SIEMENS DXR2 E12P Series Compact Room Automation Stations Owner’s Manual

: October 30, 2023
: SIEMENS

Table of Contents

Introduction
Features
Use
Functions
Technical Design
Type Summary
Product Documentation
Notes
Warranty
Technical Data
Connection Terminals
Dimensions
Customer Support
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

SIEMENS DXR2 E12P Series Compact Room Automation Stations

Introduction

For building with increased demands placed on functionality and flexibility in Room Automation and VAV applications.

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

Features

Programmable
The DXR2… room automation stations provide the infrastructure for system and application specific functions and can be programmed.
Compact series
The compact build permits mounting in narrow spaces and on standardized rails, and is particularly well suited for compact panels or plants with integrated panel.
Plug-in terminal blocks
Plug-in terminal blocks to easily exchange room automation stations.

Use

Room automation applications combining multiple disciplines (HVAC, lighting, shading) into one comprehensive solution. Desigo TM room automation offers the highest degree of flexibility for energy-optimized solutions without sacrificing on comfort.
Room automation applications can be extended with lighting and blinds applications via the KNX PL-Link.

Preinstalled applications

Variable (VAV) and constant (CAV) air volume or variable air volume with a serial or parallel fan powered box
– with 2-stage electric heating
– with hot water
– with hot water and flow temperature control
Fan coil: Cooling or heating with heat pump, outside air control
– Single stage, multi-stage, or variable speed fan
– Single stage, multi-stage, or variable speed compressor
– Internal or external reversing valve
– Geothermal or water circuit source
– Optional hot gas reheater
– Optional electric (staged or modulating) or hot water reheated or hot gas reheater
Fan coil: Cooling or heating, cooling and heating (2-pipe) or cooling/heating (4-pipe), supply air minimum limitations, outside air control
Dual duct variable air volume (VAV)
– Cold air duct, hot air duct with configurable ventilation delivery
– Dual duct, dedicated configurable ventilation duct with hot water or electric heating coils
– Dual duct with constant volume option
Chilled beam active or passive cooling (2-pipe) or cooling/heating (2-pipe) or cooling/heating (4-pipe)
Radiant ceiling: Cooling, cooling and heating (2-pipe) or cooling/heating (4-pipe)
Radiator: Hot water, steam (2-pipe or 4-pipe) or electric stage controlled
Lighting: Up to 4 different zones
Blinds: 1 or 2 motors

Application options

Separate temperature and volume setpoints for all 4 operating modes
Singe-stage or variable ventilation control (fan powered box)
Chilled water and hot water valve (2-pipe or 4-pipe)
Extract air flow acquisition and control

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

2-Port Ethernet switch for cost-effective cabling via line topology.
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.
– Integration of common devices using KNX S-Mode (ETS engineering required).

LED indication

LED	Color	Activity	Function
RUN	Green	Steady ON	Device is ready for operation
Steady OFF	Device is not powered
Regular flashing	Start-up or the program is stopped
Red	Steady OFF	OK
Steady ON	Program error

Power off the device.
Power on the device.
Wait until the RUN LED lights up and turns off, then press the Service button.
Keep the Service button pressed until the RUN LED lights up, then release the button. The device restarts.
Wait until the device has fully started – unconfigured (green RUN LED on, flashes red)

Technical Design

Power supply
The power supply provides controlled voltages for inputs and outputs. The room automation stations also supply AC 24 V field supply (DXR2..18, DC 24V too). The supply is located in the device to simplify wiring and diagnostics.
The processor controls the power supply. This ensures clean conditions for field devices connected to the I/Os during startup, shutdown, and under voltage.
Bus power supply
The room automation station includes the bus power for KNX PL-Link. The bus power is switched on by default, but can be switched off via web interface or configuration in the Automation Building Tool (ABT).
The internal KNX PL-Link supply cannot be operated parallel to external power supplies. The internal KNX PL-Link power must be switched off during the engineering phase for external power. This is typically the case if the 50 mA from the internal supply is not enough to supply all devices connected on the KNX PL-Link bus.

