August 7, 2006
Chapter 2: Installation
AIWN-UM-7001-01
2-3
Power Connection
Following local practices, attach two pair of power supply wires from two separate power sources to the four pin
power plug (pair 1: -48 VDC-A, RETURN-A and pair 2: -48 VDC-B, RETURN-B) on the chassis backplane (see
Figure 2-3
for details).
Figure 2-3. Four-Pin Power Plug Wiring Diagram
Separately fuse each -48 VDC power source, but do not install fuses now. Recommended wire size is 20 AWG
(0.8 mm). This recommendation applies to wiring from the ENIU to a fuse panel using solid conductors. Fuse size
should not exceed recommendation (see
Appendix A: Specifications
for fuse size). Plug the power plug into the
power connector located on the back of the ENIU.
Step
Action
1
Using AWG 16 (1.25mm) solid copper wire, connect one end of the ground wire to the ground stud at the
back of the ENIU (shown in
Figure 2-2 on page 2-3
). Tighten the stud nut to 15 pound-force inches (1.7
Newton meters) of torque.
2
To assure proper operation, the ground stud must be connected to a good earth ground.
3
Connect the other end of the ground wire to the office ground conductor. Ensure this connection is made
using methods and hardware that meets all applicable local and national electrical codes.
Figure 2-2. ENIU Rear View with RJ-45 Connector
20382-A
RETURN-A
-48 VDC-A
RETURN-B
-48 VDC-B
RTN
RTN
-48 VDC
-48 VDC
20477-A
POWER SOURCE
A
POWER SOURCE
B
Summary of Contents for Network Unit
Page 4: ...Table of Contents August 7 2006 iv AIWN UM 7001 01...
Page 6: ...List of Figures August 7 2006 vi AIWN UM 7001 01...
Page 8: ...List of Tables August 7 2006 viii AIWN UM 7001 01...
Page 28: ...Chapter 3 Provisioning August 7 2006 3 10 AIWN UM 7001 01...
Page 30: ...Appendix A Specifications August 7 2006 A 2 AIWN UM 7001 01...
Page 32: ...Appendix B Product Support August 7 2006 B 2 AIWN UM 7001 01...
