There are no relays, the R2LC has a single smoke triac. However, for the Veranda, the two smoke units are controlled by a microprocessor on the custom motherboard, the smoke triac on the R2LC in the Veranda is wired to the cab light. Try it, turn on "smoke" the conventional way with AUX1/9 and the cab light comes on, turn it off with AUX1/8, and the cab light goes off.
That's also why the Veranda has unique smoke controls. While the smoke fans are controlled automatically, you have independent control of them by command control. These commands are not processed by the R2LC, but rather by the motherboard microprocessor.
