American Power Conversion VS 100, VS 50 User Manual
Magnum VS 100
-48 Vdc Power Systems
Magnum VS 50
User Manual
990-1479E 05/2007
Table of Contents
1 Introduction ............................................................................................................................................................6
1.1. GENERAL INFORMATION ....................................................................................................................................6
2 Installation..............................................................................................................................................................9
2.1. UNPACKING EQUIPMENT ...................................................................................................................................9
2.2. MECHANICAL INSTALLATION...............................................................................................................................9
Room / Location.....................................................................................................................................................9
Mounting ................................................................................................................................................................9
Ventilation ..............................................................................................................................................................9
2.3. AC POWER CONNECTIONS ..............................................................................................................................10
AC Connections...................................................................................................................................................10
AC Power Cord Sets............................................................................................................................................11
2.4. BATTERY CONNECTIONS .................................................................................................................................12
Planning the Battery installation ..........................................................................................................................12
Connecting the Cables ........................................................................................................................................12
Battery Temperature Probe Installation...............................................................................................................13
2.5. COUNTER ELECTRO-MOTIVE FORCE (CEMF) CELL CONNECTIONS ...................................................................13
2.6. DC SYSTEM GROUNDING ................................................................................................................................14
2.7. LOAD PROTECTION INSTALLATION....................................................................................................................15
Circuit Breaker Installation...................................................................................................................................15
GMT Fuse Installation..........................................................................................................................................15
2.8. LOAD CONNECTIONS.......................................................................................................................................15
Cable Size Considerations ..................................................................................................................................15
Circuit Breaker Protected Load Connections (30 or 60 A) ..................................................................................16
GMT Fuse-protected Load Connections .............................................................................................................16
2.9. MONITORING AND RELAY OUTPUT CONNECTIONS.............................................................................................17
Front Panel DB9 Connection...............................................................................................................................17
RJ45 Ethernet Connector ....................................................................................................................................17
Major, Minor and Relay 1 Output Connections....................................................................................................17
Output Relay 2-6 Connections ............................................................................................................................18
External Alarm Input Connections .......................................................................................................................19
2.10. RECTIFIER MODULE INSTALLATION ............................................................................................................... 20
2.11. CONTROLLER MODULE INSTALLATION ..........................................................................................................20
3 Commissioning ....................................................................................................................................................21
3.1. PRE-COMMISSIONING INSPECTION...................................................................................................................21
Environment.........................................................................................................................................................21
Electrical Installation ............................................................................................................................................21
Battery Visual and Safety Inspection...................................................................................................................21
3.2. COMMISSIONING .............................................................................................................................................22
Initial Set-up.........................................................................................................................................................22
AC Power Up .......................................................................................................................................................22
DC Power Up:......................................................................................................................................................22
Rectifier Test:.......................................................................................................................................................23
Battery Power Up.................................................................................................................................................23
LVD Test..............................................................................................................................................................23
Circuit Breaker/ Fuse Test: ..................................................................................................................................23
User Inputs ..........................................................................................................................................................23
Output Relay 1:....................................................................................................................................................24
Battery Temperature Compensation ...................................................................................................................24
3.3. FINAL INSPECTION: .........................................................................................................................................24
4 Technical Description ..........................................................................................................................................25
4.1. RECTIFIER MANAGEMENT................................................................................................................................25
AC Input Power....................................................................................................................................................25
