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  • New item   -15.34€Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6
    New item   -15.34€Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6 1
    New item   -15.34€Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6 2
    New item   -15.34€Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6 3
    New item   -15.34€Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6 4
    New item   -15.34€Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6 5

    Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6

    Code: MDB-M-6
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    Price 27.41 € VAT incl.
    ( 22.65 € VAT excl. )
    42.75 € You save 15.34 €
    Offer is valid until 2026-12-31
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  • Product description

    Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6

    The MDB-M-6 is a compact Sentera Controls Power over Modbus (PoM) distribution box with 6 RJ45 sockets. Each socket carries the Modbus RTU signal and 24 VDC power, so sensors, controllers and speed controllers are connected with a single UTP cable.

    Key idea:
    The IP65 enclosure allows the box to be mounted directly on a wall or structure – where several devices meet, without a separate panel. Nothing needs to be configured.
    Connections
    6 × RJ45 (Modbus RTU + 24 VDC)
    Max. current
    1.5 A total
    Power supply
    24 VDC via Modbus (PoM)
    Installation / protection
    Surface-mounted, IP65

    Operating principle

    The box is surface-mounted, one RJ45 socket is fed with a Modbus RTU line with 24 VDC (e.g. from a Sentera power module), and the other sockets distribute it to the connected devices. The contacts of all sockets J1–J6 are identical: 1–2 – 24 VDC, 3–4 – A, 5–6 – /B, 7–8 – GND.

    The total output current is up to 1.5 A, and also no more than 1.5 A per channel, with a maximum total cable length of 100 m. The box is passive – no software or settings are needed.

    Result – the PoM line branches out right at the devices without a panel and terminal boxes: the IP65 enclosure is rated for an environment of -30…+70 °C and 20–90 % rH, and a green LED at each socket shows whether the device is receiving power.

    Benefits MDB-M-6?
    Quick connection of Sentera PoM devices on site without a panel – even in damp or dusty environments.

    Technical specifications

    Product type Power over Modbus distribution box
    Manufacturer / code Sentera Controls / MDB-M-6
    Power supply 24 VDC via Modbus (PoM)
    Connections 6 × RJ45 (J1–J6): 1–2 24 VDC, 3–4 A, 5–6 /B, 7–8 GND
    Max. current 1.5 A total; 1.5 A per channel
    Max. total cable length 100 m
    Communication Modbus RTU (RS485)
    Configuration Not required
    Indication A green LED at each RJ45 socket
    Installation Surface-mounted
    Housing ABS, grey RAL 7035
    Protection class IP65
    Operating environment -30…+70 °C, 20–90 % rH non-condensing
    Weight 133 g net
    Compliance LVD 2014/35/EU (EN 60664-1), EMC 2014/30/EU (EN 55022, EN 55024, EN 61000-3-2, EN 61000-3-3), WEEE, RoHS

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

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

    Main functions

    • 6 × RJ45 PoM – data and 24 VDC power over a single UTP cable.
    • IP65 enclosure – installed away from the panel – next to the devices, in technical rooms.
    • No configuration needed – switch it on and it works.
    • LED at each socket – you can see at a glance whether the device is receiving power.
    • Uniform socket layout – the contacts of all J1–J6 are identical – fewer wiring errors.
    • Wide operating range – -30…+70 °C, 20–90 % rH non-condensing.

    Where is it used?

    • Environment of air handling units: sensors, speed controllers and frequency converters with Modbus
    • Technical rooms, attics, warehouses without a control panel
    • Agricultural buildings
    • Sentera PoM line branching
    • Unheated rooms and rooftop fan areas (-30…+70 °C)
    • Connecting several room sensors into a single PoM line in a corridor

    On-demand operation

    For farm building ventilation installers.
    The IP65 box is installed in a barn or warehouse without a panel.
    For ventilation chamber installers.
    Six sockets – devices are connected on site with factory UTP cables.
    For the automation integrator.
    A clear PoM topology with no junction boxes and no configuration.

    Practical application

    If three pressure transmitters, a temperature transmitter and a controller have to be connected in a ventilation chamber without a panel, then the MDB-M-6 on the wall distributes the PoM line: one RJ45 for the input, five for devices, as long as the total current does not exceed 1.5 A and the total cable length does not exceed 100 m.

    Application guide: how it is used in practice

    The MDB-M-6 always splits one PoM line into several – only the connected equipment differs:

    Site What is connected Result Installer's note
    Duct ventilation unit Differential pressure transmitter, frequency converter, controller → RJ45 sockets All devices on a single Modbus line with power Total cable length ≤100 m
    Attic / technical room PoM power module → J1; sensors → J2–J6 No control panel or terminal boxes needed IP65 – suitable for dusty environments
    Extension of an existing system New Sentera devices → free sockets The system can be extended without rewiring Check the 1.5 A budget

    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) ← this model
    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)
    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 – ≤1.5 A; total cable length ≤100 m. For more connections in a panel – DMDBM22 / DLDBM22; for power from 230 VAC – PDM-8-MB.
    When to choose another solution: for a panel with 10 × RJ45 and 12 × RJ12 – DMDBM22 or DLDBM22; for PoM power from the mains – PDM-8-MB.

    Pros

    • IP65 – installed without a panel
    • 6 RJ45 PoM connectors
    • No configuration needed
    • LED at each socket
    • Compact and lightweight

    Cons / limitations

    • Total current limited to 1.5 A
    • Total cable length up to 100 m
    • It does not generate 24 VDC itself – a PoM power supply is required, e.g. PDM-8-MB
    • No 3.3 VDC RJ12 connectors – for those use the DMDBM22 / DLDBM22

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified electrician or automation specialist with the power disconnected.
    • Do not exceed 1.5 A total current and 1.5 A per channel.
    • Total cable length – no more than 100 m.
    • Use in an environment of -30…+70 °C, 20–90 % rH, non-condensing.

    Quick selection guide

    Modbus RTU
    6 × RJ45
    24 VDC PoM
    1.5 A
    IP65
    Suitable when you need:
    • to branch the Sentera PoM line to several devices;
    • to mount the distribution outside a panel, in a damp or dusty environment;
    • to connect devices without configuration.
    Check before use:
    • the sum of the currents of the devices (≤1.5 A);
    • the total cable length (≤100 m);
    • the PoM power supply.
    Important reminder: The MDB-M-6 is not a power supply – 24 VDC is supplied to the line from a PoM power module.

    FAQ

    Does it need to be configured?
    No, the box is passive and works without any settings.
    What is the maximum current?
    Up to 1.5 A in total and no more than 1.5 A per channel.
    Can it be installed outside the control panel?
    Yes, the IP65 enclosure is surface-mounted and operates in an environment of -30…+70 °C.
    What is the maximum cable length?
    The total length of all connected cables is up to 100 m.
    Does the box have 3.3 VDC connectors?
    No, all six sockets are RJ45 with 24 VDC; for 3.3 VDC RJ12 connectors choose DMDBM22 or DLDBM22.
    How can I see whether the device is receiving power?
    A green LED next to each RJ45 socket indicates that voltage is present.

    Modbus RTU distribution box PoM | 6×RJ45 | 24VDC | 1.5A | surface-mounted | IP65 | Sentera Controls | MDB-M-6

    Sentera MDB-M-6 – Power over Modbus distribution box: 6 × RJ45 with Modbus RTU and 24 VDC, up to 1.5 A, IP65, surface mounting, no configuration required.

    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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