---
title: "RL4-U01 4-port Relay"
slug: "rl4-u01-4-port-relay"
status: "update"
updated: 2025-04-10T14:56:48Z
published: 2025-04-10T14:56:48Z
canonical: "docs.zpesystems.com/rl4-u01-4-port-relay"
---

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

# RL4-U01 4-port Relay

![](https://cdn.document360.io/763c5fb1-b9af-4ccd-9ad6-cf28ae4cd5a3/Images/Documentation/image-1679665826170.png)

Automate control of your equipment and sensors with this easy-to-use 4-port relay module. Connect to Nodegrid USB port, and relay simple commands to devices. The sensor controls and read status is accessed via CLI, SNMP, Restful APIs. Nodegrid device (Kibana).

**Hardware:**

- Cable Length 3 meters (10 feet)

**Specifications:**

- 4 onboard DPDT Relays
- 1A/ 120V AC / 2A/ 24V DC Maximum Switching Current

##