Remotec ZXT-120 V1.6E - Manual (Page 24)

Q Can I use 2 or more ZXT-120 in my house? What is the max. units if yes?
A Yes and it is very depend on the capability of gateway / controller. For example,
gateway can supports up to 8, 16 or 32 ZXT-120 in a network.
Q How to avoid the IR interference if I am using 2 identical air-conditioners in same
location but want to control them individually?
A User can disable the Surround IR Output function, connect the external IR emitter and
aim it at the specific AC unit. The operating distance of external IR emitter is around
100cm (High power mode) and 50cm (Low power mode) but it is also depends on the
sensitivity of the IR receiver.
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External IR emitter cable