Table Of Contents
System Installation
2.1 Pre-Installation
2.1.1 Ground Symbol
2.1.2 Tools Required
2.1.3 Installation and Commissioning Checklist
2.1.4 Installation Materials
2.2 Install AC/DC Power System Components
2.2.1 Install the System Shelf
2.2.2 Install the 1 RU Distribution Shelf
2.2.3 Install the Ground Cable
2.3 Install AC Power Cables
2.3.1 Install the Rectifiers
2.4 Install Circuit Breakers
2.4.1 Install the Alarm Cable
2.5 Install Load-and-Return Connections
2.5.1 Install GMT Fuse Connections
2.5.2 Install 1 RU Distribution Shelf Load Connections
2.6 System Upgrades
2.6.1 GMT Fuses
2.6.2 Small to Medium System Upgrade
2.6.3 Medium to Large System Upgrade
2.6.4 Small to Large System Upgrade
System Installation
This provides step-by-step instructions for installing a Cisco AC/DC Power System. If you are installing a new system, begin with the "Pre-Installation" section. If you are upgrading an existing system, go to the "System Upgrades" section for instructions.
2.1 Pre-Installation
The following information should be reviewed before attempting to install the Cisco AC/DC Power System.This section includes shelf markings, tools, equipment, and an installation checklist. Refer to the "1.2 Safety Recommendations" section on page 1-8 before beginning installation.
Note 
Each system installation is unique, so please review specific site requirements and system configurations before installing the system.
2.1.1 Ground Symbol
Figure 2-1 shows the ground symbol located on the Cisco AC/DC Power System.
Figure 2-1 Ground Symbol
2.1.2 Tools Required
The following tools and parts are required for safe installation of the Cisco AC/DC Power System:
•Digital multimeter
•Insulated Phillips and flathead screwdriver sets
•Insulated wire & cable strippers/crimpers (for ground lug, DC cable, alarm, and GMT cable installations)
•8mm socket or wrench for ground cable installation
1
2.1.3 Installation and Commissioning Checklist
•AC/DC system shelf mounted securely in rack
•1 RU Distribution Shelf mounted securely in rack directly above the system shelf (if applicable)
•AC and DC cabling meets local and national electrical code specifications
•Installation in ETSI racks allows for front-to-back ventilation and the use of a ventilated door and cabinet top
•System alarm cabling is installed and secure
•Power cables are secure and installed correctly
•Rectifiers are installed and seated correctly in the system shelf
•The controller and 1 RU Distribution faceplates are installed and secure (if applicable)
•System shelf rear cover is installed and secured
•System powers up and all red LEDs are extinguished after a few minutes
2.1.4 Installation Materials
Table 2-1 and Table 2-2 list the Cisco supplied installation materials that ship with the Cisco AC/DC Power System. Table 2-3 lists materials that will need to be furnished at the install location.
