Add tally to your ATEM switcher with Blackmagic Design's GPI and Tally Interface! With 8 contact closure tally outputs, you can send a tally signal to your cameras, replay machines and monitors so everyone knows which camera is 'on-air'! If you need more tally outputs, simply connect multiple GPI and Tally Interfaces…
Add tally to your ATEM switcher with Blackmagic Design's GPI and Tally Interface! With 8 contact closure tally outputs, you can send a tally signal to your cameras, replay machines and monitors so everyone knows which camera is 'on-air'! If you need more tally outputs, simply connect multiple GPI and Tally Interfaces together because it connects via Ethernet to your ATEM production switcher.
The network interface connects the ATEM switcher to lighting control systems, cameras, playback servers, or monitors. Eight optically isolated inputs and eight relay outputs can be expanded with additional units as needed.


Tally commands are transmitted from a compatible ATEM switcher over the Ethernet network. Connected equipment is connected via a 25-pin D-Sub breakout cable; a pair of network ports facilitates daisy-chain connections of multiple units.
Eight signaling ports: The GPI and Tally Interface is an Ethernet device with eight outputs featuring relay contacts for light signaling from the control room. Tally signals are sent over the network from ATEM series switchers to units connected to the same network.
Devices that support signaling via relay contacts—such as studio monitors or camera chains—can be connected via a breakout cable. This allows each operator to immediately see which source is currently on air.
For larger control rooms: up to eight devices can be connected to a single unit. If more contacts are needed, additional interfaces can simply be added to the Ethernet network.
The GPI inputs are optically isolated and support up to 5 V at 14 mA. The relay outputs are designed to switch up to 30 V at 1 A.
The Blackmagic Design GPI and Tally Interface is an essential accessory for ATEM studio switchers, enabling the distribution of tally signals to cameras and other devices. For full functionality within the production workflow, it is essential to connect it to compatible switchers, cameras that support the tally protocol, and the appropriate cabling.
Production Consoles and Video Interfaces - Core devices in the Blackmagic Design ecosystem that generate or process tally signals.
Studio and Broadcast Cameras - Cameras fully equipped to receive tally signals and indicate on-air status in a professional environment.
Digital film cameras - Pocket and PYXIS series cameras that can be integrated into studio setups with tally support via SDI/HDMI.
Cabling and Connectivity - Essential connectors for distributing signals between interfaces and end devices.
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