Chapter 2 Hardware Setup a a 2. Tighten the two screws in the holes indicated by b . 2_ ｂ ｂ Installing a DIN rail 1. The installation is applicable to a 35 millimeter DIN rail. 2. Install the mounting clips on a backplane. 3. Install the backplane on a DIN rail. Step 1: Press the hook in the direction indicated by the arrow. Step 2: Mount the DIN rail clips onto a DIN rail. Step 3: Pull the hook to fix the clips and the DIN rail. 2-3