Table 2-1 Supplied Materials for the System Shelf
Description
|
Qty
|
Use
|
M6 0x20mm screw (thread forming)
|
6
|
Shelf mounting screws (ETSI racks/cabinets)
|
12-24 x1/2" screw (thread forming)
|
6
|
Shelf mounting screws (ANSI, IEC racks/ cabinets)
|
M6 cage nut
|
6
|
Shelf mounting nut (ETSI racks/cabinets)
|
Mounting bracket 600mm ETSI rack
|
2
|
Ear mounts (ETSI racks/cabinets)
|
2A GMT fuse
|
2
|
GMT fuse panel
|
5A GMT fuse
|
2
|
GMT fuse panel
|
10A GMT fuse
|
2
|
GMT fuse panel
|
15A GMT fuse
|
2
|
GMT fuse panel
|
Standard AC plug
|
4
|
AC plugs that meet local requirements
|
Cable ties
|
12
|
Securing cables
|
ESD wrist strap
|
1
|
ESD protection
|
Quick Installation Guide
|
1
|
Installation instructions
|
System documentation
|
1
|
Installation, provisioning, and troubleshooting
|
Table 2-2 Supplied Materials for the 1 RU Distribution Shelf
Description
|
Qty
|
Use
|
M6 0x20mm screw (thread forming)
|
4
|
Shelf mounting screws (ETSI racks/cabinets)
|
12-24 x 1/2" screw (thread forming)
|
4
|
Shelf mounting screws (ANSI, IEC racks/ cabinets)
|
M6 cage nut
|
4
|
Shelf mounting nut (ETSI racks/cabinets)
|
Mounting bracket 600mm ETSI rack
|
2
|
Ear mounts (ETSI racks/cabinets)
|
Quick disconnect circuit breakers
|
2
|
1RU Distribution Shelf
|
Cable ties
|
4
|
Securing cables
|
ESD wrist strap
|
1
|
ESD protection
|
Quick Installation Guide
|
1
|
Installation instructions
|
Table 2-3 Non-Supplied Materials
Description
|
Qty
|
Use
|
6AWG (16mm²) grounding cable
|
1
|
system shelf grounding
|
6AWG (16mm²) grounding cable
|
1
|
1RU Distribution grounding (if applicable)
|
10 to 8 AWG (6 to 10mm²) cables
|
<8
|
DC load breaker connections (-48V and return)
|
22 AWG (0.34mm²) cables
|
n/a
|
2A GMT fuse cabling
|
18 AWG (0.75mm²) cables
|
n/a
|
5A GMT fuse cabling
|
14 AWG (2.5mm²) cables
|
n/a
|
10/15A GMT fuse cabling
|
26 to 22AWG (0.14mm²- 0.34mm²) cables
|
4
|
Alarm cabling
|
UL Listed double-hole lug 1/4in and 5/8in. center-to-center (lug part # Panduit LCD6 -14A-L or equivalent)
|
2
|
Ground cable installation
|
2.2 Install AC/DC Power System Components
The following sections contain instructions for installing components. Figure 2-2 shows a drawing of the Cisco AC/DC Power System without rectifiers.
Figure 2-2 Cisco AC/DC Power System Front View
2.2.1 Install the System Shelf
|
Warning
|
To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:
•This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
•When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.
•If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack. Statement 1006
|
The system shelf should be installed first, followed by the 1 RU Distribution Shelf (if this option is included as part of the installation).
Step 1 Determine if the correct ear mounts are installed on the system shelf. Ear mounts are shipped mounted on the shelf and support 19in. and 23in. IEC and ANSI standards (for 23in. shelves, ears should be removed, reversed and reinstalled). Two additional plates are also included to accommodate ETSI racks ( Figure 2-3). To install ETSI mounting ears, remove existing ears and attach ETSI mounting ears using included hardware.
Figure 2-3 ETSI Shelf Ear Mounts (system shelf and 1RU Distribution Shelf)
Step 2 Move the system shelf to the desired rack/cabinet slot (allowing 1RU above the shelf if a 1 RU Distribution shelf will be installed).
Step 3 Secure the system shelf to the rack using the six included mounting screws ( Figure 2-4).
Figure 2-4 Installing the System Shelf
Step 4 Continue with the "Install the 1 RU Distribution Shelf" procedure if applicable. If this system has no external distribution, place the 4 power connectors and alarm cables on the top of the system shelf to aid in future 1 RU Distribution Shelf installation ( Figure 2-5) and continue with the "Install the Ground Cable" section.
Figure 2-5 1 RU Distribution Cable Dressing
2.2.2 Install the 1 RU Distribution Shelf
Systems equipped with an optional 1 RU Distribution Shelf require power connections from the system shelf to the 1 RU Distribution Shelf using four cables terminated with Anderson power pole connectors. These cable connectors are pre-wired to the system shelf and should be connected to the 1 RU Distribution Shelf during installation.
Note In pre-installed system shelves, the DC cabling should be located at the top of the system shelf. Cable labels are provided (-48V and Return) for ease of installation.
