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  • New item   -56.98€Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22
    New item   -56.98€Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22 1
    New item   -56.98€Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22 2
    New item   -56.98€Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22 3
    New item   -56.98€Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22 4
    New item   -56.98€Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22 5
    New item   -56.98€Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22 6

    Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22

    Code: DLDBM22
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  • Product description

    Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22

    DLDBM22 – a Sentera Controls DIN rail Power over Modbus (PoM) distribution box: 10 RJ45 connectors with Modbus RTU and 24 VDC and 12 RJ12 connectors with Modbus RTU and integrated 3.3 VDC supply. A single cable supplies both data and power to each device.

    Key idea:
    The box is the “distribution board” of the Sentera Modbus system: power and the Modbus line come into it, and cables fan out in a star from it to sensors, controllers and regulators. No software or configuration.
    Connections
    10 × RJ45 (24 VDC) + 12 × RJ12 (3.3 VDC)
    Max. current
    1.5 A total (3.3 VDC – up to 0.3 A)
    Power supply
    24 VDC via Modbus (PoM)
    Installation / protection
    DIN rail, IP20

    Operating principle

    The box is mounted on a DIN rail, and one RJ45 socket is fed with 24 VDC together with the Modbus RTU (RS485) signal, e.g. from a Sentera power module. Devices are connected to the other sockets: RJ45 (1–2 +24 VDC, 3–4 A, 5–6 /B, 7–8 GND) – 24 VDC powered, RJ12 (1–2 +3.3 VDC, 3 A, 4 /B, 5–6 GND) – 3.3 VDC devices.

    The box generates the 3.3 VDC voltage from 24 VDC. The total distributed current is up to 1.5 A (24 VDC and 3.3 VDC combined), of which up to 0.3 A is for the 3.3 VDC RJ12 connectors; the power is 36 W at 24 VDC and 1 W at 3.3 VDC; no configuration is needed.

    Result – up to 21 devices receive power and Modbus communication from a single input, and green LEDs at the RJ45 and RJ12 sockets immediately show where voltage is present. With an operating environment of 0…+60 °C, the box is intended for heated rooms and indoor panels.

    Benefits DLDBM22?
    Neat star-topology Modbus and power distribution in the panel – faster installation with factory-made UTP cables and fewer wiring errors.

    Technical specifications

    Product type Power over Modbus distribution box
    Manufacturer / code Sentera Controls / DLDBM22
    Power supply 24 VDC via Modbus (PoM)
    RJ45 connectors 10 pcs: Modbus RTU + 24 VDC (1–2 +24 VDC, 3–4 A, 5–6 /B, 7–8 GND)
    RJ12 connectors 12 pcs: Modbus RTU + 3.3 VDC (1–2 +3.3 VDC, 3 A, 4 /B, 5–6 GND)
    Max. distributed current 1.5 A total (24 VDC and 3.3 VDC); 3.3 VDC – 0.3 A
    Power 36 W at 24 VDC; 1 W at 3.3 VDC
    Communication Modbus RTU (RS485), A and /B
    Configuration Not required
    Indication Green LEDs: 24 VDC at the RJ45 sockets, 3.3 VDC at the RJ12 sockets
    Installation DIN rail, bottom latch
    Housing ABS, grey RAL 7035
    Protection class IP20
    Operating environment 0…+60 °C, 5–85 % rH non-condensing
    Weight 0.175 kg net
    Compliance EMC 2014/30/EU (EN 61000-6-1, EN 61000-6-3), WEEE 2012/19/EU, RoHS 2011/65/EU

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

    Original manufacturer documentation – technical data, wiring diagrams and installation instructions.

    Main functions

    • 10 × RJ45 with 24 VDC – For Sentera PoM devices – a single UTP cable for data and power.
    • 12 × RJ12 with 3.3 VDC – integrated 3.3 VDC source for devices that need a low voltage.
    • No configuration needed – switch it on and it works.
    • LED indication – the presence of power is visible at a glance.
    • DIN rail – installed in the panel next to the power module.
    • Star topology – each device is connected with its own UTP cable from a single point – easier fault finding.
    • Separate 3.3 VDC limit – RJ12 connectors – up to 0.3 A, so the power budget is calculated clearly.

    Where is it used?

    • Ventilation and HVAC automation panels with many Sentera Modbus devices
    • Power and communication for sensors, sensor-controllers, HVAC controllers and speed controllers
    • Star connection of devices over long distances
    • Systems with 3.3 VDC and 24 VDC Sentera devices
    • Heated technical rooms and indoor automation panels (0…+60 °C)
    • Equipment networks of offices and schools

    On-demand operation

    For internal control panel manufacturers.
    A compact solution for heated rooms where 0…+60 °C is sufficient.
    For room unit network installers.
    3.3 VDC devices connect to RJ12 and 24 VDC devices to RJ45, using factory-made cables.
    For school and office ventilation designers.
    A clear current budget: 1.5 A in total, of which 0.3 A is for the 3.3 VDC part.

