Alpha Technologies Cordex User manual

Your Power Solutions Partner
Cordex PSU, 24V/400W or 48V/650W
Web Enabled, DIN Rail/Wall Mount Power Supply
Installation & Operation Manual
Part # 0100011-J0
Effective: 09/2013
member of The Group™

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.

i
TABLE OF CONTENTS
1INTRODUCTION ............................................................................................................................................................. 1
1.1 Product Overview.......................................................................................................................................... 1
1.2 Specifications ................................................................................................................................................ 2
2FEATURES ................................................................................................................................................................... 3
2.1 Cordex Integrated System Controller (CXCI+) ............................................................................................. 3
2.2 Analog Input Channels.................................................................................................................................. 4
2.3 Digital Input Channels ................................................................................................................................... 4
2.4 Alarm and Control Output Relays ................................................................................................................. 4
2.5 Network Connection and Remote Communications ..................................................................................... 4
2.6 Rectifiers ....................................................................................................................................................... 5
2.7 True Module Fail Alarm................................................................................................................................. 6
2.8 Heat Dissipation ............................................................................................................................................ 6
2.9 Over Temperature Protection ....................................................................................................................... 6
2.10 Wide AC Range ............................................................................................................................................ 6
2.11 AC Inrush/Transient Suppression ................................................................................................................. 6
2.12 Soft Start ....................................................................................................................................................... 6
2.13 Current Limit/Short Circuit Protection ........................................................................................................... 6
2.14 High Voltage Shutdown (HVSD) ................................................................................................................... 7
2.15 Battery Eliminator Operation......................................................................................................................... 7
2.16 CAN bus........................................................................................................................................................ 7
3INSPECTION.................................................................................................................................................................. 8
3.1 Packing Materials.......................................................................................................................................... 8
3.2 Check for Damage ........................................................................................................................................ 8
4INSTALLATION .............................................................................................................................................................. 9
4.1 Safety Precautions ........................................................................................................................................ 9
4.2 PSU Preparation/Mounting ........................................................................................................................... 9
5WIRING AND CONNECTIONS ........................................................................................................................................ 11
5.1 Tools Required............................................................................................................................................ 11
5.2 Power System Chassis Ground and DC Ground Reference ...................................................................... 11
5.3 AC Feeder Protection/Sizing....................................................................................................................... 11
5.4 AC Input ...................................................................................................................................................... 11
5.5 Wiring Schematic ........................................................................................................................................ 12
5.6 Calculating Output Wire Size Requirements............................................................................................... 12
5.7 DC Output ................................................................................................................................................... 12
5.8 Network Connection and Remote Communications via CXCI+.................................................................. 13
5.9 Signal Wiring Connections .......................................................................................................................... 13
6OPERATION................................................................................................................................................................ 17
6.1 Main Rectifier States ................................................................................................................................... 17
6.2 Main Rectifier Modes .................................................................................................................................. 18
6.3 400W Rectifier Factory Ranges and Defaults............................................................................................. 19
6.4 650W Rectifier Factory Ranges and Defaults............................................................................................. 19
7SYSTEM STARTUP ...................................................................................................................................................... 20
7.1 CXC Reset .................................................................................................................................................. 20
8MAINTENANCE ........................................................................................................................................................... 22

ii
8.1 MOV Replacement...................................................................................................................................... 22
9WARRANTY AND SERVICE INFORMATION..................................................................................................................... 24
9.1 Technical Support ....................................................................................................................................... 24
9.2 Warranty...................................................................................................................................................... 24
9.3 Battery Warranty ......................................................................................................................................... 24
9.4 Return of Material........................................................................................................................................ 24
10 ACRONYMS AND DEFINITIONS ..................................................................................................................................... 25

0100011-J0 Rev D Page 1 of 25
1 Introduction
1.1 Product Overview
•Clean and reliable DC power supply for critical loads available in two options: 24V/400W or 48V/650W
•Internet ready and remotely accessible for complete and cost effective system and site monitoring
•Advanced battery charging, monitoring and testing to ensure sufficient reserve power availability and
prolonged battery life
•Configurable platform with I/Os for site monitoring, user-definable alarms, data logging and control
•Extended temperature range for installation in harsh outdoor environments
•Wide AC input operating range for worldwide installation requirements
Figure 1– Cordex PSU, 24V/400W or 48V/650W shelf system with integrated CXCI+ controller
Rectifier module
(650W shown)
CXCI+ controller

