Western Telematic CAS-161A - Manual (Page 17)

C. Installing Add-On Modules
The CAS-161A is field expandable to 32, 48, or 64 ports by
attaching up to three additional Add-On Modules to the master
unit. Each Add-On Module Kit includes the following:
1 ea. Add-On Module w/ six-wire power cable
2 ea. Connecting Plates
1 ea. Left Rack-Mount Bracket (Style-2)
1 ea. Right Rack-Mount Bracket (Style-2)
18 ea. 6-32 x 3/8” Screws
To install Add-On Modules, refer to Figure C.1 below and
proceed as follows:
Note: If your unit has a stand-alone top cover, a
Style-1 Rack-Mount Kit is also required for the top
Module.
Apx-3
Appendices
Figure C.1: Add-On Module Installation