ZB4-280-BT1 Eaton Overload Relay

ZB4-280-BT1 is a battery module designed to provide data memory backup power for all MI4 HMI devices. It maintains stored configuration and operational data during main power interruption. The unit serves exclusively as a memory retention component and is not intended for primary power delivery or system operation. Compatibility is limited to the MI4 series of human-machine interfaces. No electrical ratings, voltage specifications, capacity values, or service life metrics are provided in the source information.