Type Summary

The devices are supplied without terminal covers. The terminal covers must be ordered separately. See Accessories.
Order numbers : World (excluding the U.S. and Canada) Individual packages

Type	Stock number	Applications	Inputs	Outputs

DXR2.E12P-102A

(Version with 30 data points)

| S55376-C108| Variable air volume, dual duct VAV, fan- powered box, radiant ceiling, radiator,

4 luminaires & 2 blinds

| 1 DI, 2 UI,

ΔP sensor

| 6 Triacs, 2 AO
DXR2.E12PX-102A

(Version with 60 data points)

| S55376-C143| Variable air volume, dual duct VAV, fan- powered box, radiant ceiling, radiator,

4 luminaires & 2 blinds

| 1 DI, 2 UI,

ΔP sensor

Order numbers : World (excluding the U.S. and Canada) Bulk packages (18 pieces)

Type	Stock number	Applications	Inputs	Outputs

DXR2.E12P- 102A/BP
(Version with 30 data points)| S55376-C163| Variable air volume, dual duct VAV, fan- powered box, radiant ceiling, radiator,
4 luminaires & 2 blinds| 1 DI, 2 UI,

ΔP sensor

Order numbers U.S. and Canada Individual packages only

Type	Stock number	Applications	Inputs	Outputs

DXR2.E12P-102B

(Version with 30 data points)

| S55376-C126| Variable air volume, dual duct VAV, fan- powered box, radiant ceiling, radiator,
4 luminaires & 2 blinds| 1 DI, 2 UI,

ΔP sensor

| 6 Triacs, 2 AO
DXR2.E12PX-102B

(Version with 60 data points)

| S55374-C252| Variable air volume, dual duct VAV, fan- powered box, radiant ceiling, radiator,
4 luminaires & 2 blinds| 1 DI, 2 UI,

ΔP sensor

Accessories

Type	Stock number	Designation
DXA.H180	S55376-C120	Terminal cover for DXR.. 180 mm, 2 pieces

Product Documentation

Topic	Title	Document ID:
Engineering, mounting and installation	Desigo TM Room Automation	CM111043
Engineering and commissioning, workflow	ABT online help	n/a
Commissioning	Desigo Raumautomation – Setup and Service Assistant	CM111050
Product environmental declaration	Product environmental declaration 230 V

CM1E9204
Product environmental declaration| Product environmental declaration 24 V| CM1E9205

Related documents such as the environmental declarations, CE declarations, etc., can be downloaded from the following Internet address: https://siemens.com/bt/download

Notes

Safety

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.

Engineering

Identification
Each device has a unique serial number to ensure efficient commissioning. It is provided on the adhesive barcode label. The serial number can be read directly into the engineering tool using a barcode reader.
Wiring
Wiring must be sufficiently insulated to the available rated voltage. Sizing and fusing of the wiring depends on the connected load.

Triac outputs AC 24 V

Individual Triac outputs may have a max. load of 6 VA (heating up the device). The following possibilities are permitted:

Multiple motorized actuators with a total of max. 6 VA.
1 thermal actuator with 6 VA start load in a cold state, controlled using the algorithm PWM 0…100%.
2 thermal actuators with 6 VA start load each in a cold state, controlled using the algorithm PWM 5…50%.

For transformer design (voltage drop off), each thermal actuator must be counted at the full start load, since the Triac outputs can be freely controlled.
The heating sequence and cooling sequence are not normally active at the same time (Exception: Downdraft compensation).
The sum total of the base load, bus power, field supply, and Triacs may not exceed 72 VA (DXR2.E..) or 70 VA (DXR2.M..). Power consumption is 96 VA with pulse width modulation.
See Section Power data.
For the DXR2.. 24 V variant, the high side switch Triacs (closed the contact at AC 24 V) are used. As a result, the VAV compact controllers GDB181.1E/3 or GLB181.1E/3 can only be set to operating mode “con” via 0…10 V.

DC 0…10 V outputs
The DC 0…10 V outputs supply max. 1 mA.
AC 24 V supply for field devices (V~)
Actuators (valves, dampers) and active sensors are supplied directly by the device. Separate AC 24 V power supply is only required if field devices consume more than 12 VA (on DXR2.x11.. and DXR2.x12..) or 18 VA (on DXR2.x18).
DC 24 V power supply for field devices (V+), DXR2.x18 only
Actuators (valves, dampers) and active sensors are supplied directly by the device. A separate DC 24 V field supply is only required if field devices use more than 2.4 Watts.
Digital inputs
Digital inputs are not suitable for operating lighting or blinds. Use the KNK PL-Link pushbutton.

