Page 3 - REVISION HISTORY; Revision; JNF
Rev 1 MX28B-1200+27V PRODUCT MANUAL iii REVISION HISTORY Revision Date By Description 1 09/12/2001 JNF Initial release.
Page 5 - Rev 1
Rev 1 MX28B-1200+27V PRODUCT MANUAL v 5.8 C ONNECTING T HE L OADS ............................................................................................................................................. 20 5.8.1 DC Circuit Breakers...................................................................
Page 7 - GENERAL INFORMATION; before beginning actual installation of the power system.; Inspection upon Receipt of Goods; IMMEDIATELY; upon taking delivery while the; STILL ON SITE; . Please be sure that all items are accounted for,
Rev 1 MX28B-1200+27V PRODUCT MANUAL 1 1 GENERAL INFORMATION 1.1 Introduction DC Power Plants from APC have unique features that make them easy to install, maintain, and upgrade. The rectifier units are modular and truly “hot-pluggable” into the shelf assembly without any separate AC wiring. All syst...
Page 8 - ) Request an inspection by the carrier
MX28B-1200+27V PRODUCT MANUAL Rev 1 2 1.3.3 Concealed Damage It is the customer’s responsibility to unpack the power system and equipment received from APC and check for concealed damage. Within 15 days of receipt, check the materials received against the detailed packing list to verify that the qua...
Page 9 - CUSTOMER SERVICE AND SUPPORT; If there is a problem with the power system, contact APC at; WARRANTY PROVISIONS; General Provisions
Rev 1 MX28B-1200+27V PRODUCT MANUAL 3 2 CUSTOMER SERVICE AND SUPPORT APC manufactures a line power plants and provides customers with complete product and systems support and service. APC has an international network of factory trained service technicians. The service organization is on call 24 hour...
Page 10 - Exclusions and Limitations; expressed written consent from APC
MX28B-1200+27V PRODUCT MANUAL Rev 1 4 3.2 Exclusions and Limitations 1. This warranty applies only to the original US domestic purchaser (user) and is not transferable internationally, except with expressed written consent from APC facility in Dallas, Texas. 2. APC reserves the right to void the war...
Page 11 - PRODUCT OVERVIEW AND TECHNICAL DESCRIPTION
Rev 1 MX28B-1200+27V PRODUCT MANUAL 5 4 PRODUCT OVERVIEW AND TECHNICAL DESCRIPTION 4.1 Description The APC Models MX28B1200+27V represents a family of stand-alone +24V DC power plants. Through the use of modular power, a system is configurable in such a manner that it will support most typical appli...
Page 13 - Power Output Capacity
Rev 1 MX28B-1200+27V PRODUCT MANUAL 7 4.2 Power Output Capacity A power frame consists of three rectifier shelves, each shelf accommodating up to four hot-plug, 100 amp rectifiers. A completely configured power frame with 12 rectifiers is rated at 1200 amps. The master control unit provides control ...
Page 14 - Figure 4.3 Power Entry Box
MX28B-1200+27V PRODUCT MANUAL Rev 1 8 4.5 Control Unit The microprocessor -based power system control unit is 1U high (1.75”) and provides control and monitoring functions. Features implemented are: • 32-character alphanumeric display (2 lines by 16 characters) • LED alarm and status indicators • St...
Page 15 - Figure 4.4 Battery Connections; Battery connections
Rev 1 MX28B-1200+27V PRODUCT MANUAL 9 Figure 4.4 Battery Connections 4.7 Battery connections Battery connections are made at the top rear of the unit. The +24V and Battery Return buses each provide two sets of 3/8” -16 holes on 1 inch or 1 ¾ inch centers for connecting two-hole battery cable lugs. R...
Page 17 - Ambient Temperature:; Compliance; NEBS
Rev 1 MX28B-1200+27V PRODUCT MANUAL 11 4.10 Environmental • Ambient Temperature: -4°F to 149°F (-20°C to +65°C) operating -40°F to 185°F (-40°C to +85°C) storage • Humidity: 0% to 85% RH non-condensing operating 0% to 95% RH non-condensing storage • Altitude: Up to10,000 feet (3000m) operating Up to...
Page 18 - INSTALLATION PROCEDURES; Standard selection of insulated hand tools.; It is recommended that:
MX28B-1200+27V PRODUCT MANUAL Rev 1 12 5 INSTALLATION PROCEDURES 5.1 Preparation 5.1.1 Recommended Tools • Standard selection of insulated hand tools. • Proper tools for crimping the selected cable lugs. 5.1.2 Recommended Test Equipment • Digital Multimeter 5.1.3 Equipment Inspection Remove equipmen...
Page 19 - AC; Figure 5-1 Floor Mounting Dimensions
Rev 1 MX28B-1200+27V PRODUCT MANUAL 13 5.1.5 Room/Locations NOTE: The APC Model MX28B1200/2400+27V DC power plant is to be installed in a room, vault, or similar enclosure that is accessible only to qualified persons in accordance with the NEC or the authority having jurisdiction. Prior to installat...
