surface mount ability of the IS20, IS21 and the IS50, IS51 series cameras
Pelco Cameras, Pelco Video Management
Surface mounting of the
IS20, IS21 series
IS50, IS51 series
1. The IS50 and IS51 series cameras cannot be surface mounted, because they do not have a surface mount ring
2, The IS20 and IS21 series cameras can be surface mounted with no additional pieces
The work around for the IS50 and IS51 series is to either replace it with an IS20/21 series if you need to surface mount or surface mount a 4S box and mount the IS50, IS51 to it.