Hitachi S10VE, User Manual

Page: 99 / 506

6. Installation
6-12
6.11 Restrictions on mounting PI/O modules to the CPU unit
Observe the following restrictions when mounting PI/O modules to the CPU unit:
(1) Restrictions when mounting PI/O modules to the CPU unit
- If option modules and PI/O modules are mounted to the CPU unit, arrange the modules in such a way that
each is grouped with its own kind.
- Mount the PI/O modules in such a way that analog and low-voltage PI/O modules (modules with an output of
24 V DC or less) are separate from high-voltage PI/O modules (modules with an output of at least 100 V AC
or 48 V DC).
- Leave at least one empty slot between a high-voltage PI/O module (module with an output of at least 100 V
AC or 48 V DC) and a CPU module, option module, or analog module. You do not need to leave an empty
slot between high and low-voltage modules.
- When mounting a PI/O module to the CPU unit, take precautions to prevent noise from affecting the PI/O
module. For example, you might insert a buffer relay equipped with a surge absorber into each signal line.
- When mounting a PI/O module to the CPU unit, use a supply voltage of 100 V AC even if the specification
of the PI/O module permits both 100 V and 200 V AC. You cannot use a 200 V AC power supply.
The following ((a) to (e)) are examples of mounting modules to the CPU unit:
(a) When mounting a 100 V AC/48 V DC or higher PI/O module to the CPU unit, leave at least one empty slot
between the CPU module and the PI/O module.
(b) When mounting PI/O modules with a voltage of 24 V DC or lower to the same CPU unit as PI/O modules
with a voltage of 100 V AC/48 V DC or higher, mount each in a group with its own kind.
PS RI/O-IF CPU
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m
pt
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s
lot
PI/O modules with
voltage of 100 V AC,
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PS
RI/O-IF
CPU
PI/O modules
with voltage of
100 V AC, 48 V
DC, or higher
PI/O modules with
voltage of 24 V DC
or lower