Building Automation System -BAS- Asset Inventory Worksheet

BAS Connected Asset Inventory Worksheet The "Must-Have" Mapping Tool for BAS Security & Management

"You can only protect what you have mapped."

In the world of Building Automation Systems (BAS), the greatest risk is often the device or connection you didn’t know existed. Whether you are preparing for a security audit, taking over a new site, or hardening your facility against cyber threats, you need a clear, structured picture of your connected environment.

This multi-tab spreadsheet is organized according to the three critical layers of a BAS:

• Field Level Assets: Track your sensors, actuators, and VFDs. Document what they control, how they communicate, and which controller they report to.

• Control Level Assets: Map your DDC controllers. Record IP addresses, network segments, credential status, and, most importantly, who has the ability to push logic changes.

• Management Level Assets: Inventory your operator workstations, software platforms, and dashboards. Identify internet exposure, patch status, and corporate IT bridges.

• The External Access Log: Dedicated space to track the "silent" risk: vendor portals, VPNs, and remote connections. This is often the most overlooked exposure point in a building.

• Summary Dashboard: A quick-check view with auto-calculated counts and flags, giving you an instant overview of your system's scale and unknown variables.

Key Features

• Structured ID System: Pre-formatted ID structures (F-xxx, C-xxx, M-xxx) to help you trace connections across different system layers.

• Security-First Fields: Includes specific columns for "Credential Status," "Internet-Facing," and "Remote Access Enabled."

• Professional Layout: Clean, easy-to-navigate design that is ready to be shared with engineering teams or security auditors.

• Expert Guidance: Built-in tips and "How to Use" instructions to help you identify "priority-to-investigate" items.

Who This Is For

• Facility Managers who want a better handle on their building’s digital footprint.
• BAS Technicians & Engineers tasked with documenting system architecture.
• Cybersecurity Professionals conducting OT/ICS risk assessments.
• Property Owners looking to professionalize their asset management and vendor oversight.

Stop guessing and start mapping. Get your BAS Connected Asset Inventory Worksheet today.

Created by Alana Murray | SCADA & Beyond with Alana™