98
Safety Inputs
Section 5-2
5-2-2
Input Channel Mode Setting
The input channel mode of local safety inputs is set based on the type of
external device to be connected.
5-2-3
Test Source Setting
Select the test output terminal to use as the test source for the safety input
when the input channel mode is set to
Test pulse from test output.
If short cir-
cuit detection between input wiring lines is necessary, specify a different test
output terminal.
Examples:
Note
With the NE1A-SCPU02, terminals T0 to T3 can be selected as the test
sources for IN0 to IN19. Terminals T4 to T7 can be selected as the test
sources for IN20 to IN39.
5-2-4
Input ON/OFF Delays
For the NE1A-series Controller’s local safety inputs, input ON/OFF delays can
be set in increments of multiples of the Controller’s cycle time between 0 and
126 ms. Setting a larger value helps to reduce influence from external device
chattering.
Channel Mode
Description
Not used
Input not connected to an external device.
Test pulse from test output
Connects a contact output safety device with a test output. When this mode
is selected, select the test output terminal to use as the test source and set
the test output mode to
Pulse Test Output.
This enables detection of short
circuits with the power supply line (positive side), earth faults, and short cir-
cuits with other input signal lines.
Used as a safety input
Used when connecting to safety devices with a semiconductor output, such
as a Light Curtain.
Used as a standard input
Input connected to a standard (non-safety) device.
T0
T1
IN1
IN0
11
21
12
22
IN1
IN0
11
21
12
22
T0
Circuit in Which Short Circuit Detection
between Input Signals Is Required.
Circuit in Which Short Circuit Detection
between Input Signals Is Not Required.
T ON-delay
T OFF-delay
Safety input,
e.g. limit switch
I/O tag
Summary of Contents for NE1A-SCPU01 - 07-2009
Page 3: ...iv...
Page 9: ...x TABLE OF CONTENTS...
Page 11: ...xii...
Page 15: ...xvi...
Page 70: ...35 Installation Section 3 1 Top Top Bottom Bottom...
Page 72: ...37 Installation Section 3 1 3 1 3 Dimensions and Weight Dimensions NE1A SCPU01 V1...
Page 85: ...50 Wiring Section 3 2...
Page 123: ...88 Explicit Message Communications Section 4 7...
Page 141: ...106 Safety Outputs Section 5 4...
Page 257: ...222 Connection Status Tables Section 10 8...
Page 261: ...226 NE1A series Controller Replacement Section 11 2...
Page 264: ...229 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 266: ...231 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 267: ...232 Appendix A Local Output Setting Example...
Page 269: ...234 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 270: ...235 Appendix A Local Output Setting Example...
Page 273: ...238 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 275: ...240 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 276: ...241 Appendix A Local Output Setting Example...
Page 289: ...254...
Page 293: ...258 Index...