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Modular Chassis Considerations
Place your RTD module in any slot of an SLC 500 modular chassis (except slot
0) or a modular expansion chassis. Slot 0 is reserved for the modular processor or
adapter modules.
Fixed Expansion Chassis Considerations
Important:
The 2-slot, SLC 500 fixed I/O expansion chassis (1746-A2)
supports many combinations of modules. The combinations that
are not supported by the fixed expansion chassis are shown in the
table below. For a complete listing of valid combinations using the
RTD module in a 2-slot expansion chassis with another SLC I/O or
communication module, refer to the table in the SLC 500™ RTD/
Resistance Input Module User Manual, publication 1746-6.7.
Invalid Combinations Using the RTD
Module in a Fixed Expansion Chassis
OW16
OB32
OB32
General Considerations
Most applications require installation in an industrial enclosure to reduce the
effects of electrical interference. RTD inputs are susceptible to electrical noises
due to the small amplitudes of their signal.
Group your modules to minimize adverse effects from radiated electrical noise
and heat. Consider the following conditions when selecting a slot for the RTD
module. Position the module:
• in a slot away from power lines, load lines and other sources of electrical
noise such as hard-contact switches, relays, and AC motor drives
• away from modules which generate significant radiated heat, such as the
32-point I/O modules
SLC 500™ RTD/Resistance Input Module
5V dc (Amps)
0.170
0.452
0.452
24V dc (Amps)
0.180
-
-
Publication 1746-5.17
7
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