Installing A Terminal Block - Hitachi HSC-2100 Hardware Manual

I/o modules
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3.7 Installing a Terminal Block

Terminal blocks, either 20-point or 40-point, can be installed by performing the procedure
described below. Any terminal block, if installed improperly, may result in poor electrical
contact between the module and the terminal block. To avoid this, be sure to follow the
procedure properly.
Step 1:
Module
Terminal block
Step 2:
Insert the terminal block into the receptacle provided
in the module. When inserting it, hold the two ends
of the terminal block with your fingers and, if it is a
40-point terminal block, push it in (approximately 1
millimeter) until it clicks into place.
If it is a 20-point one, it is impossible to push it in
with your fingers until it clicks into place. So, push
it in slightly, hold it with your hand, and follow the
instructions given in Step 2.
Fixing-screw
Slightly tighten
the screws
alternately.
3 INSTALLATION AND MODULE MOUNTING
Tighten the upper fixing-screw of the terminal
block slightly and then the lower screw in the
same manner. Repeat this until the terminal
block is fixed securely onto the module. When
it is fixed securely, make sure that the terminal
block is attached completely on the module.
3-11

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