Stock availability type:  A - always in stock


This model has 24 SPDT relay outputs and is perfectly suited for applications with high concentration of control tasks. It also very suitable for remote control and monitoring of Mining Rigs, as this model also has 24 channel Ping Monitor. There are also 3 external sensors connectors and 2 for alarm inputs.


Input-output channels in NetControl 24R3S2A:

  • switch on-off/reboot (normal close relay contact) of up to 24pcs appliances for up to 7A/220VAC (with ability of automatic reboot on PING lost to up to 24 IP address)
  • 3 input connectors for measurеment of temperature (sensor TDS300), humidity (HDS300), water (WDS300)
  • 2 alarm inputs (for mechanical contact/button) for signalization (SNMP trap) of rack/cabinet burglary or AC voltage monitoring (VDS300) sensor
  • integrated "theremoregulator" mode between temperature sensor and any of the relay channels
  • board dimensions 152x124x22mm (no plastic case is supplied). Product can be installed in the following box 180х140х80:


Basic functions and network protocols supported

  • 10/100 BASE-T Ethernet (Auto MDI/MDIX) with differential overvoltage surge protections
  • Supported protocols ARP/DHCP/ICMP/TCP/IP/SNTP/SNMP/TFTP client/WEB server/MQTT/SPC Cloud
  • 802.1q VLAN support
  • SNMPv1 (ONLY snmpget/snmpset) protocol for access to all parameters and functions
  • SNMP traps and MQTT events generation on input change
  • Flexible user-defined system of sequences of actions (Macros)
  • Start of macros on analog input change (Automation)
  • Start of Macros on PING lost to IP addresses (PING monitor)
  • Real-time software clock (RTC) with the ability to start Macros at user-defined time
  • WEB access to all parameters and functions
  • TFTP client for firmware update
  • Firmware update in Web interface



  • Reboot (automatic on PING lost/manual) of hung home network equipment (ADSL modem, routers, APs, Mining Rigs)
  • "Internet controlled power socket" for 220VAC with up to 24 sockets

  • general purpose 24 channel relay module with Web/SNMP control
  • IP guarding

  • IP thermometer and thermoregulator; IP humidity meter


um icon Application notes


um icon User manual, specs and SNMP MIB


firmware Latest firmware image (also publicly available by TFTP at

IMPORTANT! Before updating, please read "FirmwareRevisionHistory.txt" from archive for information on how the new version will affect your current settings!


firmware Beta firmware with support of MQTTs (TLSv1.2)