Installing the Wiring Base and Power Supply
3–6
All permanent Reader connections are made to the wiring base.
Wiring connections are made with conduit or cables. The conduit
openings in the wiring base are different for the U.S. and metric
versions. The U.S. version (Catalog No. 2755-NB40) has 1/2-14
NPSC threads, the metric version (Catalog No. 2755-NB41) has
PG13.5-18 threads. See the chart below for recommended wire and
cable types.
Connection
Recommended
Power
➀
Shielded Belden 9316
I/O
Depends upon module rating. Refer to Appendix A
RS-485
Use Belden 9842
RS-422
Use Belden 9830
RS-232
Use Belden 8303 or Alpha 45123
DeviceNet
Use Allen-Bradley Catalog No. 1485C-P1A50, -P1A150 or
-P1A300
(50, 150 or 300 meter cable)
Package Detect
#22 AWG minimum
➀
DeviceNet cable contains wiring for power connections
Cabling
Where the cable enters the wiring base, use the supplied cord grips
with rubber grommets. Each cord grip comes with 2 different size
grommets.
•
Cord grips with small diameter grommet accommodate wire
diameters 0.191 to 0.354 inches (4.9 to 9.0 mm).
•
Cord grips with large diameter grommet accommodates wire
diameters 0.236 to 0.472 inches (6.0 to 12.0 mm).
You can obtain additional cord grips from most electrical supply
outlets. Make sure you use Teflon tape or other type of thread
sealant to maintain a NEMA Type 4 rating.
Cable
Grommet
Nut
Threaded Bushing
Hole Plug
(U.S. )
Hole Plug
(Metric )
Cord Grip
Conduit and Cable
Connections
