The Linear 302850 Multi-Code Two Channel Gate Receiver (model 3028-50) is a 300 MHz external radio receiver designed to add or restore remote control capability to gate operators, commercial door operators, and garage door openers. Operating on 12–24 VAC or VDC, it provides two independent relay outputs so you can control two separate operators or two functions on a single operator. This universal-style receiver works with Multi-Code fixed-code transmitters at 300 MHz, making it a practical replacement or upgrade for residential, commercial, and industrial applications that rely on the Multi-Code format.
Setup is straightforward: each channel has its own DIP switch bank so you match the receiver’s code settings to the corresponding Multi-Code remotes or keypads. Compatible devices include common 300 MHz Multi-Code transmitters such as 3089 one-button remotes, 3060 keychain remotes, 3070 two-button remotes, and Multi-Code 300 MHz keypads. The receiver’s dry-contact outputs wire to the operator’s push-button/activation inputs, enabling momentary control without altering the operator’s logic. For best performance, power the unit from the operator’s accessory power, mount in a suitable enclosure or within the operator housing, and orient the antenna for clear line-of-sight. This receiver uses the fixed-code Multi-Code format and is not compatible with Linear MegaCode, Delta-3, LiftMaster/Chamberlain Security+, Genie Intellicode, or other rolling-code systems. Always install in accordance with the gate or door operator’s instructions and applicable safety standards (e.g., UL 325), including the use of appropriate entrapment protection devices.