2.1.3 Description of options
The unit housing is divided into board slot positions. This means that the unit consists of a number of printed
circuit boards (PCBs) mounted in numbered slots - #1, 3, 4 and 5. Some of these board slots are standard
and some are intended for options. The board slot positions are arranged as illustrated below.
ML-2 application notes Converting PPU-2
to PPU-3 4189341126 UK
Application and installation
DEIF A/S Page 6 of 18