# M-Bus 60-400 Converters & Repeaters Data Sheet

## M-Bus Converters (C05 - C08)

<table border="1" id="bkmrk-c05-c06-c07-c08-feat" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 50%;"></col><col style="width: 50%;"></col></colgroup><tbody><tr><td>**C05 C06 C07 C08**

**[![image (6).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-6.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-6.webp)**

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

- Serial ports RS232 and RS485
- Up to 400 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, power and M-Bus load LED indicators
- RS485 embedded termination 120 ohm
- Operating temperatures: -40°C to +60°C
- DIN-rail mounting
- Dimensions: 90x56.4x35,6 mm
- 3 years warranty
- Customization of OEM is welcomed

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

### Introduction  


C05 - C08 is a family of products that are reliable M-Bus electrical standard converters. They enable communication in master mode with many (60-400) simultaneously connected slave devices and can work as M-Bus repeaters letting to broaden the range of the interface, while simultaneously making the quality better and supporting the safety of the communication. Dedicated EMC integrated circuits guarantee improved connection quality by limiting the impact of interference typical for an industrial environment.

### Specifications

<table border="1" id="bkmrk-redisage-pn-c05-c06-" style="border-collapse: collapse; width: 100%; height: 845.469px;"><colgroup><col style="width: 16.6873%;"></col><col style="width: 16.6873%;"></col><col style="width: 16.6873%;"></col><col style="width: 16.6873%;"></col><col style="width: 16.6873%;"></col><col style="width: 16.6873%;"></col></colgroup><thead><tr style="height: 35.3906px;"><td class="confluenceTh align-center" colspan="2" style="height: 35.3906px;">**Redisage PN**  
</td><td class="confluenceTh align-center" style="height: 35.3906px;">**C05**

</td><td class="confluenceTh align-center" style="height: 35.3906px;">**C06**

</td><td class="confluenceTh align-center" style="height: 35.3906px;">**C07**

</td><td class="confluenceTh align-center" style="height: 35.3906px;">**C08**

</td></tr></thead><tbody><tr style="height: 31.7969px;"><td class="confluenceTd" rowspan="3" style="height: 91.3907px;">Converter ports</td><td class="confluenceTd" style="height: 31.7969px;">Serial</td><td class="confluenceTd align-center" colspan="4" style="height: 31.7969px;">1 x RS232 &amp; 1 x RS485</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" style="height: 29.7969px;">M-Bus master</td><td class="confluenceTd align-center" style="height: 29.7969px;">up to **60** slaves</td><td class="confluenceTd align-center" style="height: 29.7969px;">up to **120** slaves</td><td class="confluenceTd align-center" style="height: 29.7969px;">up to **200** slaves</td><td class="confluenceTd align-center" style="height: 29.7969px;">up to **400** slaves</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" style="height: 29.7969px;">M-Bus slave</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">1 x M-Bus slave</td></tr><tr style="height: 35.3906px;"><td class="confluenceTd" rowspan="2" style="height: 65.1875px;">Power

</td><td class="confluenceTd" style="height: 35.3906px;">Voltage

</td><td class="confluenceTd align-center" colspan="4" style="height: 35.3906px;">12-30 VDC / 24 VAC

</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" style="height: 29.7969px;">Max. power</td><td class="confluenceTd align-center" style="height: 29.7969px;">5 W</td><td class="confluenceTd align-center" style="height: 29.7969px;">8 W</td><td class="confluenceTd align-center" style="height: 29.7969px;">15 W</td><td class="confluenceTd align-center" style="height: 29.7969px;">30 W</td></tr><tr style="height: 35.375px;"><td class="confluenceTd" colspan="2" style="height: 35.375px;">Frame ground connection</td><td class="confluenceTd align-center" colspan="4" style="height: 35.375px;">yes</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" rowspan="2" style="height: 59.5938px;">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: 35.3906px;"><td class="confluenceTd" colspan="2" style="height: 35.3906px;"><span class="legacy-color-text-green4" style="color: rgb(45, 194, 107);">3000 VDC isolation side  
</span>

</td><td class="confluenceTd align-center" colspan="4" style="height: 35.3906px;"><span class="legacy-color-text-green4" style="color: rgb(45, 194, 107);">RS232, RS485, M-Bus slave</span>

</td></tr><tr style="height: 35.3906px;"><td class="confluenceTd" colspan="2" style="height: 35.3906px;">Baud rate

</td><td class="confluenceTd align-center" colspan="4" style="height: 35.3906px;">up to 9600 bps

</td></tr><tr style="height: 29.7969px;"><td class="confluenceTd" colspan="2" style="height: 29.7969px;">LED indicators</td><td class="confluenceTd align-center" colspan="4" style="height: 29.7969px;">communication Tx, Rx, power, M-Bus load, error</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 +60°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: 35.3906px;"><td class="confluenceTd" colspan="2" style="height: 35.3906px;">ESD protection

</td><td class="confluenceTd align-center" colspan="4" style="height: 35.3906px;"><span data-colorid="o9kctmbzfo">±</span>4 kV contact discharge / <span data-colorid="y4w2u1s1hv">±</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</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)

### Variants  


#### C05 - C08 M-Bus Converter with M-Bus repeater functionality  


<div drawio-diagram="1607"><img src="https://doc.redisage.com/uploads/images/drawio/2026-01/drawing-29-1768209499.png" alt=""/></div>

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### Pin assignments  


<table border="1" id="bkmrk-c05-c06-c07-c08" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 50%;"></col><col style="width: 50%;"></col></colgroup><tbody><tr><td class="align-center">**C05**

**[![image (7).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-7.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-7.webp)**

</td><td class="align-center">**C06**

**[![image (8).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-8.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-8.webp)**

</td></tr><tr><td class="align-center">**C07**

**[![image (9).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-9.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-9.webp)**

</td><td class="align-center">**C08**

**[![image (10).webp](https://doc.redisage.com/uploads/images/gallery/2024-03/scaled-1680-/image-10.webp)](https://doc.redisage.com/uploads/images/gallery/2024-03/image-10.webp)**

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