Siemens DESIGO RXT20.1 Bedienungsanleitung

Building Technologies RXT20.1 – Service terminal CA2N3851en_02 / 12.01.2007

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3851

DESIGO™ RX

Service terminal RXT20.1

•Hand-held service terminal with built-in connecting cable

•Controller and room unit status display

•Remote operation of DESIGO RXB and RXC room controller service pins

•NOT SUITABLE FOR RXB VERSION 2.36 AND HIGHER

•Error message display

•Room temperature display, operating mode and temperature setpoint

adjustment

•PPS2 interface to controller

•Socket for commissioning and service too

The RXT20.1 service terminal is used for simple diagnostics of room controllers and

room units, and for remote operation of the DESIGO RXB and RXC controller service

pins. The built-in connecting cable of the service terminal is plugged directly into the

roomcontroller to be interrogated, or into the room unit of the controller concerned.

The service terminal displays the status of the controller and room unit, the “wink” func-

tion, error messages or additional information of the room unit.

The service pin of the connected DESIGO RXB / RXC controller can be operated re-

motely with the function keys on the service terminal. This function is especially useful

for addressing controllers installed in concealed locations.

The service terminal also incorporates a RJ45 socket for the bus

–RXC: for RXT10 commissioning and service tool (LONWORKS® bus connection)

–RXB: for KNX / EIB bus connection (not for Version 2.36 and higher).

When placing an order, please specify the quantity, product name and type code.

Example:

1 Service terminal RXT20.1

Essentially, the service terminal consists of the housing, the base plate and the cable for

connection to the controller or room unit. The housing and the base plate are connected

by a snap-fitting mechanism.

Use

Ordering

Mechanical design

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The housing accommodates a printed circuit board, the function keys, LCD and a socket

for the commissioning and service tool.

Connecting cable

Base plate

Housing

80444

80084

Socket for RXT10 commis-

sioning and service tool

90044 A

Service -

Landis & Staefa

Error

Displays room unit status, “wink” function, error messages or additional

information of the room unit

Function key 1: Error message display

Cursor: Controller status indication

Function key 2: Displays remote operation of service pin and additional

information of the room unit

Action Description

Press + or – key

Error

Press once to display any existing error messages.

The error with the highest priority is displayed for 5 s.

For error codes see “LCD display”

Action Description

Press left key

Service

The service pin is used to address the controllers when commis-

sioning the system.

– RXC: refer to the RXT10 user manual, document CA2110338

– RXB: refer to the ETS manual.

This function of the service terminal is especially useful for ad-

dressing controllers in concealed locations where direct access to

the service pin is difficult. For this purpose, the service terminal is

connected to the room unit of the controller concerned.

Press this key on the left side for at least 1.5 s for remote opera-

tion of the service pin of the connected DESIGO RXB / RXC con-

troller.

While service-pin operation is in progress, the LCD display is

blank. The controller, room unit and service terminal will then re-

start (ready for operation after approx. 3 – 5 minutes*)

* Varies according to the DESIGO RX application

Press right key

1st key press Room temperature display in °C

2nd key press Room temperature display in °F

3rd key press Setpoint adjustment display in °C

4th key press Setpoint adjustment display in °F

5th key press Return to original display (e.g. “run”)

Elements for operation

and display

Function key 1:

Function key 2:

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If the service terminal is connected to a DESIGO RXB / RXC controller, the start-up rou-

tine is as follows:

Step Display Description

All segments activated for approximately 5 s.

Cursor fields may be activated for max. 10 s.* (approx.

3 – 5 minutes * on controller power up, e.g. after operation of

service pin)

* Varies according to the DESIGO RX application

Controller ready for operation (“run” and cycling cursor)

Display Description

Normal operation between controller and room unit

•Display reads “run”

The room unit with the set address (see Address switch) communi-

cates with the controller. The “run” display can be overwritten by

other displays (see Additional information).

•Cycling cursor, 1 s pulse

The controller communicates (or tries to communicate).

no communication, or controller not ready

•Static display in all cursor fields

There is no room unit connected or the controller is not ready for

operation, but the power supply is working (controller in start-up

phase, or no application loaded, or controller not configured).

Faulty controller:

•No display

The power supply is not connected or the controller is faulty.

Display Description

Wink command

•Controller type displayed for 64 s (e.g. RXC30.1: “r.30”

or RXB21.1: "r.21")

Press the right key (Function key 2) to switch back to the original

display before expiry of the 64 s. The display of the wink command

takes priority over all other display options on the service terminal.

The wink command can be used during commissioning to identify

the currently addressed controller.

–RXC: see RXT10 user manual, document CA110338

–RXB: see ETS user manual

Room temperature, operation mode

•Room temperature in °C or °F (see "Function key 2")

The displayed operation mode (Stand-by, Auto, fan speed) comes

from the room unit.

The same applies to the displayed room temperature, there is no tem-

perature sensor in the service terminal itself.

LCD display

Response at start-up

dditional information

CA2N3851en_02 / 12.01.2007 RXT20.1 – Service terminal Building Technologies

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Temperature setpoint

•Temperature setpoint in °C or °F (see "Function key 2")

The displayed temperature setpoint comes from the room unit.

