Spectrum Controls 1769sc-HART Modules - Manual (Page 22)

Compact IO™ Isolated HART Analog Output Module
User’s Manual 0300217-03 Rev. A
3-4
If the OF4IH is to be installed adjacent to one of the modules listed in
the table above and the ambient temperature is in excess of 55°C, then
derating of the module is required to avoid thermal shutdown. Assume
the thermal dissipation of the OF4IH to be 2W fixed plus an additional
0.5W per channel. For example, if the OF4IH is to be installed
adjacent to the 1769-HSC, no more than 2 channels should be used on
the OF4IH.
Power Supply Distance
You can install as many modules as your power supply can support. However, all 1769
I/O modules have a power supply distance rating. The maximum I/O module rating is 8,
which means that a module may not be located more than 8 modules away from the
system power supply.
Figure 3-1
Section 3.4
System Assembly
The module can be attached to the controller or an adjacent I/O module before or after
mounting. For mounting instructions, see Panel Mounting Using the Dimensional
Template, or DIN Rail Mounting. To work with a system that is already mounted, see
Replacing a Single Module within a System.
The following procedure shows you how to assemble the Compact I/O system.
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Attention