---
title: "Sequence diagrams of connections to Tulip Machines"
slug: "sequence-diagrams-connections-to-tulip-machines"
updated: 2026-01-20T18:23:44Z
published: 2026-01-20T18:23:44Z
---

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

# Sequence diagrams of connections to Tulip Machines

## Overview of this article

- The **scope** of this article consists of infrastructure sequence diagrams between the Tulip platform components and Tulip machines connected via Machine data sources.
- **Audience:**
  - Tulip solution developers
  - I.T. engineers
- The **purpose** of this article is to inform the audience of their Tulip solution's dependencies on:
  - reliable connectivity to Tulip cloud infrastructure
  - performant and reliable local network infrastructure
  - reliability and performance of connected systems
- **Tulip-Internal Latency** - As a back-of-the-napkin approximation, assume each instance of 'Tulip-Internal Latency' is approximately 100 milliseconds.

---

### Tulip App Machine Trigger with Machine Data Source connected via On-Premise Connector Host (OPCH)

![Tulip Sequence Diagram - Scenario Tulip App Machine Trigger with On-Prem Connector Host.png](https://cdn.document360.io/7c6ff534-cad3-4fc8-9583-912c4016362f/Images/Documentation/Tulip%20Sequence%20Diagram%20-%20Scenario%20Tulip%20App%20Machine%20Trigger%20with%20On-Prem%20Connector%20Host.png)

### Tulip Automation triggered by Machine with Machine data source connected via OPCH

![Tulip Sequence Diagram - Scenario: Tulip Automation triggered on Machine Activity Output with On-Prem Connector Host.png](https://cdn.document360.io/7c6ff534-cad3-4fc8-9583-912c4016362f/Images/Documentation/Tulip%20Sequence%20Diagram%20-%20Scenario:%20Tulip%20Automation%20triggered%20on%20Machine%20Activity%20Output%20with%20On-Prem%20Connector%20Host%281%29.png)

---

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**Machine Data Source**

A Machine Data Source is a connection configuration that enables Machines to receive real-time data from physical equipment. Machine Data Sources use protocols like OPC-UA or MQTT to connect to PLCs, sensors, and other industrial equipment, mapping their data to Machine Attributes in Tulip.

ex. An OPC-UA Machine Data Source connects a CNC mill to Tulip, streaming spindle speed and feed rate data.

**On-Premise Connector Host (OPCH)** Tulip **Connector Hosts**are designed to allow your Tulip Apps to interface with external systems such as databases, APIs, and machines. **On-Premise Connector Hosts (OPCH)**sit within your network and allow Tulip to interface with SQL databases and APIs that aren't accessible to the cloud.