2-in 1-out Wiegand Splitter Hub Module HDC16 | WG26–WG80

2-in 1-out Wiegand Splitter Hub Module (HDC16)

The HDC16 Wiegand Splitter Hub Module is a versatile multi-channel Wiegand interface board designed to expand and simplify access control installations. Whether you need to consolidate multiple card readers into a single access control motherboard, enable dual-authentication (card + face recognition), or distribute a single card reader's signal to two independent access control panels simultaneously, the HDC16 delivers reliable, flexible performance in one compact module.

Key Features

• Wide Power Input: Accepts +9V to +24V DC at 30mA — compatible with most standard access control power supplies.
• Broad Wiegand Protocol Support: Default support for WG26 through WG80, including WG26/32/34/35/36/37/40/42/44/66/80 and keyboard input.
• Fast Card Swiping: Minimum swiping interval of 150ms per card reader for high-traffic environments.
• RS485 Interface Option: Two WG signals can be input/output via RS485 interface (9600, n81 communication parameters) for optional system integration.
• Dual Card Reader Input (2-in 1-out): Connects two card readers simultaneously; card data from WG1 and WG2 is forwarded sequentially through the WG3 output — WG1 takes priority when both are swiped at the same time.
• Expand One-Way to Two-Way Access: Enables you to convert a 4 one-way access control motherboard setup into a 4 two-way swipe card door configuration.
• Dual Authentication Support: Connect a face recognition device and a card reader together; the module compares both WG signals and only outputs to the access control board when both identifiers match — enabling card + face dual authentication.
• 1-in 2-out Splitting: A single card reader's output can be split and sent to two independent access control boards simultaneously without either board affecting the other.
• High-Capacity Attendance Expansion: With 4 card readers connected, all reader data is routed through a single output, making large-scale simultaneous attendance check-ins efficient and seamless.

Technical Specifications

Wiring Notes

• WG1, WG2, and WG3 interfaces connect to +12V and GND. If one terminal is powered, it can supply power to the others.
• Each WG interface must be connected to D0, D1, and GND at minimum.
• All connected devices must share a common GND connection.

Common Use Cases

1. 2-in 1-out: Two card readers feeding a single access control board — ideal for two-way door access.
2. 4-in 1-out: Four card readers consolidated to one access control output for large-scale staff attendance.
3. Dual Authentication: Combine a face recognition machine and card reader; only matching identifications trigger door access.
4. 1-in 2-out Splitting: One card reader signal distributed to two independent access control boards simultaneously.

For general guidance on electronic safety and low-voltage wiring best practices, refer to OSHA Electrical Safety Standards.

Frequently Asked Questions

Q: What Wiegand formats does the HDC16 Wiegand Splitter Hub Module support?

A: The HDC16 supports a wide range of Wiegand formats by default, including WG26, WG32, WG34, WG35, WG36, WG37, WG40, WG42, WG44, WG66, WG80, as well as keyboard input — covering virtually all standard access control card readers.

Q: Can the HDC16 be used for dual authentication with a face recognition device and a card reader?

A: Yes. The HDC16 can be connected to both a face recognition machine and a card reader simultaneously. It compares the WG signals from both devices, and only sends an output signal to the access control motherboard when both identifiers match, enabling a reliable two-factor verification setup.

Q: What power supply does the Wiegand Hub Module require?

A: The HDC16 operates on a +9V to +24V DC power supply drawing 30mA. It is compatible with most standard access control system power supplies. If one terminal (WG1, WG2, or WG3) is connected to a +12V supply, it can provide power to the remaining interfaces.

Q: Can this module expand a one-way access control system to two-way door access?

A: Absolutely. The 2-in 1-out configuration allows you to connect two card readers (one on each side of a door) to a single access control board, effectively converting a one-way access control setup into a two-way swipe card door — without replacing your existing motherboard.