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The XTB-IIR digital port will accept the same connector that would normally be plugged into the X10 TW523 or PSC05. The XTB-IIR opto-isolated digital interface is functionally identical to that of the TW523, but the XTB-IIR TW523 emulation differs from the actual TW523 in several regards. The XTB-IIR error checks all incoming data, and does not produce any output when a collision is detected. And since the XTB-IIR does not need a gap to separate X10 messages, it will recognize all commands in a bright/dim sequence. The XTB-IIR will both transmit AND receive extended messages, and it can also repeat the “doublet” extended messages produced by the CM15A.

A major upgrade to the XTB-IIR firmware in 2013 added several new features. Now it is easy to check the status of any mode option directly on the LED. The new version also includes the ability to prevent repeating commands on selected housecodes, which can be handy when two X10 homes share the same utility transformer.

See the XTB-IIR Mode Options document for a detailed description of the available mode options.
The XTB-IIR is a high-power 2-phase X10 repeater. It is a significant enhancement of the discontinued XTB-II two-phase unit. The XTB-IIR has two coupling networks to drive high power signals onto both phases. The X10 Boost input on the cover will directly boost the output of an X10 transmitter. Like the single-phase XTBR, the XTB-IIR will repeat any valid X10 commands it receives over the powerline.

The XTB-IIR also provides TW523 emulation to function as a powerline interface for high-end controllers such as the Elk M1 or the WGL V572A RF transceiver. With its larger power supply, the XTB-IIR delivers an even stronger signal than the XTBR. Its powerful transmitter delivers over 20 times the output power of typical X10 transmitters to greatly improve X10 automation system reliability. A single output 240V 50Hz version of the XTB-IIR is also available for international applications.

XTB-IIR High-Power 2-Phase Repeater