Hollyland Spares - DB25 Male to GPIO 9-pin Female Tally Cable (for Wireless Tally System)

The Hollyland DB25 Male to GPIO 9-Pin Female Tally Cable (Model: HL-TCB08) is an official OEM interface adapter designed exclusively for the Hollyland Wireless Tally System.

While the system can handle network-based tracking over RJ45, many legacy broadcast video switchers, production desks, and PTZ controllers rely on hardwired General Purpose Input/Output (GPIO) relay closures. This cable serves as the hardware link that translates those physical open/closed ground connections into digital signals the Wireless Tally Station can transmit wirelessly to your on-camera lights.

Core System Functionality

• Dry Contact Relay Logic Mapping: Built to bridge traditional low-voltage dry contact ground loops. When your video switcher triggers a camera channel to Program (On-Air) or Preview (Next Up), the physical closure travels through the 9-pin GPIO terminal, down the cable, and into the DB25 parallel port of the Hollyland Wireless Tally Station box.

• Targeted Channel Deployment: This 9-pin configuration maps targeted channel arrays to streamline smaller multi-camera configurations, eliminating massive wire webs at the engineering desk.

• Molded Strain Relief Boots: Engineered with heavy-duty molded PVC thumbscrew housings on both ends. This secures the pins against accidental tugs or vibration disconnects common behind busy, cramped production racks.

System Ecosystem Interoperability

This specialized adapter cable bridges older-generation physical relay decks with modern wireless transmission gear:

• Hollyland Wireless Tally System Base Station Box (Main DB25 Input Terminal)

• Compatible Switchers / Controllers: Production switchers and camera control units (CCUs) utilizing standard 9-pin GPIO or DB9 tally terminal standards (such as select Panasonic, Sony, or Roland vision mixers).

Technical Specifications Matrix

On-Set Hardware Mapping Tip: Because different camera switcher manufacturers layout their internal 9-pin GPIO pins differently (e.g., Pin 1 might mean Camera 1 Program on a Roland switcher, but mean Ground on a Panasonic unit), do not panic if the lights don't match up instantly on your first plug-in. Rather than cutting or splicing wires, turn on the master Hollyland Tally Station and navigate to its internal Sequence Learning / Pin Customization menu. This software feature allows you to digitally remap how the station reads each pin coming through the HL-TCB08 cable, letting you change configurations inside the box rather than rebuilding the physical cable harness.