030-803-J0 Rev B
Page 8 of 26
3.1.2
LEDs
The CXCM4 has three LEDs located on the front panel. These are used to display the alarm status of the power
system, CXCM4 progress and status during startup, file transfers and lamp tests.
3.1.2.1
Alarm Conditions
The CXCM4 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.
3.1.2.2
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.
Lamp Test
– all three LEDs flash on and off at the same time for 2 seconds.
3.1.3
Reset
A reset button is located on the front panel for restarting the CXCM4’s microprocessor. It takes approximately 15
seconds before the display reappears after pressing the reset button.
NOTE: Refer also to the software manual – always select the shutdown menu item before pressing the reset button.
3.1.4
Ethernet Port
The Ethernet port is designed for CXCM4 connection to a user supplied network (TCP/IP secured by user) via a
front panel RJ-45 jack 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.
3.1.5
RS-232 Serial (Craft) Port
Local access to the CXCM4 is possible through a front panel RS-232 serial port; using a null modem cable. The
communication protocol supports a web interface (via Microsoft® Internet Explorer 6 or greater). The remote
screen display is an enhanced version of the CXC’s front panel display.
3.2
Analog Input Channels
The CXCM4 has analog input channels for voltage, current, and temperature. See Section 6.10.3.
3.2.1
Voltage Inputs
Two voltage input channels, V1 and V2, provide monitoring of discharge and charge voltage. The CXCM4
software is pre-configured to monitor V1 for load voltage and V2 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.
3.2.2
Current Inputs
The CXCM4 software is pre-configured to monitor I1 for load current using an external 50mV current shunt.
