Detector Power Supplies; Audible And Tactile Supplies - Siemens ST750 General Handbook

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_Unmetered_Supplies/Charging_Code_Structure_for_UMS.pdf

2.4.6 Detector Power Supplies

The maximum current available for detectors on the ST750 is 0.6A at 24V DC. Refer
to Table 4 or the Detector Handbooks for power consumption of detectors.
If more current is required, then power all detectors from a 24V AC Detector PSU.
See Appendix A for part number. This PSU provides a maximum of 2A at 24V AC
and is in the form of a transformer that can be mounted in three different positions:
• On the side of the Detector chassis using the four appropriate fixing holes
• On the back of the metal outer case frame near the mount position of the
detector chassis, using the four appropriate fixing holes.
• On the left-hand side flange of the metal outer case frame just above the
Master Switch Panel, using the four appropriate fixing holes.

2.4.7 Audible and Tactile Supplies

The Audible and Tactile power supplies on the ST750 are designed to provide a DC
voltage between 10V and 24V, and typically provide a maximum of 100mA at 18V
DC.
The ST750 provides three audible outputs on each of the 2 pedestrian phases.
These are located on the CPU card PL2 (Phase D) and PL3 (Phase B).
Pin 11 is titled 'Tactile Phase n'
via
Pin 12 is titled 'Audible Phase n Loud' – This is the normal connections to audibles.
Pin 13 is titled 'Audible Phase n Quiet' - This output is for the secondary physically
Audible and Tactile units used must operate correctly over the voltage range 10 to
24V DC.
The units recommended and supplied by Siemens that meet this requirement are:
Audible:
667/HB/33750/000
– This is intended to interlock a tactile unit
the tactile PSU 'interlock' input to prevent
operation on a Pelican during the flashing
green man period where the 'Loud' output
is configured to be time-switched.
This output can be configured to be time-
switched. If the tactile is also required to
be switched then the tactile PSU 'interlock'
input signal can be taken from this output.
muted audible.
667/4/04785/000
Highland Electronics type SC628P
(previously Sonalert Mallory SC628P)
Roxborough type SPCI535A4
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ST750 G H
ENERAL ANDBOOK
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