Buyer Guides 1 min read

SCADA Hardware Selection Guide: What to Look for in a SCADA Workstation

TSL Automation Solutions August 6, 2024

SCADA Workstation vs SCADA Server

A SCADA server collects data from PLCs, runs the SCADA application engine, hosts the historian database, and provides services to multiple clients. It requires higher CPU, more RAM, and fast storage. A SCADA operator workstation (or client) runs the HMI graphical interface, displays trends, and handles operator alarms — it needs a good display, reliable GPU, and fast response times rather than raw server power.

SCADA Server Hardware Specification

Processor: Intel Core i7 or Xeon (for large tag counts >10,000)
RAM: 16–32 GB (Ignition recommends 16 GB minimum for production servers)
Storage: 512 GB NVMe SSD (OS + SCADA application) + 2 TB SSD (historian data); RAID 1 mirror for data protection
Network: Dual GbE — one for OT network (PLCs), one for IT/corporate network
OS: Windows 10 IoT Enterprise or Windows Server 2022 LTSC

SCADA Operator Station Specification

Processor: Intel Core i5 (sufficient for most client applications)
RAM: 8–16 GB
Display: 21.5" or 24" industrial monitor, 1920×1080 minimum; dual-screen for larger process overviews
Touch: Optional PCAP touch for operator convenience
Form factor: Panel PC (with integrated display) or Box PC + external monitor

Critical Reliability Features

Fanless design (dust and vibration immunity)
Wide operating temperature (0°C–60°C minimum)
Industrial-grade SSD (rated for 24/7 write workloads)
TPM 2.0 for BitLocker encryption
Watchdog timer for automatic recovery from OS hangs

Frequently Asked Questions

What hardware is needed to run a SCADA system?

A SCADA system requires: a SCADA server (industrial PC with sufficient RAM, fast NVMe storage, and redundant LAN ports), operator workstations (Panel PCs or industrial monitors with PCs for control room operator interaction), a historian server (industrial PC or NAS with large storage for long-term data), network infrastructure (industrial Ethernet switches with VLAN support), and communication interfaces to PLCs and RTUs (OPC UA server, Modbus TCP, PROFINET).

How much RAM does a SCADA server need?

SCADA server RAM requirements depend on tag count and historian configuration: under 5,000 tags — 8GB minimum, 16GB recommended; 5,000–50,000 tags — 16–32GB; over 50,000 tags — 32–64GB. Historian databases with high-frequency logging (100ms scan rates on many tags) require more RAM for buffering. Always add 50% headroom above your current tag count for future expansion.

What storage is recommended for SCADA historian data?

SCADA historian storage requires high reliability and adequate capacity: use industrial-grade NVMe SSDs for the OS and application, and high-capacity SATA SSDs or SAS drives (in RAID 1 or 5) for the historian database. Calculate historian storage: a 10,000-tag system at 1-second resolution generates approximately 100–500GB per year depending on compression. Size for at least 3–5 years of on-site storage with cloud archiving for long-term.

Should SCADA servers be redundant?

For critical processes (continuous manufacturing, power generation, water treatment), SCADA server redundancy is strongly recommended — with automatic failover between primary and standby servers in under 30 seconds. Redundancy is achieved with dedicated SCADA software redundancy (Ignition Redundancy, WinCC Redundancy) plus hardware redundancy (dual servers, redundant power supplies, dual LAN paths). For less critical batch or discrete manufacturing, single-server architecture with regular backups may be acceptable.

Does TSL Automation supply SCADA hardware in India?

Yes — TSL Automation Solutions supplies Avalue industrial PCs, Panel PCs, and servers suitable for SCADA host, historian, and operator workstation applications in Indian manufacturing and utility projects. We provide hardware selection guidance based on your tag count, SCADA software, and redundancy requirements. Contact our Mumbai team.

Tags: SCADA hardware selection SCADA workstation spec industrial PC for SCADA SCADA server hardware India SCADA Panel PC SCADA operator station

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TSL Automation Solutions

Head of Marketing, TSL Automation Solutions

Sanjana covers industrial automation trends, product launches, and technology insights for TSL Automation Solutions, a Mumbai-based distributor of HMI, Panel PC, and embedded computing systems serving manufacturers across India and globally.