An RX switch would only trigger the ALK Alarm Kit when the pushpad of the device is depressed.
Surface Vertical Rod (SVR) Devices such as the 2227, 33/3527A, 98/9927, and 98/9957 devices could be operated by moving the rods directly instead of operating the push pad which would not trigger an RX switch, but would trigger an LX switch.
Von Duprin recommends either;
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