Basic Connections - Bentel Security B-TEL2 Manual De Instalación Y Usuario

CAUTION - Before applying voltage to terminals [+12] and [M
positioned.
The basic connections are necessary for dialer function. They are illustrated, with the channels highlighted, in
Figure 3. In the connection example, alarm channel L1 is connected to the normally closed contact (NC) of the
burglary system and receives, under normal conditions, the positive input voltage.
) The dialer's default programming allows for activation by the absence of the positive signal ('Positive drop',
factory setting, see jumper [16]). Should this setting change (activation with a 'Negative command') the
alarm channel must be connected to a ground output in the event of an alarm (for example, Open-Collector).
The dialer does not require auxiliary connections in order to function. However, these connections provide
many useful options. All auxiliary connections are shown in Figure 3 and described in the following paragraphs.
Tamper - Connection to tamper line terminals allows detection of possible attempts to tamper with the dialer
box. In Figure 3, these terminals are connected in series to the security system tamper line.
Connection to other devices - The B-TEL2 is provided with 4 alarm channels. Channel 1 can, for example, be
used to connect the alarm relay of a fire-protection system (as shown in the example), or the anti-theft alarm
relay of a burglary system (connected to Channel 2 in the example) or a radio-receiver relay (telecare).
Interrupt alarm cycle - An alarm channel can be used for the Stop Alarm function. For example, a momentary
positive activation of the 14[L4] terminal can interrupt the alarm cycle already underway (see also "Stop Alarm"
in the PROGRAMMING chapters). In order for this feature to function, Channel L4 must be programmed (by
software or keypad) as "Positive command".
The dialer can be activated with positive or negative polarity signals (as specified in Table 2). To set activation
polarity, move the jumper [16] (see Figure 1). The dialer is factory-set to be activated with positive polarity
signals.
Activation mode can be programmed via software or keypad. Keep the following considerations in mind:
H H
H H H
With + polarity: dialer is activated by the application of a positive signal (positive command).
With - polarity: dialer is activated by the lack of a negative signal (negative drop).
L L L L L
With + polarity: dialer is activated by the lack of a positive signal (positive drop).
With - polarity: dialer is activated by the application of a negative signal (negative command).
CAUTION - When using positive command signals with a voltage higher than 20 V, it is necessary to
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BASIC CONNECTIONS

BASIC CONNECTIONS BASIC CONNECTIONS
BASIC CONNECTIONS BASIC CONNECTIONS
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connect to a 10Kohm resistor (not provided): see Fig. 4.
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