6 precautions for analog input modules – Toshiba SX 2000 User Manual
Page 139
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
Chapt.3 Precautions for I/O Modules
3.6 Precautions for Analog Input Modules
(1) Use a shielded twisted-pair cable for the analog input signal line, and wire
over the minimum distance. Wire the grounding of the cable shield on the
analog input side (the S2T side), (j) in the drawing below is the basic.
Sometimes, operation is more stable if the wiring is as in © or
(D.
©
£
£
£
)(X
)0L_
A
----- n
----- 5 r
)0(
)0£_
--------
----- n
----- V
X)C_
--------
Ana
Inpu
,N
F
og
ule
G
Analog
^ Input
i|,g module
FG
Ana
Inpu
,N
F
og
ule
G
(
2
)
(3)
Sometimes the conversion values are unstable, depending on the voltage
state of the external 24Vdc power supply.
If the conversion result is not stable, use a dedicated power supply for
analog.
All intrinsically shielded cables are fitted with ferrite choke adjacent to
analog inputs/outputs, and must have ground connections to grounded
metalwork within 5cm for applying to the EMC Directive.
1 2 2
Sequence Controller S2T