Broadcast Electronics AM2.5E 2.5kW AM Transmitter

12-Channel Relay Interface Panel for Broadcast and AV Control

The BDI RLY-120 Relay Interface Panel is a relay utility module that lets you use a control closure to operate up to twelve relays, giving you a clean way to switch multiple circuits in broadcast facilities, RF sites, and AV control builds. It’s built for the moments when your control system needs more contact closures than it has outputs, or when one command needs to trigger multiple actions at once.

Single Closure Input to Trigger Up to 12 Relays

In T-Bar mode, the RLY-120 can take one closure input and fan it out so multiple relays activate together, which is ideal for interlocks and “all-on/all-off” control logic. This is especially useful in master antenna environments and other engineered systems where a single event must reliably trigger several downstream contact closures without complex custom wiring.

Individual Relay Control for Per-Channel Commands

When the job calls for independent switching, the panel can be configured to accept individual relay commands with each relay coil brought out to terminal blocks. That means you can treat the RLY-120 like a 12-channel relay bank, integrating it into automation, remote control, or engineered control chains where each relay is handled separately.

Pluggable Terminal Wiring That’s Faster to Install and Service

Relay outputs are routed to convenient pluggable terminals, helping installers keep wiring organized and making service work less painful when you’re troubleshooting under time pressure. In broadcast engineering and rack wiring, this kind of termination approach matters because it reduces rework, supports neat cable management, and simplifies changes during expansions.

SPDT Dry Contact Outputs for Flexible Switching

You get twelve sets of SPDT contacts (NO, C, NC), which makes the module versatile for a wide range of control and contact-closure tasks. These contacts are commonly used for equipment triggers, interlocks, remote switching, tally-style indicators, and other applications where reliable dry contact control is required.

5 VDC Power Requirements for Easy Integration

The RLY-120 runs on 5 VDC, making it a straightforward fit for many equipment rooms and control panels. With a properly rated 5V supply, you can power the relay bank reliably without introducing unusual power requirements into your rack or enclosure.

Designed for RF Combiner and Master Antenna Control Workflows

A common application is fanning out a single output from a BDI DPS-100D series power meter to multiple relays for RF combiner master antenna systems, and it also works well for solid-state to relay contact closure conversion in either T-Bar or individual control mode. If your facility needs one clean command to drive multiple downstream actions, this module is built for that job.