Mounting

The room automation stations can be snapped onto standard rails or screwed onto a flat surface.

CAUTION

| Risk of overheating for failure to comply with ambient temperature

Burning and damage to the device

Ensure sufficient ventilation to comply with the permissible ambient temperature within the panel or installation box. The temperature must be 10° C (18° F) lower outside the installation box.

Mounting position

Ambient temperature -5…45 °C (23…113°F)| Ambient temperature -5…50 °C (23…122°F)
---|---

Overhead
Wall, vertically
– From top to bottom
– From bottom to top
On a horizontal surface

|

Wall, horizontal
– From left to right
– From right to left

Differential pressure sensor

Avoid bends and pressure when attaching the tube.
Connect the “+” connection on the side with the higher pressure and the “-” connection on the side with the lower pressure.
A tube length of 2 m (6 ft) is recommended.

Installation

WARNING

| Risk of fire and injury due to short circuits!

Adapt as per local regulations the wiring cross section to the rated value of the installed fuse.

Strain relief
Strain relief protects flexible electrical wiring against mechanical stress.
The wiring must be fixed using cable binders to the tabs on the housing base.
Terminal cover
Break off the cable inlets to insert the cables to the room automation station. To take off the terminal cover:

Operation

The outputs have no electricity when power fails.
USB communications that does not work points to improper grounding of AC 24 V operating voltage (connection ⏊ must be grounded).

Disposal

The device is considered an electronic device for disposal in accordance with European Directive and may not be disposed of as domestic waste.

Use only designated channels for disposing the devices.
Comply with all local and currently applicable laws and regulations.

Warranty

Technical data on specific applications is only valid on Siemens products. Siemens rejects any and all warranties in the event that third-party products are used.

Technical Data

Housing

Color	RAL 7035 (light-gray)
Dimensions	See Dimensions

Weight
DXR2.E18.. DXR2.E12P..
Terminal cover Packaging| ca. 350 g
ca. 330 g
ca. 80 g
ca. 40 g

Function data

Processor	Texas Instruments AM3352, 300 MHz
RAM	128 MByte SDRAM (DDR3)

512 MByte NAND Flash
Communication
A/D Resolution (analog in) D/A Resolution (analog out)| 14 Bit
12 Bit

Power data

Power supply

Operating voltage| AC 24 V -15%/+20%
Frequency| 50/60 Hz
Power consumption including connected field devices DXR2.E12P..
DXR2.E18..| Max. 60 VA

Max. 72 VA

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 load including I/O without load by field devices| Max. output load Triac at 250 mA each| Max. load for AC 24 V field supply at 500/750 mA| Max. load KNX PL-Link at 50 mA| Max. load for DC 24 V field supply at 100 mA| Power consumption including connected field devices
DXR2.E12P..| 8| 6 x 6 = 36
(72 with PWM )| 12| 4| –| 60
(96 with PWM )
DXR2.E18..| 8| 8 x 6 = 48
(88 with PWM )| 18| 4| 6| 84
(96 with PWM )

*) For thermal valve actuators (starting current) with pulse width modulation 5…50% and pulse length of ca. 1 s.
Power for the Triac outputs must be reduced if the max. load of 18 VA is required for AC 24
V field supply on the DXR2.x18…

Inputs

The inputs are protected against incorrect wiring AC 24 V.

Inputs: Overview

Type| Inputs
DXR2.E12P..| 1 DI, 2 UI, ΔP sensor
DXR2.E18..| 2 DI, 4 UI
Resistance sensor, analog (inputs X…)

Type| Range (over range)| Resolution
AI 1000 Ohm )| 1 kΩ (0.. 1.05 kΩ)| 1 Ω
AI 2500 Ohm )| 2.5 kΩ (0.. 2.625 kΩ)| 2.5 Ω
AI 10 kOhm )| 10 kΩ (0.. 10.5 kΩ)| 10 Ω
AI 100 kOhm )| 100 kΩ (0…105 kΩ)| 100 Ω
Temperature measurement, analog (inputs X…)

Type| Range (over range)| Resolution
AI PT1K 375 (NA) *)| -40…70 °C (-45…75 °C)

-40…158 °F (-49…167 °F)

| 25 mK

0.045 °F

AI PT1K 385 (EU) *)| -40…70 °C (-45…75 °C)

