Alpha Technologies CXDF24482KW User manual

Your Power Solutions Partner
Cordex DC/DC Converter CXDF 24-48/2kW, 24V In - 48V Out
Installation & Operation Manual
Part # 012-526-B2
Eective: 05/2012
member of The Group™

Cordex DC/DC Converter
CXDF 24-28/2kW, 24V In - 48V Out
012-526-B2
The following documents and drawings are included in this manual to provide the necessary information
required for installation, routine operation and fault diagnosis of the unit:
• Specications, Converter and Shelf: 012-526-B1
• Specications, CXCI: 707-492-B1
• Outline Drawing, 23” 5-Module Shelf: 030-900-06
• Customer Connections, 23” 5-Module Shelf: 030-900-08
• Outline Drawing, 19” 4-Module Shelf: 030-905-06
• Customer Connections, 19” 4-Module Shelf: 030-905-08
• Outline Drawing, 19” Shelf, Dual Input: 030-839-06
• Customer Connections, 19” Shelf, Dual Input: 030-839-08

i
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
1. Please read this manual prior to use to become familiar with the product’s numerous features and operating
procedures. To obtain a maximum degree of safety, follow the sequences as outlined.
2. This manual provides warnings and special notes for the user:
a. Points that are vital to the proper operation of the product or the safety of the operator are
indicated by the heading: WARNING.
b. A notation that is in Bold Italic typeface covers points that are important to the performance
or ease of use of the product.
3. Before using the product, read all instructions and cautionary markings on the product and any equipment
connected to the product.
4. Do not expose the product to rain or snow; install only in a clean, dry environment.
5. CAUTION – Unless otherwise noted, use of an attachment not recommended or sold by the product
manufacturer may result in a risk of fire, electric shock, or injury to persons.
6. CAUTION – Do not operate the product if it has received a sharp blow, it has been dropped, or otherwise
damaged in any way – return it to a qualified service center for repair.
7. CAUTION – Do not disassemble the product – call our qualified service centers for servicing. Incorrect
reassembling may result in a risk of electrical shock or fire.

ii
TABLE OF CONTENTS
1INTRODUCTION.............................................................................................................................................................1
1.1 Scope of the Manual.....................................................................................................................................1
1.2 Product Overview..........................................................................................................................................1
1.3 Part Numbers and List Options.....................................................................................................................2
2FEATURES ...................................................................................................................................................................3
2.1 Converter Module..........................................................................................................................................3
2.2 Cordex Integrated System Controller (CXCI) Option....................................................................................4
2.3 System Controller Front Panel......................................................................................................................4
2.4 Analog Input Channels..................................................................................................................................5
2.5 Digital Input Channels...................................................................................................................................6
2.6 Alarm and Control Output Relays.................................................................................................................6
2.7 Network Connection and Remote Communications.....................................................................................6
3INSPECTION..................................................................................................................................................................7
3.1 Packing Materials..........................................................................................................................................7
3.2 Check for Damage........................................................................................................................................7
4INSTALLATION..............................................................................................................................................................8
4.1 Safety Precautions........................................................................................................................................8
4.2 Tools Required..............................................................................................................................................8
4.3 Shelf Preparation/Mounting ..........................................................................................................................8
4.4 Converter Module Insertion/Removal ...........................................................................................................8
4.5 CXCI..............................................................................................................................................................9
5WIRING AND CONNECTIONS ........................................................................................................................................11
5.1 Safety Precautions......................................................................................................................................11
5.2 Calculating Wire Size Requirements ..........................................................................................................11
5.3 Input/Output Connections ...........................................................................................................................11
5.4 CAN Serial Ports.........................................................................................................................................12
5.5 Network Connection and Remote Communications via CXCI....................................................................12
5.6 Signal Wiring Connections for CXCI...........................................................................................................13
6SYSTEM STARTUP ......................................................................................................................................................15
6.1 Check System Connections........................................................................................................................15
6.2 Verify Input and Power the Shelf ................................................................................................................15
6.3 Converter Operation and Programming via the CXC .................................................................................15
6.4 CXC Reset..................................................................................................................................................16
7MAINTENANCE ...........................................................................................................................................................17
7.1Fan Replacement........................................................................................................................................17
7.2 CXCI Replacement Procedure....................................................................................................................18
8WARRANTY................................................................................................................................................................ 19
8.1 Warranty......................................................................................................................................................19
9ACRONYMS AND DEFINITIONS .....................................................................................................................................20