DC Output Power.................................................................................................................................................25
Rectifier alarms reporting.....................................................................................................................................25
4.2. SYSTEM MANAGEMENT ...................................................................................................................................25
System Voltage Monitor and Control...................................................................................................................25
Magnum VS –48 Vdc User Manual Page ii
System Current Monitor.......................................................................................................................................26
System Status and Alarm Reporting ...................................................................................................................26
4.3. LOAD MANAGEMENT .......................................................................................................................................26
Circuit Breakers ...................................................................................................................................................26
GMT Fuses ..........................................................................................................................................................27
4.4. BATTERY MANAGEMENT..................................................................................................................................27
Battery Charging..................................................................................................................................................27
Battery Protection ................................................................................................................................................28
Battery Temperature Monitoring..........................................................................................................................28
Battery Temperature Compensation ...................................................................................................................28
Battery Low Voltage Disconnect..........................................................................................................................28
Counter Electro-Motive Force Module Connections............................................................................................28
4.5. CONTROLS AND INDICATORS ...........................................................................................................................29
Controller Module ................................................................................................................................................29
4.6. ALARM OUTPUTS (OUTPUT RELAYS)................................................................................................................29
4.7. EXTERNAL ALARM INPUTS (USER INPUT)..........................................................................................................29
4.8. NETWORK MANAGEMENT CARD - LOCAL & REMOTE MONITORING .....................................................................29
5 Operation .............................................................................................................................................................30
5.1. DESCRIPTION .................................................................................................................................................30
5.2. CONTROLLER MODULE JUMPERS..................................................................................................................... 30
System Voltage J5...............................................................................................................................................30
Remote Lockout J8..............................................................................................................................................30
Firmware Programming Enable J9 ......................................................................................................................30
Vtrim Trip Select J13 ...........................................................................................................................................30
CONTROLLER MODULE ..............................................................................................................................................31
5.3. OPERATION USING THE RS-232 COMM PORT ..................................................................................................32
5.4. OPERATION USING THE 10/100 BASET ETHERNET PORT.................................................................................. 33
5.5. OPERATION USING NETWORK MANAGEMENT CARD WEB BROWSER INTERFACE ................................................33
5.6. LVD OPERATION ............................................................................................................................................41
5.7. PROGRAMMING OUTPUT RELAYS..................................................................................................................... 41
6 Preventive Maintenance ......................................................................................................................................42
6.1. EQUIPMENT ....................................................................................................................................................42
6.2. INSPECTION ....................................................................................................................................................42
Environmental Inspection ....................................................................................................................................42
System Visual and Safety Inspection ..................................................................................................................42
Battery Visual and Safety Inspection...................................................................................................................43
6.3. TEST ..............................................................................................................................................................43
System Voltage Test............................................................................................................................................43
Rectifier Current Share Test................................................................................................................................43
System Current Test............................................................................................................................................43
Rectifier Alarm Test .............................................................................................................................................43
System Temperature Test ...................................................................................................................................43
Battery Current Test ............................................................................................................................................44
Battery Temperature Test....................................................................................................................................44
LVD Test..............................................................................................................................................................44
Battery Preventive Maintenance Procedure ........................................................................................................44
6.4. FINAL INSPECTION: .........................................................................................................................................45
7 Alarm Summary ...................................................................................................................................................46
8 Specifications.......................................................................................................................................................48
