Configuration of the NRT 1 XT

General

The NRT 1 XT can be configured in several ways:

1. Configuration via telephone

2. Configuration via PRG 100

3. Configuration via Smartphone / Service-mode

4. Configuration using the PRS programming software and PRK programming cable

5. Configuration via the NRZ 800 receiver

Functions

Alarm types

The NRT 1 XT supports call routing to control centres that use Telegärtner or P100 data protocol.

In addition, call routing to DTMF-capable telephones (e.g. porter or janitor phones) is possible.
For each of the four phone numbers that the NRT can dial in an emergency, the routing mode can be freely assigned.
The following call-routing identifiers can be assigned to the four possible phone numbers:

Visual alarm

If the VNS option has been activated on the NRT, visual alarms (two-sense lift alarm via smartphone) are supported.
Ger more detailed information: Visual Emergency Call for Smartphones (VNS)

Alarm filtering

Alarm filtering is used to suppress abusive alarms or to delay the alarm. With alarm filtering active and the INPUT terminal enabled, activation of the alrm button will not initiate an alarm.

Alarm filtering is not active while a stored alarm is present. See also “End of alarm / acknowledge alarm”. For testing purposes, the filter can be bypassed (filter bypass). To bypass the filter, the alarm button must be pressed for a configurable time. Factory default is 30 seconds.

Dialling

If the alarm is accepted as a “valid” alarm (see Alarm filtering), the pictogram indicator “Please wait” is activated at the PICTO output.
The NRT then dials the first programmed alarm number. The dial tone and DTMF dialling tones of the telephone line can be heard from the loudspeaker for monitoring.

If additional acoustic signalling is required when an alarm button is pressed, the “alarm buzzer” can be enabled.
If the alarm buzzer is active, a sound is played through the loudspeaker while the alarm button is pressed and dialling of the first alarm number begins.

If the alarm centre does not respond immediately (busy line, wrong number, etc.), NRT hangs up and dials the next programmed number after approx. 10 seconds.
The number of dial attempts is adjustable; the factory setting is 12 attempts.
During the entire call-establishment process, the yellow “Please wait” indicator remains active.

In-car voice message

To inform and reassure the trapped person, a user-recorded voice message can be played into the car after the alarm button has been pressed. This message is played before each call attempt.
Recording, reviewing, and activating voice messages is only possible via configuration using a DTMF-capable telephone (see Telephone commands).

Identification voice message

If the NRT is routed to a telephone (e.g. janitor’s phone, staffed reception, etc.), a voice message can be recorded on the NRT.
Before the actual two-way communication with the trapped person is established, this message is played to the call recipient to identify the lift location and other relevant information.
When the alarm is acknowledged from the telephone, the NRT automatically establishes voice communication with the car.
Recording, reviewing, and activating voice messages is only possible via configuration using a DTMF-capable telephone
(see Telephone commands ).

Voice communication

If the alarm has been successfully established, voice communication with the car is activated.
The intercom station that triggered the alarm is activated automatically.

To indicate that communication is ready, the “Please speak” pictogram indicator is activated at the PICTO output.
At the same time, a four-tone sequence is played through the loudspeaker for acoustic signalling.

Ending voice communication

The NRT automatically detects when voice communication with the called telephone / control centre has been terminated by monitoring the busy tone on the telephone line.
Otherwise, voice communication is automatically disconnected after the configured communication timeout.
Manual hang-up is also possible:
Before hanging up, the called party can terminate the connection by pressing key “9”.

End of alarm / acknowledge alarm

NRT offers two different operating modes for ending an alarm.

Automatic end of alarm:

An alarm is automatically cleared after voice communication.
This operating mode is the factory default.

Manual according to DIN EN 81-28:2022:

An alarm remains stored until the NRT is notified that the alarm has ended.
There are several ways to initiate the end of the alarm:

1. After successful rescue and functional check of the lift, the rescue personnel press the alarm button and inform the alarm centre about the completed rescue.
   The call is then terminated by the alarm centre by pressing key “0” on the telephone.

2. The rescue personnel press the end-of-alarm button connected to the NRT.
   The NRT then reports the end of the alarm to the alarm centre.

3. The alarm centre triggers the end of the alarm via its receiving software.

Calling the NRT

The alarm centre or rescue personnel can call the NRT to inform the trapped person about the status of the rescue.
Dial the NRT’s phone number; voice communication is automatically established with the intercom station from which the most recent alarm was triggered.
If call protection is active, a stored alarm must be present for the NRT to establish voice communication, or the corresponding voice-communication access code must be entered on the device.

Messages

If the NRT XT is routed to a control centre that supports the Telegärtner or P100 data protocol, it can transmit fault or status messages in the following cases:

Audio test failed:

The automatic audio test was not successful, i.e. the loudspeaker or microphone is defective.

Alarm button test failed:

Active test:

Via the OUTPUT terminal, a remotely triggered alarm button can be activated by the NRT.
A corresponding notification is transmitted if the button does not switch during remote activation.

Passive test:

During the passive test of the alarm button, the system continuously checks whether the button remains pressed, or, when using a normally closed (NC) contact, whether the wiring is interrupted.
A corresponding notification is transmitted if either condition occurs.

Battery:

If a battery fault occurs, a corresponding notification is sent to the alarm centre.

Power supply:

If the power supply of the NRT fails and the internal battery is supplying power to the device, a corresponding notification is sent to the alarm centre.

The audio test, as well as the active or passive test of the alarm button, are linked to the routine call interval; i.e. these tests are performed after the routine call, and the respective notifications are transmitted.
Activation of the Battery and Power supply notifications can only be configured via IP protocol or using PRG100 / PRS.

Timer

For function and line monitoring, the NRT XT provides a timer call feature, according to EN 81-28 (automatic test).
Timer calls can be programmed to occur daily, weekly, monthly, or for example at 3-day intervals, at a defined time. The destination number of the timer call can be either a control centre using the NRZ or P100 data protocol.
Routing the timer call to a telephone is also possible.
A transmitted Morse tone sequence “TEST (- . … -)” distinguishes the timer call from a regular alarm.