    Practical application

    If twelve 3.3 VDC devices and several 24 VDC controllers have to be connected in a heated technical room, then the DLDBM22 serves them from a single PoM input, but the total current of the 3.3 VDC devices must not exceed 0.3 A, and that of the whole box 1.5 A.

    Application guide: how it is used in practice

    The DLDBM22 always distributes the PoM line – only the connected equipment differs:

    Site What is connected Result Installer's note
    Ventilation panel of an office building Sentera power module → RJ45; sensors and controllers → other RJ45 All devices are powered and accessible via Modbus Add up the currents of all devices – ≤1.5 A
    3.3 VDC devices Devices with an RJ12 plug → RJ12 sockets Low-voltage devices receive 3.3 VDC and Modbus Never insert an RJ12 plug into an RJ45 socket
    System with an internet gateway DIG-M-2 / DIGWM → single RJ45 The whole system is accessible via SenteraWeb Include the module current
    Commissioning and adjustment CNVT-USB-RS485 converter → free RJ45 Configuration from a computer The converter does not use the RJ45 power contacts

    How to choose PoM distribution and power supply

    Requirement Recommended model
    6 RJ45 devices, surface mounting, IP65 MDB-M-6 (6 × RJ45, 1.5 A)
    Panel: 10 × RJ45 24 VDC + 12 × RJ12 3.3 VDC, -30…+85 °C DMDBM22 (DIN, 1.5 A)
    Panel: 10 × RJ45 24 VDC + 12 × RJ12 3.3 VDC (up to 0.3 A), 0…60 °C DLDBM22 (DIN, 1.5 A / 0.3 A) ← this model
    24 VDC PoM supply from 85–264 VAC mains + RS485 repeater PDM-8-MB (2 × 24 VDC / 20 W)
    Rule: add up the currents of all connected devices (24 VDC and 3.3 VDC) – the total ≤1.5 A, the 3.3 VDC part ≤0.3 A. For outdoor or damp environments choose the MDB-M-6 (IP65), for power from 230 VAC – PDM-8-MB.
    When to choose another solution: for surface mounting and 6 devices – MDB-M-6 (IP65); for PoM power from the mains – PDM-8-MB; for a wider operating temperature range (-30…+85 °C) – DMDBM22.

    Pros

    • 22 connectors in one DIN module
    • Integrated 3.3 VDC source
    • No configuration needed
    • LED indication
    • Star topology with UTP cables

    Cons / limitations

    • IP20 – in control panel only
    • Total current is limited to 1.5 A, 3.3 VDC – to 0.3 A
    • Operating environment 0…+60 °C – for unheated panels choose the DMDBM22
    • It does not generate 24 VDC itself – a PoM power supply is required, e.g. PDM-8-MB
    • Mixing up RJ12 and RJ45 plugs can damage 3.3 VDC devices

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified electrician or automation specialist with the power disconnected.
    • Attention: do not insert an RJ12 plug into an RJ45 socket – devices requiring 3.3 VDC may be damaged.
    • Do not exceed a total current of 1.5 A and a 3.3 VDC current of 0.3 A.
    • Use in an environment of 0…+60 °C, 5–85 % rH, non-condensing.

    Quick selection guide

    Modbus RTU
    10 × RJ45
    12 × RJ12
    24 VDC / 3.3 VDC
    1.5 A
    DIN
    IP20
    Suitable when you need:
    • to distribute Modbus and 24 VDC power to many Sentera devices;
    • to power 3.3 VDC devices via RJ12;
    • to tidy up the panel wiring with a star topology.
    Check before use:
    • the sum of the currents of all devices (≤1.5 A);
    • how many RJ45 and RJ12 connections are needed;
    • the power of the PoM power supply.
    Important reminder: The DLDBM22 is not a power supply – 24 VDC is fed to it from a PoM power module.

    FAQ

    Does it need to be configured?
    No, the box works without software or settings.
    What is the maximum current?
    Total current is up to 1.5 A, of which up to 0.3 A is for the 3.3 VDC connectors.
    What are the RJ12 sockets for?
    RJ12 sockets are for devices that require 3.3 VDC power and Modbus RTU communication.
    Can it be installed outdoors?
    No, the IP20 enclosure is for panel use only, and the operating environment is 0…+60 °C.
    Where does the box get 24 VDC from?
    24 VDC together with the Modbus signal is supplied over RJ45 from a PoM power supply, for example the Sentera PDM-8-MB.
    What is the difference between DMDBM22 and DLDBM22?
    The number of connectors is the same, but the DMDBM22 operates at -30…+85 °C, while the DLDBM22 operates at 0…+60 °C and in its datasheet the 3.3 VDC current is limited to 0.3 A.

    Modbus RTU distribution box PoM | 10×RJ45 24VDC 1.5A + 12×RJ12 3.3VDC 0.3A | DIN rail | IP20 | 0…60°C | Sentera Controls | DLDBM22

    Sentera DLDBM22 – a Power over Modbus distribution box for DIN rail: 10 × RJ45 24 VDC and 12 × RJ12 3.3 VDC with Modbus RTU, up to 1.5 A, no configuration needed, IP20.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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