Page 20 - AC Service and Ground Connections; WARNING
MX28B-1200+27V PRODUCT MANUAL Rev 1 14 5.1.7 Ventilation The rectifiers have fans that provide front to rear airflow for internal cooling. The MX28B1200 housing should mounted to allow free airflow from the front and out the top of the unit. [Refer to Section 4.10 for environmental characteristics.]...
Page 21 - Battery Connections
Rev 1 MX28B-1200+27V PRODUCT MANUAL 15 The AC input enclosure, located at the top rear of the MX28B housing, is provided with three pilot holes in the top for attaching external conduit (Figure 5-4), and three 1-inch conduits exiting the bottom for AC wire. AC wiring passing through the conduit will...
Page 22 - Cable Sizing Considerations; CAUTION; DC SYSTEM GROUNDING; Figure 5-5 Battery Connections
MX28B-1200+27V PRODUCT MANUAL Rev 1 16 5.3.2 Cable Sizing Considerations The battery cable(s) should be sized sufficiently large to limit the voltage drop from the MX28B DC power plant to the battery during charging per system design requirements. The cable (s) must also carry the full load current ...
Page 23 - Rectifier Installation; ) Remove the rectifier from its shipping box.; Converter Installation; The converters are also shipped in separate containers.
Rev 1 MX28B-1200+27V PRODUCT MANUAL 17 5.5 Rectifier Installation The rectifiers are shipped in separate containers. Follow the procedure below to ins tall a rectifier. 1) Remove the rectifier from its shipping box. 2) Slide the rectifier into the shelf between the guides until fully seated. 3) Fast...
Page 24 - Alarm Connections; Figure 5-8 Alarm Interface PC Board; Alarm Outputs
MX28B-1200+27V PRODUCT MANUAL Rev 1 18 5.7 Alarm Connections The alarm connections for all rectifiers, breakers, and fuses are factory pre-wired. The MX28B DC power plant, however, permits the user to program the system alarms in various ways. A Printed Circuit (PC) board designated “0P9133” is moun...
Page 25 - Table 5-1. External Alarm Input Definition; all the other relays energize
Rev 1 MX28B-1200+27V PRODUCT MANUAL 19 5.7.1 External Alarm Inputs Four external alarm inputs with assignable priority levels are availa ble. These alarm inputs respond to external dry contact closures between normally open (NO) and common (C) or contact openings between normally closed (NC) and C (...
Page 26 - MINOR; Connecting The Loads; -3: adapter has 1⁄4” studs on 1” centers for two-hole cable lug
MX28B-1200+27V PRODUCT MANUAL Rev 1 20 ALARM OUTPUT TERMINAL DESIGNATION NO-NC-C USER ALARM NOTES RELAY #1 RELAY #2 RELAY #3 RELAY #4 RELAY #5 RELAY #6 MINOR MAJOR J1 NO1-NC1-C1 NO2-NC2-C2 NO3-NC3-C3 NO4-NC4-C4 J2 NO5-NC5-C5 NO6-NC6-C6 NO7-NC7-C7 NO8-NC8-C8 ________________________ _________________...
Page 27 - Installation of Circuit Breakers; ) Remove the metal circuit breaker cover panels.; when it is turned OFF.; ) Reattach the circuit breaker cover panels.; Figure 5-8 Plug -in Circuit Breaker Insertion
Rev 1 MX28B-1200+27V PRODUCT MANUAL 21 5.8.2 Installation of Circuit Breakers 1) Remove the metal circuit breaker cover panels. 2) Use diagonal cutters to cut the metal web of the breaker panel “knock-outs” at the desired breake r locations. 3) Install the circuit breaker(s) by snapping the top term...
Page 28 - Battery Temperature Probe Installation; OFF
MX28B-1200+27V PRODUCT MANUAL Rev 1 22 5.9 Battery Temperature Probe Installation The optional 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 loca...
Page 29 - STATUS ALARMS SYSTEM MODULES BATT PIN OEM; Figure 5-11 Control Unit Display; for the batteries being used in the system.); Battery Maximum Recharge Rate
Rev 1 MX28B-1200+27V PRODUCT MANUAL 23 5.10.1 Apply AC Power Turn on the circuit breakers that supply AC power to the rectifier shelves in the MX28B DC power plant. Turn on the individual 20 Amp circuit breakers for each rectifier on the shelf. The main screen should appear on the control unit displ...
Page 30 - To complete a full system power up, perform the following steps
MX28B-1200+27V PRODUCT MANUAL Rev 1 24 5.10.3 Full System Power Up To complete a full system power up, perform the following steps 1) Turn OFF all the circuit breakers that supply AC power to the rectifiers in the MX28B DC power plant. 2) Turn on the external circuit breaker from the battery to the ...
Page 31 - the cursor cycling beneath its characters.; Figure 6-1 Navigating the Menu; “¦APC¦”
Rev 1 MX28B-1200+27V PRODUCT MANUAL 25 6 SETUP, ADJUSTMENTS, AND OPERATION 6.1 User Interface The MX28B control unit provides a user interface designed with a hierarchical menu that can be viewed on the 32-character display by “navigating” with the “ ï ” (left), “ ð ” (right), “ ñ ” (up), and “ ò ” ...