8.1. AC INPUT .......................................................................................................................................................48
TWF0500H54B Rectifier......................................................................................................................................48
Magnum VS 50 Power System............................................................................................................................48
Magnum VS 100 Power System..........................................................................................................................48
8.2. DC OUTPUT ...................................................................................................................................................49
TWF0500H54B Rectifier......................................................................................................................................49
Magnum VS 50 Power System............................................................................................................................49
Magnum VS 100 Power System..........................................................................................................................50
8.3. CONTROLS AND INDICATORS ...........................................................................................................................50
TWF0500H54B Rectifier......................................................................................................................................50
Magnum VS –48 Vdc User Manual Page iii
M
AGNUM VS CONTROLLER ........................................................................................................................................50
8.4. MECHANICAL ..................................................................................................................................................51
TWF0500H54B Rectifier......................................................................................................................................51
Magnum VS 50 Power System............................................................................................................................51
Magnum VS 100 Power System..........................................................................................................................51
8.5. ENVIRONMENTAL ............................................................................................................................................51
8.6. COMPLIANCE ..................................................................................................................................................52
8.7. COMPLIANCE ..................................................................................................................................................52
8.8. COMPLIANCE ..................................................................................................................................................52
9 APC Worldwide Customer Support .....................................................................................................................53
10 Limited Product Warranty ................................................................................................................................54
TWO YEAR FACTORY WARRANTY ...............................................................................................................................54
10.1..........................................................................................................................................................................54
Table of Figures
FIGURE 1.1-1 MAGNUM VS 50 –48 VDC POWER PLANT .................................................................................................... 6
FIGURE 1.1-2 MAGNUM VS BLOCK DIAGRAM.................................................................................................................... 8
FIGURE 2.3-1 MAGNUM VS 50 BACKPLANE....................................................................................................................... 10
FIGURE 2.3-2 AC INPUT WIRING........................................................................................................................................... 10
FIGURE 2.4-1 BATTERY CABLE CONNECTION LOCATIONS .......................................................................................... 13
FIGURE 2.4-2 BATTERY TEMPERATURE PROBE INSTALLATION ................................................................................. 13
FIGURE 2.5-1 CEMF CONNECTION LOCATIONS................................................................................................................ 14
FIGURE 2.7-1 GMT FUSE TEMPERATURE DE-RATING CHART....................................................................................... 15
FIGURE 2.8-1 CONNECTIONS TO CIRCUIT BREAKERS.................................................................................................... 16
FIGURE 2.8-2 TOP SHELF GMT FUSE CONNECTIONS....................................................................................................... 16
FIGURE 2.8-3 BOTTOM SHELF GMT FUSE CONNECTIONS..............................................................................................17
FIGURE 2.9-1 INTERFACE CONNECTIONS .......................................................................................................................... 18
FIGURE 2.9-2 OUTPUT RELAY CONNECTIONS.................................................................................................................. 19
FIGURE 2.9-3 EXTERNAL USER INPUT CONNECTIONS ................................................................................................... 19
FIGURE 5.2-1 CONTROLLER CARD JUMPER LOCATIONS............................................................................................... 31
FIGURE 0-1 MAGNUM VS CONTROLLER............................................................................................................................ 32
FIGURE 5.5-1 PARAMETER LOCATIONS, DESCRIPTIONS, AND SETTINGS................................................................. 34
Entire contents copyright 2007 American Power Conversion. All rights reserved. Reproduction in whole or in part
without permission is prohibited.
APC and the APC logo are trademarks of American Power Conversion Corporation. All other trademarks, product
names, and corporate names are the property of their respective owners and are used for informational purposes
only.
Magnum VS –48 Vdc User Manual Page iv
1 Introduction
1.1. General Information
The APC Magnum VS is a modular -48 Vdc power plant. The Magnum VS has unique features that make it
easy to install, maintain, and upgrade. There are two Magnum VS models; Magnum VS 50 and 100. The
Magnum VS 50 is a single shelf system and can support up to 5, 10A rectifiers, for a rated current of 50A.
The Magnum VS 100 is a dual shelf system and can support up to 10, 10A rectifiers, for a rated current of
100A. The rectifier units are modular and “hot-swappable” making it easy to add or remove rectifiers as
dictated by capacity requirements, without having to change the input or output wiring.
There are two basic DC output distribution options, circuit breakers (30A or 60A) or GMT-style fuses. The
DC output distribution module also includes terminals to connect a battery string and a low voltage
disconnect (LVD) device to disconnect the batteries after a deep discharge.
The system controller module provides monitoring and control functions for each component of the
system, and stores alarm events for system diagnosis and maintenance. The system controller module
enables the user to change/update Magnum VS settings, as well as monitor the system via a local
computer directly connected to the Magnum VS system (using the serial cable provided by APC (please
note that a standard serial cable cannot be used; the APC-provided serial cable must be used to connect
directly to the Magnum VS system)), or a remote computer connected to the system over a network using a
10/100 Base-T Ethernet connection.
Figure 1.1-1 Magnum VS 50 –48 Vdc Power Plant
A fully equipped Magnum VS 50 power system is shown in Figure 1.1-1.
