Part 1. Product Introduction

The CX series offers outstanding features in this class. In addition to sophisticated PWM charge regulation with integrated temperature compensation, the CX controllers provide substantial display, programming, and safety functions. The battery state of charge is clearly displayed by means of a bar graph, as well as energy flow from and to the battery and the load status (e.g. overload, load short circuit). 

 

The deep discharge protection function can be set to five different modes: two voltage-controlled, two SOC-controlled,

Part 2. Product feature

>>Built-in 1 year data logger for system analysis

>>LC display

 >>Display indicates charge and discharge status, storage battery soc, load conditions

 >>Load disconnect prewarning by acoustic signal 

 >>Load status indication

 >>Choose among five load disconnect algorithms

 >>Four-stage PWM charging algorithm with integrated temperature compensation 

 >>Protected terminals (up to 16 mm2 wire size)

 >>Full electronic protection 

 >>Programmable nightlight function

Part 3. Protection function

>>Overvoltage protection: 

Battery voltage controlled, battery charge controlled, adaptive controlled. Five over discharge protection operation mode can be free setup of the three control modes.

>>Overvoltage protection: 15.5 V for 12V system, 31V for 24V system, 62V for 48V system

>>Undervoltage protection: 10.5 V for 12V system, 21V for 24V system, 42V for 48V system

>>Over curent protection

>>Short-circuit protection

>>Reverse polarity protection

>>Overtemperature protection

Part 4. Parameter Table

Model	CXN10	CXN20	CXN40
System voltage	12/24 V auto recognition
Max. charge/load current	10A	20A	40A
Float charge	13.7/27.4 V (25 °C)
Main charge	14.4/28.8 V (25 °C), 30 min. (daily)
Boost charge	14.4/28.8 V (25 °C), 2 h Activation: battery voltage < 12.3/24.6 V
Equalization	14.8/29.6 V (25 °C), 2 h, Activation: battery voltage < 12.1/24.2 V
Deep discharge protection: State-of-charge dependent Voltage dependent:   Adaptive: Reconnect level:	A: 11.4 – 11.9 V / 22.8 – 23.8 V B: 11.0 – 11.75 V / 22.0 – 23.5 V A: 11.0/22 V B: 11.5/23 V 11.0 – 12.2 V / 22.0 – 24.4 V 12.8/25.6 V
Overvoltage protection	15.5/31.0 V
Undervoltage protection	10.5/21.0 V
Max. panel voltage (Overvoltage protection by varistor)	30 V in 12 V system 50 V in 24 V system
Temperature compensation (Charge voltage)	−25 mV/K at 12 V −50 mV/K at 24 V
Own consumption	< 6 mA
Grounding	Negative grounding
Ambient temperature	−40 to +50 °C (−20 °C: LC display)
Max. height	4,000 m above sea level
Battery type	Lead acid (GEL, AGM, flooded)
Max wire cross section	Up to 16 mm²
Min wire cross section	2mm²	4mm²	10mm²
Weight	168 g		179 g
Dimensions (W x H x D)	93 x 92 x 38 mm
Type of protection	IP22

Part 5. Product Applying drawing:

Part 6. Product Drawing:

Part 7. Function Description

1. Display function:

In normal operation mode of the controller displays the state of charge(avaiable energy) fo the battery. Any charne of the state of the charge (SOC) to a low status is addtionally signalled acoustically.

System conditions are displayed as follows: The percentage corresponds to the available energy until Low Voltage Disconnect in relation to a fully charged battery. In normal operation the loads can be switched on and off by pushing the button.

This is the indicaed in the display: 2. Low Voltage Disconnect Function

The controller has 5 different modes to protect the battery from being deep discharged.

Mode 1: Disconnect at 11.4V (at nominal load current ) up to 11.9V  (at no load current). Normal operation mode for good battery protection

Mode 2: Disconnect at 11.0V (at nominal load current ) up to 11.75V  (at no load current). Mode with power disconnection point. Battery is cycled deeper, this can shorten battery lifetime.

Mode 3: Disconnect at 11.0V up to 12.2V depending on load current and previous charging cycles. This adaptive mode leads to longer lifetime of the battery, because it allows recovery of the battery by full recharge.Maximum battery lifetime.

Mode 4: Disconnect at11.5V fixed setting. Appropriate if passby loads draw current directly from battery.

Mode 5: Disconnect at 11.0V fised setting. Mode with lower disconnection point.

3. Datalogger

The CX cntroller provides a built-in datalogger. The datalogger gathers 1 year performance data of your PV system, includes the Max. and Min. battery voltage, battery state of charge, max. charging current and max. load current, etc. System performance can be easily analyzed with these historical data, thus helping you to know your PV system better.