Spectrum Controls 1746sc-NI8u - Manual (Page 25)

Chapter 2: Installing And Wiring Your Module 13
Selecting A Rack
Slot
Two factors determine where you should install your module in the
rack: ambient temperature and electrical noise. When selecting a slot
for your module, try to position your module:
• in a rack close to the bottom of the enclosure (where the air is
cooler)
• away from modules that generate significant heat, such as 32-point
input/output modules
• in a slot away from ac or high-voltage dc modules, hard contact
switches, relays, and ac motor drives
• away from the rack power supply (if using a modular system)
Remember that in a modular system, the processor always occupies
the first slot of the rack.
Module Installation
and Removal When installing the module in a chassis, it is not necessary to remove
the terminal blocks from the module. However, if the terminal blocks
are removed, use the write-on label located on the side of the terminal
blocks to identify the module location and type.
1746sc-
NI8u
RACK_______SLOT_______
TB1
1746sc-
NI8u
RACK_______SLOT_______
TB2
CAUTION
POSSIBLE EQUIPMENT OPERATION
Before installing or removing your module, always
disconnect power from the SLC 500 system and from
any other source to the module (in other words, don’t
“hot swap” your module), and disconnect any devices
wired to the module.
Failure to observe this precaution can cause unintended
equipment operation and damage.
!