(a) An ECP-EOT device shall, at a minimum, serve as the final node on the ECP brake circuit, provide a cable terminal circuit, and monitor, confirm, and report train, brake pipe, and train line cable continuity, cable voltage, brake pipe pressure, and the status of the ECP-EOT device battery charge. The ECP-EOT device shall transmit a status message (EOT Beacon) at least once per second, contain a means of communicating with the HEU, and be equipped with a brake pipe pressure transducer and a battery that charges from the train line cable.

(b) A railroad shall not move or use a freight train equipped with an ECP brake system unless that train is equipped with a functioning ECP-EOT device designed and operated in accordance with this subpart. The ECP-EOT device must be properly connected to the network and to the train line cable at the rear of the train.

(c) A locomotive equipped with ECP brakes can be used in lieu of an ECP-EOT device, provided it is capable of performing all of the functions of a functioning ECP-EOT device.

(d) Exception. A freight train operating in ECP brake mode is excepted from the end-of-train device requirements contained in subpart E of this part, provided that it is equipped with an ECP-EOT device complying with this section.