0100011-J0 Rev D Page 2 of 25
1.2 Specifications
The product is available under the following part numbers:
•24V-400W model, DIN Rail mount: #0100011-002
•48V-650W model, DIN Rail mount: #0100012-002
Electrical
>48V/650W
>24V/400W
Input voltage:
Operating:
120/208/240Vac
120/208/240Vac
Extended:
Low: 90 to 120Vac (de-rated power)
Input frequency:
45 to 65Hz
45 to 65Hz
Current:
5.0A max
4.9A max
Power:
650W max
400W max
Power factor:
>0.99%
>0.99%
THD:
<5%
<5%
Efficiency:
>90%
>88%
Output voltage:
42 to 58Vdc
20 to 30Vdc (24V Nominal)
Output current:
13.5A max
14A max
Load regulation:
Static <±0.5%
Static <±0.5%
Dynamic <±2% for 50 to 100% load step
Dynamic <±5% for 50 to 100% load step
2ms recovery time
2ms recovery time
Load regulation:
Static <±0.1%
Static <±0.1%
Dynamic ±1% for any change within rated
Dynamic ±1% for any change within rated
Noise:
Voice band:
<32dBrnC
<32dBrnC
Wide band:
<10mV RMS (to 10MHz)
<10mV RMS (to 10MHz)
<150mV pk to pk (to 100MHz)
<100mV pk to pk (to 100MHz)
Psophometric:.
<1mV RMS
<1mV RMS
Mechanical
Dimensions (HxWxD):
117mm x 281mm x 101mm (4.6in x 11.1in x 3.98in)
Weight:
3kg (6.6lbs)
Mounting:
Panel
DIN rail (standard TS-35/7.5 or 15 Mounting Rail)
Connections:
AC, Load & Battery:
Screw terminal 4mm2(#12AWG)
Alarms & I/Os:
Screw terminals 2.5mm2to (#14AWG)
Environmental
Temperature:
Operation:
- 40 to 50˚C (-40 to 122˚F)
Extended:
51 to 70˚C (123 to 158˚F)
Storage:
- 40 to 85˚C (-40 to 185˚F)
Humidity
0 to 95% RH non-condensing
Altitude:
-500 to 3000m (-1640 to 9840ft)
Heat Dissipation:
<110 BTU per hour
Other
MTBF: 369,000 hrs @30°C ambient; test model Telecordia SR-332, Issue 2
Agency Compliance
Safety:
CSA C22.2 No 60950-1-07 (2nd Ed) / UL 60950-1 (2nd Ed) cCSAus Marked
IEC 60950-1:2005 (2nd Ed) / EN60950-1:2006 CE Marked
EMC:
ETSI 300 386-2
Emissions:
CFR47 (FCC) Part 15 - Class A Device
EN 61000-3-2
EN 61000-3-3
Immunity:
EN 61000-4-2, EN 61000-4-3
EN 61000-4-4, EN 61000-4-5
EN 61000-4-6, EN 61000-4-11
ANSI / IEEE C62.41 CatB3
The above information is valid at the time of publication. Consult factory for up-to-date ordering information.

0100011-J0 Rev D Page 3 of 25
2 Features
Alpha’s Cordex PSU is an integrated, fully-featured DC power system in a compact form factor. It is designed to
provide power to critical loads while enabling remote site monitoring and delivering critical information on demand.
The PSU supplies reliable and low output ripple current along with short circuit, over voltage, over temperature
and over load protection. It also features advanced battery charging, monitoring and testing functionality. Two
temperature, two digital and one analog inputs can be used for monitoring system alarms such as intrusion
detection or equipment malfunction.
2.1 Cordex Integrated System Controller (CXCI+)
The integrated CXCI+ controller offers comprehensive local and remote control and monitoring, including a web
server, providing easy set up using a standard Windows Internet Explorer browser. SMTP features “enable alarm”
condition settings and multiple automatic notification options by e-mail to a computer, server or smartphone.
Sites without internet access can use the integrated CXCI+ controller as an advanced standalone data logging
system, allowing the capture of data from multiple inputs such as AC/DC voltages, load/battery current, and cell
voltage/temperature.
The CXCI+ captures and retains 90 days of statistical data and 500 alarm events, ready for download to a laptop
for site history file and analysis of system performance, power system details, thermal performance of outdoor
enclosures and failure conditions.
NOTE: Customer settings for the CXCI+ are provided in a separate software manual:included in the PSU documentation
package.
Figure 2 Cordex CXCI+ controller front panel
2.1.1 Front panel user interface
Display:
4-digit display for monitoring system voltage (V) and current (A). A pushbutton switch
toggles the display.
GUI:
Embedded web based GUI accessed via Ethernet using internet browser
LEDs:
Alarm indication:
•AC mains OK — Green
•Minor alarm — Yellow
•Major alarm — Red
Progress and Status Indication:
•Self-test: LEDs all on at the same time
•File transfer: red LED on when recovering from invalid firmware application
Ethernet port
Display pushbutton
toggle switch (V/A)
Soft reset
(push once)
[Hold for 3 seconds
to reset IP address]
System status
LEDs
LCD screen (V/A)
Hard reset (push
once)

