Differences Between the TM751 and RR501
What is the difference between the RR501 and the TM751?
Both Transceivers receive RF commands from a Remote, Motion Sensor, or Firecracker Interface and transmit the command on the powerline.
The RR501 will respond to powerline commands. The TM751 will not.
The RR501 has a 1-or-9 switch, which designates which Unit Code the Transceiver will respond to (activating its relay). The TM751 is hardwired to Unit Code 1 and cannot be changed.
The RR501 does not lock up if it hears its own signal from another transceiver; this is occasionally a problem with multiple TM751s. Unplug and replug each TM751 to fix lockups.