Magnum VS system and accessory SKUs are listed below:
Magnum VS –48 Vdc User Manual Page 6
SKU
Description
DCM00K03SGMT Magnum VS 50, Basic Controller and Integrated Network
Management Card (NMC), One (1) 1TWF0500H54B 10 A
Rectifier, and One (1) GMT Distribution Module (8 Fuse
Positions)
DCM00K03S2X30 Magnum VS 50, Basic Controller and Integrated Network
Management Card (NMC), One (1) 1TWF0500H54B 10 A
Rectifier, and One (1) Circuit Breaker (CB) Distribution
Module (2–30 A Circuit Breakers)
DCM00K03S1X60 Magnum VS 50, Basic Controller and Integrated Network
Management Card (NMC), One (1) 1TWF0500H54B 10 A
Rectifier, and One (1) CB Distribution Module (1–60A Circuit
Breaker)
DCM00K06SGMT Magnum VS 100, Basic Controller and Integrated Network
Management Card (NMC), One (1) 1TWF0500H54B 10 A
Rectifier, and Two (2) GMT Distribution Modules (8 Fuse
Positions (Each))
DCM00K06S4X30 Magnum VS 100, Basic Controller and Integrated Network
Management Card (NMC), One (1) 1TWF0500H54B 10 A
Rectifier, and Two (2) CB Distribution Modules
(2–30 A Circuit Breakers (Each))
DCM00K03S2X60 Magnum VS 100, Basic Controller and Integrated Network
Management Card (NMC), One (1) 1TWF0500H54B 10 A
Rectifier, and Two (2) CB Distribution Modules
(1–60 A Circuit Breaker (Each))
Accessories
1TWF0500H54B Magnum VS 10A Rectifier
DCMOPTCS1 AC Input Cable Kit; Includes Two (2) 12ft, 10 AWG, L6-30P
Power Cords
DCMOPT23RM Magnum VS 50/100 Mounting Bracket Kit; For 23”
Racks/Frames
DCMOPTBATE EMEA Battery Kit: 2U 19” Battery Disconnect Module with
Four (4) 100 A Disconnect Breakers and Battery Cable Kit
DCMOPTBATN North America Battery Kit: 19”-Frame Battery Tray, Circuit
Breaker Kit, Battery Termination Bus Assembly, and Battery
Cable Kit.
DCBT005 DC System Battery Module: -48V Battery String (Power
Battery CSL-12100) with Hardware Kit
Magnum VS –48 Vdc User Manual Page 7
BATTERY
SHUNT
BATTERY (–)
BATTERY
LVD
CONTROL BUS
Energized
BATTERY (+)
2 Visual Alarms
(1 per group of 4)
TX2 Relay
8 outputs: Rear
( 0P1849 )
GMT Load Distribution Module
BATTERY
SHUNT
BATTERY (–)
BATTERY
LVD
CONTROL BUS
Energized
BATTERY (+)
Visual Alarm
Stud outputs:
Rear
TX2 Relay
Visual Alarm
2 CB Load Distribution Module ( 0P1852 )
TOP SHELF
-PWR
Power Distribution Backplane
Control
TRM15
DC
GND
( 0P1839 )
AC
Control
DC
AC
GND
L1 L2/N
Bus Bars
Control
DC
AC
Control
DC
GND
L1 L2/N
BOTTOM SHELF
AC
Control
+PWR
CONTROL BUS
DC
GND
L1 L2/N
-PWR
+PWR
CONTROL BUS
AC
Signals Cable
Power Distribution Backplane
DC
DC
DC
DC
DC
Control
AC
Control
AC
Control
AC
Control
AC
Control
AC
GND
GND
GND
GND
TRM15
( 0P1839 )
L1 L2/N
Figure 1.1-2 Magnum VS BLOCK DIAGRAM
L1 L2/N
100 Amp System Only
L1 L2/N
ALM IN_1
1
ALM IN_2
ALM IN_3
234
USER
RESET
ALM IN_4
WEB
ALM RTN
ALM RTN
567
ALARM
ALM RTN
INPUTS
SNMP Card
ALM RTN
MAJ NC
1
8
( AP9617 )
PORT
COMM
MAJ C
234
MAJ NO
MIN NC
MIN C
56789
RELAY
ALARM
MIN NO
USER NC
USER C
OUTPUTS
USER NO
DB-9
TMP
1
234
BATTERY
Microprocessor
PORT
-BAT
+12 PWR
TEMPERATURE
Control Board
DC OK
1
234
PROBE
COVERED
CONTROL BUS
( 0P1838 )
MINOR
MAJOR
OUT RLY
567
1
234
8
56789
COVERED
1
234
COVERED
Blank Panel
Magnum VS –48 Vdc User Manual Page 8
2 Installation
2.1. Unpacking Equipment
Remove equipment from packing material and inspect for shipping damage or missing items. It is important to
report damage or material shortages to the shipping carrier while a representative is on site.
