---
title: "Connections C07W"
slug: "connections-c07w"
updated: 2025-09-02T10:13:54Z
published: 2025-09-02T10:13:54Z
canonical: "docs.calculus.group/connections-c07w"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.calculus.group/llms.txt
> Use this file to discover all available pages before exploring further.

# Connections C07W

This article explains the connectivity options of a C07W gateway.

![Device labeled 'calculus' with indicators for power, status, and connectivity features.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/gateway_c07w_2.png?sv=2026-02-06&spr=https&st=2026-11-11T14%3A10%3A40Z&se=2026-11-11T15%3A10%3A40Z&sr=c&sp=r&sig=peEVcXPyHJBC6raHVhHGJCHJgnyrjAXPw6hFLzf6Yf4%3D)

---

## Connections

> [!CAUTION]
> Attention!
> 
> Always unplug the power supply to avoid short circuits and always use the recommended cable types and tools to perform an installation correctly.

### Nutrition

The C07W gateway must be connected to a DC power supply from 12VDC to 24VDC. Grounding of the gateway is recommended if the gateway is not mounted on a grounded DIN rail.

Pay attention to the polarity:

- Positive power supply polarity: +
- Negative power supply polarity: GND

You can also contact Calculus for a suitable PSU power supply of 230VAC/24VDC or a DIN fuse clamp for security. Use a cable with flexible conductors for better handling, a thickness of at least 20AWG or 0.5mm² of the conductors and appropriate ferrules for the flexible conductors.

### Antennas

Instructions for connecting the antennas can be found in the article: [Connecting antennas to C07W](/v1/docs/en/connecting-antennas-to-c07w).

### RS485 / Modbus RTU

Instructions for connecting with RS485 / Modbus RTU can be found in the article: [RS-485 / Modbus RTU connection](/v1/docs/en/rs-485-modbus-rtu-connection).

## Extra info

Please refer to the C07W technical sheet for additional information:

[PDF document](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/IMPULSE C07W Technical Sheet.pdf?sv=2026-02-06&spr=https&st=2026-11-11T14%3A10%3A40Z&se=2026-11-11T15%3A10%3A40Z&sr=c&sp=r&sig=peEVcXPyHJBC6raHVhHGJCHJgnyrjAXPw6hFLzf6Yf4%3D)