Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 12 Page 31 of 265
Note 1. The power ratings in table 3 above allow for the additional losses in
the transformers required (described below). These power ratings are indicative for
the purpose of selection of the correct size of dimming transformer.
If using a 48V Transformer kit, the following are the maximum connections that may
be made:
48V AC 50VA Transformer
2 Red/Green Nearside if using audio/tactile equipment OR
3 Red/Green Nearside if audio/tactile equipment is not being used OR
6 Call Accept
48V AC 160VA Transformer
6 Red/Green Nearside if using audio/tactile equipment OR
10 Red/Green Nearside if audio/tactile equipment is not being used OR
20 Call Accept
2.11.1 Controller Power
Typical supply requirement for a controller including dimming transformer (excluding
lamp loads, detectors and OTU) is:
 Typically, 47W (Depends on cards fitted. A fully equipped 32-phase
controller requires a maximum of 97W.)
 Siemens ST4R/ST4S detectors require 2.4W per unit.
 Sarasota MTS36Z (2 channel) or MTS38Z (4 channel) detectors require 3W
per unit. (N.B. The power consumption is the same for both 2 and 4 channel
units.)
 Microsense detectors require 6W per unit.