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DomBus37 - 12 inputs, 3 AC inputs, 3 relay output, DomBus and Modbus RTU protocols for domotica systems

DIN RAIL module, 115x90x40mm, supporting both DomBus and Modbus RTU protocols.

It integrates 12x low voltage analog/digital inputs, 3x relays outputs, 3x 115Vac / 230Vac inputs. Optionally it is able to control and monitor the power supply fed to a burglar alarm external siren. Useful to make burglar alarm systems with home automation controllers like Domoticz, Home Assistant, OpenHAB, ...

€78.08
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Creasol DomBus37 is a DIN RAIL module, 115x90x40mm, supporting both DomBus and Modbus RTU protocols.

It integrates 12x low voltage analog/digital inputs, 3x relays outputs, 3x 115Vac / 230Vac inputs. Optionally it is able to control and monitor the power supply fed to a burglar alarm external siren.

It can be connected to the home automation controller by a RS485 serial bus (4 wires, 2 for 12/24V power supply, and 2 for data at 115200bps).

As other DomBus devices, DomBus37 is designed to consume low power, be reliable, fully configurable and easy to use. Each input port is fully configurable, for example as analog or digital input, twinbutton (double button connected to a single port), counter, buzzer,  NTC 10k, ... Analog ports are able to decode single, double, triple, quadruple balanced alarm sensors.

Features15 inputs + 3 output home automation system module, Modbus RTU or DomBus protocol

  • 1x 250V 10A relay with N.O. (SPST) connection, configurable in normal or low power mode, blind mode (UP/DOWN motor) and in flash mode (connected to a blinker lamp or siren)
  • 2x 250V 5A relays with N.O. (SPST) connection, configurable in normal or low power mode, blind mode (UP/DOWN motor) and in flash mode (connected to a blinker lamp or siren)
  • 12x configurable I/Os, each one can be set as digital input (with internal pullhigh, active low), digital input with pulldown (active high), analog input, twinbutton input (double pushbutton connected to a single module input), counter (energy meter, gas or water meter); an internal 10k pullup that can be activated by PCB jumper (for twinbutton and NTC10k sensors)
  • 3x 115Vac / 230Vac optoisolated inputs, that can be used as digital input (to detect voltage on appliances, PIRs, and detect power outage) or counter (meter with AC output)
  • Optionally, activated by some PCB jumpers, it can supply an alarm siren monitoring the siren voltage, current and status / errors.
  • Monitor bus voltage
  • The 12 input ports are protected by clamping diodes and can operate between -40V and +40V.
  • 9-35Vdc power supply (internally regulated by a high efficiency switching mode power supply circuitry that minimize power consumption and dissipation)
  • low power consumption: 12mW normally, 180mW with the 3 relays ON
  • 115200 bps RS485 bus (max length: 1km)
  • DomBus proprietary protocol, working with Domoticz home automation system, or Modbus RTU standard protocol, working with Node-RED, Home Assistant, OpenHAB, and many other systems.

Warnings

  • Do not mix high and low voltage devices on relay outputs: relays may be used all connected to 115 / 230Vac devices, or all connected to 30Vmax devices.
  • Use a 4 wires shielded cable for the bus, using two lines to feed power supply (12 or 24Vdc) protected by a fuse.
  • To reduce noise and reflections on the bus, enable the termination resistor (shorting Rbus PCB jumper behind the LED) on the two furthest ends of the bus.

Complete information and application notes at https://www.creasol.it/DomBus37

DomBus37 Ports capabilities

Default address: 0xff37

Port# Name Capabilities Default configuration Description
1 IN1 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

2 IN2 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

3 IN3 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

4 IN4 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

5 IN5 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

6 IN6 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

7 IN7 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

8 IN8 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

9 IN9 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

10 IN10 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

11 IN11 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).

12 IN12 IN_DIGITAL, IN_DIGITAL_PULLDOWN, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER, CUSTOM IN_DIGITAL

Input, with optional 10k pullup (pcb jumper) and internal pulldown (activated when configured as IN_DIGITAL_PULLDOWN). If connected to a single pushbutton switch or an alarm sensor, the common is GND (when switch is ON, it have to short the port to GND). Can be connected to external NTC thermistor (air or water temperature sensor).
Configure as CUSTOM to enable siren power supply management and monitoring

13 INAC1 IN_AC, IN_COUNTER IN_AC Optoisolated input, that can be connected to a circuit breaker (to notify power outages, expecially for fridges and heat pumps), PIRs with 230V output (to monitor presence),  light and appliances (to monitor when light or devices are ON).
14 INAC2 IN_AC, IN_COUNTER IN_AC Optoisolated input, that can be connected to a circuit breaker (to notify power outages, expecially for fridges and heat pumps), PIRs with 230V output (to monitor presence),  light and appliances (to monitor when light or devices are ON).
15 INAC3 IN_AC, IN_COUNTER IN_AC Optoisolated input, that can be connected to a circuit breaker (to notify power outages, expecially for fridges and heat pumps), PIRs with 230V output (to monitor presence),  light and appliances (to monitor when light or devices are ON).
16 RL1 OUT_DIGITAL, OUT_RELAY_LP, OUT_BLIND,OUT_FLASH OUT_RELAY_LP SPST relay output, NO contact, 10A 250Vac or 30Vdc output capability. Relay contact is protected by varistor.
17 RL2 OUT_DIGITAL, OUT_RELAY_LP, OUT_BLIND,OUT_FLASH OUT_RELAY_LP SPST relay output, NO contact, 5A 250Vac or 30Vdc output capability. Relay contact is protected by varistor.
18 RL3 OUT_DIGITAL, OUT_RELAY_LP, OUT_BLIND(1),OUT_FLASH OUT_RELAY_LP SPST relay output, NO contact, 5A 250Vac or 30Vdc output capability. Relay contact is protected by varistor.
19 VBus CUSTOM CUSTOM 12-24V bus voltage, in mW (for example 13508 for 13.508mV)
20 S.Volt CUSTOM CUSTOM Voltage on the Siren port (IN12 terminal block) in mV. For more information, check paragraph below.
21 S.Curr CUSTOM CUSTOM Current on the Siren port (IN12 terminal block) in mA. For more information, check paragraph below.
22 S.On CUSTOM CUSTOM On/Off entity, to enable/disable power supply to the siren. For more information, check paragraph below.
23 S.State CUSTOM CUSTOM Siren power status. For more information, check paragraph below.

(1): can be used as BLIND output, to open a blind/curtain, but only the previous port can be configured in Domoticz as OUT_BLIND because, when configured as OUT_BLIND, DomBus device automatically configure the next port to drive a relay in open direction.

creDomBus37 CreasolDomBus37

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