-40…158 °F (-49…167 °F)

| 25 mK

0.045 °F

AI (LG-)Ni1000 *)| -40…70 °C (-45…75 °C)

-40…158 °F (-49…167 °F)

| 25 mK

0.045 °F

AI Ni1000 DIN *)| -40…70 °C (-45…75 °C)

-40…158 °F (-49…167 °F)

| 25 mK

0.045 °F

AI T1 (PTC) *)| -40…70 °C (-45…75 °C)

-40…158 °F (-49…167 °F)

| 100 mK

0.18 °F

AI NTC10K

(Typ II / Beta (0-50 °C) = 3892 K)

| -40…70 °C (-45…75 °C)

-40…158 °F (-49…167 °F)

| 25 mK (25 °C)

0.045 °F (77 °F)

AI NTC100K| -10…70 °C (-15…75 °C)

14…158 °F (5…167 °F)

| 25 mK (25 °C)

0.045 °F (77 °F)

*) A fixed value of 1 Ω is calibrated to correct line resistance.

Voltage measurement, analog (inputs X…)

Type| Range (over range)| Resolution
AI 0…10 V| 0…10 V (-1…11 V)| 2 mV
AI 0…10 V standard| 0…100% (-10…110%)| 2 mV
Open connection: Negative voltage -1.5 V, 8 μA (line failure detection)
Digital input (inputs X… or D…)

Contact query voltage| Universal input: 18 V Digital input: 21 V
Contact query 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
Differential pressure sensor (inputs P1+, P1-)

Connections (nipple diameter)| 5.2 mm
Measuring range| 0…500 Pa
Overload range| 0…100 kPa
Measuring range accuracy Zero point accuracy Resolution| 4.5%

0.2 Pa 12 Bit

Outputs

The outputs are protected against short circuiting and incorrect wiring AC 24 V.

Outputs: Overview

Type| Outputs
DXR2.E12P..| 6 Triacs, 2 AO
DXR2.E18..| 8 Triacs, 4 AO
Analog (outputs Y10…Y40)

0% = 0 V, 100% = 10 V

(0.. 10.5 V)

| 2 mV| Max. 1 mA
Switching outputs Triac (outputs Y1…Y8)

Type| High side

The Triac closes the contact to AC 24 V

Switching voltage| AC 24 V
Permissible load| 250 mA / 6 VA per output (cos phi 0.35) (500 mA / 12 VA per output with PWM *)
Protection| Short-circuit proof

*) For thermal valve actuators (starting current) with pulse width modulation 5…50% and pulse length of ca. 1 s.

Supply for field devices (outputs V~)

Output voltage| AC 24 V
Permissible load

DXR2.x11.. und DXR2.x12P.. DXR2.x18..

|

500 mA / 12 VA overall

750 mA / 18 VA overall

Protection against overload| Short-circuit proof
Power supply for field devices on DXR2.x18 (output V+)

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

Connections

Interfaces

Ethernet| Plugs: 2 x RJ45, screened

Interface type: 10Base-T/100BASE-TX, IEEE 802.3 compatible Bitrates: 10/100 Mbps, autosensing

Protocol: BACnet over UDP/IP

USB (2.0)| Plug: Type B

Data rate: 12 Mbps

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

Bus power: 50 mA

Short-circuit proof, and protected against faulty wiring at max. AC 24 V

Wiring connections

Pluggable screw terminals| Copper wire or copper stranded wire with connector sleeves 1 x 0.6 mm ø to 2.5 mm2 (22 to 14 AWG) or

2 x 0.6 mm ø to 1 mm2 (22 to 18 AWG)

Copper stranded wire without connector sleeves 1 x 0.6 mm ø to 2.5 mm2 (22 to 14 AWG) or

2 x 0.6 mm ø to 1.5 mm2 (22 to 16 AWG)

Stripping length| 6…7.5 mm (0.24.. 0.29 in)
Slotted screws| Size 1, 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

Ethernet 100 m (330 ft)

Signal lines 80 m (260 ft)

For inputs AI 100 kOhm, AI NTC10K, AI NTC100K: 30 m (100 ft)

or 80 m (260 ft), if shielded.

