# M-Bus 10 Converters Data Sheet

## M-Bus Converters (C01 - C04)

<table border="1" id="bkmrk-c01-c02-c03-c04-feat" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 50%;"></col><col style="width: 50%;"></col></colgroup><tbody><tr><td>**C01 C02 C03 C04**

**[![image.png](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/MKjimage.png)](https://doc.redisage.com/uploads/images/gallery/2024-03/MKjimage.png)**

</td><td>**Features**

- Serial ports RS232 and RS485
- Up to 10 simultaneously connected slave devices
- ESD protection for the RS232/485 data line
- 1000 VDC isolation protection
- Power supply: +12 to +30 VDC or 24 VAC
- Transmission speed up to 9600 bps
- Tx, Rx and power LED indicators
- RS485 embedded termination 120 ohm
- Operating temperatures: -40°C to +75°C
- DIN-rail mounting
- Compact size - single module format (1M)
- Dimensions: 90x56.4x17.5 mm
- 3 years warranty
- Customization of OEM is welcomed

</td></tr></tbody></table>

### Introduction

C01 - C04 family products are reliable M-Bus electrical standard converters. They enable communication in master mode with up to 10 simultaneously connected slave devices. Dedicated EMC integrated circuits guarantee improved connection quality by limiting the impact of interferences typical for an industrial environment.

### Specifications

<table border="1" id="bkmrk-redisage-pn-c01-c02-" style="border-collapse: collapse; width: 100%; height: 960.813px;"><colgroup><col style="width: 16.6865%;"></col><col style="width: 16.6865%;"></col><col style="width: 16.6865%;"></col><col style="width: 16.6865%;"></col><col style="width: 16.6865%;"></col><col style="width: 16.6865%;"></col></colgroup><thead><tr style="height: 35.375px;"><td class="confluenceTh align-center" colspan="2" style="height: 35.375px;">**Redisage PN**  
</td><td class="confluenceTh align-center" style="height: 35.375px;">**C01**

</td><td class="confluenceTh align-center" style="height: 35.375px;">**C02**

</td><td class="confluenceTh align-center" style="height: 35.375px;">**C03**

</td><td class="confluenceTh align-center" style="height: 35.375px;">**C04**

</td></tr></thead><tbody><tr style="height: 46.5938px;"><td class="confluenceTd" rowspan="2" style="height: 76.3907px;">Converter ports</td><td class="confluenceTd" style="height: 46.5938px;">Serial</td><td class="confluenceTd align-center" style="height: 46.5938px;">1 x passive RS232</td><td class="confluenceTd align-center" style="height: 46.5938px;">1 x active RS232</td><td class="confluenceTd align-center" style="height: 46.5938px;">1 x RS485</td><td class="confluenceTd align-center" style="height: 46.5938px;">1 x active RS232/RS485</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" style="height: 29.7969px;">M-Bus</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">1 x M-Bus master with up to 10 x slaves</td></tr><tr style="height: 35.375px;"><td class="confluenceTd" rowspan="2" style="height: 65.1875px;">Power

</td><td class="confluenceTd" style="height: 35.375px;">Voltage

</td><td class="confluenceTd align-center" colspan="4" style="height: 35.375px;">12-30 VDC / 24 VAC

</td></tr><tr style="height: 29.8125px;"><td class="confluenceTd" style="height: 29.8125px;">Power</td><td class="confluenceTd align-center" colspan="4" style="height: 29.8125px;">&lt; 1 W</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" colspan="2" style="height: 29.7969px;">Frame ground connection</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">yes</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" rowspan="3" style="height: 89.3907px;">Serial  
interface

</td><td class="confluenceTd" style="height: 29.7969px;">RS232</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">TxD, RxD, GND</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" style="height: 29.7969px;">RS485</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">A, B</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" style="height: 29.7969px;">M-Bus</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">MBus+, MBus -</td></tr><tr style="height: 35.375px;"><td class="confluenceTd" colspan="2" style="height: 35.375px;"><span class="legacy-color-text-green4"><span style="color: rgb(45, 194, 107);">1000 VDC isolation side</span>  
</span>

</td><td class="confluenceTd align-center" style="height: 35.375px;"><span class="legacy-color-text-green4" style="color: rgb(45, 194, 107);">RS232</span>

</td><td class="confluenceTd align-center" style="height: 35.375px;"><span class="legacy-color-text-green4" style="color: rgb(45, 194, 107);">RS232</span>

</td><td class="confluenceTd align-center" style="height: 35.375px;"><span class="legacy-color-text-green4" style="color: rgb(45, 194, 107);">RS485  
</span>

</td><td class="confluenceTd align-center" style="height: 35.375px;"><span class="legacy-color-text-green4" style="color: rgb(45, 194, 107);"> RS232/RS485  
</span>

</td></tr><tr style="height: 35.375px;"><td class="confluenceTd" colspan="2" style="height: 35.375px;">Baud rate

</td><td class="confluenceTd align-center" colspan="4" style="height: 35.375px;">up to 9600 bps

