Allen-Bradley 1756-L6 Series, Reference Manual, Page: 58 / 134

58 Rockwell Automation Publication 1756-RM001I-EN-P - May 2012
Chapter 5 ControlLogix I/O Modules
Figure 29 - ControlLogix Analog Output Module Wiring in Current Mode
Using HART Analog Output
Modules The Highway Addressable Remote Transducer (HART) analog modules should
be used according to the same considerations as other analog output modules. For
an illustration of how to wire the HART analog output modules, see
Wiring the
HART Analog Output Modules on page 59 .
Actuator
43376
(+)
(–)
(+)
(–)
Analog Output Module Analog Input Module
This normally-open relay is controlled by
the status of the rest of the ControlLogix
system. If a short-circuit or fault occurs
on the module, the relay can disconnect
power to the module. The module used
to control this relay must follow SIL 2
output guidelines. This module also must
be considered during PFD analysis for
each safety function.
The relay used should be a signal-grade
relay using bifurcated or similar grade
contacts. The relay can be located in a
position to remove power to a single
actuator, or can remove power to
multiple actuators depending on the
granularity needed.
Secondary
Output
IMPORTANT HART protocol must not be used for safety-related data.