What does the EX1 do?

The EX1 Port Expander allows you to connect up to 3 additional full-duplex/half-duplex/simplex radios to the RC210 while using only 1 Port on the RC210 itself. Each additional Port is enabled/disabled by the Logic Outputs (UF) of the RC210 and may be used individually or simultaneously.

Additionally, the EX1 may be used to link more than one RC210, effectively providing more Ports to be used any way you need.

Can I use the EX1 to connect more repeaters to my RC210

The EX1 only supports simplex/half-duplex and non-repeating full-duplex radios

I don't own an RC210. Can I use it with my other brand repeater controller?

As long as your controller will accept and Active Low COS (and CTCSS) signal and has logic outputs that are also Active Low (used to enable the 3 additional Radio Ports the EX1 provides), the EX1 should work just fine with it

Can I use the EX1 to connect more than 1 RC210 together?

Yes! Technically, you can link as many RC210s together with as many EX1s as you like.

How to use an EX1 to link 2 RC210s is shown in the EX1 Manual

Click here to look