Appendix C Notes on Applying the I/O Modules
6F8C1645
120
C.1 DC Input Modules
(1) The condition for reading the input signal ON/OFF changes completely is
either of the following:
[Input ON time] = [OFF-to-ON response time] + [Input read cycle]
[Input OFF time] = [ON-to-OFF response time] + [Input read cycle]
The input read cycle is the scanning cycle for batch input/output.
Alternatively, it is the direct input instruction execution cycle if a direct input
instruction is used.
(2) For some external contacts, the reliability of contact may be unable to be
guaranteed with the input current of the module. In this case, install a
bleeder resistor between the input and common so that dummy current can
flow.
Figure.C.1-1
DC input connection
(Example of selecting bleeder resistor R)
Input voltage V = 24 VDC
Input module DI934 (5.2 mA / 24VDC)
When you want to set the contact currect to 50mA,
Resistance of bleeder resistor
Wattage of bleeder resistor
R =
24[V]
50[mA]
– 5.2[mA]
= 536[
Ω
]
P =
(24[V])
2
(536[
Ω
])
×
(2.5
~
3)
≒ 3
[W]
Contact
I
1
Input module
R= V
I-I
1
Wattage P > x (2.5~3)
V
I
I
2
V
2
R
Summary of Contents for typeS
Page 1: ...Unified Controller Vm Series Controller typeS Instruction Manual 6F8C1645 ...
Page 66: ...Chapter 3 Connecting Devices 6FC8C1645 48 ...
Page 80: ...Chapter 5 Program download 6F8C1645 62 ...
Page 84: ...Chapter 6 Operation 6F8C1645 66 ...
Page 87: ...Unified Controller Vm Series Controller typeS Instruction Manual 69 ...
Page 113: ...Chapter 8 Maintenance and Inspection 6F8C1645 94 ...
Page 127: ...Appendix A Specification 6F8C1645 108 ...
Page 155: ...Appendix C Notes on Applying the I O Modules 6F8C1645 136 ...
Page 157: ...1645 1 1912 ...