In addition, the distribution alarm connection is made via a pre-wired 10 pin Molex™ connector from the system shelf and should be connected to the 1 RU Distribution Shelf at the indicated connection point.
Step 1 Determine if the correct ear mounts are installed on the system shelf. Ear mounts are shipped mounted on the shelf and support 19in. and 23in. IEC and ANSI standards (for 23in. shelves, ears should be removed, reversed, and reinstalled). Two additional plates are also included to accommodate ETSI racks ( Figure 2-3). To install ETSI mounting ears, remove existing ears and attach ETSI mounting ears using included hardware.
Step 2 Make sure that all circuit breakers are in the OFF position (see Figure 2-16).
Step 3 Move the 1 RU Distribution Shelf to the desired rack slot (directly above the system shelf).
Step 4 Secure the 1 RU Distribution Shelf to the rack using the four included mounting screws ( Figure 2-6). See for more information.
Figure 2-6 1 RU Distribution Shelf Installation
2.2.2.1 Install the Communications Cabling (Optional)
If the power system is equipped with the 1 RU Distribution Shelf, follow the instructions below. For power systems without the 1 RU Distribution Shelf, skip this procedure and go to the "Install the Ground Cable" procedure.
Intra-system shelf communication is accomplished using a 10 pin Molex™ connector originating from the system shelf and connecting to the 1 RU Distribution Shelf. Use the following instructions to install the communications cabling:
Step 1 Locate the distribution alarm cable at the rear of the system shelf.
Step 2 This cable is a prewired 10 pin Molex™ connector and is installed into the 1RU at the indicated location ( Figure 2-7).
Note The Molex™ alarm connector is keyed and can only be inserted one way. If the connector does not insert easily into the mount, make certain that the connector is being inserted with the key side up.
Figure 2-7 1 RU Distribution Shelf Alarm Cabling
2.2.2.2 Install the DC Power Cabling (Optional)
If the system is equipped with the 1 RU Distribution Shelf, follow the instructions below. For systems without the 1 RU Distribution Shelf, skip this procedure and go to the "Install the Ground Cable" procedure.
Step 1 Locate the four 6AWG (16mm²) power cables provided at the rear of the system shelf (on top of the system shelf in preinstalled systems). These are terminated with Anderson Powerpole™ Connectors (to install these connectors, remove the heat shrink from the ends of the connector).
Step 2 Connect to the appropriate connection points on the 1RU Distribution Shelf labeled load (-48V) and return (RETURN) ( Figure 2-8).
Note Anderson Powerpole™ Connectors are keyed and can only be inserted one way. If the connector does not insert easily into the mount, make certain that the connector is being inserted with the key side up.
Figure 2-8 Installing 1 RU DC Cabling
2.2.3 Install the Ground Cable
Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024
The equipment rack/cabinet, system, and optional distribution shelf need to be properly grounded to ensure the safe and efficient operation of the Cisco AC/DC Power System. Refer to NEC, CEC, ANSI T1-333, ETSI 300-386-TC, and local codes for guidelines on bonding telecom DC power equipment to building ground.
The system shelf should be connected to the rack/cabinet frame by a UL-listed 6 AWG (16mm²) wire with an insulation rating of at least 75° Celsius. Two #10 studs are provided at the rear of the shelf. The connection at the shelf end is made using a UL-listed double-hole lug 1/4in and 5/8in. center-to-center (lug part # Panduit LCD6-14A-L or equivalent).
The optional 1 RU Distribution Shelf should be bonded to the frame by a UL-listed 6 AWG (16mm²) wire with an insulation rating of at least 75° Celsius. Two #10 studs are provided at the rear of the shelf for this purpose. The connection at the shelf end is made using a UL-listed double-hole lug 1/4in. and 5/8in. center-to-center (lug part # Panduit LCD6-14A-L or equivalent).
2.2.3.1 Install the Cabinet/Rack Ground
The equipment rack should be bonded to the building principal ground busbar. Refer to the NEC, CEC, ANSI T1-333, ETSI 300-386-TC, and local codes for guidelines on bonding telecom DC power equipment to the building ground.
