Bus thermo clock/hygrostat with display for connection to the RS485 bus gateway BGW14. For single mounting or mounting into the E-Design55 switching system. 80x80mm, 14mm high. Installation depth 33mm. With adjustable day and night reference temperatures and relative humidity. Illuminated display. Preset ready to operate. Data transmission and power supply takes place over the 4-wire bus with a 12V DC power supply unit. Only 0.1 watt standby loss.