If concealed damage or material shortages are found at a later time, contact the shipper to make arrangements for
inspection and claim filing. Refer to Section Error! Reference source not found. in the event it is necessary to
return equipment to APC.
CAUTION: Appropriate lifting techniques and safety equipment should be used to remove
equipment from packing.
RECYCLE: The shipping materials can be recycled. Save them for later use or dispose
properly.
2.2. Mechanical Installation
Room / Location
NOTE: The APC dc power plant is to be installed in a room, vault, or similar enclosure accessible only to qualified
persons in accordance with the national and local electrical codes.
Prior to installation, drawings, floor loading requirements, external alarm points, ac service entrance, and grounding
schemes should all be checked and confirmed. If batteries are to be mounted in a room separate from the power
plant, careful attention should be paid to battery cable voltage drop effects. Environmental operating temperatures
and ventilation/cooling considerations should also be noted, not just for the power system but also for all other
equipment that may reside in the power room area.
Mounting
The Magnum VS 50 and 100 include brackets to mount the system in a standard EIA 19” rack. Install the
power system using hardware designed for the rack. To install a Magnum VS 50 or 100 in a 23-inch rack
use the 23” Mounting Bracket Kit (DCMOPT23RM).
Ventilation
The rectifier modules for this system have fans that provide front-to-rear airflow for internal cooling. The power
system housing should be mounted such that there is free airflow to the front and back of the unit. [Refer to
Section 8.5 for environmental characteristics.] Free airflow should be ensured so that the power system can
provide full power without de-rating.
Magnum VS –48 Vdc User Manual Page 9
2.3. AC Power Connections
WARNING: Ensure that all of the external dc and ac circuit breakers are in the OFF position
prior to connecting service to the power plant. Confirm that all voltages have been removed
including any battery sources before proceeding
AC Connections
The Magnum VS DC power system, specifically each rectifier, requires a single phase input AC supply
(Range: 85–264 VAC, 47–63 Hz) to operate. Each Magnum VS shelf has three (3) sets of input terminals
(TRM 2, 5, 8; TRM 3, 6, 9; and TRM 4, 7, 10). As a result, each Magnum VS shelf can be wired such that
three (3) different AC sources (e.g., three phase, delta or star, connections) provide power to the rectifiers
(see Figure 3.3-2), or, a single AC source is used to provide power to the rectifiers, and jumper cables are
used to interconnect the different input terminals (as appropriate, and provided the input wiring is not
overloaded; see Figure 3.3-1).
The Magnum VS 50 SKUs are shipped configured (including the appropriate jumper cables) for operation
from a single AC source.
The Magnum VS 100 SKUs are shipped configured (including the appropriate jumper cables) for operation
from two AC sources (one for each shelf).
.
Figure 2.3-1 Magnum VS 50 Backplane
If a single AC source is used it is typically connected to TRM 10 (Line), 7 (Neutral) and 4 (Ground).
Rectifier Terminal # Function Terminal # Function Terminal # Function
Rectifier 1 TRM2 Ground TRM5 Line or Neutral TRM8 Line
Rectifier 2 & 3 TRM3 Ground TRM6 Line or Neutral TRM9 Line
Rectifier 4 & 5 TRM4 Ground TRM7 Line or Neutral TRM10 Line
Chassis TRM1 Ground
Figure 2.3-2 AC Input Wiring
Magnum VS –48 Vdc User Manual Page 10
Each phase should be wired for a minimum of 15 A.
The rear cover of each Magnum VS shelf in the power system has two 1.125-inch (2.858 cm) diameter holes
for electrical conduit. Conduit can be run to each Magnum VS shelf, or, alternatively, strain relief is
provided for the direct installation of AC power cables. Please note that the ambient temperature and the
number of wires in a conduit must be considered in accordance with national and local wiring code
requirements (e.g., NEC).
AC Power Cord Sets
The AC power cord sets are not included with the Magnum VS DC System, and must be purchased
separately, or provided by the Licensed Electrician installing the system.
APC offers a standard AC input cable kit that includes two (2), 12 foot, 10 AWG, L6-30P power cords (SKU:
DCMOPTCS1).
WARNING: Hazardous ac voltage levels are present inside the power system. Keep the
rear cover in place when the system is operational or energized.