012-526-B2 Rev C Page 1 of 20
1 Introduction
1.1 Scope of the Manual
This instruction manual explains the installation and interconnection of Alpha Technologies’ CXDF 24-48/2kW.
Both the converter modules and the shelves, which the modules are plugged into, are covered in this manual.
NOTE: To aid the user with installation, frequent reference is made to foldout drawings located at the rear of the manual.
1.2 Product Overview
The CXDF 24-48/2kW isolated DC-DC converter employs a high frequency switched mode conversion technique
to provide a fully regulated and isolated -48 Volt DC output from a +24 Volt DC input.
Each module is a stand-alone converter element, which plugs into a common shelf. The shelf provides external
connections for input, output, and alarm interfaces. Additional converter modules can increase the current
capacity and redundancy of the converter system.
Figure 1–Perspective view of CXDF 24-48/2kW converter module
The converter system consists of at least one shelf with one or more modules installed in each shelf. Additional
modules can be added to the shelf at time of ordering or at a later time after the system has been installed.
The shelf converter system is designed to operate with the Alpha Cordex System Controller (CXC).
Controller software version 1.97 is the minimum requirement.
All models of the CXC allow the user to set up, control and monitor the entire power system and ancillary
components from one central, easy-to-use source: your web browser. Other features of the controller include
temperature compensation, auto equalization, remote access, dial out on alarm, battery diagnostics, as well as
web server and SNMP support for configuration and monitoring.
Details of controller operation are provided in the current version software manual.
There are two external CXC models that can communicate with the converter shelf via offset RJ-12 shelf
connectors. The CXCR is mounted in a rack and the CXCP is (factory) mounted in a panel. Each of these models
has a touch screen display, similar to that used in a Personal Digital Assistant (PDA).
See manual #018-587-B2 (pre-RoHS #018-557-B2).
The optional shelf-mounted integrated model (CXCI) does not have a touch screen; therefore, system setup and
management is performed exclusively with the web interface.
Details for installation and wiring are provided in the respective chapters of this documentation package.

012-526-B2 Rev C Page 2 of 20
1.3 Part Numbers and List Options
This product is available to order under the following part numbers and list options:
Description Part Number/List Option
Cordex DC/DC 2kW converter, 24V In – 48V Out.....................................................................................012-526-20
Basic module......................................................................................................................................................*List 0
Charcoal finish with white (contrasting) silkscreen..........................................................................................*List 56
Cordex DC/DC 2kW converter, 24V In – 48V Out, 23” (flush mounting) 2RU shelf..................................030-900-20
[may be equipped with one CXCI controller and up to five CXDF 24-48/2kW converters] ..........................*List 0
23” rack, 6” offset mounting...............................................................................................................................List 24
Charcoal finish with white (contrasting) silkscreen..........................................................................................*List 56
Module blank plate.............................................................................................................................................List 90
CXCI blank plate..............................................................................................................................................*List 91
Rear cover, Kydex..............................................................................................................................................List 92
CXCI controller...................................................................................................................................................List 99
Cordex DC/DC 2kW converter, 24V In – 48V Out, 19” (flush mounting) 2RU shelf..................................030-905-20
[may be equipped with one CXCI controller and up to four CXDF 24-48/2kW converters]..........................*List 0
19” rack, 6” offset mounting ...............................................................................................................................List 19
23” rack, 6” offset mounting...............................................................................................................................List 24
Charcoal finish with white (contrasting) silkscreen..........................................................................................*List 56
Module blank plate.............................................................................................................................................List 90
CXCI blank plate..............................................................................................................................................*List 91
Rear cover, Kydex..............................................................................................................................................List 92
CXCI controller...................................................................................................................................................List 99
Cordex DC/DC 2kW converter, 24V In – 48V Out, 19” (flush mounting) 2RU shelf..................................030-839-20
[may be equipped with one CXCI controller and up to four CXDF 24-48/2kW converters]..........................*List 0
19” rack, 6” offset mounting...............................................................................................................................List 19
23” rack, 6” offset mounting...............................................................................................................................List 24
Charcoal finish with white (contrasting) silkscreen..........................................................................................*List 56
Output adapters (DC cable), right angle............................................................................................................List 82
Module blank plate.............................................................................................................................................List 90
CXCI blank plate..............................................................................................................................................*List 91
Rear cover, Kydex..............................................................................................................................................List 92
CXCI controller...................................................................................................................................................List 99
Output adapters (DC cable) kit, right angle, CXDF 19” shelf.....................................................................058-245-20
Rear cover kit, CXDF 19” shelf, Kydex......................................................................................................747-587-20
Replacement CXDF fan assembly.............................................................................................................747-362-20
Replacement CXCI controller.....................................................................................................................747-502-20
CXCI I/O terminal block kit (for external connections)............................................................................**036-201-20
Cordex DC Modem (complete with Alpha cable).......................................................................................018-585-20
* Default option
** See drawings at the rear of this manual.
The above information is valid at the time of publication. Consult factory for up-to-date ordering information.