Display Description

The address of the service terminal has not been set correctly (see

“Hex switch”).

Dynamic error messages are displayed for 5 s when they occur. The error message

remains in memory while the error persists. The message can be re-displayed for 5 s

using Function key 1. If there is more than one error, the error with the highest priority

will be displayed. The table below shows the error messages in order of priority.

Display Description

There has not yet been any communication between the room unit and

the controller (e.g. during the controller power-up phase)

The controller does not recognise the room unit type.

C: Communication between controller and room unit is interrupted.

02: Firmware version of the service terminal (e.g. Version 2.0)

Error (open circuit or short circuit) affecting the potentiometer or tem-

perature sensor of the connected room unit.

Display Description

Room temperature in °C or °F (see “Function key 2”)

The displayed room temperature is the temperature measured by the

room unit; there is no temperature sensor in the service terminal itself.

The service terminal must have the same PPS2 address as the room unit (address

1 … 12) in order to display any of the information described above. The QAX3… room

units are all factory-set to Address 1. The service terminal is also factory-set to Ad-

dress 1.

The address can be changed if necessary:

– Service terminal: hex switch on the back of the housing; remove base plate for access

– Room unit: Address plugs.

If an invalid address is set (e.g. “0”), the error message “E16” will be displayed.

If the address of the service terminal and the room unit are not the same, or if several

devices are communicating, the "normal operation" display will show 12 extra points

(one for each possible address). The points that stand for actively communicating de-

vices are flashing.

The device includes electrical and electronic components and must not be disposed

of as domestic waste.

Current local legislation must be observed.

Static error messages

Dynamic error mes-

sages

Room temperature

Address switch

Note

Disposal

Building Technologies RXT20.1 – Service terminal CA2N3851en_02 / 12.01.2007

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Power supply Operating voltage

The service terminal receives its supply from the

connected controller via the PPS2 interface

(SELV low voltage in accordance with HD 384)

DC 12 ... 15 V

Power consumption (controller) Max. 0.10 VA

Function data Display

Type LCD

Functions displayed – Controller and room unit status

– Wink function

– Additional information of the room unit

Function keys – Function key 1: Error message display

– Function key 2: Remote operation of service

pin and display of additional information of

the room unit

Interfaces Interface between controller and service terminal PPS2 (point-to-point interface, Version 2)

Baud rate 4.8 kBit/s

Cable connections Cable for connection to controller or room unit Built-in

Cable length Approx. 15 cm

Housing protection standard Protection standard to EN 60529 IP 30

Protection class Insulation protection class III

Environmental conditions Operation IEC 721

Climatic conditions Class 3K5

Temperature 0 ... 50 °C

Humidity < 85 %rh

Mechanical conditions Class 3M1

Transport IEC 721

Climatic conditions Class 2K3

Temperature – 25 ... 70 °C

Humidity < 95 %rh

Mechanical conditions Class 2M2

Industry standards Electromagnetic compatibility

Interference immunity EN 61000-6-2

Emitted interference EN 61000-6-3

Meets the requirements for CE marking:

EMC Directive 89/336/EWG

Dimensions see “Dimensions”

Colour Housing cover NCS 0502-Y14R

Operator controls RAL 7035

Weight Excluding packaging 0.13 kg

3851A01

PPS2

Tool

7812 4321

C–

C+

CP–

CP+

Bus

PPS2

RJ45

ca. 15 cm

Bus

R1 RXT20.1 service terminal

A Connection to DESIGO RXB /

RXC controller or QAX…

room unit

B Bus connection:

RXC for RXT10 commission-

ing and service tool

RXB for KNX / EIB bus

Technical data

Internal diagram

CA2N3851en_02 / 12.01.2007 RXT20.1 – Service terminal Building Technologies

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3206Z01

2345678

1 LONWORKS® -Bus (DESIGO RXC): CLA; EIB-Bus (DESIGO RCB): CE+

2 LONWORKS® -Bus (DESIGO RXC): CLB; EIB-Bus (DESIGO RCB): CE–

3 Not used

4 Not used

5 Not used

6 Not used

7 CP+ PPS2 data

8 CP– PPS2 data

The same pin layout applies to the tool socket.

The built-in connecting cable with an RJ45 connector is used to connect the service

terminal to the tool socket of a DESIGO RXB / RXC controller, or to a QAX… room unit.

The service terminal communicates with the controller via the PPS2 interface. Addition-

ally, the bus is looped through the service terminal. RXC: this enables a PC for the

RXT10 service tool to be connected to the tool socket of the service terminal.

For correct operation of the service terminal, there must always be a room unit

connected to the controller. PPS2 communication is not possible without a room

unit.

80443 A

Auto

Options for connecting the RXT20.1 service terminal:

1 To QAX… room unit

2 To RXC… room controller

3 Not possible without QAX... !

All dimensions in mm

9,5

4,2

80088

100

Pin layout of RJ45

connector

Connection diagram

Caution:

Dimensions

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