Installing MX2000 Router DC Power Supply Modules (-48 V)
To install an MX2000 DC PSM (-48 V):
- Verify that the power
switches on all PSMs are in the off (
- On the PSM, slide the plastic cover away from the input
mode switch to expose the dual DIP switches. Move the input mode DIP
0(left switch) to the
ONposition for the bottom feed
INP0(expected to be connected), and DIP switch
1(right switch) to the
ONposition for the top feed
INP1(expected to be connected). If both DIP switches
1are turned to the
ONposition, then both top and bottom feeds are expected to be connected, (see Figure 1).
In addition, a PSM failure triggers the alarm LED on the craft interface.
The DIP switches are only used to indicate presence of a feed. If both feeds are present, power is always drawn from feed
0. Power will be drawn from feed
1only if feed
- Using both hands, grasp the handle and slide the PSM straight into the chassis until the PSM is fully seated in the chassis slot. Tighten the two captive screws (see Figure 2 (MX2020) and Figure 3) (MX2010), or Figure 4 (MX2008). Apply between 10 lb-in. (1.13 Nm) to 12 lb-in. (1.35 Nm) of torque to each screw. Do not overtighten the screws.
- Verify that the
INP1LEDs on the PSM are lit green steadily (see Figure 5).
If you are connecting two feeds,
INP1, both LEDs on the PSM will be lit green steadily.
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Move the switch to the on (
- Verify that the
PWR OKLED is lit green steadily. See MX2020 DC Power Supply Module LEDs, MX2010 DC Power Supply Module LEDs, or MX2008 DC Power Supply Module LEDs for information on PSM LED behavior.
- Repeat Steps 1 through 7 for installing
PSMs in slots
2, where required.
Each PSM slot not occupied by a DC PSM must be covered by a PSM blank panel.