012-526-B2 Rev C Page 3 of 20
2 Features
2.1 Converter Module
The Cordex converter modules plug into the Cordex converter shelf. The modules can be installed or removed
from a system without disturbing the system provided sufficient current capacity remains. This is often referred to
as “Hot Swap.”
The total output current capacity of the converter system is equal to the sum of the individual current capacities of
the converter modules.
2.1.1 Alarms
Converter Module Fail alarms consist of a group of (major) alarm conditions that are considered “serious” or an
immediate threat to service:
•Converter failure
•Output fuse failure
•Converter off
•Thermal shutdown
•Input Voltage is out of range
•Output OVP level has been exceeded.
Converter Minor alarms consist of a group of alarm conditions that are not an immediate threat to service:
•Fan fail
•Current limit.
2.1.2 Indicators
LED indicators are provided on the front panel of the converter module to display the operational status of the
module (see Table A).
Indicator Color
Associated Condition
Green (I/P)
DC INPUT OK
Green (O/P)
Converter Module Power ON
Red (FAIL)
Converter Module FAIL
Red (FAIL flashing)
Converter Minor Alarm
Table A–Module indicators and conditions
2.1.3 Regulation and Paralleling
Cordex modular converters use “output slope” or “regulation offset” to accomplish load sharing. When the
converters are run in parallel (as is the case when more than one converter module is installed in the shelf) it is
necessary to adjust (via the CXC: software version 1.97 minimum) the output voltage of the individual converter
modules such that the output current is shared equally between the individual modules. At that point, the modules
will track each other and share the load over the output current range of the units. The output slope value is fixed
at 1.0% (1V / full current range).
2.1.4 Reverse Polarity Protection
The converter design has incorporated reverse polarity protection from the connection to a battery on the input
and to a power source on the output. This prevents damage to the converter circuitry if a reverse connection is
made.

012-526-B2 Rev C Page 4 of 20
2.2 Cordex Integrated System Controller (CXCI) Option
The CXCI option is mounted in the converter system shelf and brings advanced monitoring technology to the
Cordex series of converters. This compact system controller is designed for seamless operation and set up of
Alpha power systems and is equipped with the complete range of Cordex software (version 1.97 minimum)
features, including the following:
•Designed to communicate directly with Cordex converters
•Provides local and remote communications
•User definable alarms
•Daily logging of system events and statistics.
Behind the CXCI’s front panel lies the main controller motherboard, which contains a microprocessor, memory, as
well as numerous other electronic components.
The CXCI includes a web server providing easy set up and monitoring using an Internet connection with the
standard Windows® Internet Explorer browser.
The data logging feature allows the user to capture data from multiple inputs, for AC/DC voltages, load/battery
current, cell voltages & temperatures (automatically for up to 16 user defined logs). Typical applications of the
CXCI logging include power system details, thermal performance of outdoor enclosures, battery cell specifics, or
mains variations captured by an AC voltage watchdog.
A built-in audio speaker sounds an intermittent tone during active alarms.
The input/output (I/O) board houses a series of terminal connections; located at the rear of the system shelf via a
D-sub connector.
NOTE: Customer settings for the CXCI will be provided separately in the system documentation package.
2.3 System Controller Front Panel
Figure 2–Cordex CXCI model system controller front panel
(Photo is for reference only – subject to installation requirements)
2.3.1 Display
The CXCI has a 4-digit display for monitoring system voltage (V) and current (A). A pushbutton toggle switch
allows the user to alternate the display reading.
Hard reset
(push once)
Soft reset
(push once)
[Hold for 3 seconds
to reset IP address]
Ethernet port
LCD screen (V/A)
Display pushbutton
toggle switch (V/A)
Port for Alpha DC
modem (e/w cable)
onl
y
System status
LEDs
Details of controller operation
are provided in the current
version software manual
(
version 1.97 minimum).