</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" colspan="2" rowspan="2" style="height: 59.5938px;">LED indicators</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">communication Tx, Rx, power</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd align-center" style="height: 29.7969px;">RS232 OK</td><td class="confluenceTd align-center" colspan="3" style="height: 29.7969px;">N/A</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" colspan="2" style="height: 29.7969px;">RS485 termination</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">120 ohm manually enabled</td></tr><tr style="height: 33.4531px;"><td class="confluenceTd" rowspan="4" style="height: 133.812px;">Connector</td><td class="confluenceTd" style="height: 33.4531px;">RS232</td><td class="confluenceTd align-center" colspan="4" style="height: 33.4531px;">3-pin terminal block max. 2.5 mm<sup>2</sup> wire</td></tr><tr style="height: 33.4531px;"><td class="confluenceTd" style="height: 33.4531px;">RS485</td><td class="confluenceTd align-center" colspan="4" style="height: 33.4531px;">3-pin terminal block max. 2.5 mm<sup>2</sup> wire</td></tr><tr style="height: 33.4531px;"><td class="confluenceTd" style="height: 33.4531px;">Power</td><td class="confluenceTd align-center" colspan="4" style="height: 33.4531px;">3-pin terminal block max. 2.5 mm<sup>2</sup> wire</td></tr><tr style="height: 33.4531px;"><td class="confluenceTd" style="height: 33.4531px;">M-Bus</td><td class="confluenceTd align-center" colspan="4" style="height: 33.4531px;">3-pin terminal block max. 2.5 mm<sup>2</sup> wire</td></tr><tr style="height: 80.1719px;"><td class="confluenceTd" rowspan="3" style="height: 139.766px;">Transmission  
distance

</td><td class="confluenceTd" style="height: 80.1719px;">RS485

</td><td class="confluenceTd align-center" colspan="4" style="height: 80.1719px;">max. 1,200 m at 9.6 kbps; max. 400 m at 115.2 kbps  
(Belden 9841 2P twisted-pair cable, if different cables are used,  
the transmission distance may change)

</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" style="height: 29.7969px;">RS232</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">max. 15 m at 115.2 kbps</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" style="height: 29.7969px;">M-Bus</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">see: M-Bus max. transmission distance  
</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" colspan="2" style="height: 29.7969px;">Mounting and enclosure</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">DIN rail, plastic PA - UL 94 V0, black/green</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" colspan="2" style="height: 29.7969px;">Temperatures</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">-40°C to +75°C operating and storage  
</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" colspan="2" style="height: 29.7969px;">Humidity</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">10 - 90% RH, non-condensing</td></tr><tr style="height: 35.375px;"><td class="confluenceTd" colspan="2" style="height: 35.375px;">ESD protection

</td><td class="confluenceTd align-center" colspan="4" style="height: 35.375px;"><span data-colorid="iaj36wocxg">±</span>4 kV contact discharge / <span data-colorid="rv4vbkrhma">±</span>8 kV air discharge

</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" colspan="2" style="height: 29.7969px;">Certification </td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">CE, RoHS, EMC, LVD</td></tr><tr style="height: 46.5938px;"><td colspan="2" style="height: 46.5938px;">Norms</td><td colspan="4" style="height: 46.5938px;">61000-6-2 - Immunity standard for industrial environments

61000-6-4 - Emission standard for industrial environments

</td></tr></tbody></table>

#### M-Bus max. transmission distance  


[![image.webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image.webp)


#### Passive vs. Active RS232

Devices equipped with a **passive RS232 interface** do not include an internal voltage converter. In this case, the connected external device must supply the necessary voltage to drive the RS232 data lines. This means the RS232 port is functional only when connected to a host device capable of providing the required signaling levels.

In contrast, devices with an **active RS232 interface** feature an integrated voltage converter that generates the appropriate RS232 voltage levels internally. As a result, the data lines are powered by the converter itself, ensuring proper signal levels regardless of the capabilities of the connected device.

### Variants  


#### C01 - M-Bus10 Converter to passive RS232  


<div drawio-diagram="1628"><img src="https://doc.redisage.com/uploads/images/drawio/2026-02/drawing-29-1770984884.png" alt=""/></div>


#### C02 - M-Bus10 Converter with active RS232 interface  


<div drawio-diagram="1627"><img src="https://doc.redisage.com/uploads/images/drawio/2026-02/drawing-29-1770984872.png" alt=""/></div>


#### C03 - M-Bus10 Converter to RS485  


<div drawio-diagram="1621"><img src="https://doc.redisage.com/uploads/images/drawio/2026-02/drawing-29-1770984134.png" alt=""/></div>


#### C04 - M-Bus10 Converter to RS232/RS485 with active RS232/RS485 interface  


<div drawio-diagram="1626"><img src="https://doc.redisage.com/uploads/images/drawio/2026-02/drawing-29-1770984859.png" alt=""/></div>

<p class="callout warning">In the C04 gateway user can use only RS232 or only RS485 interface of one port as they occupy the same internal bus of the device.</p>

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### Pin assignments  


<table border="1" id="bkmrk--11" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 50%;"></col><col style="width: 50%;"></col></colgroup><tbody><tr><td class="align-center">**C01**

**[![image (1).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-1.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-1.webp)**

</td><td class="align-center">**C02**

**[![image (2).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-2.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-2.webp)**

</td></tr><tr><td class="align-center">**C03**

**[![image (3).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-3.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-3.webp)**

</td><td class="align-center">**C04**

**[![image (4).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-4.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-4.webp)**

</td></tr></tbody></table>

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