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Brand: Bender
Bender MK2430-11 COMTRAXX Remote Alarm Indicator with 12 Inputs
Description
A text alarm panel for Bender monitoring systems
The Bender MK2430-11 is a remote alarm indicator and test combination with a backlit 4 x 20 character LC text display. It shows visual and audible alarm messages from Bender systems such as EDS fault location, RCMS residual current monitoring and MEDICS, which are connected over the BMS bus. In MEDICS systems it meets the test and alarm-display requirements of IEC 60364-7-710 and DIN VDE 0100-710 for IT system monitoring and changeover modules. The MK2430-11 differs from the -12 version by 12 digital inputs and one relay output, which allow messages from third-party systems such as medical gases or UPS to be shown on the same panel.
The article number is B95100001; the unit is a flush-mounting type with the enclosure included. The MK2430-12 (B95100002) has no digital inputs, and the MK2430H-12 (B95100024) is for horizontal flush mounting.
Technical specification
| Parameter | Specification |
|---|---|
| Type / article number | MK2430-11, B95100001 (flush-mounting, 12 inputs / 1 relay) |
| Supply voltage Us | AC/DC 24 V; operating range AC 18 to 28 V / DC 18 to 30 V; power consumption max. 3 VA; voltage failure without reset max. 15 s |
| Display | 4 lines x 20 characters, backlit; 20 languages for standard texts; 200 freely programmable messages; 150 configurable alarm addresses; history memory 250 messages |
| LEDs and buttons | NORMAL (green), WARNING (yellow), ALARM (red); 5 buttons: ISOMETER test, buzzer mute, additional text, scroll and menu; menu texts German/English |
| Buzzer | Acknowledgeable; interval, frequency and repetition configurable |
| Digital inputs (-11) | 12 inputs IN1 to IN12, galvanically separated; N/O or N/C per input; high 10 to 30 V AC/DC, low 0 to 2 V; cable up to 500 m (J-Y(St)Y min. x 0.8) |
| Relay output (-11) | 1 changeover contact, programmable; AC-13 24 V 5 A, AC-14 24 V 3 A, DC-12 24 V 1 A; 10 000 cycles |
| Interfaces | RS-485 with BMS protocol, 9.6 kbit/s, up to 1200 m, address 1 to 150 (factory: 1, master); USB 2.0/1.1 for programming with TMK-SET V4.0 or higher |
| Power supply by AN410/AN450 | Cable lengths from one AN410: 100 to 2500 m depending on cross section and number of MK24 (1/2/3 devices); from one AN450 up to 1300 m for one device (2.5 mm2) |
| Environment | Operating temperature -5 C to +55 C; climatic class 3K22; mechanical class 3M11; EMC immunity DIN EN 61000-6-2, emission DIN EN 61000-6-3 |
| Insulation coordination | Rated insulation voltage AC 250 V; rated impulse voltage 4 kV; pollution degree 3 |
| Enclosure | Front foil RAL 7035 or RAL 7040, marking RAL 5005; front plate RAL 7035; IP50 (surface-mounting type IP54), terminals IP20; UL 94 V-0 |
| Connection | Pluggable screw terminals; 0.2 to 2.5 mm2 (AWG 24 to 12) for supply and bus; 0.08 to 1.5 mm2 for inputs; 0.5 to 0.6 Nm; stripping 7 mm |
| Weight | Flush-mounting max. 210 g; surface-mounting max. 400 g |
Functions on the display
The MK2430 displays the normal-operation indicator, insulation fault, interruption of the phase conductor or PE conductor of the ISOMETER, overload, over-temperature, device failure, messages from insulation fault locators and residual current monitoring systems, supply line failure and changeover system faults, test results and measured values. When a second message arrives while the first is still pending, the buzzer sounds again and the messages flash alternately. The address of the triggering device can be called up, and internal parameters of connected devices, such as alarm addresses and EDS or RCM parameters, can be set through the menu. It can be used standalone or in parallel with other indicators.
Installation notes
- Supply from AC/DC 24 V, either from a separate source or from a Bender AN410 or AN450 power supply, observing the cable lengths in the datasheet.
- Connect the BMS bus with a shielded twisted pair J-Y(St)Y min. 2 x 0.8 and switch on the 120 Ohm terminating resistor at the end of the bus.
- Programme text and addresses with TMK-SET over USB or RS-485; the factory password is activated.
- Accessories listed: MK2430 mounting kit (B95101000) and flush-mounting enclosure (B923710).