2.2.3.2 Install the System Shelf Ground
Step 1 Loosen the cover from the rear of the system shelf by loosening the four screws ( Figure 2-9).
Figure 2-9 Removing the System Shelf Rear Cover
Step 2 Pull out from the bottom and lift up to remove.
Step 3 Locate the #10 studs at the rear of the system shelf ( Figure 2-10).
Step 4 Using a UL-listed 6 AWG (16mm²) wire with an insulation rated to at least 75°C, connect the shelf to the appropriate cabinet connection point. The connection at the shelf end is made using a UL-listed double-hole lug 1/4in and 5/8in. center-to-center (lug part # Panduit LCD6-14A-L or equivalent) ( Figure 2-10).
Figure 2-10 Installing the System Shelf Ground
Step 5 Determine if the system is equipped with the optional 1 RU Distribution Shelf; if so, continue with the "Install the 1 RU Distribution Shelf Ground" section. If not continue with the "Install AC Power Cables" section.
2.2.3.3 Install the 1 RU Distribution Shelf Ground
Step 1 Locate the #10 studs at the rear of the 1 RU Distribution Shelf.
Step 2 Using a UL-listed 6 AWG (16mm²) wire with an insulation rating of at least 75° C, connect the 1 RU Distribution Shelf to the appropriate cabinet connection point.
Step 3 The connection at the shelf end is made using a UL-listed double-hole lug 1/4in and 5/8in. center-to-center (lug part # Panduit LCD6-14A-L or equivalent) ( Figure 2-11).
Step 4 To accommodate future upgrades, leave a service loop (1.5ft [60cm]) at the side of the shelf.
Figure 2-11 Installing the 1 RU Distribution Shelf Ground
2.3 Install AC Power Cables
Each rectifier in the system shelf is individually powered through a 110/230 V AC single phase 15A circuit and draws a maximum of 9.1A.
Each rectifier position in the shelf can be powered by either:
•208/220/240V AC split phase
•230V single phase
•110V single phase
•Max current per position (9.1A)
Note Rectifier output capacity at 110 VAC is reduced to less than half of the maximum output.
•Locate the power shut-off switch for the installation area
•Install the system using the following electrical codes:
–United States National Electrical Code (NEC)
–Canadian Electrical Code (CEC)
–International Electromechanical Commission (IEC)
–Any local or site specific codes
–EN60950
Warning Installation of the equipment must comply with local and national electrical codes. Statement 1074
•Never install damaged or malfunctioning equipment.
To install AC power to the Cisco AC/DC Power System:
Step 1 Ensure that input circuit breakers or fuses are off or removed and the cable is not connected to the outlet.
Step 2 To aid in future expansion, all AC cable positions should be connected to the rear of the shelf during installation.
Step 3 The system shelf is supplied with four AC cables. Each AC cable provides power to individual rectifier positions. The cable is terminated to allow for local plug requirements.
Note A 15A circuit (for both 110 and 208V AC) should be used based on maximum AC input per rectifier (9.1A).
Step 4 The rear system shelf cover should already be removed, if not, remove it.
Step 5 Locate the cables at the rear of the system shelf.
Step 6 Attach the ferrule end of the cables (Ground (G), L1, and L2 (neutral) to the system shelf AC receptacle by inserting (the ferrule will only fit in one direction) and tightening with a flat screwdriver ( Figure 2-12).
Figure 2-12 Installing the AC Cable Shelf
Step 7 After attaching the AC cables, route the cables at the rear of the shelf using the supplied tie-offs to secure the cables and exit at the sides of the shelf ( Figure 2-13).
Figure 2-13 Routing AC Cables
Step 8 AC cabling is routed through either side of the system shelf and secured using tie off points.
Step 9 AC cabling should be tied off inside the cabinet/rack.
Step 10 Repeat for all AC cables.
Step 11 Connect the terminated AC plug to the AC receptacle at the install location.
