Rockwell Automation 1753-IB8XOB8 GuardPLC 8-Digital Inputs and 8-Digital Outputs Module Installation Instructions - Manual (Page 11)

GuardPLC 8-Digital Inputs and 8-Digital Outputs Module 11
Publication 1753-IN010A-EN-P - October 2005
Digital Input Terminals
See page 18 for the appropriate wire size. Digital inputs are connected to the
following terminals:
LS+, not L+, should be used for short-circuit protection. Each LS+ features individual
short-circuit and EMC protection that make it important to use LS+ for only it’s four
related inputs.
Surge on Digital Inputs
An EN 61000-4.5 surge impulse can be read as a short-time HI signal. To avoid an
error:
• install shielded input lines to prevent effects of surges in the system, or
• implement software filtering in the user program. A signal must be present
for at least two cycles before it is used by the rest of the logic in the user
program.
Terminal Number Designation Function
19 LS+ Sensor supply for inputs 1 to 4
20 1 Digital input 1
21 2 Digital input 2
22 3 Digital input 3
23 4 Digital input 4
24 L- Reference pole
25 LS+ Sensor supply for inputs 5 to 8
26 5 Digital input 5
27 6 Digital input 6
28 7 Digital input 7
29 8 Digital input 8
30 L- Reference pole
1 LS+ L-
DI
2 3 4
19 20 21 22 23 24
19 20 21 22 23 24
LS+ 5 L-
DI
6 7 8
25 26 27 28 29 30
25 26 27 28 29 30