Page 32 - External Alarm Inputs
MX28B-1200+27V PRODUCT MANUAL Rev 1 26 The default passwords for level 1 and level 2 are “1111” and “2222”, respectively. There are no alternate passwords or “backdoors” for accessing the system. A forgotten password may require a new master controller board, at customer expense. System control para...
Page 33 - . To find the parameters that can be accessed in this category,
Rev 1 MX28B-1200+27V PRODUCT MANUAL 27 6.5 Parameter Locations, Descriptions, and Default Values The location, description, and factory programmed default value for each of the MX28B system parameters is found in Table 6-1. The table also shows all of the status and information screens with typical ...
Page 34 - Conv Current
MX28B-1200+27V PRODUCT MANUAL Rev 1 28 Figure 6-2. Control Unit Menu Structure MX28B120024V + STATUS Sys Voltage Sys Current Conv Voltage Conv Current Sys Temp Batt Current Batt Temp ALARMS Alarm Item 1 Alarm Item 2 Alarm Item 3 Alarm Item 4 Alarm Item 5 Alarm Item 6 Alarm Item 7 Alarm Item 8 Alarm ...
Page 35 - Hw Batt T Alm
Rev 1 MX28B-1200+27V PRODUCT MANUAL 29 (Figure 6-2. Control Unit Menu Structure) Hw Batt T Alm Hw Sys T Alm Hw LVD1 Alm Hw LVD2 Alm SETUP PIN 1 PIN 2 Address 1 Address 2 Address 3 Model Fahrenheit Cntrl Rev FW Version Display Type DATE Date Time OUT-RLY RLY-MAP Out-Rly 1 Alm Out-Rly 2 Alm Out-Rly 3 ...
Page 38 - ALIAS
MX28B-1200+27V PRODUCT MANUAL Rev 1 32 ALIAS FUSE 1 FUSE 2 FUSE 3 FUSE 4 FUSE 5 FUSE 6 FUSE 7 FUSE 8 FUSE 9 FUSE 10 FUSE 11 FUSE 12 FUSE 13 FUSE 14 FUSE 15 FUSE 16 LVD SET-ALM LVD1 Option LVD1 Open Alm LVD2 Option LVD2 Open Alm PARAM LVD1 Trip LVD1 Reset LVD2 Trip LVD2 Reset BATT SET-ALM Batt Disc T...
Page 39 - OEM C Offset
Rev 1 MX28B-1200+27V PRODUCT MANUAL 33 PIN PIN OEM OEM R Offset OEM R Gain OEM C Offset OEM C Gain OEM S Offset OEM S Gain
Page 41 - PARAMETER; Minor
Rev 1 MX28B-1200+27V PRODUCT MANUAL 35 PARAMETER DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS Display Type [SYSTEM/SETUP] Type number for the control unit display. Display Type + 000255 Da t e / T i m e S e t u p Date {1} [SYSTEM/DATE] Internal system calendar date. Date m+ DEC 16 1999 Time {1} [S...
Page 42 - Batt LV Alm On m
MX28B-1200+27V PRODUCT MANUAL Rev 1 36 Converter Low Voltage {1} [SYSTEM/SET-ALM] Converter voltage is below the low-voltage threshold. Conv LV Alm m+ Minor System High Temperature {1} [SYSTEM/SET-ALM] The control unit temperature is above the high temperature threshold. Sys HT Alm m+ Minor System L...
Page 45 - min
Rev 1 MX28B-1200+27V PRODUCT MANUAL 39 (Table 6-1. Parameter Locations, Descriptions, and Default Values) PARAMETER DESCRIPTION DISPLAY SCREENS / DEFAULT SETTINGS Standby Alarm {1} [MODULES/RECT/SET-ALM] This alarm indicates that the control unit is holding a rectifier in the standby mode. Rect Stdb...
Page 47 - Major; Ignore
Rev 1 MX28B-1200+27V PRODUCT MANUAL 41 Input Relay 4 {1} [SYSTEM/IN-RLY/RLY-MAP] An alarm activated in response to an external contact closure or opening at the Input Relay 4 connection. In-Rly 4 Alm m+ Ignore OUTPUT RELAY SETUP Output Relay 1 Alias {1} [SYSTEM/OUT-RLY/ALIAS] An alternate name (alia...
Page 48 - Enable
MX28B-1200+27V PRODUCT MANUAL Rev 1 42 LVD Alarm LVD1 Option {1} [MODULES/LVD/SET-ALM] Set to “Enable” if the unit has an LVD1. LVD1 Option m+ Enable LVD1 Alarm {1} [MODULES/LVD/SET-ALM] Sets the priority or “mapping” of an LVD1 Alarm. LVD1 Open Alm m+ Minor LVD2 Option {1} [MODULES/LVD/SET-ALM] Set...
