SIEMENS DXR2.M18 Room Automation Station Owner’s Manual

: June 9, 2024
: SIEMENS

Table of Contents

SIEMENS DXR2.M18 Room Automation Station
Features
Preconfigured applications
Functions
Type summary
Product Documentation
Technical data
- Conformity
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

SIEMENS DXR2.M18 Room Automation Station

SIEMENS-DXR2M18-Room-Automation-Station

Automation station with increased functionality and flexibility to support the demands for standard control of terminal HVAC equipment and Total Room Automation (TRA) applications. TRA offers the highest level of flexibility for energy-optimized solutions without sacrificing comfort.

Compact, programmable room automation stations for HVAC, lighting, and shading.
BACnet MS/TP Communication (BTL certified).
KNX PL-Link bus to connect sensors, actuators, and operator units (including bus power).
USB interface.
Operating voltage AC 24V.
Mounted on standard DIN rails or on the wall.
Plug-in terminal blocks.

Features

Total Room Automation applications combining multiple disciplines (HVAC, lighting, blinds/shading) into one comprehensive solution.
BTL Listed as a BACnet Advanced Application Controller (B-AAC) device.
Fully programmable using block programming.
Proven, pre-loaded applications.
Operational modes (Comfort, Standby, Economy, Protection, and so on).

Preconfigured applications

Fan Coil Unit (FCU)

FAN COIL 2-Pipe CW/HW and HW Valves
FAN COIL 4-Pipe CW and HW Valves
FAN COIL staged DX Cooling and staged Heating
FAN COIL with CW and staged Electric Heat
FAN COIL–UNIT VENT with CW, HW and Outside Air Damper (OAD) control
FAN COIL–UNIT VENT with CW, ELEC and OAD control
FAN-COIL-UNIT VENT with DX, HW and OAD control
FAN COIL-UNIT VENT with DX, ELEC and OAD control

Chilled Beam

Chilled Beam Passive 2 Pipe Heating/Cooling and Radiator 1-Stage Electric

Heat Pump

HP Variable Speed, Two Stage Elec Heat and One Stage Elec Rad with OAD
HP Variable Speed, Water Source, HW Heat and Modulating Elec Rad with OAD
HP Single Stage, One Stage Elec Heat and HW Rad with OAD
HP Multi Stage, Two Stage Elec Heat and HW Rad with OAD
HP Multi Stage, Hot Gas Reheat, One Stage Elec Heat and HW Rad with OAD
HP Multi Stage, Ground Source, Hot Gas Reheat, One Stage Elec Heat and HW Rad with OAD

Additional Applications

Electrical terminal heating coils, PWM, single, multi-stage or analog
Terminal fans, single, multi-stage or analog
Chill water, DX or hot water coils and heating/cooling coils (2-pipe or 4-pipe)
Variable Air Volume (VAV), Dual Duct and Fan Powered VAV (FPB)
Radiant ceiling including Chilled beams, cooling, heating and heating/cooling (2-pipe or 4-pipe) control
Radiator/Baseboard: hot water, steam or electric
Lighting – up to four separated or overlapping zones
- Manual switching and dimming
- Occupancy control and Vacancy control
- Automatic Daylight Harvesting – step or constant level control
- Stairwell lighting
- Scene control
Blinds – one or two separate zones
- Manual control: Up, Down, Predefined positions
- Occupancy control and Vacancy control
- Glare Protection
- Energy efficiency functions including solar radiation optimization
- Slat angle
- Scene control

Pre-loaded Application Options

Fan coil unit

Single, multiple or variable speed fan control.
Outside air damper control with economizer.
Ventilation Control or Demand Control Ventilation (DCV) with separate outside air damper (OAD) setpoints for each operational mode.
Supply (discharge) air temperature control for modulation heating or cooling coils.
Dehumidification control.
Terminal coils: heating (hot water or electric), cooling (chilled water or DX) and heating/cooling coil (2-pipe or 4-pipe).
Radiant ceiling including Chilled beams and Radiator control.