Magnum VS –48 Vdc User Manual Page 11
2.4. Battery Connections
WARNING: Hazardous energy levels are present on bare conductors in the DC distribution
connection area of the plant. Accidental shorting of distribution conductors can cause
arcing and high currents that can cause serious burns or other physical harm. It is
recommended to:
Remove any jewelry, rings, or watches while working on this equipment.
• Use insulated wrenches, screwdrivers, cutters, pliers and other tools.
WARNING: Rectifier output DC circuits will be damaged if the batteries are installed
incorrectly. Ensure proper battery polarity and that the battery is isolated from the rest
of the system.
Planning the Battery installation
The battery cable(s) should be sized to limit the voltage drop from the dc power plant to the battery during charging
per system design requirements. The cable(s) must also carry the full load current during battery operation. If
assistance is required to determine the necessary cables for the application, contact your sales representative or
APC (Refer to Section Error! Reference source not found. for APC Customer Support information). A fuse or
circuit breaker (various options are available from APC) is recommended in the negative line to protect the cables
from the battery to the DC power plant. If a circuit breaker is used, the power plant can monitor auxiliary contacts
from this breaker.
Connecting the Cables
WARNING: Make certain that the battery polarity is correct when making connections
to the DC power plant. Incorrect connections can cause severe equipment damage.
The battery cable connections are located at the rear of the unit as shown in Figure 2.4-1. The battery positive and
battery negative buses each provide a pair of #10-32 studs on 5/8” centers for connecting two-hole battery cable
lugs. A ring size of 6 mm may also be used. Connect the battery cables as applicable using #10-32 nuts. Cover
connections with heat shrink after assembly.
Battery Negative
Connection
Battery Return
Connection
Magnum VS –48 Vdc User Manual Page 12
Figure 2.4-1 Battery Cable Connection Locations
Battery Temperature Probe Installation
The temperature probe is used to monitor the battery string temperature. To get the most representative
temperature measurement, the probe should be placed in contact with a battery cell that is centrally located. The
probe should be placed directly in contact with the cell (not the frame surrounding the cell). Generally, the cell
cover can be used; be careful not to allow the probe body to touch the terminals. Plug the connector end of the
temperature probe into J410 of the backplane card. Route the cable as required positioning the probe on the
selected battery cell. Remove the adhesive protection strip from the probe body and press the adhesive side of the
probe on the battery cell cover. Refer to Figure 2.4-2 for details.
Note: Program Hardware Battery Temperature Alarm to “Ignore” if no battery temperature probe is
connected to J410.
Battery
Temperature
Probe Connector
J410 (Rear Cover
Removed)
Figure 2.4-2 Battery Temperature Probe Installation
2.5. Counter Electro-Motive Force (CEMF) Cell Connections
WARNING: Hazardous energy levels are present on the CEMF connection area of the
plant. Accidental shorting of conductors can cause arcing and high currents that can cause
In some applications, a CEMF cell is used to lower the dc voltage delivered to the loads. The CEMF cell is
mounted externally to the Magnum VS. The CEMF connections are located at the rear of the unit as shown in
Figure 2.5-1. Two bus-plates, installed at the factory, bypass the CEMF connection. If a CEMF cell will be used,
remove the bus plate connecting the two CEMF connection points and install two connection buses before installing
the CEMF. The CEMF connection buses each provide a pair of #10-32 studs on 5/8” centers for connecting twohole CEMF cable lugs. A ring size of 6 mm may also be used. Connect the CEMF cables as applicable using #1032 nuts.
serious burns or other physical harm.
Magnum VS –48 Vdc User Manual Page 13
CEMF Connections
Figure 2.5-1 CEMF Connection Locations
2.6. DC System Grounding
The positive bus for the power plant should be connected to the Central Office Ground. The Battery Return
provides a pair of #10-32 studs on 5/8-inch centers for connection of a two-hole lugged cable to the Central Office
Ground. A ring size of 6 mm may also be used. Cover this connection with heat shrink tubing after assembly.
Magnum VS –48 Vdc User Manual Page 14
2.7. Load Protection Installation
Circuit Breaker Installation
Standard circuit breaker output distribution modules are available with two 30-A breakers or one 60-A breaker.
