Hunter PCM-300 Expansion Module for Pro-C & HPC Controllers — Adds 3 Stations, Plug-in Weather-Resistant

The Hunter PCM-300 is a plug‑in expansion module that instantly adds three irrigation stations to compatible Pro‑C and HPC controllers without reprogramming.

If your landscape needs more zones but your existing Hunter controller still has life left, the PCM‑300 offers a simple path to expand capacity. This compact module slides into the controller, locks in place, and is automatically recognized by the system so you can extend from 4 to 7, 7 to 10, or 10 to 13 stations depending on the main unit. It was engineered by Hunter for outdoor use, combining ease of installation with durable construction for reliable seasonal operation.

How does the PCM‑300 integrate with my existing Pro‑C or HPC controller?

Integration is plug‑and‑play: the module communicates with the controller immediately upon installation. There is no need to power cycle, reset, or reconfigure programs — the controller detects the new stations and incorporates them into its scheduling and valve outputs.

• Automatic module recognition eliminates manual setup.
• Direct slide‑in connection fits the controller’s expansion slot.
• Power Lock secures electrical contact without tools.

What practical benefits will I notice after adding the module?

Adding three stations lets you divide turf, plantings, and irrigation needs into finer zones for better water distribution. You’ll reduce run times for each zone, enable more efficient watering windows, and avoid the cost and downtime of swapping the entire controller.

• More precise zone management improves coverage and efficiency.
• Staggered scheduling reduces simultaneous head pressure drops.
• Lower upgrade cost versus replacing the main controller.

Is installation difficult or do I need an electrician?

Installation is designed for homeowners and professionals alike: the PCM‑300 uses Hunter’s tool‑free Power Lock system so no special wiring or electrician is required for module installation. If you’re comfortable opening the controller and sliding in a card, you can complete the upgrade quickly and safely.

• No rewiring or soldering — just slide and lock into the slot.
• No programming changes required; controller auto‑detects the module.
• Includes weather‑resistant design for outdoor cabinet installations.

How rugged is the PCM‑300 for outdoor irrigation environments?

Hunter built the PCM‑300 to withstand the typical stressors found in irrigation systems, including moisture, temperature swings, and electrical disturbances. The module’s construction and contact design maintain consistent operation season after season so your expanded zones remain dependable.

• Engineered by Hunter for long‑term outdoor reliability.
• Surge‑tolerant and moisture‑resistant components protect performance.
• Maintains stable connections without frequent maintenance.

Who is this for: The PCM‑300 is ideal for homeowners with growing landscapes, landscapers managing multiple zones, and irrigation professionals who need an economical way to increase controller capacity without replacing the main unit. If you want straightforward expansion, reliable seasonal performance, and compatibility with Hunter Pro‑C or HPC controllers, the PCM‑300 is a practical upgrade that adds new zones with minimal effort and cost.