Siemens RDF302 Flush-mounted room thermostats with RS485 Modbus communications Siemens RDF302 Flush-mounted room thermostats with RS485 Modbus communications RS485 communicative interface in Modbus RTU slave mode ∂ Backlit display ∂ 2P / PI / P control ∂ Outputs for on/off or 3-position control ∂ Outputs for 3-speed or 1-speed fan ∂ 2 multifunctional inputs for keycard contact, external sensor, etc. ∂ Operating modes: Comfort, Economy and Protection ∂ Automatic or manual fan speed control ∂ Automatic or manual heating/cooling changeover ∂ Minimum and maximum limitation of room temperature setpoint ∂ Control depending on the room or the return air temperature ∂ Adjustable commissioning and control parameters via local HMI or RS485 Modbus ∂ Mounting on recessed square conduit box, 60.3 mm fixing centers ∂ AC 230 V operating voltage ∂ User and parameter settings can be retained or restored with power loss อ่านเพิ่ม