0100011-J0 Rev D Page 4 of 25
Audio speaker:
Sounds an intermittent tone during active alarms
Reset:
Soft reset button: push once to reset controller; push hold for 3 sec to reset IP address
Hard reset button: use to reset controller when controller is hung up and not responding
Ethernet Port (RJ-
45 jack)
10/100 Base-T for TCIP/SNMP/Email features (standard network cable)
Local access, e.g., laptop computer (crossover cable)
2.2 Analog Input Channels
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 battery voltage.
V2 is used as the system reference for rectifier float voltage, low voltage disconnect (B),
system high voltage alarm, and system low voltage alarm. V1 is available for additional
voltage measurements.
Current Inputs:
The CXCI+ software is pre-configured to monitor I1 for load current wired internally to the
system current shunt.
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.
2.3 Digital Input Channels
The CXCI+ can accommodate up to two channels and can monitor digital alarm/control signals from sensors such
as a door alarm and other types of site monitoring equipment.
2.4 Alarm and Control Output Relays
The CXCI+ contains four Form C digital alarm output relays to extend alarms and control external apparatus.
Each internally generated alarm or control signal can be mapped to any one of relays K2-K4, or, several signals
can be mapped to just one relay or none at all. Relay K1 is mapped to the LVBD (see Section 5.9.4 on page 16).
2.5 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.

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2.6 Rectifiers
Figure 3–Rectifier front panel (400W shown)
2.6.1 Front Panel LEDs
The front panel LEDs provide rectifier status summary and help to locate a specific module under CXC control.
OK
The top LED (green) is on when AC is within a valid range and the rectifier is
delivering power to the load.
The LED turns off when AC has failed or when the rectifier is off; for example,
when commanded by the CXC controller. AC voltage is invalid if the AC Mains
Low or AC Mains High alarm is active.
ALM (Alarm)
The bottom LED (red) is on continuously in the event of an active Module Fail
alarm.
The LED flashes (~2Hz) when a minor alarm is detected.The LED remains off
in the absence of an alarm.
Locate Module
command from CXC
LEDs flash in a distinct pattern that makes it easy to identify the rectifier
visually among adjacent rectifiers.
Firmware upload in
progress
The LEDs flash in the same pattern as the “locate module” command
described above.
2.6.2 Mechanical
A thumbscrew is provided to secure the rectifier into the PSU. During normal operation lock the rectifier into
position. A handle (or grip) is incorporated into the front panel to facilitate the removal of the rectifier from the unit.
No special tools are required.

0100011-J0 Rev D Page 6 of 25
2.7 True Module Fail Alarm
The power module has a “true” fail alarm, which provides a true indication of the power module’s ability to source
current. When the module’s output current drops below 2.5% of the rated output a low output current condition is
detected and the Module Fail detection circuit is activated. This circuit momentarily ramps up the output voltage to
determine if the module will source current. If no increase in current is detected, the Module Fail alarm is
activated. The module will test once every 60 seconds for the condition until current is detected. Output voltage
ramping will cease upon detection of current1. A minimum 2.5% load is required to avoid the Ramp Test Fail
alarm; this can typically be provided with the parallel system battery. Activation of this alarm could indicate a failed
module or a failed load.
NOTE: For Cordex rectifier systems without batteries (or with a very light load; below 2.5% of rated output) it is
recommended that the ramp test be disabled to avoid nuisance alarms. The Ramp Test feature is
enabled/disabled via the CXC menu item: Rectifiers > Configure Settings.
2.8 Heat Dissipation
Heat dissipation is achieved through natural (bottom to top) convection cooling.
2.9 Over Temperature Protection
Each PSU is protected in the event of an excessive increase in temperature due to component failure or cooling
airflow blockage. During over temperature conditions, the rectifier limits the output power as well as the output
current. If temperature continues to increase, a shutdown of the rectifier is initiated. The rectifier restarts
automatically once the temperature returns to a safe level.
2.10 Wide AC Range
A minor alarm is generated when the AC input voltage drops below specification. The unit will deliver derated
output power down to 90Vac.
For voltages above 240Vac, power factor and total harmonic distortion may be derated.
2.11 AC Inrush/Transient Suppression
The inrush current of the rectifier module is limited to the full load steady state line current to prevent surge on the
AC line. Modules are also protected from input lightning and transient surges in accordance with IEEE/ANSI
C62.41 Category B3.
2.12 Soft Start
To eliminate an instantaneous demand on the AC source, a soft start feature is employed. Soft Start, sometimes
referred to as “current walk-in”, works by gradually (up to five seconds) ramping the current limit up from zero to
the actual or defined customer setting. The rectifier output voltage is ramped up from the minimum voltage to the
float voltage.
2.13 Current Limit/Short Circuit Protection
The current limit function determines the maximum output current limit of the rectifier module, regardless of output
voltage or power. Maximum output current is limited to a constant value down to short circuit condition. Current
limiting can be used to mate the rectifier output current ampacity to the needs of the load and parallel battery to
minimize excessive battery recharge current.
The rectifier will sustain a short circuit at the output terminals indefinitely. The maximum short circuit current shall
not exceed 105% of the rated full load current.
1Under normal conditions, a battery connected to the output of the rectifier will draw current when the voltage ramp occurs. Therefore the rectifier fail
alarm will not be generated with a battery connected.