Heat pump

Heat Pump compressors: Single, multiple or variable speed.
Air-to-air, water loop or ground water configurations.
Single, multiple or variable speed fan control.
Outside air damper control with economizer.
Dehumidification control.
Ventilation Control or Demand Control Ventilation (DCV) with separate outside air damper (OAD) setpoints for each operational mode.
Terminal heating coil (hot water or electric) or hot gas coil.
Radiant ceiling including Chilled beams and Radiator control.
Greenleaf energy efficiency determination and display.
Configurable plant operating modes (heating, cooling, warm up, cool down, flush/purge, and so on).

Functions

The selected application and its parameters as well as input and output configuration determine the room automation station’s functionality.
A detailed description of functionality is available in the ABT (Automation Building Tool) online help.

Communication

BACnet MS/TP
USB connection for service and commissioning, firmware download, and LAN access.
The following functions are available with the KNX PL-Link bus:
- Communication with room operator units, switches, sensors, actuators, and luminaires.
- Plug-and-play connection of Siemens field devices with KNX PL-Link.

Type summary

Product Number	SSN	Description	Inputs	Outputs

DXR2.M18-101B

(Version with 60 data

points*)

| S55376-C124| DXR2.M18 Room

Automation Station

| 2 DI, 4 UI| 8 DO Triacs, 4 AO 0 to 10V
DXR2.M18-101K

(Version with 60 data

points)

| S55376-C154| Smoke Control DXR2.M18 Room Automation Station| 2 DI, 4 UI| 8 DO Triacs, 4 AO 0 to 10V

Accessories

Product Number	Designation
985-124	499 ohm Resistor Kit

Product Documentation

Topic	Title	Document ID
Installation and mounting	DXR Installation Instructions	A6V10550039
Global datasheet*	DXR2 24V IP

DXR2 24V MS/TP

| N9205

N9207

Setup and commissioning| DXR VAV Start-up Procedures DXR FPB Start-up Procedures DXR FCU Start-up Procedures

Balancing Procedures

| A6V10665935 A6V10665938 A6V10665941

A6V10665943

Room Unit Datasheet| Wall mounted| A6V10394781
BTL listing| DXR PIC Statement| A6V10665948

Please see the Global datasheets for additional information not found in this submittal sheet.

Technical data

Housing

Color	RAL 7035 (light-gray)
Dimensions	180 mm (7.09 in) x 104.5 mm (4.11 in) x 59.5 mm (2.34 in)

Weight

Packaging

| ca. 360 g (12.69 oz)

ca. 40 g (1.41 oz)

Function data

Communication

A/D Resolution (analog in)

D/A Resolution (analog out)

| 14 Bits

12 Bits

Power data

Power supply

Operating voltage| AC 24V -15%/+20%
Frequency| 50/60 Hz
Internal fuse| 4 A irreversible
Transformer with secondary current limitation of max. 10 A or external secondary current fuse

Non-renewable fuse

Circuit breakers

| ****

Max. 10 A, slow

Max. 13 A, characteristic B, C, D as per EN 60898

Apparent power (VA) for transformer design

Base Model| Base load| Max. load Triac output AC 24V~

0.25 A each

| Max. load all Aux. outputs AC 24V~| Max. load KNX PL-Link (at 50 mA)| Max. load DC 24V+ (2.4

W) )

| Max. Allowed Power consumption including connected field

devices

DXR2.M18| 6| 8 x 6 = 48| 18| 4| 6| 70

Power for the Triac outputs must be reduced if the maximum load of 18 VA is required for AC 24V field supply on the DXR2.x18.

NOTE:
To calculate the total VA, add the Base Load + the number of Triacs + field supplies+ KNX PL-Link devices.
This cannot exceed the maximum power consumption. See the Wiring Guidelines for more information.

Inputs

Analog Inputs

A fixed value of 1 Ω is calibrated to correct line resistance.
Configurable default.