Conformity

Ambient conditions and protection classification

Classification per IEC/EN 60730

Function of automatic control devices Pollution degree

Overvoltage category

| Type 1

2

III

Design type| Device suited for use with equipment of safety classes I and II
Degree of protection of housing to IEC EN 60529 Room automation station With terminal cover| IP20 IP30
Climatic ambient conditions

Transport (packaged for transport) as per IEC EN 60721-3-2
Operation as per IEC/EN 60721-3-3

|

Class 2K3
Temperature -25…70 °C (-13… 158 °F)
Air humidity 5…95% (non-condensing)
Class 3K5
Temperature -5…45 °C (23… 113 °F)/ -5…50 °C (23… 122 °F)

See Mounting

Air humidity 5…95% (non-condensing)

Mechanical ambient conditions

Transport as per IEC/EN 60721-3-2 Operation as per IEC/EN 60721-3-3

| Class 2M2 Class 3M2
Standards, directives and approvals

Product standard| IEC/EN 60730-1

Automatic electronic controls for household and similar use

Product family standard| EN 50491-2, EN 50491-3, EN 50491-5

General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS)

Electromagnetic compatibility| For residential, commercial, and industrial environments
EU conformity (CE)| EU declaration of conformance DXR2.. AC 230 V, see CM1T9204xx_1

EU declaration of conformance DXR2.. AC 24 V, see CM1T9204xx_2

RCM conformity| RCM declaration of conformance DXR2.. see CM1T9204xx_C1
EAC compliance| Eurasien compliance for all DXR2.xxx-xxxA variants
UL Approbation

Federal Communications Commission

| UL as per UL916, http://ul.com/database cUL as per CSA – C22.2 No. 205

FCC CFR 47 Part 15 Class B

Standards, directives and approvals

BACnet| BTL listed, BACnet Advanced Application Controller (B- AAC)

BACnet Protocol Revision 13

Environmental compatibility| The product environmental declaration () contains data on environmentally compatible product design and assessments (RoHS compliance, materials composition, packaging, environmental benefit, disposal).

See Section Product documentation.

Quality| ISO 9001 (Quality)
eu.bac certification

See product list at: http://www.eubaccert.org/licences-by-criteria.asp

Connection Terminals

DXR2.E12P

Terminal	Symbol	Description	Module	Channel
1, 2 Ethernet		2 x RJ45 interface for 2-port Ethernet switch
11, 12 KNX

+, –

| KNX connection| |
31…36 inputs|

D1

| Digital input| 1| 1

X1, X2

| Universal input| 1| 5,6
⊥| System zero| |

V~

V~

| Power SELV / PELV AC 24 V| |

⊥

| System zero| |
61…69 Triacs|

Y1…Y6

| Switching output AC 24 V| 11| 1…6

⊥

| System zero| |
81…84 analog outputs|

Y10, Y20

| Positioning output DC 0…10 V| 21| 1, 2

⊥

| System zero| |

V~

| Field supply AC 24 V| |
ΔP differential pressure detector|

P1+

| Connected to the higher pressure| 31| 1

P1-

| Connected to the lower pressure|

31

|

1

Service|

SVC

| Service button| |
Display|

RUN

| Operation LED| |

DXR2.E18

Terminal| Symbol| Description Module| Channel
---|---|---|---
1, 2 Ethernet| | 2 x RJ45 interface for 2-port Ethernet switch| |
11, 12 KNX|

+, –

| KNX connection| |
31…41 inputs|

D1, D2

| Digital input| 1| 1, 2

X1…X4

| Universal input| 1| 5…8

⊥

| System zero| |

V~

| Field supply AC 24 V for active sensors| |

V+

V~

| Power SELV / PELV AC 24 V| |

⊥

| System zero| |
61…72 Triacs|

Y1…Y8

| Switching output AC 24 V| 11| 1…8

⊥

| System zero| |
81…88 analog outputs|

Y10…Y40

| Positioning output DC 0…10 V| 21| 1…4
⊥| System zero| |

V~

| Field supply AC 24 V| |
Service|

SVC

| Service button| |
Display|

RUN

| Operation LED| |

Dimensions

Without terminal cover
With terminal cover

Customer Support

© Siemens Switzerland Ltd, 2013
Technical specifications and availability subject to change without notice.
Issued by
Siemens Switzerland Ltd
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
+41 58 724 2424
www.siemens.com/buildingtechnologies