Cisco N540-FH-CSR-SYS Install Manual page 32

Install the DC Power Cables
Install the DC Power Cables
Note When installing DC power supply, use 12AWG, 90°C temperature rated cable. The recommanded cable length
is three meters maximum from source. For lengths up to five meters, use 10AWG, and for lengths up to three
meters, use 12AWG, 90°C temperature rated cable. For other lengths, contact Cisco.
Note
• Always ensure that the building's installation for short-circuit (overcurrent) protection does not exceed
• We recommend using a circuit breaker or a fast acting fuse with a maximum DC rating of 20A for over
Note The DC connector or terminal block has an in-built screw and cage nut to which a torque of 1.3 to 1.8 N-m
may be applied.
Figure 34: DC Connector with In built Screw
A 0.97 in. (2.4 cm)
B 0.31 in. (0.78
cm)
M 0.81 in. (2 cm)
To attach the DC power supplies:
1. Locate the terminal block plug.
2. Insert the DC-input power source wires into the terminal block plug.
3. Attach the DC supply wires using the designated screws.
4. Use a ratcheting torque screwdriver to torque the terminal block plug captive screw. (See the following
figure)
Install the Device
32
20A.
current protection.
C 0.27 in. (0.68 cm)
D 0.17 in. (0.43 cm)
Install the Device