Mitsubishi Electric FX5UC-96MT/D User Manual page 104

■ In the case of 2-wire proximity switch
Use a two-wire proximity switch whose leakage current, I is 1.5 mA or less when the switch is off.
If the resistance is larger than leakage current, I of 1.5 mA, connect a bleeder resistance Rb (k), obtained by the following
formula as shown in the following figure.
Item
Bleeder resistance Rb (k)
• Wiring example of sink-input-dedicated type (FX5UC-32MT/D)
Bleeder
resistance
FX5UC-32MT/D
X
COM
• Wiring example of sink/source-input-common type (FX5UC-32MT/DSS)
• Sink input wiring
FX5UC-32MT/DSS
X
Rb
COM
When a high-speed pulse is captured
When capturing pulses of a response frequency of 50 to 200 kHz on input X0 to X7 (FX5UC-32M and High-speed pulse
input/output module is X0 to X5) wire the terminals as stated below.
• The wire length should be 5 m or less.
• Use shielded twisted-pair cables for connecting cables. Ground the shield of each shielded cable only on the CPU module
side.
• Connect a 1.5 k (1 W or more) bleeder resistance to the input terminal, so that the sum of the load current of the open
collector transistor output on the mating device and the input current of the CPU module is 20 mA or more.
The above-mentioned restrictions are due to specifications of connecting device (encoder etc.). Please adjust the cable length
and load, for connecting device.
6 WIRING
102
6.5 Input Wiring
FX5UC-32MT/
FX5UC-64MT/,
FX5UC-96MT/
High-speed pulse input/output module
FX5UC-32MT/
FX5UC-64MT/,
FX5UC-96MT/
High-speed pulse input/output module
FX5UC-64MT/,
FX5UC-96MT/
Input module, Input/output module, Powered input/output module
+24 V
Rb
2-wire
sensor

2-wire

sensor
Bleeder
resistance
24 V DC
Fuse
X0 to X5
X0 to X7
X0 to X5
X6 to X17
X10 to X17
X6, X7
X20 and
subsequent
• Source input wiring
FX5UC-32MT/DSS

X
Bleeder
Rb
resistance
COM
24 V DC
Specifications
7 / (I-1.5) or less
7 / (I-1.5) or less
9 / (I-1.5) or less
2-wire
sensor
Fuse