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Siemens RXT20.1 – Service terminal CA2N3851en_03

Building Technologies 2015-12-23

851

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

room controller 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”

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

The service pin of the connected Desigo RXB / RXC controller can be operated

remotely 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 (L

ONWORKS® 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

Use

Ordering

Summary of content (6 pages)

PAGE 1
3 851 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 • • • • • • Use The RXT20.
PAGE 2
Mechanical design 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. The housing accommodates a printed circuit board, the function keys, LCD and a socket for the commissioning and service tool.
PAGE 3
LCD display Response at start-up If the service terminal is connected to a Desigo RXB / RXC controller, the start-up routine is as follows: Step Display Description 1 All segments activated for approximately 5 s. 2 Cursor fields may be activated for max. 10 s.* (approx. 3 – 5 minutes * on controller power up, e.g.
PAGE 4
Temperature setpoint • Temperature setpoint in °C or °F (see "Function key 2") The displayed temperature setpoint comes from the room unit. Static error messages Display Description The address of the service terminal has not been set correctly (see “Hex switch”). Dynamic error messages 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.
PAGE 5
Technical data Power supply Operating voltage range DC 12...15 V (SELV) DC 12…15 V class 2 (US) The service terminal receives its supply from the connected controller via the PPS2 interface Power consumption (controller) Max. 0.
PAGE 6
Pin layout of RJ45 connector 3206Z01 12 3 45 67 8 1 2 3 4 5 6 7 8 LONW ORKS® -Bus (Desigo RXC): CLA; LONW ORKS® -Bus (Desigo RXC): CLB; Not used Not used Not used Not used CP+ PPS2 data CP– PPS2 data EIB-Bus (Desigo RCB): CE+ EIB-Bus (Desigo RCB): CE– The same pin layout applies to the tool socket. Connection diagram Caution: 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.