
112
6 WIRING
6.5 Input Wiring
Precautions for connecting input devices
■
In the case of no-voltage contact
Use input devices appropriate for low electric current.
If no-voltage contacts for high current (switches) are used, contact failure may occur.
■
In the case of input device with built-in series diode
The voltage drop of the series diode should be the following value or less.
Also make sure that the input current is over the input-sensing level while the switches are on.
■
In the case of input device with built-in parallel resistance
Use a device having a parallel resistance Rp (k
Ω
) of the following value or more.
Item
Specifications
Voltage drop
FX5U-32M
X0 to X5
3.9 V
FX5U-64M
, FX5U-80M
X0 to X7
High-speed pulse input/output module
X0 to X5
FX5U-32M
X6 to X17
4.1 V
FX5U-64M
, FX5U-80M
X10 to X17
High-speed pulse input/output module
X6, X7
FX5U-64M
, FX5U-80M
X20 and
subsequent
2.4 V
Input module, Input/output modules, Powered input/
output module
Item
Specifications
Parallel resistance Rp (k
Ω
) FX5U-32M
X0 to X5
14
FX5U-64M
, FX5U-80M
X0 to X7
High-speed pulse input/output module
X0 to X5
FX5U-32M
X6 to X17
15
FX5U-64M
, FX5U-80M
X10 to X17
High-speed pulse input/output module
X6, X7
FX5U-64M
, FX5U-80M
X20 and
subsequent
13
Input module, Input/output modules, Powered input/
output module
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