Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 12 Page 39 of 265
2.11.5 Audible Supplies
The Audible power supplies on the ST900 are designed to provide a DC voltage
between 10V and 24V, and typically provide 50mA at 18V DC. This is provided
using the Audible Supply Kit. See the ST900 Installation, Commissioning and
Maintenance Handbook for more details.
This kit also provides the controlling signal for ‘Tactile Power Supplies’. The tactile
power supply obtains its power directly from the pedestrian green drive. The
controlling signal allows the controller to switch off the tactile while the green is
flashing for example.
Audible and tactile units used must operate correctly over the voltage range 10 to
24V DC. The audible units recommended and supplied by STC, which meet this
requirement, are: Sonalert Mallory SC628P, Highland Electronics type SC628P and
Roxborough type SPCI535A4 and Askari (Tone 22 – variable volume)
Audible: 667/4/04785/000
Highland Electronics type SC628P*
Roxborough type SPCI535A4
Askari (Tone 22 – variable volume)
(* was Sonalert Mallory SC628P)
Tactile: 667/7/17390/000 (Separate motor and drive module for mains driven
pedestrian green signal)
667/7/17390/048 (combined motor and drive module for 48v nearside
pedestrian green signal)
667/1/17390/248 (combined motor and drive module, with enable input
and fault output for 48V nearside pedestrian green signal)
For more information regarding the 48V tactiles, refer to section 3.14.9 on page 63