012-526-B2 Rev C Page 5 of 20
2.3.2 LEDs
The CXC has three LEDs located on the front panel. These are used to display the alarm status of the power
system, CXC progress and status during startup, and file transfers.
2.3.2.1 Alarm Conditions
The CXCI illuminates the LED that corresponds to the system alarm status. The following show
the corresponding alarm status for each LED color:
Green – OK, no alarms present
Yellow – Minor alarm is present (no major alarms)
Red – Major alarm is present.
Only one LED is illuminated at a time during alarm conditions.
2.3.2.2 Progress and Status Indication
The LEDs are also used in the following situations:
Base unit validation – all three LEDs are on at the same time.
File transfer – when recovering from invalid firmware application – the red LED is illuminated.
2.3.3 Reset
A reset button is located on the front panel for restarting the CXCI’s microprocessor.
NOTE: Refer also to the software manual – always select the Reset menu item before pressing the reset button.
2.3.4 Modem Port
The Modem port is designed for CXCI connection to Alpha Technologies’ Cordex DC Modem #018-585-20.
CAUTION
Do not connect anything other than the Alpha modem and Alpha-supplied DB-9 cable to the
D-sub port on the front of the CXCI.
2.3.5 Ethernet Port
The Ethernet port is designed for CXCI connection to a user supplied network (TCP/IP secured by user) via a
front panel RJ-45 jack (Figure 2) and a standard network cable.
Local access (e.g. laptop computer) is also possible from the Ethernet port connection using a standard network
crossover cable.
2.4 Analog Input Channels
2.4.1 Voltage Inputs
Two voltage input channels, V1 and V2, provide monitoring of discharge and charge voltage. The CXCI software
is pre-configured to monitor V2 for load and for battery voltage. V2 is used as the system reference for rectifier
float voltage, low voltage disconnect (LVD), system high voltage alarm, and system low voltage alarm. V1 is
available for additional voltage measurements.
2.4.2 Current Input
The CXCI software is pre-configured to monitor I1 for load current using an external 100A/50mV current shunt in
the negative lead.
2.4.3 Temperature Inputs
Two temperature input channels, T1 and T2, provide monitoring of battery temperature and temperature
compensation (temp comp) or room/ambient temperature. A voltage is supplied to these terminals to power the
temperature sensors.

012-526-B2 Rev C Page 6 of 20
2.5 Digital Input Channels
The CXCI can accommodate up to two (2) channels and can monitor digital alarm/control signals from converters
(software version 1.97 minimum), rectifiers, and many other types of equipment.
2.6 Alarm and Control Output Relays
The CXCI contains four (4) Form C digital alarm output relays to extend alarms and control external apparatus.
Each internally generated alarm or control signal may be mapped to any one of the relays, or, several signals may
be mapped to just one relay or none at all.
2.7 Network Connection and Remote Communications
The Cordex system can be set up, monitored and tested via Ethernet 10/100 Base-T serial data connection. The
communication protocol supports a web interface. All alarming and control of Cordex converters is accomplished
with a CXC via a CAN bus.
Controller software version 1.97 is the minimum requirement.
A step-by-step connection wizard – provided to establish remote communications with your CXC – is available via
the Alpha website (www.alpha.ca).

