Installing an MX2000 Single-Phase AC Power Distribution Module
Before you install a single-phase AC power distribution module (PDM), be aware of the following:
Before performing AC power procedures, disconnect all power sources. To ensure that all power is off, locate the circuit breaker on the panel board that services the AC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.
To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each PDM slot must contain either a PDM or a blank panel. If you remove a PDM, you must install a replacement PDM or a blank panel shortly after the removal.
The single-phase AC PDM must be installed and secured in the chassis before connecting the input power cables. If the PDM must be removed, all input power cables must be removed from the PDM before the PDM can be removed from the chassis.
After powering off a PDM, wait at least 60 seconds before turning the circuit breaker back on.
The seven-feed single-phase AC PDM weighs approximately 8 lbs (3.6 kg). The nine-feed single-phase AC PDM weighs approximately 9 lbs (4.1 kg). To install a single-phase AC PDM:
- Make sure that the voltage across the AC power source cord is 0 V and that there is no chance that the cord might become active during the installation process.
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- (Optional) If you are switching from a DC PDM to an AC PDM, see Converting an MX2000 Router Between AC and DC Power for instructions on how to change the setting on the internal bar of the power distribution unit (PDU) cage to AC.
- Remove the faceplate covering the PDM slot.
- On the PDM, remove the two thumb screws holding the two ejector levers in the locked position. Put the screws aside for later use.
- Pull the two ejector levers away from the PDM until they stop.
- Using both hands, hold the PDM with the power plugs facing outward and slide it into the chassis until you feel resistance.
- Push in the two ejector levers on the PDM until they lock in place. Refer to Figure 1
- Gently push the ejector bar to be sure that the PDM is securely in place.
- Tighten the two thumbscrews on the ejectors to secure the PDM in the chassis. Apply between 7 lb-in (0.8 Nm) and 9 lb-in. (1.01 Nm) of torque to each screw. Do not overtighten the screws.
- Starting at one end of the PDM, plug the power cords into the power sockets on the PDM. Refer to Figure 2. Apply slight pressure so that the power cords are firmly seated in the power socket. As you plug in each power cord, the power LED for the socket lights up green.
- Attach the power cord retainer to the PDM to ensure that
the AC power cords do not touch or block access to router components,
and that they do not drape where people could trip on them. Figure 3 shows the seven-feed and nine-feed
power cord retainer.
Loosen the two screws at each end of the power cord retainer.
Position the power cord retainer over the PDM power cords with the power cord retainer prongs facing downward. Refer to Figure 4.
Secure the power cord retainer to the PDM by threading the two screws at each end of the power cord retainer into the screw holes on the PDM and turning them clockwise to tighten.
Verify that the PDM looks like the illustration shown in Figure 5
- Flip the power switch on all the PSMs to the on (
|) position to provide power to the router components.
- Verify that the LEDs on the PDM faceplate are lit steadily green, indicating that the AC terminal block is receiving power.
- Remove the ESD grounding strap from the ESD points on the chassis. Connect the strap to an approved site ESD grounding point. See the instructions for your site.