SIEMENS RDS120-B Smart Thermostat Instructions

SIEMENS RDS120-B Smart Thermostat

Smart Thermostat

RDS120-B Submittal Sheet
Advanced cloud connected thermostat for light commercial and residential applications

• Bacnet over IP Certified
• Controls conventional HVAC systems up to 3H/2C and heat pumps up to 4H/2C
• Easy-to-read, backlit, auto-dimming 3.5-inch, color, LCD touchscreen
• Intuitive remote user control using Apple iOS and Android mobile phone applications
• One-touch green leaf button to maximize energy efficiency
• Built-in Volatile Organic Compounds (VOC) sensor enables ventilation strategies for optimum indoor air quality
• Built-in humidity sensor
• Built-in occupancy sensor enables occupancy control
• Easy-to-program user schedule

Thermostat Highlights

• Easy to understand tri-level air quality indication: “Good”, “Okay”, “Poor”
• Inputs for remote or averaging temperature and humidity sensors
• Password protected screen lock
• PID algorithm for precise control
• Advanced energy saving control with free cooling capability
• Two multifunctional inputs, optional and configurable for:
  • Room temperature
  • Operating mode switch
  • Window / door contact
  • Outside air temperature
  • Room air humidity
  • Presence detector
  • Room air quality
• Six relay outputs for:
  • Conventional systems up to 3H/2C
  • Heat pumps with up to 2 compressors and 2 stages of auxiliary heat
  • Humidity or ventilation control
• Guided Setup Wizard
• Green Leaf button engages occupants in maximizing system efficiency. If the scheduled setpoint is overridden, the green leaf turns red. One touch returns the system to the programmed setpoint and the leaf returns to green.

Mobile App Features

• Support iOS and Android smartphones
• Full 7-day programmable schedule with three modes:
  • “Comfort”: comfort settings during occupied periods
  • “Economy”: setting for transition between “Unoccupied” and “Comfort”
  • “Unoccupied”: setting for periods during absence to maximize energy savings
• Duplicates thermostat HMI on smartphone screen
• User account management
• Monitor room conditions
• Data security with Siemens Cloud Computing Platform

Ordering Information

Associated Equipment

Technical data

Power Supply

Power Supply

Operating voltage| 24 Vac (±20%)
Frequency| 48 to 63 Hz
Power consumption| Max. 9 VA
Maximum power supply current| 4A current limited
Radio Parameter

Frequency band| 2.4 to 2.4835 GHz
Maximum radio-frequency power| 18 dBm
WLAN standard| IEEE 802.11b/g/n (HT20)
WLAN channel| 1-11

Inputs

Connections to Multifunctional Inputs X1 – M – X2

Passive temperature sensors|
– Cable length max. (copper cable| 300 ft (90 m) (16 AWG wire), 230 ft (70 m) (18 AWG

wire)

section)

– NTC type

| 200 ft (60 m) (18 AWG wire), 130 ft (40 m) (20 AWG

wire)

– Ni type| NTC10K Type 2 Thermistor
– Pt type| Ni1000 at 32°F (0°C) RTD
 | Pt1000_375/Pt1000_385 at 32°F (0°C) RTD
Connections to Multifunctional Inputs X1 – M – X2

Active DC 0 V to 10 V sensors| NOTE : min./max. configurable via parameters
– Room temperature range (default)| 32°F to 122°F (0 to 50°C)
– Outdoor temperature range (default)| -32°F to 176°F (-50 to 80°C)
– Humidity range (default)| 0 to 100%
– CO2 range (default)| 0 to 2000 ppm
Digital contacts|
– Operating action| Selectable N.O./N.C.
– Contact sensing| DC 14 to 40 V, 8 mA (typical)
– Parallel connection| Max. 20 thermostats per switch
– Input function| Selectable

Outputs

Relay Contact Capacity

Voltage| 24 Vac (±20%)
Current| Min. 0.02 A, Max. 1A per output

Operational Data
Setpoint Range

• 45°F to 95°F (7°C to 35°C)

Built-in Room Temperature Sensor

Temperature range| Accuracy at 77°F (25 ℃)| Display resolution
32°F to 122°F| ±0.9°F or 0.5℃| 1°F (0.5℃)
Built-in Room Humidity Sensor

Humidity range| Accuracy at 77°F (25°F)| Display resolution
0% to 100%| ± 5% r.h.| 1%

Connections

Interfaces

Micro USB| A service port is provided for firmware upgrade
Wiring Connections

Screw terminals| Solid wires or prepared stranded wires: Max. 1 × 16 to 20 AWG
Standards, Directives and Approvals

BTL| BACnet Testing Laboratory
RCM conformity| A5W90002477*
FCC standards| FCC CFR 47 Part 15 Subpart C
IC standards| RSS-247 issue 1 May 2015, RSS-GEN issue 4 November

2014

UL| UL916
Environmental compatibility| The product environmental declaration A5W90003412* (RoHS compliance, materials composition, packaging, environmental benefit, disposal).

• The documents can be downloaded from http://siemens.com/bt/download.

General Data

General

Dimension| H 3.58” × W 3.58” × D 1.02”
Weight| Thermostat with package, user document and accessory| 15.3 oz (435 g)
Thermostat| 9.5 oz (268 g)

Issued by
Siemens Industry, Inc. Smart Infrastructure 1000 Deerfield Pkwy Buffalo Grove IL 60089 Tel. +1 847-215-1000
© Siemens Industry, Inc., 2019
Technical specifications and availability subject to change without notice.

References

• Smart Information Delivery

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