Digital Inputs

Contact voltage| Universal input: 18V

Digital input: 21V

Contact current| Universal input: 1.2 mA; 7.4 mA initial current

Digital input: 1.6 mA; 9.4 mA initial current

Contact resistance for closed contacts| Max. 100 Ω
Contact resistance for open contacts| Min. 50 kΩ

Outputs

Analog Outputs

0 to 10V| Max. 1 mA
Digital Outputs

Type (Switching outputs triacs)| High side

The Triac closes the contact to AC 24V

Switching voltage| AC 24V
Permissible load| 250 mA/6 VA per output (cos phi 0.35)

(500 mA/12 VA per output with PWM*)

Protection| Short-circuit proof
DC 24V output for field devices (1: V+)

Output voltage| DC 24V
Permissible load| 100 mA/2.4 W
Protection against overload| Short-circuit proof

Connections

Interfaces

MSTP| Interface type: RS485 Galvanic isolation: Yes

Baud rates: 9600, 19200, 38400, 57600, 115200

Protocol: BACnet over MS/TP

Short-circuit proof Protection against faulty wiring at max. AC 24V

USB (2.0)| Plug: Type B

Data rate: 12 Mbps

KNX PL-Link| Type: KNX TP1 PL-Link, galvanic isolation Baud rate: 9.6 kbps

Bus power: 50 mA

Short-circuit proof Protection against faulty wiring at max. AC 24V

Wiring connections

Pluggable screw terminals| Copper wire or copper strands with ferrules

1 x 0.6 mm dia. to 2.5 mm2 (22 to 14 AWG) or

2 x 0.5 mm dia. to 1 mm2 (24 to 18 AWG)

Copper strands without ferrules

1 x 0.6 mm dia. to 2.5 mm2 (22 to 14 AWG) or

2 x 0.5 mm dia. to 1.5 mm2 (24 to 16 AWG)

Slotted screws| Small 1/8” blade, tightening torque 0.6 Nm (0.44 lb-ft)
Wiring lengths for signals| KNX PL-Link 80 m (260 ft) with internal bus power or 300 m (990 ft) with external power supply

MS/TP 1,000 m (3,290 ft)

Signal lines 80 m (260 ft)

For inputs AI 100 KΩ, AI NTC10K, AI NTC100K:

30 m (100 ft) or 80 m (260 ft), if shielded.

KNX/PL-Link Network and Power Wriring.*

Cable configuration| 1 or 2 twisted pair

– Pair 1 red/black

– Pair 2 yellow/white

Alternative 18 AWG STP CMP (Belden 6320FE 8771000)

Conformity

CAUTION

National safety regulations
Failure to comply with national safety regulations may result in personal injury and property damage.
Observe national provisions and comply with the appropriate safety regulations.

Ambient Conditions and Protection classification

Climatic ambient conditions

● Transport and storage

● Operation

|

● Temperature -25 to 70°C (-13 to 158°F) Air humidity 5 to 95% rh.

● Temperature -5 to 45°C (23 to 113°F)/

-5 to 50°C (23 to 122°F)

Air humidity 5 to 95% rh.

Standards, Directives and Approvals

UL Listing| UL 916 PAZX – Conforms to UL916 9th and 10th Edition. UL 864 UUKL Smoke Control Equipment – Conforms to UL864 9th and

10th Edition. (Smoke Control ‘K’ variant only)

Suitable for plenum area installation| UL1995
Federal Communications Commission| FCC CFR 47 Part 15 Class B
CSA Compliance and cUL certification| C22.2 No. 205
Environmental compatibility

– RoHS Compliant

| The product environmental declaration contains data on environmentally compatible product design and assessments

(composition, packaging, environmental benefit, and disposal).

BACnet BTL Listing| BTL-AAC
CEC Title 24 Supported| —
ASHRAE 90.1 Supported| —
Quality| ISO 9001 (Quality)

Issued by Siemens Industry, Inc. Smart Infrastructure 1000 Deerfield Pkwy Buffalo Grove IL 60089 Tel. +1 847-215-1000

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