The PCMK card is a card—commonly called a “PC Card”—used to connect a DOS‑based or early Windows laptop to Allen‑Bradley PLCs.
If you’ve ever worked with legacy Allen‑Bradley PLCs (Programmable Logic Controllers) from the 1990s or early 2000s, you may have come across a mysterious term: . pcmk card
| Feature | Detail | |---------|--------| | Form factor | PCMCIA Type II | | Protocols | DH+, DH‑485, RIO | | Software | RSLinx (classic), RSLogix 5/500 | | Max nodes (DH+) | Up to 64 | | Cable required | 1784‑PCMK to 1784‑PCM5 (or similar) | The PCMK card is a card—commonly called a
While it looks like a relic today, the PCMK (PC Card Master Kit) was once an essential tool for thousands of automation engineers. In this post, we’ll cover what it was, why it mattered, and what has replaced it. In this post, we’ll cover what it was,
If you need to connect to DH+ or DH‑485 today, consider these alternatives:
You can use this as a blog post, a LinkedIn article, or a knowledge base entry. The PCMK Card Explained: A Forgotten Key to Industrial Automation