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DI4 OC Open collector inputs

Four-channel digital open-collector / open-drain inputs block

๐Ÿ’Ž Possibilitiesโ€‹

  • Works with any open collector or open drain switches, sensors etc.
  • Easy 2-wire connection
  • Low delay - just 2 ms


โ“ Descriptionโ€‹

DI4 digital open collector or open drain inputs block intended for receiving signals from switches, sensors etc. in automated control systems 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 2 din)
Degree of protection housingIP20
Supply voltage20โ€ฆ25 VDC (24 V nominal)
Power consumption, no more2.5 W
Number of digital inputs4 (for open collector or open drain connections)
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
1Channel 1 state-+0, 1
2Channel 2 state-+0, 1
3Channel 3 state-+0, 1
4Channel 4 state-+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.