MX2008 AC Power System

There are a total of nine AC power supply modules (PSMs) located at the rear of the chassis in slots PSM0 through PSM8 (left to right). The AC PSMs in slots PSM0 through PSM8 provide power to:

• Fan trays (0 and 1)

• MPCs in slot 0 through 9

• RCBs in slot 0 and 1

• SFBs in slot 0 through 7

The MX2008 routers supports a three-phase delta AC power system, three-phase wye AC power system, or a single-phase AC power system.

In a three-phase AC power system, the AC power going to the PSMs is split into a pair of phases. Each PSM works on a single phase. This means the power system works independent of the kind of AC feed connected. You can connect one or two feeds, depending on the power system configuration, number of PSMs, redundancy, and so on. Each phase from each of the two feeds is distributed among one or two PSMs. One feed has each phase going to two PSMs and the other feed has each phase going to a single PSM.

The single-phase AC power distribution module (PDM) provides an AC input power interface to the PSM through the system power midplane. Up to nine PSMs can be connected to a single-phase AC PDM. Each single-phase AC PDM accepts seven or nine AC power cords from a single-phase AC source. Each AC input is independent and feeds one PSM.

The AC PSMs are hot-removable and hot-insertable.

Up to nine PSMs may be connected in parallel per power subsystem to increase available power for MPCs, as needed and to provide redundancy. Figure 1 shows the AC PSM.

Figure 1: AC Power Supply Module

The AC power system provides dual redundant feeds (INP0 and INP1). Each PSM takes in two AC feeds and uses one of the two. One input feed is active during operation. Each feed is a single-phase AC system 200–240 VAC derived from a three-phase delta or wye AC input system. These feeds are set by the input mode DIP switch located on the AC PSM. Move the input mode DIP switch to the on or off position to determine the power supply feeds (see Table 1 and Figure 2).

Figure 2: Selecting the Input Feed on the AC Power Supply Module

A PSM failure triggers the alarm LED on the craft interface. For information about connecting to AC power sources, see MX2008 AC Power System Electrical Specifications.

Each AC PSM faceplate contains four LEDs. These LEDs are described in Table 2. There are a total of nine bicolor LEDs located in the craft interface, and are labeled 0 through 8 for the nine PSMs. Both feeds are alive during operation, but only one feed provides current. In addition, a PSM failure triggers the red alarm LED on the craft interface.

Each three-phase delta AC power distribution module (PDM) weighs approximately 12 lb (5.44 kg). A metal wiring compartment contains two AC terminal blocks and ground labeled GND. One AC terminal block consists of three input terminals that serves six power supply modules (PSMs) and the second terminal block serves three PSMs. The terminal block on the left is labeled A1, B1, and C1 (bottom to top). The second terminal block on the right is labeled A2, B2, and C2 (bottom to top). The PDMs are located at the rear of the chassis in slots PDM0/Input0 through PDM1/Input1, (bottom to top). LEDs provide the status of the PDM. Figure 3 shows the three-phase delta AC PDM.

Figure 3: Three-Phase Delta AC Power Distribution Module

Figure 4 shows the three-phase delta AC PDM connections.

Figure 4: Three-Phase Delta AC Power Distribution Module Connections

Figure 5 shows the three-phase delta AC power cord.

Figure 5: Three-Phase Delta AC Power Cord

Each three-phase wye AC PDM weighs approximately 12 lb (5.44 kg). A metal wiring compartment contains two AC terminal blocks and ground labeled GND. One AC terminal block consists of three input terminals that serve six PSMs and the second terminal block serves three PSMs. The terminal block on the far left is labeled A1, B1, C1, and N1 (bottom to top). The second terminal block is labeled A2, B2, C2, and N2 (bottom to top). The PDMs are located at the rear of the chassis in slots PDM0/Input0 through PDM1/Input1, (bottom to top). LEDs provide the status of the PDM. Figure 6 shows the three-phase wye AC PDM.

Figure 6: Three-Phase Wye AC Power Distribution Module

Figure 7 shows the three-phase wye AC PDM connections.

Figure 7: Three-Phase Wye AC Power Distribution Module Connections

Figure 8 shows the three-phase wye AC power cord.