012-526-B2 Rev C Page 7 of 20
3 Inspection
3.1 Packing Materials
All Alpha products are shipped in rugged, double walled boxes and suspended via solid inserts to minimize shock
that may occur during transportation. Packaging assemblies and methods are tested to International Safe Transit
Association standards.
Products are also packaged with Cortex. This plastic wrap contains a corrosive-inhibitor that protects the product
from corrosion for up to two years.
3.1.1 Returns for Service
Save the original shipping container. If the product needs to be returned for service, it should be packaged in its
original shipping container. If the original container is unavailable, make sure the product is packed with at least
three inches of shock-absorbing material to prevent shipping damage.
NOTE: Alpha Technologies is not responsible for damage caused by the improper packaging of returned products.
3.2 Check for Damage
Prior to unpacking the product, note any damage to the shipping container. Unpack the product and inspect the
exterior for damage. If any damage is observed contact the carrier immediately.
Continue the inspection for any internal damage. In the unlikely event of internal damage, please inform the
carrier and contact Alpha Technologies for advice on the impact of any damage.
Verify that you have all the necessary parts per your order for proper assembly.

012-526-B2 Rev C Page 8 of 20
4 Installation
This chapter is provided for qualified personnel to install the product, which shall be mounted in a clean and dry
environment.
NOTE: To aid the user with installation, frequent reference is made to drawings located at the rear of the manual.
4.1 Safety Precautions
WARNING
Hazardous voltages are present at the input of converter/rectifier systems. The DC output, from
the converters/rectifiers and the battery system, has a high short circuit current capacity that may
cause severe burns and electrical arcing.
Before working with any live battery or power system/distribution center, follow these precautions:
•Remove all metallic jewelry; e.g., watches, rings, metal rimmed glasses, necklaces.
•Wear safety glasses with side shields (and prescription lenses if necessary) at all times during installation.
The installer should follow all applicable local rules and regulations for electrical and battery installations; e.g.,
CSA, UL, CEC, NEC, OSHA, and local fire codes.
Use OSHA approved insulated hand tools.
4.2 Tools Required
Various insulated tools are essential for product installation. Use this list as a guide:
•Philips head screwdriver, #2 (tip size 1/4”)
•Slot head screwdriver (1/4” x #6)
•Slot head screwdriver (blade size 0.09” x 0.02”) or “tweaker”
•Digital voltmeter equipped with test leads
•Cutters and wire strippers
•Crimping tool (optional for large gauge wire)
•Socket and ratchet set (Imperial measure).
4.3 Shelf Preparation/Mounting
For 030-900-20, the shelf has been designed for flush mounting in a 23” relay rack.
For 030-905-20 and 030-839-20, the shelves have been designed for flush mounting in a 19” relay rack.
Each shelf has an option for 6” offset mounting. See outline drawings at the rear of this manual.
NOTE: The shelf shall be mounted in a clean and dry environment. Allow at least 1.75” of free space in front of and
behind the unit for unrestricted cooling airflow.
Mounting brackets accommodate either 1” or 1-3/4” rack spacing. The shelf should be mounted to the rack using
at least two #12 – 24 x 1/2” screws in each bracket. Philips-type screws and screwdriver should be used to
eliminate the possibility of slippage and scratching of the unit’s exterior. Washers (such as internal tooth) or
special screws that are designed to cut through the painted surface should be used to ensure a good chassis
ground.
4.4 Converter Module Insertion/Removal
Insert by placing the converter module on the shelf bottom and sliding the module into the rear connector (inside
of the shelf). Apply pressure on the module handle to engage the rear connector in the shelf receptacle.
NOTE: It is recommended that the first converter module be inserted into the front leftmost position using the side of the
shelf-mounted controller as a guide. The next module may be inserted using the previous module as a guide.
Tighten the thumbscrew (1/4-turn) latch on the bottom of the faceplate to secure the module to the shelf.
NOTE: Do not force a module into position if it does not seat properly. All modules are keyed to ensure that the correct
module (polarity/voltage) type is used.

