Hitachi HSC-2100 Hardware Manual page 89

3 INSTALLATION AND MODULE MOUNTING
When removing the cover from the terminal block, do it as shown below.
<In the case of 20-point terminal block>
Gently press on the terminal block
cover with the center of your palm,
hold the top sides of the cover with
your fingers, and pull the cover off
the terminal block.
<In the case of 40-point terminal block>
While pushing the tip of your thumb
on the top front of the terminal cover,
place the tip of your forefinger on the
top end portion of the cover and pull
the top end portion off the module
with your forefinger.
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