Figure 8: Three-Phase Wye AC Power Cord

The MX2008 nine-feed single-phase AC power distribution module (PDM) provides AC input connection from a single-phase AC source, and also provides an input power interface to the power supply module (PSM) through a system power midplane. Up to nine PSMs can be connected to the single-phase AC PDM. Each AC input is independent and feeds one PSM.

The nine-feed single-phase AC PDM weighs approximately 9 lb (4.1 kg). The front of the PDM has nine type C21 power cord connections for connecting to single-phase AC power. Figure 9 shows the nine-feed single-phase AC PDM.

Figure 9: Nine-Feed Single-Phase AC Power Distribution Module

Each single-phase seven-feed AC PDM weighs approximately 12 lb (5.44 kg). The front of the PDM has seven type C21 power cord connections for connecting single-phase AC power. Figure 10 shows the single-phase seven-feed AC PDM.

Figure 10: Seven Feed Single Phase AC Power Distribution Module

Figure 11 shows the LEDs on the three-phase delta AC PDM faceplate. The three-phase wye AC PDM has the same LEDs. The LEDs in Table 3 indicate the status of the AC PDM. In addition, a PDM failure triggers the red alarm LED on the craft interface.

Figure 11: Three-Phase Delta AC PDM LEDs

To allow for future growth so that you can operate the router in any hardware configuration without upgrading the power infrastructure, we recommend that you provision 2800 W for each AC PDM (delta or wye).

If you do not plan to provision 2800 W for each AC PSM, you can use the information in Table 4 and Table 5 to calculate power consumption for various hardware configurations, input current from a different source voltage, and thermal output, as shown in the following examples for an AC-powered router.

Table 6 lists the power requirements for various hardware components when the router is operating under typical voltage conditions.

If you do not plan to provision as recommended above, you can use the information in Table 6 to calculate the power consumption for your hardware configuration.

Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located next to the rack that houses the router. An AC power cord connects each power distribution module (PDM) to the power distribution panel.

For more information about AC PDM input power mapping, see Mapping Input Power from AC Power Distribution Modules to AC Power Supply Modules on MX2008 Router.

Detachable AC power cords, each approximately 14.8 ft (4.5 m) long, are supplied with the router. The AC power cord wires are inserted into the AC input terminal with the help of a screwdriver. The plug end of the power cord fits into the power source receptacle for your geographical location.

Table 7 and Table 8 provide specifications for the AC power cords for each region supported. Figure 12, Figure 13, and Figure 14 illustrate the plug on the 3-phase and single-phase AC power cords.

Figure 12: Three-Phase Delta AC Power Cord

Figure 13: Three-Phase Wye AC Power Cord

Figure 14: Single-Phase AC Power Cord (C21 plug)

Table 9 lists the AC power system electrical specifications for the MX2000 line of routers.

The following electrical safety guidelines apply to AC-powered devices:

• Note the following warnings printed on the device:

  CAUTION: THIS UNIT HAS MORE THAN ONE POWER SUPPLY CORD. DISCONNECT ALL POWER SUPPLY CORDS BEFORE SERVICING TO AVOID ELECTRIC SHOCK.

  ATTENTION: CET APPAREIL COMPORTE PLUS D'UN CORDON D'ALIMENTATION. AFIN DE PRÉVENIR LES CHOCS ÉLECTRIQUES, DÉBRANCHER TOUT CORDON D'ALIMENTATION AVANT DE FAIRE LE DÉPANNAGE.

• AC-powered devices are shipped with a three-wire electrical cord with a grounding-type plug that fits only a grounding-type power outlet. Do not circumvent this safety feature. Equipment grounding must comply with local and national electrical codes.

• You must provide an external certified circuit breaker rated minimum 20 A in the building installation.

• The power cord serves as the main disconnecting device for the AC-powered device. The socket outlet must be near the AC-powered device and be easily accessible.

• For devices that have more than one power supply connection, you must ensure that all power connections are fully disconnected so that power to the device is completely removed to prevent electric shock. To disconnect power, unplug all power cords (one for each power supply).

Power Cable Warning (Japanese)
Warning: The attached power cable is only for this product. Do not use the cable for another product.

Table 11 lists the three-phase delta AC power distribution monitor (PDM) electrical specifications.

Table 12 lists the three-phase wye AC PDM electrical specifications.

Table 13 lists the single-phase AC power distribution module (PDM) electrical specifications for the MX2000 line of routers.