0100011-J0 Rev D Page 7 of 25
2.14 High Voltage Shutdown (HVSD)
This feature provides protection to the load from over voltage conditions originating from the rectifier. It operates
by shutting down the rectifier module when a high output voltage condition occurs. Indication is through the red
Alarm (Module Fail) LED. The module will restart automatically; however, if more than three over voltage
conditions occur in one minute, the module will latch off and remain shut down until it is reset.
2.15 Battery Eliminator Operation
The PSU maintains all specifications (except where indicated) with or without a battery attached in parallel to the
output; however, if a battery is not present, there will be no monitoring or control activity if there is an AC power
failure or input fuse failure.
2.16 CAN bus
All alarming and control of Cordex rectifiers is communicated to/from the CXC via a CAN bus.

0100011-J0 Rev D Page 8 of 25
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.
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.

0100011-J0 Rev D Page 9 of 25
4 Installation
This chapter is provided for qualified installation personnel.
NOTE: Mount in a clean and dry environment
4.1 Safety Precautions
WARNING
Hazardous voltages are present at the input of power systems. The DC output from the rectifiers
and battery system, though not dangerous in voltage, 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.
•Use OSHA approved insulated hand tools.
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.
4.2 PSU Preparation/Mounting
CAUTION: The PSU requires at least 2" of space around the unit to meet cooling requirements.
4.2.1 DIN rail Mounting Option
•Standard TS-35/7.5 or 15 mounting rail
Figure 4–DIN rail mounting option

0100011-J0 Rev D Page 10 of 25
4.2.2 Panel/Wallmount Option
Figure 5-Panel/Wallmount Option
The Cordex PSU can be mounted to surfaces such as wood (at least 3/4" thick), metal or concrete with #10 (M5)
fastening hardware that is appropriate for the chosen surface.
1. Remove the 2 DIN rail mounting clips (3x screws per clip shown in Figure 4).
2. Mount horizontally on a vertical surface using appropriate #10 (M5) fastening hardware in the 4 locations
shown in Figure 5.
Front view
Rear view

0100011-J0 Rev D Page 11 of 25
5 Wiring and Connections
WARNING
Hazardous AC voltages may be present. Ensure power at the AC service panel is off before
attempting work on the AC connections. Use a voltmeter to verify the absence of voltage. Clearly
mark the correct polarity of the battery leads before commencing work on DC connections.
5.1 Tools Required
Use this list as a guide:
•Slot head screwdrivers (blade sizes: 1/4", 1/8", 1/16")
•Philips head screwdriver, #2 (tip size 3/16")
•Digital voltmeter equipped with test leads
•Adjustable 24/48Vdc load (optional)
•Cutters and wire strippers
•Crimping tool (optional for large gauge wire)
•Socket and rachet set (Imperial measure)
•Anti-static wrist strap
•Computer (laptop) with MicrosoftInternet Explorer
•Crossover cable RJ-45 (for access using the Ethernet port).
5.2 Power System Chassis Ground and DC Ground Reference
WARNING
For safety reasons, ensure the system is properly bonded to the building’s ground grid.
Both the shelf chassis ground (via power system chassis ground) and common return shall be connected to the
site ground to ensure correct operation of the system and to prevent drifting floating analog (especially current)
readings.
5.3 AC Feeder Protection/Sizing
It is recommended to use a dedicated protection feeder breaker located at the AC distribution panel. The feeder
breaker can also act as the disconnect device for the connected module.
Circuit Breaker
Exact Value to Use
90 deg. C Wire Gauge
to use at 30 deg. C ambient
15A
2.50mm² (#14 AWG)
Table A–Recommended AC supply configuration
5.4 AC Input
CAUTION: AC input wires should be routed in flexible or rigid conduit as far away as possible
from the DC power wires to minimize EMI disturbances.