Note A separate AC receptacle is required for each AC cable, and each receptacle should be on its own circuit breaker to maximize protection against AC circuit breaker failure.
Table 2-4 Individual AC Feed Specifications
Shelf Size
|
Rectifier Positions
|
AC Input (Fuse or Breaker) 110/208 VAC Single Phase
|
Minimum AC Wire Gauge
UL Style SOOW
|
19 inch
|
1
|
15A
|
14 AWG (2.5mm²)
3 conductor
|
19 inch
|
2
|
15A
|
14 AWG (2.5mm²)
3 conductor
|
19 inch
|
3
|
15A
|
14 AWG (2.5mm²)
3 conductor
|
19 inch
|
4
|
15A
|
14 AWG (2.5mm²)
3 conductor
|
2.3.1 Install the Rectifiers
To install the rectifiers in the Cisco AC/DC Power System:
Step 1 Locate the first (left-most when viewed from the front) rectifier install location.
Step 2 Make sure that the rectifier handle is in the OPEN position (handle pulled away from the rectifier body).
Step 3 Place the module in front of the correct mounting slot on the shelf with the handle facing out ( Figure 2-14 #1).
Step 4 Slide the module until it contacts the interface connection at the rear of the shelf.
Step 5 Fully insert the rectifier by pushing the module handle towards the shelf; the handle will rise up and lock the module into place ( Figure 2-14 #2).
Figure 2-14 Installing a Rectifier
Step 6 Tighten the handle-mounted common screws into the rectifier to ensure a firm connection ( Figure 2-14 #2).
Step 7 Repeat this procedure for any additional modules (two total for small systems, three for medium systems, and four for large systems. Some systems may require removing blank rectifier faceplates. To do this, remove the two Phillips screws from the blank rectifier faceplate ( Figure 2-15 #1). Remove the blank rectifier faceplate mounting bracket by removing the two Phillips screws ( Figure 2-15 #2).
Figure 2-15 Removing a Rectifier Blank Faceplate
Step 8 Install additional rectifiers using the instructions in Steps 2 through 5.
For more information on installing rectifiers in a powered system, see the "Add Modules" section.
2.4 Install Circuit Breakers
Note This procedure is optional for large systems.
Large systems equipped with the 1 RU Distribution Shelf require the installation of circuit breakers to ensure proper system protection (the 1 RU Distribution Shelf is shipped with circuit breakers installed for use in medium systems). To install circuit breakers in a large system:
Step 1 Make certain all breakers to be installed are in the OFF position ( Figure 2-16).
Figure 2-16 Circuit Breaker On/Off Positions
Step 2 Remove the 1 RU Distribution Shelf faceplate by loosening the two thumbscrews on the shelf faceplate ( Figure 2-17).
Figure 2-17 Removing the 1 RU Distribution Shelf Faceplate
Step 3 Locate the circuit breaker installation locations inside the 1 RU Distribution Shelf (positions A1, A2, B1, and B2) (see Table 2-5). Circuit breakers should be installed with the protective hood (covering the ON position) on the left side of the shelf ( Figure 2-16) to allow the 1 RU Distribution Shelf faceplate to be correctly installed.
Step 4 Attach the circuit breaker alarm cables to the rear of the circuit breaker; the alarm cables are labeled C (Common) and NC (Normally Closed) and are attached to the positions shown in Figure 2-16.
Table 2-5 Circuit Breaker Positions
System Size
|
A1
|
A2
|
B1
|
B2
|
Small
|
n/a
|
n/a
|
n/a
|
n/a
|
Medium
|
X
|
1
|
|
|
Large
|
X
|
X
|
X
|
X
|
Step 5 Gently glide the breaker so that the quick disconnect plugs are aligned with the mounting holes ( Figure 2-18).
Figure 2-18 Installing a Circuit Breaker
Step 6 Push the breaker until the quick disconnect plugs are firmly seated in the mounting holes.
Step 7 Repeat for additional breaker.
Step 8 Replace the 1 RU Distribution Shelf faceplate and tighten the thumbscrews.
