Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


Connecting JSA7500 to a DC Power Source

Before connecting your Juniper Secure Analytics (JSA) appliance to a DC power source:

  • Ensure that you have taken the necessary precautions to prevent ESD damage.

  • Ensure that you have connected the JSA appliance chassis to earth ground.

Required tools and parts:

  • DC power source cables (12-14 AWG) with ends of the wire stripped ~12mm and twisted

  • Phillips (+) screwdriver, number 1


Before you connect power to the JSA appliance, attach ground wire in one of the below configurations to meet the safety requirements and to ensure proper operation:

  • Both power supply ground terminals

  • One or both of the chassis ground terminal(s) located to the left of the power supply modules

  • Both power supply ground terminals and one or both chassis ground terminals

You connect DC source power to the JSA appliance by attaching power cables from the external DC power sources to the terminal studs on the DC power feed faceplates.


DC-powered JSA appliances are intended for installation only in restricted access locations.


Before you perform the following procedure, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position.

To connect the DC source power to the JSA appliance:

  1. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable leads is 0 V, so that the cable leads will not become active while you are connecting DC power.
  2. Connect the stripped and twisted wires to wire clamps under DC terminal screws as shown in Figure 1.
    Figure 1: Connecting JSA to a DC Power SourceConnecting JSA to a DC Power Source
    DC ring lug
    Safety cover
  3. Use the terminal screws to secure the power source cables to the power feed on the JSA appliance by attaching the twisted wires that are attached to the cables to the appropriate terminals.

    The red cable should be connected to the V+ terminal, and the black cable should be connected to the V- terminal, respectively, as shown in Figure 1.

  4. Attach the plastic safety cover.