4 | Number of Interfaces | 4 Analog input |
Surge | IEC61000-4-2, Level 3 | Standard | AI*4, COM*2 |
Group pulse | IEC61000-4-2, Level 3 | Scope of test | 4~20mA |
- 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
| ZHC2921 |
RS485 Modbus | √ |
RS485 Automatic Acquisition | √ |
Virtual Serial Port | √ |
Connfiguration Software | √ |
Threshold Report | √ |
| Configuration Software Docking | √ |
Modbus RTU/TCP | √ |
