GAI-Tronics PHP400 Руководство по установке и эксплуатации - Страница 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.

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.

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.

(flexible cable); 0.5-4.0mm

- +

PHP400 Analogue Help Point.

N/C Com N/O

(solid cable)