2.4.1 Install the Alarm Cable
The following explains how to install alarm communication cabling to the Cisco AC/DC Power System Controller.
Warning Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV) requirements in IEC 60950 based safety standards. Statement 1033
Note Alarm cables run from the rear right of the shelf through the power shelf ( Figure 2-20) to the front alarm interface board connectors; remove the controller faceplate and slide the controller tray forward to access the alarm interface board.
To install alarm cabling to the Cisco AC/DC Power System:
Step 1 Remove the system shelf faceplate (by loosening the two front thumbscrews) to access the controller sliding drawer ( Figure 2-19).
Figure 2-19 Removing the Controller Faceplate
Step 2 Slide the drawer out and away from the system shelf to access the alarm interface board.
Step 3 The terminal block may be removed to make alarm cable connections ( Figure 2-20).
Figure 2-20 Installing an Alarm Cable
Step 4 Alarm contacts labeled 1 through 4, NO, C, and NC refer to the OFF state of the power system and alarmed condition ( Table 2-6).
Table 2-6 Alarm and Jumper Designations
Jumper (System with LCD)
|
Jumper (System without LCD)
|
Alarm Designation
|
1
|
2
|
3
|
4
|
J16 (1-3)
|
J16 (1-3)
|
Low Voltage
|
X
|
|
|
|
J15 (1-3)
|
J15 (1-3)
|
Mains Error
|
|
X
|
|
|
J14 (1-3)
|
J14 (1-3)
|
Module Failure
|
|
|
X
|
|
J14 (4-6)
|
J13 (1-3)
|
Fuse/Circuit Breaker Failure
|
|
|
|
X
|
Note Either NO or NC can be used for alarming. Figure 2-20 depicts the NC connection in the 1 and 3 positions on the connectors.
Step 5 The terminal blocks (green) will accept 26AWG (0.14mm²) to 22AWG (0.34mm²) cables. Remove the terminal block ( Figure 2-20 #1).
Step 6 Insert the stripped alarm cables and tighten using a flat screwdriver ( Figure 2-20 #2). Refer to Figure 2-21 (Version 2 of the controller) and Figure 3-4 on page 3-5 (Version 1 of the controller) for information on alarm connection locations.
Figure 2-21 Alarm Board Connection Points
Step 7 Reinsert the terminal block ( Figure 2-20 #3).
Step 8 Alarm cables run from the rear of the system shelf (leaving enough of a service loop to allow the drawer to slide out) through the access window (between the controller drawer and the GMT drawer area) ( Figure 2-20).
Step 9 Secure the alarm cables using the provided strain relief tie-offs to aid in cable management.
2.5 Install Load-and-Return Connections
The following section contains information on installing different distribution options available for the power system. Table 2-7 provides a list of recommended wire gauges for both the GMT fuse panel and the 1 RU Distribution Shelf.
Table 2-7 Recommended Wire Sizes
Wire Gauge Stranded
|
Applications
|
10 to 8 AWG
(6mm² to 10mm²)
|
Breaker Load (up to 30A)
|
22 AWG (0.34mm²)
|
2A GMT Fuses
|
18 AWG (0.75mm²)
|
5A GMT Fuses
|
14 AWG (2.5mm²)
|
10A GMT Fuses
|
14 AWG (2.5mm²)
|
15A GMT Fuses
|
2.5.1 Install GMT Fuse Connections
Load connections to the GMT fuse panel are made using spring loaded terminals that do not require the use of connection lugs.
Step 1 Locate the GMT fuse connections by removing the controller faceplate ( Figure 2-19) and sliding the GMT drawer out ( Figure 2-22).
Figure 2-22 GMT Drawer
Step 2 Route the GMT load-and-return cabling from the rear of the system shelf (leaving enough of a service loop to allow the drawer to slide out) through the fuse panel channel and secure using the supplied tie-downs.
