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Product Description
Siemens RDF870MB, S55770-T408
Touch Screen Flush-mount PM2.5 & IAQ Controller with RS485 Modbus
- AC 230 V operating voltage, large, backlit display
- Display and setpoint adjustment for PM2.5 and CO2 control
- Display of room temperature, outside temperature, VOC (volatile organic compound) and RH (relative humidity)
- Support 1-/3-/4-speed On/Off fan or DC fan output
- Two multifunctional inputs for external passive and DC 0…10 V sensors
- Operating modes: Comfort, Economy and Protection
- RS485 Modbus RTU slave mode
- Modbus commissioning via third-party tool, e.g. Modbus scan, Modbus poll, etc
- Mounting on recessed square 86 mm box or round 60 mm with 60 mm fixing centers and minimum 40 mm depth
- Color of housing: Ivory white (RAL 9001)
It provides the following additional functions:
- Setpoint adjustment and display for room temperature, VOC, RH and display of outside temperature
- Four remote digital outputs via bus and controlled by a master controller
- PM2.5 control only
- CO2 control only
- PM2.5 & CO2 controls (CO2 higher priority in control)
- Ventilation control
2x sensor inputs are selectable:
0: No function
1: Temperature (AI) (NTC 10k)
2: Temperature (AI) (0…10 V)
3: PM2.5 (AI) μg/m3 (0…10 V)
4: CO2 (AI) ppm (0…10 V)
5: VOC (AI) % (0…10 V)
6: VOC (AI) mg/m³ (0…10 V)
7: RH (AI) % (0…10 V)
8: Alarm input (DI)
9: Dummy AI (0…10 V) (RU only)
0: No function
1: Temperature (AI) (NTC 10k)
2: Temperature (AI) (0…10 V)
3: PM2.5 (AI) μg/m3 (0…10 V)
4: CO2 (AI) ppm (0…10 V)
5: VOC (AI) % (0…10 V)
6: VOC (AI) mg/m³ (0…10 V)
7: RH (AI) % (0…10 V)
8: Alarm input (DI)
9: Dummy AI (0…10 V) (RU only)
Datasheet
