ALLEN BRADLEY 1747-L551 PLC Processor

3–2
System Installation Recommendations
Spacing Your Controllers
The figure below depicts acceptable layouts. Follow the
recommended minimum spacing to allow for convection cooling
within the enclosure. Cooling air in the enclosure must be kept
within a range of 0° C to +60° C (32° F to +140° F).
Important:
Be careful of metal chips when drilling mounting holes
for the controllers. Do not drill holes above a mounted
SLC 500 controller.
C
C
1746-C9 Cable
A
SLC 500
1746-C7 Cable
A
SLC 500
1746-C9
Cable
B
B
B
B
C
SLC 500 SLC 500
D
A
SLC 500
1746-C9
Cable
A.
Recommended Spacing
15.3 to 20.0 cm (6 to 8 in.) when using the 1746-C9 cable. If
you mount two 13-slot chassis above each other, the distance
cannot exceed 10.2 to 12.7 cm (4 to 5 in.).
B. Greater than 10.2 cm (4 in.)
C. Greater than 15.3 cm (6 in.)
D. 7.7 to 10.2 cm (3 to 4 in.) when using the 1746-C7 cable.
C
SLC 500
Publication 1747-6.2