012-526-B2 Rev C Page 9 of 20
To remove a converter module, loosen the thumbscrew (1/4-turn) latch on the bottom of the faceplate. Grasp
handle and pull out, sliding the module away from the rear connector and out of the shelf.
4.5 CXCI
Refer to Maintenance chapter for CXCI Replacement Procedure.
4.5.1 CXCI Blank Plate Removal
Remove converter in the left-most position in order to access the side of the CXCI where the mounting screws are
located.
Figure 3–Showing CXCI blank plate removal
4.5.2 CXCI Module Installation
Remove CXCI blank plate as described previously.
Remove baffle (via front-mounting screw) if you have not already done so.
Figure 4–Baffle and pem removal
CXCI blank plate
Baffle
Side-mounting screw (2PL) –
remove to release CXCI blank plate
Front -mounting screw –
remove to release baffle
Remove pem before
installation of CXCI
Remove front-mounting
screw to release baffle
Baffle and
pem removed

012-526-B2 Rev C Page 10 of 20
Figure 5–Showing CXCI module preparation
Figure 6–Showing CXCI module installation
Remove two (2) side mounting screws to release the CXCI front panel Gently remove LCD
Install front
mounting screw to
secure body of
CXCI module
Install by placing
the CXCI module
on the shelf bottom
and sliding the
module into the rear
connector (inside of
the shelf)
Apply pressure on
the module baffle
plate to engage the
rear connector in
the shelf receptacle
Install two (2) side
mounting screws to
secure the CXCI
front panel
Use minimal
pressure to re
-
install the LCD
Ensure LCD is
straight and aligned
parallel to the front
panel window when
reattaching the
CXCI front panel

012-526-B2 Rev C Page 11 of 20
5 Wiring and Connections
This chapter provides cabling details and notes on cable sizing for DC applications.
NOTE: Refer also to foldout drawings located at the rear of the manual.
5.1 Safety Precautions
WARNING
Ensure that power is removed by turning off rectifiers (if equipped) and removing the battery line
fuse circuit breaker or connection before attempting work on the converter wiring connections.
For safety reasons, ensure the Cordex shelf is properly bonded to the building’s ground grid.
NOTE: The input and output DC connections should be grounded appropriately to the central office ground.
It is recommended, for ease of service, that each converter shelf should have a dedicated input feeder protection
circuit breaker or fuse.
Refer to the previous (Installation) chapter for additional safety precautions.
5.2 Calculating Wire Size Requirements
Wire size is calculated by first determining the appropriate maximum voltage drop requirement. Using the formula
below calculate the CMA wire size requirement. Determine the size and number of conductors required to satisfy
the CMA requirement.
CMA = (A x LF x K) / AVD, where:
CMA = Cross section of wire in circular mil area
A = Ultimate drain in amps
LF = Conductor loop feet
K = 11.1 constant factor for commercial (TW type) copper wire
AVD = Allowable voltage drop
Check again that the ampacity rating of the cable meets the requirement for the installation application. Consult
local electrical codes (NEC, CEC, etc.) for guidelines. If required, increase the size of the cable to meet the code.
5.3 Input/Output Connections
WARNING
Ensure that the converter feeder breaker is turned “OFF” before attempting to work on the output
cable assembly. When the shelf is connected to another operating converter or battery, the output
leads must be suitably taped to prevent contact with the converter shelf or each other.
Secure all connections to the shelf terminals of the correct polarity; e.g., +Vcable to +Vpost.
Minimum wire sizes and recommended feeder fuse / circuit breaker sizes are given in the specifications section at
the front of this manual.
DC output wire shall be UL approved XHHW or RHH/RHW (for Canadian users, RW90 Type). Control and sense
wires shall be UL approved Style 1015 (for Canadian users, TEW type).
Ensure the washers are on the bolts in the same order in which they were shipped from the factory.
5.3.1 Cable
Terminate cable leads with appropriate crimp lugs.
5.3.2 Bus Bar
Bus bar adapters may be factory-installed, for the option selected, to easily accommodate direct connections to
customers’ vertical bus bars.

