OAS technical specifications - Metasys - LIT-12013222 - M4-OASHIST-0 - M4-OASMIN-0 - M4-OASMIN-6 - M4-OASMIN-SC3 - M4-OASMIN-SCS - M4-OASPPA-0 - M4-OASSCHRPT-0 - M4-OASSTD-0 - M4-OASSTD-6 - M4-OASSTD-SC3 - M4-OASSTD-SCS - Server - Open Application Server - 12.0

Open Application Server (OAS) Installation Guide

Product name
Open Application Server
Document type
Installation Guide
Document number
Revision date
Product status

The OAS Turnkey has the following specifications:

Table 1. OAS Turnkey hardware and software specifications
Processor Intel® Atom® E3900
Operating system

Windows 10 Enterprise LTSB version 1607

Database software SQL Server 2017 Express with CU19 (64-bit)
Memory 8 GB
Power input 12 VDC to 24 VDC input
RS-232-C serial ports 1
USB serial ports 1 Four USB 3.0 ports
Ethernet ports 2 2
Wireless card 3 M.2
Storage 128 GB eMMC
Note: The OAS Turnkey does not meet the minimum requirements to run the fault detection and fault triage features.

If you install the OAS on a virtual machine, review the following table to verify that you meet the minimum hardware and software requirements.

Table 2. OAS application hardware and software requirements
Recommended computer platform

Intel Core i7-8700 Processor, Six Cores, 3.20 GHz or better

Note: Match the specs of the ADS/ADX recommendations that correspond to the site characteristics. For example, the number of users, the number of engines and objects, and site traffic. If you host the OAS on a virtual machine, match the recommendations listed in the Network and IT Guidance Technical Bulletin (LIT-12011279).

Two 500 GB hard disk with 40 GB free space after you install all prerequisite software and before you install OAS software. Configure RAID 1 (mirroring) with disk write caching enabled

Note: Prerequisite software includes the supported operating system, database software, and .NET Framework.
Memory 4

Minimum: 8 GB

Note: The VM host must have at least 8 GB of allocated RAM at all times. When you configure the VM, do not select the enable dynamic memory option.
Supported desktop operating systems and database software

Windows® 10 Pro and Windows 10 Enterprise Editions versions 2004, 21H1, and 21H2 (64-bit). For all future Windows 10 updates after version 21H2, we will evaluate and certify that Metasys software can support the updates before we provide guidance on support.

Windows® 10 Enterprise LTSC (21H2) (64-bit)


  • SQL Server® 2019 Express with CU14 (64-bit)
  • SQL Server® 2017 Express with CU27 (64-bit)
  • SQL Server® 2016 Express with SP2 CU17 (64-bit)
Supported server operating systems and database software

Windows® Server® 2019 (version 1809 or later) (64-bit)

Windows® Server® 2016 (version 1607 or later) (64-bit)

  • SQL Server® 2019 with CU14 (64-bit)
  • SQL Server® 2017 with CU27 (64-bit)
  • SQL Server® 2016 with SP2 CU17 (64-bit)
Supported user interfaces

Metasys User Interface

Site Management Portal (SMP)

Supported virtual environments

Microsoft Hyper-V™


Additional software included with the OAS software download

Microsoft .NET Framework Version 4.7.2

Microsoft .NET Core 3.1.21

Launcher Software

RabbitMQ Server 3.8.16

Erlang OTP 23.2 (11.1.4)

Optional software

Metasys Database Manager

Language Installation Program

1 Although the USB ports are active on the OAS Turnkey hardware, the OAS does not support using them as an integration method. For example, you cannot connect a trunk of field devices using the USB port. Use a remote field bus or BACnet/IP field devices.
2 Use only one Ethernet port for network connectivity.
3 The wireless card is not supported for use with Metasys.
4 For best performance, use the maximum amount of memory that the computer allows.