Allen-Bradley 1756 Series, User Manual, Page: 23 / 136

Rockwell Automation Publication 1756-UM013B-EN-P - October 2019 23
Digital Safety I/O Module Operation in a Control System Chapter 1
Local I/O Modules or
Remote I/O Modules
You can use 1756 ControlLogix digital safety I/O modules as local or remote
I/O modules, with some restrictions that are based on the module and controller
type. Compatibility requirements apply and are described in Controller and
Software Compatibility on page 11 .
Local I/O Modules
When I/O modules reside in the same system as the controller, the modules are
local I/O modules.
Figure 4 - Local 1756 ControlLogix digital safety I/O modules
GuardLogix 5580 Controller
1756-L8SP Safety Partner
1756-IB16S Safety Input Module
1756-OBV8S Safety Output Module
OK
NET
LINK
RUN
REM
RUN PROG
FORCE SD OK
DC OUTPUT
SAFETY
FLT
ST 0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
O
K
SAFETY
FLT
ST 0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7 O
K
DC INPUT
FLT
ST 8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15