PHP400 GSM Help Point.
11
5.4.
Internal power connections
The PHP400 Help Point is provided with a 12V power supply unit, required to power the
induction loop and telephone module itself.
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.
5.5.
Relay outputs
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
outputs as defined by EN 60950-1.
To comply, the installer must ensure that any connections are within SELV limits.
Relay ratings / SELV limits: 30Vdc, 42.4V peak (resistive load)
Max switching current:
3A
5.6.
Optional external inputs
The PHP400 can be equipped with 4 external inputs, which can be used to generate
call-in events or alarm reports (using TMA). Note – these optional connections are only
available if specifically ordered. Contact GAI-Tronics for details.
The inputs are provided on HD4 as shown, and are also labelled on the circuit board.
Control inputs are for connection to voltage free contacts only. Internal pull-up resistor
source current = 33µA. These inputs form part of a TNV3 circuit and precautions must
be taken to prevent hazardous voltages being applied to these circuits.
NB these inputs are not isolated from the telephone network.
A
B
A
B
- +
Relay 2
Relay 1
1 2 3 4
Common
N/C Com N/O
Содержание PHP400
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