0100011-J0 Rev D Page 12 of 25
5.5 Wiring Schematic
Figure 6 – Wiring Connections
5.6 Calculating Output 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.
5.7 DC Output
WARNING
Leave cables disconnected at battery and verify output polarity using a voltmeter. Make final
connections at the battery only after all other wiring is completed.
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).
5.7.1 Load
Secure the positive and negative cable leads to the output terminal blocks of the correct polarity—see Figure 6.
The common output leg of the rectifier should be connected to ground. This is typically done at the load common
termination point (negative bus bar for +24V systems).
Replace rear cover once all connections have been completed.
LINE
NEUTRAL
GROUND
LOAD-
LOAD+
BATTERY-
BATTERY+
K2 NO
K2 COM
K2 NC
K3 NO
K3 COM
K3 NC
K4 NO
K1
K4 COM
K4 NC
N/A
T1-
T1+
T2-
T2+
V1-
V1+
D1
TIED TO COMM
D2
TIED TO COMM
CAN

0100011-J0 Rev D Page 13 of 25
5.8 Network Connection and Remote Communications via CXCI+
The Cordex system can be set up, monitored and tested using the CXCI+ front panel RJ-45 jack, which provides
an Ethernet 10/100 Base-T serial connection to:
•A user supplied network (TCP/IP secured by user) for remote access
•Local access to a laptop computer
5.9 Signal Wiring Connections
Refer to Figure 6 for the location of the terminal block.
For terminal block connections, the recommended wire sizes are 1.5 to 0.14mm² (#16 to #26 AWG) for the
temperature range of 0 to 50 deg. C (as per UL/CSA). Control and sense wires shall be UL approved Style 1015
(for Canadian users, TEW type).
CAUTION: to reduce risk of fire, use only 0.14mm² (#26 AWG) or larger wire.
Description
Default Name
Signal Type
Range
LVBD Control (internal)
K1, Relay 1
NO/COM/NC
60Vdc / 1A
Alarm Output 2
K2, Relay 2
NO/COM/NC
60Vdc / 1A
Alarm Output 3
K3, Relay 3
NO/COM/NC
60Vdc / 1A
Alarm Output 4
K4, Relay 4
NO/COM/NC
60Vdc / 1A
Digital Input 1 (internal)
D1, Digital 1
Pos (+) or Neg (-)
0—60Vdc
Digital Input 2
D2, Digital 2
Pos (+) or Neg (-)
0—60Vdc
Voltage Input 1
V1, Load Voltage
Pos (+) / Neg (-)
0—60Vdc
Voltage Input 2 (internal)
V2, Load and Battery Voltage
Pos (+) / Neg (-)
0—60Vdc
Temp Probe 1
T1, Analog Input T1
Pos (+) / Neg (-)
0—20Vdc
Temp Probe 2
T2, Analog Input T2
Pos (+) / Neg (-)
0—20Vdc
Table B–Signal wiring connections for PSU
* NO and NC Form C contacts available. Can be configured to de-energize on alarm (DOA) or energize on alarm (EOA).
** See Table C for definitions of logic and system.
*** Voltage (Input) is 0—60VDC, Temp Probe is 0—20VDC with power source.
NOTE: The signal cables should be bundled together and tie-wrapped.
5.9.1 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.
5.9.1.1 Voltage
Voltage Input #1 (load voltage per CXC software) terminals on the shelf provide connections to
an optional secondary voltage input. For example, this can be terminated to the load side of an
LVD contactor to monitor load voltage.
Voltage Input #2 (battery voltage per CXC software) is wired internally to the rectifier output
voltage of the shelf. This input is used as the reference for system alarming (such as high
voltage) and control (such as LVD).
5.9.1.2 Temperature Sensor
Temperature Probe input channels provide connections for up to two temperature sensors. A
voltage is supplied to these terminals for sensor measurements. Connect the red lead to “+” and
the black lead to “-“.

0100011-J0 Rev D Page 14 of 25
5.9.1.3 Current
Current Input #1 (load current per CXC software) is wired internally to the system current shunt
(75A/50mV) in the negative lead.
5.9.2 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.
D1 is wired internally for CB/fuse trip. D2 is available for customer connections as required.
5.9.2.1 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.,
positive input for +24V 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 7) allows the digital input to receive (or not receive) a
Ground signal on an alarm.
Figure 7–Showing digital input connection method
5.9.2.2 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 the 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 C–Voltage level definitions for digital inputs