Trane Tracer Summit Hardware And Software Installation Manual page 239

Appendix B BCU (BMTS)
224
Figure 97. Tracer Summit BCU Component Layout
The BCU (BMTS) can also house an optional 24 Vdc power supply (Trane
part number 4020 0792), which is used for powering analog devices that
require 24 Vdc at 120 mA maximum power supply. These analog devices
include 4–20 mA or 0–10 Vdc humidity, pressure, and temperature sen-
sors. An optional 24 Vac 40 VA transformer (Trane part number
3580 6009) is required to provide ac power to the 24 Vdc power supply.
The locations of both the Trane 24 Vdc power supply and the Trane
24 Vac 40 VA transformer are shown in Figure 98 on page 225. The
transformer is mounted inside the power section of the BCU.
BMTW-SVN01F-EN