Output distribution modules are installed at the factory and are typically not field replaceable units. Contact APC if
the output configuration is not suitable for your needs. Other breaker sizes are not readily available.
GMT Fuse Installation
The standard GMT output distribution module includes eight (8) fuse positions and is installed on the left side of the
Magnum VS shelf. The GMT fuse holders are located on the front panel of the unit. Insert the fuses into the
holder; observing the tripped indicator is correctly oriented. Use the chart shown in Figure 2.7-1 to help determine
what size fuses will carry the desired current. When using several of the larger GMT fuses in one shelf, better heat
dissipation will be achieved if the fuses are spaced out evenly within the output panel. The following GMT-type
fuses are provided by APC with the DCM00K03SGMT or DCM00K06SGMT Magnum VS systems: 1A, 3A, 5A,
7.5A, and 10A.
20° C 50° C 60° C
7.5 A 5 A 4.5 A 4 A
SIZE
FUSE
10 A 7 A 6 A 5 A
15 A 10 A 9 A 8 A
Figure 2.7-1 GMT Fuse Temperature De-rating Chart
AMBIENT TEMPERATURE
2.8. Load Connections
Cable Size Considerations
The DC load cable(s) should be sized to limit the voltage drop from the dc power plant to the loads per system
design requirements. The cable(s) must also carry the full load current during battery operation. During battery
operation the voltage will be lower and for constant power loads, the current will typically be higher. If assistance is
required to determine the necessary cables for the application, contact your sales representative or APC.
Magnum VS –48 Vdc User Manual Page 15
Circuit Breaker Protected Load Connections (30 or 60 A)
The circuit breaker lug landing connection provides a pair of #10-32 studs on 5/8” centers for mounting two-hole
lugs. A ring size of 6 mm may also be used. A right angle bus bar with two studs is provided to land the lugs.
Load Connections should be made as shown in. Cover connections with heat shrink after assembly.
-54 Volt Load Connections
Load Returns
Figure 2.8-1 Connections to Circuit Breakers
GMT Fuse-protected Load Connections
Connections for 1A to 14A loads require a ring terminal with a 0.170 in (4.3 mm) clearance hole and are located at
the rear of the unit. Load connections should be made as shown in Figure 2.8-2 and Figure 2.8-3.
Figure 2.8-2 Top Shelf GMT Fuse Connections
Magnum VS –48 Vdc User Manual Page 16
Figure 2.8-3 Bottom Shelf GMT Fuse Connections
2.9. Monitoring and Relay Output Connections
Front Panel DB9 Connection
The front panel DB-9 connector is used to hook up a standard RS-232 cable (such as APC part number 0129-XX.
A 0129-6 is included with this manual. ). This will allow local access through a Terminal Emulation program such
as HyperTerminal™ or ProComm. ™
RJ45 Ethernet Connector
The management card has an RJ-45 connector to support a TCP/IP protocol over a 10/100 BaseT Ethernet Local
Area Network (LAN).
Major, Minor and Relay 1 Output Connections
There are three output relays available that provide outputs via Form “C” contacts. The output relays are named
Minor, Major and Out Relay 1. Various system alarm conditions can be assigned to any of these three output
relays. Most alarm conditions are shipped programmed to Minor or Major Relay. Wago connectors are located on
the backplane card mounted in the left rear of the unit. Refer to the board layout in Figure 2.9-1 for Output Relay
connections. The Wago connectors accept wires 26 AWG to 20 AWG (0.129 mm
relay output, remove ¼ in (6 mm) of insulation from the end of the wire. Push down the white tab on the Wago
connector, insert the stripped wire and release the tab to make the connection. The relay contacts should only be
used to switch resistive loads of 0.5 A or less at 60 V or less. Figure 2.9-2 shows the alarm output connection
designations. Whenever possible use the common and normally closed contacts. If the alarm wiring gets pulled
loose, or the controller is removed, you will get an alarm. The Major relay is energized (C-NO contacts closed)
during normal (non-alarm) operating conditions; the other relays energize when an alarm condition occurs. If your
Major relay wiring uses the C-NO contacts, then a major relay output will be seen whenever the controller is
removed from the shelf.
2
to 0.518 mm2). To connect the
Magnum VS –48 Vdc User Manual Page 17
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