Brocade Communications Systems VDX 6940 Series Hardware Installation Manual page 61

1. Remove the DC wiring assembly from the front of each DC power supply by loosening the two assembly screws.
FIGURE 32 DC wiring assembly and power source wires
1. Wire tightening screws
2. Assembly screws
2. Loosen the wire tightening screws and insert wires from the DC power source into the wiring assembly. Connect the -48V
source cable to the negative terminal and the 0V cable to the positive terminal as marked on the harness assembly.
3. Tighten the wire tightening screws and reinstall the wiring assembly onto the power supply.
4. Tighten the assembly screws on the wiring assembly to secure it to the power supply.
5. Connect the wires from the power supply wiring assembly to your DC power source.
NOTE
The equipment installation must meet NEC/CEC code requirements. Consult local authorities for regulations.
6. Ground the chassis by attaching the ground wire from building ground to an appropriate crimp connector and attaching the
connector to a ground lug attaching screw located on the leftmost side of the nonport side of the device.
CAUTION
For a DC system, use a grounding wire of at least 12 American Wire Gauge (AWG). The 12 AWG wire should be
attached to an agency-approved crimp connector crimped with the proper tool.
NOTE
To ensure adequate bonding when attaching the ground lug, a minimum of 20 in-lb (2.76 Nm) of torque is required to
be applied to the mounting hardware used to attach the ground lug.
7. Refer to "Power Precautions."
8. Follow these additional precautions when making connections to DC power supplies:
NOTE
The equipment installation must meet NEC/CEC code requirements. Consult local authorities for regulations.
CAUTION
For the DC input circuit to the system, make sure there is a 20 Amp circuit breaker, minimum -48 VDC, double pole,
on the input terminal block to the power supply. The input wiring for connection to the product should be copper wire,
12 AWG, marked VW-1, and rated minimum 90°C.
Brocade VDX 6940 Hardware Installation Guide
53-1003495-06
Initial Configuration
61