- Use the ISOMETER test button on the front to run the IT-system test where this is required.
Typical uses
Alarm panels like this are installed where staff outside the electrical room must see an insulation or residual-current alarm, for example in medical locations, control rooms and process-plant operator areas. See the relays category for other Bender products on this site.
Selection and installation notes
Insulation and residual current monitoring devices are selected from the system type (IT, TN or TT), the system voltage, the leakage capacitance and the alarm levels needed. Connect the device to the system and to earth as the manual shows, set the response values from the system design, check the coupling or measuring current transformer and its wiring, and test the alarm and relay outputs after commissioning. Do not do an insulation test of the plant with the monitor connected unless the manual allows it.
Information needed for a quotation
Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.
Documents and supply information
The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.
Frequently asked questions
What does the MK2430-11 do?
It shows alarm and warning messages from Bender BMS-bus devices on a 4 x 20 character LC display with a buzzer, and has 12 digital inputs for third-party signals.
What is the difference between MK2430-11 and MK2430-12?
The -11 has 12 digital inputs and one relay output; the -12 has none. Article numbers B95100001 and B95100002.
How is it powered?
From AC/DC 24 V; Bender lists the AN410 and AN450 power supplies for powering one or several MK24 panels.
How is it configured?
With the TMK-SET software over USB or RS-485, or through the menu on the device.
Is Seven Star LLC the manufacturer?
No, Seven Star LLC is an independent supplier in Muscat; send us your system type for a quotation.
Datasheets & Documents
- Datasheet Bender MK2430 datasheet (07.2023) Download
Reviews (0)
About brand
Bender is a German family company specialising in electrical safety monitoring, based in Grünberg, Hesse. Walther Bender patented the insulation monitoring device he called the ISOMETER in 1942 and registered the company in Grünberg in 1946. Bender employs about 1,100 people across subsidiaries on four continents.
Seven Star LLC is an independent supplier in Muscat. We list Bender monitoring devices for power, oil and gas, marine, hospital and industrial installations in Oman and the GCC.
Bender company profile
| Founded | 1946, Grünberg, Germany |
|---|---|
| Founder | Walther Bender |
| Ownership | Bender family |
| Key invention | ISOMETER insulation monitor, patented 1942 |
| Product families | ISOMETER insulation monitors such as iso685 and IR425, EDS insulation fault locators, RCMS residual current monitors, NGRM neutral grounding resistor monitors |
Milestones
- 1942: The ISOMETER is patented.
- 1946: The company is registered in Grünberg.
- 2021: Bender marks 75 years.
Bender product series
Insulation monitors include the IR425-D4-2 for systems up to 300 V, the iso685-D-P for 690 V AC systems, the isoUG425-D4-4 earth fault monitor for 12-120 V DC and the IRDH275BM-7 for medium voltage networks. The EDS440-L-4 ISOSCAN locates the faulty feeder once an insulation fault is detected.
Residual current monitors include the RCMS460-D-2 twelve-channel monitor and the RCMA420-D-2 AC/DC monitor for 10 to 500 mA. The NGRM700 supervises neutral grounding resistors, the VMD460-NA-D-2 is a network and system protection relay, and the MK2430-11 COMTRAXX is a remote alarm indicator with twelve inputs.
Where Bender devices are used
IT power systems in plants, ships, hospitals and data centres, DC supplies and battery systems, generator and solar connections to the grid, and earthing systems with neutral grounding resistors.
Bender products we list
Ordering Bender devices: what we need
Send the Bender type and article number, system type (IT, TN or TT), nominal voltage and frequency, the supply voltage of the device and the alarm and communication outputs needed.
Facts checked against Bender's own history and 75th anniversary release, October 2026.
Browse Bender products by category: Switchgear, Enclosures & Distribution.
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Frequently Asked Questions
What does the MK2430-11 do?
It shows alarm and warning messages from Bender BMS-bus devices on a 4 x 20 character LC display with a buzzer, and has 12 digital inputs for third-party signals.
What is the difference between MK2430-11 and MK2430-12?
The -11 has 12 digital inputs and one relay output; the -12 has none. Article numbers B95100001 and B95100002.
How is it powered?
From AC/DC 24 V; Bender lists the AN410 and AN450 power supplies for powering one or several MK24 panels.
How is it configured?
With the TMK-SET software over USB or RS-485, or through the menu on the device.
Is Seven Star LLC the manufacturer?
No, Seven Star LLC is an independent supplier in Muscat; send us your system type for a quotation.
Reviews
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