012-554-B2 Rev D
Page 1 of 16
1
Introduction
1.1
Scope of the Manual
This instruction manual explains the installation and interconnection of Alpha Technologies’ CSM46 converter
system. Both the converter modules and the shelves, which the modules are plugged into, are covered in this
manual.
NOTE:
To aid the user with installation, frequent reference is made to drawings located at the rear of this manual.
1.2
Product Overview
The CSM46 down converter modules employ a high frequency switched mode conversion technique to provide a
bulk regulated –50 to –55Vdc output from multiple isolated ±190Vdc inputs. This is directly compatible with
Alpha’s CSM36 48Vdc to ±190Vdc up converters (reference manual #012-552-B2) for use in network powering
applications.
Network (a.k.a. Express, Simplex, Remote, Centralized) powering is a method of distributing energy over an
existing copper network. Multiple twisted-pair copper is used to distribute 100VA limited power sources at
±190Vdc. The individual, isolated inputs are terminated at a remote end and converted back to a bulk 48Vdc
supply.
Each CSM46 module plugs into a common shelf. The shelf (Figure 1 shown below) provides external connections
for inputs, output, and alarm interfaces and can accommodate up to ten modules. Additional converter modules
can be added to the shelf, at time of ordering or at a later time, after the converter system has been installed.
See Features Section of this manual for more information. See also the Specifications Section of this manual,
which details the electrical ratings for each module.
Figure 1–Perspective view of CSM46 10-module shelf
