Mitsubishi MELESEC-ST User Manual page 39

3 SYSTEM CONFIGURATION
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(d) In a system configuration using multiple bus refreshing modules, supply
24VDC power from one external SYS. power supply to the multiple bus
refreshing modules (SYS. input).
24VDC
External SYS.
power supply
(e) When configuring a system that includes external AUX. power supplies and
power distribution modules, make sure to meet the conditions below.
1) When using an intelligent function module
When configuring a system that includes an intelligent function module,
use a power distribution module to separate the 24VDC power supply
(AUX. Input) for I/O module and that for intelligent function module.
For details, refer to Section (8) (a).
2) When performing online module change
When configuring a system, separate the power distribution module and
external AUX. power supply for each kind of modules, i.e., intelligent
function module, contact output module and I/O module (except contact
output module).
For details, refer to Section (7) (a).
(3) Restrictions on base modules
The screw clamp type and spring clamp type base modules cannot be used
together in the system. Use either one of them.
(4) Restrictions on DIN rail
The function ground (FG) is connected between the slice modules by a
conductive DIN rail.
Use a IEC-60715-compliant 35mm DIN rail, which is conductive (of which surface
is not insulated).
Recommended product: Weidmuller make DIN rail 35
(5) Installing end brackets and end plate
To prevent the base module connection from being loose due to vibration or
other be sure to install the end brackets and end plate.
MELSEC-ST
7.5mm (steel type)
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