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R8 Relay

8-channel relay block

๐Ÿ’Ž Possibilitiesโ€‹

  • Contacts NO, COM (normally open relays)
  • Manage loads by type Enable/Disable
  • Control of lighting, ventilation, heaters and other loads
  • Management of low-current devices with dry contact inputs


โ“ Descriptionโ€‹

Relay block R8 is intended for switching signals and elements of electrical circuits in automated control systems for lighting, power distribution equipment, ventilation systems, climate and other electrical loads, in the fields of industry, housing and communal services and household services.

๐Ÿ”ง Technical dataโ€‹

DesignUniversal housing for mounting on a DIN rail (width 6 din)
Degree of protection housingIP20
Supply voltage18โ€ฆ25 VDC (24 V nominal)
Power consumption, no more2.5 W relays off;
5.8 W relays on;
Number of relay outputs8 (normally open state)
Maximum switching voltage30 VDC;
230 VAC;
Maximum switching current16 A
USBService connection
RS485**YoctoBUS or Modbus RTU
Ethernet**IEEE 802.3 10/100BASE-T (http, UDP)
WiFi**IEEE 802.11 (http, UDP)

** Depending on unit configuration.

  • For YoctoBUS blocks: the default exchange protocol type is YoctoBUS, initial configuration is not required.
  • For YoctoLAN units: when connecting to the network via Ethernet, initial configuration is not required, when connected via WiFi, you must set the SSID and Password using the CONNECT Configurator software.

To integrate the unit into third-party systems, the protocol and RS485 exchange rate, as well as network settings, are set through the free, cross-platform CONNECT Configurator software.

๐Ÿ‘โ€๐Ÿ—จ How to connectโ€‹

RS485 controlโ€‹


LAN controlโ€‹


๐Ÿ”Œ API for integration into third-party systemsโ€‹

General block control registers

The block is controlled by setting and reading the values of the block registers.

Register IDRegister descriptionWriteReadRange of values
1Relay status 1++0, 1
2Relay status 2++0, 1
3Relay status 3++0, 1
4Relay status 4++0, 1
5Relay status 5++0, 1
6Relay status 6++0, 1
7Relay status 7++0, 1
8Relay status 8++0, 1

RS485 setting registers.

Register IDRegister descriptionWriteReadRange of values
203**BaudRate RS485++3-9
206Id of the Modbus block++1-247

** Correspondence of RS485 speed and value in register 203:

ValueSpeed, baud/s

It is recommended to configure the RS485 parameters using the CONNECT Configurator software

ModbusRTU mode

The unit supports standard exchange via the ModbusRTU protocol.

  • Reading the state of the register is carried out by the command 3.
  • Record of value in the register is carried out by the command 6.