Step 3 Connect the wires to the appropriate terminal by using a flat screwdriver to open the terminal ( Figure 2-23) and inserting the appropriate cable into the spring-loaded terminals. Terminals correspond to fuses: Side A (1-5) and Side B (1-5) from left to right (viewed from the front of the system).
Figure 2-23 Installing GMT Cabling
Step 4 Connect cables to equipment that requires the supplied DC Power per that equipment's specifications.
Step 5 Install fuses by sliding them into the appropriate slot ( Figure 2-24).
Figure 2-24 Installing Fuses
Note An empty space should be left on each side of any 15A GMT fuse used for thermal considerations.
2.5.2 Install 1 RU Distribution Shelf Load Connections
The following section is for systems that use the 1 RU Distribution Shelf. For systems without the 1 RU Distribution Shelf, go to "System Operation."
Step 1 Select the wire gauge for the application. See Table 2-7 for wiring information.
Step 2 Locate the load-and-return connections at the rear of the 1 RU Distribution Shelf ( Figure 2-25).
Step 3 Remove the Phoenix Contact PC6™ connectors from the 1 RU Distribution Shelf by loosening the flat screws and pulling the connectors away from the 1 RU Distribution Shelf ( Figure 2-25 #1).
Figure 2-25 Installing Load Connections
Step 4 Connect the wires to the appropriate terminal for the load-and-return connections by inserting and then tightening the connector (Phoenix Contact PC6™ connectors) ( Figure 2-25 #2, #3). Allow enough of a service loop to allow for the removal of the 1 RU Distribution Shelf.
Step 5 Reinstall the Phoenix Contact PC6™ connector to the 1 RU Distribution Shelf ( Figure 2-25 #3).
Step 6 Reconnect to the 1RU Distribution Shelf ( Figure 2-25 #4).
Step 7 Connect the load-and-return cables to the equipment that requires the supplied DC Power per that equipment's specifications.
Step 8 Repeat for additional DC cabling.
2.6 System Upgrades
If the installation is an upgrade of a pre-existing system, the following sections give a list of the procedures needed to upgrade the system:
• GMT Fuses
• Small to Medium System Upgrade
• Medium to Large System Upgrade
• Small to Large System Upgrade
Review the following sections before attempting a system upgrade:
• Ground Symbol
• Tools Required
• Installation Materials
Note Some upgrade connections may require access to the rear of the system. If rear access is not available, all rear connections are required to have a service loop that allows the 1 RU Distribution Shelf to be pulled out (after unscrewing the cabinet/mounting screws) to allow for access. For information on removing the 1 RU Distribution Shelf see 3.2.1 Replace the 1 RU Distribution Shelf, page 3-1.
2.6.1 GMT Fuses
To add fuses to the GMT fuse block, see the "Install GMT Fuse Connections" procedure.
2.6.2 Small to Medium System Upgrade
To upgrade a small system (2 rectifiers, no 1 RU Distribution Shelf) to a medium system (3 rectifiers, 1 RU Distribution Shelf with 2 circuit breakers), use the following sections:
• Install the 1 RU Distribution Shelf
• Install the Communications Cabling (Optional)
• Install the DC Power Cabling (Optional)
• Install the 1 RU Distribution Shelf Ground
• Install the Rectifiers
• Install 1 RU Distribution Shelf Load Connections
2.6.3 Medium to Large System Upgrade
To upgrade a medium system (3 rectifiers, 1 RU Distribution Shelf with 2 circuit breakers) to a large system (4 rectifiers, 1 RU Distribution Shelf with 4 circuit breakers), use the following sections:
• Install the Rectifiers
• Install Circuit Breakers
• Install 1 RU Distribution Shelf Load Connections
2.6.4 Small to Large System Upgrade
To upgrade a small system (2 rectifiers, no 1 RU Distribution Shelf) to a large system (4 rectifiers, 1 RU Distribution Shelf with 4 circuit breakers), use the following sections:
•All of the steps for upgrading from the "Small to Medium System Upgrade" section
•All of the steps for upgrading from the "Medium to Large System Upgrade" section
