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«

TRUBACH-RK

»

WIRELESS SOUND ALARM 

ANNUNCIATOR

5 Annunciator Design

The annunciator outside view is shown in Figure 1.
The annunciator consists of a base (1) and case (4). The base 

comprises the oval holes (2) for it’s fastening to the mounting surface. 

The case is fastened to the base with latches (3). 

There is a two-color LED indicator (5) on the front surface of the 

case. There are contacts (6), the main power-supply battery holder 
(7) and the backup power-supply battery holder (8).

1 Product Overview

1.1 Wireless sound alarm annunciator «Trubach-RK» (hereinafter, 

the annunciator) is intended for informing people about a fire or other 
emergencies by generating an audible alarm.

1.2 The annunciator is intended for operation as a component of a 

system that is operated by a control panel (hereinafter, CP), supporting 
«Rielta-Contact-R» wireless two-way data exchange protocol.

1.3 The annunciator is switched on and off by means of CP, and it’s 

operation modes are assigned by commands from the CP.

1.4 The annunciator monitors and transmits messages upon removal 

from it’s base or upon discharge of both main and backup batteries.

1.5 The following rates of control radio exchange may be assigned: 

10, 15, 30, 60 sec, 5 or 10 min.

1.6 The annunciator can operate in a continuous or pulsed  

audible-alarm modes.

1.7 Pulse-mode parameters can be set by the user in the process 

of the annunciator adjustment.

1.8 The annunciator operation mode is displayed by a two-color 

LED indicator.

1.9 Two frequencies in the 433.05 to 434.79 MHz frequency range 

are used for wireless signal exchange with the CP 

 the main frequency 

and the reserve one. The annunciator switсhes to the reserve operating 
frequency automatically in case of radio-frequency interference on the 
main one. Transmitter power does not exceed 10 mW. 

1.10 The annunciator is powered by two CR123A batteries, the main 

and the backup one.

1.11 The batteries’ respective service-time capacities in a standby 

mode (with a signal-monitoring interval of at least 30 sec) are as follows:

- main power-supply battery – at least 60 months or at least 2 months 

in continuous operation mode;

- backup power-supply battery – at least 2 months.
1.12 The annunciator is designed to operate continuously around 

the clock in closed premises of residential and industrial buildings 
and structures.

1.13 The annunciator is resistant to the impact of electromagnetic 

interference.

2 Principal Technical Characteristics 

Table 1 

Features

Value

Acoustic pressure level at 1 m distance from the 

annunciator, not less than

85 dB

Generated alarm signals frequency

2000 to 4000 Hz

Operating temperature

from minus 20 to +55 °С

Permissible humidity (at temperature 35 °C):

93 %

IP rating

IP40

Dimensions, max

⊘ 

121 x 54 mm

Weight (without power-supply batteries), max

0.2 kg

Battery life, not less than

10 years

3 Scope of Delivery

Each annunciator unit package contains the items listed in Table 2.
Table 2

Name

Qty

«Trubach-RK» wireless sound alarm annunciator 
Screw 3-3x30.016
Wall plug NAT 5x25 SORMAT
CR123A lithium power-supply battery
«Trubach-RK» wireless sound alarm annunciator. Installation Guide

1 pc.

2 pcs.
2 pcs.
2 pcs.

1 copy

4 Informativity

The annunciator generates and transmits the following messages 

to the CP via wireless communication:

- «Norm»;
- «Tampering»;
- «Main power-supply low-battery» 

 if power-supply voltage drops 

below (2.4 ± 0.2) V during a regular communication session;

-  «Backup power-supply low-battery» 

– 

if power-supply voltage 

drops below (2.4 ± 0.2) V during a regular communication session.

The annunciator displays one of it’s operation modes as specified 

in Table 3 (LED indication).

Installation Guide

Figure 1

6 LED Indication

Table 3

Annunciator Status

LED Indication

«Binding» mode

LED indicator blinking green

«Binding is completed»

Short-term (2 sec) LED indicator lighting red

«Identification» LED 

indication

Alternate LED indicator lighting green and red

«Communication

Quality Appraisal»

See Table 4

7 Switching On and Setting Up

7.1 Remove the annunciator from it’s base.

7.2 Install the main power-supply battery and the backup one.
7.3 Provide a tmporary connectionbetween the «-» contact of either 

power-supply battery holder and contact «4» on the annunciator base.

7.4 Make sure the LED indicator is blinking green (binding mode).
7.5 Perform the procedure of the annunciator binding to the CP in 

accordance with the CP operation manual.

7.6 Make sure that the LED indicator blinked red once for a 

moment.

Note

 

 

The binding mode is active for 100 sec. Sect. 7.3 should 

be repeated in order to resume the binding procedure.

8 Installation Recommendations

8.1 Appraise communication quality at the place where you intend 

to install the annunciator (see Sect. 9).

8.2 Install the annunciator at a place where communication quality 

is appraised as «excellent» or «good».

8.3 Install the base at the chosen location.
8.4 Make sure that the base contacts 2 and 3 are closed with a 

wire jumper.

8.5 Insert the annunciator into the base and lock it by turning 

clockwise to it’s fully latched position.

9 Communication Quality Appraising

9.1 Insert the annunciator into the base and lock it by turning 

clockwise to it’s fully latched position. Wait for 3 sec.

9.2 Remove the annunciator from the base and appraise 

communication quality by means of LED indication as shown in 

 

Table 4.

Note

 

 

The delay up to 4 sec between tampering and LED 

indication switching is possible.

5

7

8

9

1

2

3

4

6

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