012-526-B2 Rev C Page 12 of 20
5.4 CAN Serial Ports
Two CAN Serial ports (modular jacks with offset latches) are provided for communications with Alpha’ Cordex
rectifiers and other CAN-enabled equipment. These are located on the right side of the shelf (as viewed from the
front).
Daisy-chain (CAN OUT of one shelf to CAN IN of another) as necessary and ensure that only the last shelf is
terminated. See drawing 030-900-08.
5.4.1 CAN Termination
A jumper (or switch depending on your configuration) allows setting of the CAN OUT to be open (to the next shelf
in the system) or terminated. Termination must be enabled in final shelf on the CAN bus only. Access termination
selection (inside the shelf) by removing the converter closest to the CAN ports.
5.5 Network Connection and Remote Communications via CXCI
The Cordex system can be set up, monitored and tested via Ethernet 10/100 Base-T serial data connection. The
communication protocol supports a web interface. Some standard scenarios are described below:
5.5.1 Modem Port
The Modem port is designed for CXCI connection to the Alpha Technologies’ Cordex DC Modem (#018-585-20)
via a front panel DB-9 connector.
Connect to the CXCI from the modem with the Alpha-supplied DB-9 cable.
CAUTION
Connect only Alpha-supplied modem and cable; otherwise, equipment damage can result.
5.5.2 Ethernet Port for Network Connection (Standard Network Cable)
The Ethernet port is designed for CXCI connection to a user supplied network (TCP/IP secured by user) via a
front panel RJ-45 jack.
Connect to the Cordex shelf using a standard network cable. Pinouts are shown in drawing 030-900-08.
5.5.3 Ethernet Port for Local Connection (Crossover Cable)
Local access (e.g., laptop computer) is also possible from the Ethernet port connection.
Connect using a standard network crossover cable.

012-526-B2 Rev C Page 13 of 20
5.6 Signal Wiring Connections for CXCI
NOTE: To aid the user with installation, frequent reference is made to drawings located at the rear of this manual.
Custom configurations may be detailed within the Alpha power system documentation package.
For terminal block connections, the recommended wire sizes are 0.14 to 0.75mm2(#26 to #18 AWG) for the
temperature range of 0 to 50 deg. C (as per UL/CSA).
CAUTION: to reduce risk of fire, use only 0.14mm2(#26 AWG) or larger wire.
5.6.1 Alarm (Relay) Outputs
Terminals provide contacts for extending various alarm or control signals. Each relay output can be wired for NO
or NC operation during an alarm or control condition. See Figure 7.
Figure 7–Showing relay connections
Relays can be programmed to energize or de-energize during an alarm condition (see CXC Software manual).
When the CXCI reset button is pressed or power is lost, all relays de-energize.
5.6.2 Digital Inputs for CXCI
The digital input channels (factory-installed) are used to monitor various alarm and control signals. All input
channels are voltage activated and accept a bipolar (i.e. negative or positive) DC signal directly.
5.6.2.1 Connection Method
Typical Alpha systems use the “reset with Hot and trigger with Ground” connection. The digital
input is wired in such a way that the Hot is wired directly into one of the input terminals; e.g.,
negative input for -48V systems. The other input terminal is wired to the Ground (common) of
the system through a relay (dry contact – usually located on the equipment requiring
monitoring). This method (see Figure 8) allows the digital input to receive (or not receive) a
Ground signal on an alarm.
Figure 8–Showing digital input connection method

012-526-B2 Rev C Page 14 of 20
5.6.2.2 Programming the Digital Input
The digital input channels can be programmed for “active high” or “active low.” Active high
indicates “alarm on the presence of a ground signal” and active low indicates “alarm on the
removal of a ground signal.” See CXC Software manual for detailed instruction on
programming.
Voltage Range (VDC)
Voltage Level (VDC)
Considered As “0” (Off)
Voltage Level (VDC)
Considered As “1” (On)
0—60
(system voltage setting)
0—3 9—60
Table B–Voltage level definitions for digital inputs
5.6.3 Analog Inputs for CXCI
CAUTION: Ensure the correct polarity is used for all input cable terminations.
The analog input channels are used to monitor various types of electrical signals.
5.6.3.1 Voltage
Voltage Input #1 (load voltage per CXC software) terminals (V1) on the shelf provide
connections to an optional secondary voltage input.
Voltage Input #2 (battery voltage per CXC software) is wired internally (V2) to the output voltage
of the shelf. This is used as the reference for system alarming (such as high voltage) and
control (such as LVD).
5.6.3.2 Temperature Sensor
Temperature Probe input channels (T1 and T2) provide connections for up to two temperature
sensors. A voltage is supplied to these terminals for sensor measurements.
5.6.3.3 Current
Current Input #1 (load current per CXC software) is wired externally to a system current shunt
(100A/50mV) in the negative lead.