GAI-Tronics PHP400 Installatie- en gebruikershandleiding - Pagina 9
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Telephone Module Connections
6.4.
Connect the telephone line A and B to the main terminal block CON1 as shown.
The centre earth terminal is intended for connection to a local earth to provide common
mode protection from lightning transients. If this terminal is not earthed there is an
increased risk that the telephone could be damaged by line-born transients.
Note that user safety from the telephone network is provided by isolation and does not
rely on this earth connection.
Note: Conductor sizes to be 0.5mm-2.5mm
The terminal block can be disconnected from the circuit board for easier installation
Cabling must not infringe European Low Voltage Directive (LVD) 2014/35/EU.
Internal power connections
6.5.
The PHP400 Help Point is provided with a 12V power supply unit, required to power the
induction loop, external relays and generally to provide increased audio output level.
The telephone module itself does not require this supplementary supply for normal
operation, but note that ringing on exchanges with low ring voltages (<40Vac) may be
unreliable without it.
The power input is on CON1A as shown and is connected to the PSU in the rear section
via screw terminals in a 2 way push-in connector.
Relay outputs
6.6.
The PHP400 is equipped with 2 external relay outputs, controlled by the telephone
software. As standard only relay 1 is enabled (HD9), set to activate when the telephone
is off-hook and deactivate when back on-hook. Other options are available, but must be
specified at order time. Contact GAI-Tronics for details.
The additional outputs are provided on HD9 & HD10 as shown and are isolated SELV
Relay 2
Relay 1
outputs as defined by EN 60950-1.
To comply, the installer must ensure that any connections are within SELV limits.
A
2
(flexible cable); 0.5-4.0mm
- +
A
B
- +
A
B
PHP400 Analogue Help Point.
B
N/C Com N/O
2
(solid cable)
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