PTM 535Z enables the realization of energy harvesting wireless switches for EnOcean systems communicating based on the 2.4 GHz IEEE 802.15.4 radio standard. PTM 535Z is primarily intended for operation in conjunction with the EnOcean ECO 200 energy harvester. ECO 200 can be either mechanically connected using two contact pairs or wired to the electrical interface of PTM 535Z. Radio channel and security mode can also be selected using the hardware configuration interface.