LN-9900 Intelligent Poultry Environmental Controller

LN-9900 Intelligent Environmental Control for Large Poultry Houses

The LN-9900 is designed to coordinate the main environmental control equipment used in a modern commercial poultry house. Instead of operating fans, air inlets, heaters, cooling equipment and alarms as separate systems, the controller brings the available sensor signals and control outputs into one operating interface.

Its 10-inch touchscreen displays current environmental information, equipment status and alarm records. Farm operators can use the interface to review environmental conditions, adjust control settings and check abnormal events without moving between several independent control panels.

The system is particularly suitable for poultry projects that require multiple ventilation stages, several fan groups, motorized air inlets and a wider range of environmental sensors.

Multi-Sensor Environmental Monitoring

The LN-9900 can collect environmental and equipment signals required for poultry-house climate management. Depending on the selected modules and project configuration, the system supports:

• up to 16 temperature sensors;
• humidity monitoring;
• CO2 monitoring;
• NH3 monitoring;
• negative-pressure monitoring;
• wind-speed monitoring;
• air-inlet position feedback;
• water-counter signals;
• feeding-level sensor signals;
• external alarm inputs.

The host controller provides connections for four temperature sensors. A temperature extension module adds connections for another 12 temperature sensors and additional analog environmental inputs.

These inputs allow the controller to receive information from different areas of the poultry house and coordinate the connected ventilation, heating, cooling and alarm equipment. The sensor types and quantities should be confirmed according to the poultry-house layout, control strategy and required monitoring points.

Variable-Speed and Staged Fan Control

Ventilation control is one of the main functions of the LN-9900. The controller can manage:

• four variable-speed fan outputs;
• 0-100% stepless fan-speed regulation;
• up to 40 fixed-speed fan groups;
• up to 40 intelligent ventilation stages.

Variable-speed operation allows compatible fans to run according to the required ventilation output instead of operating only at full speed. Fixed-speed fan groups can then be activated in stages as airflow demand increases. This combined control structure is suitable for poultry houses that require minimum ventilation, transitional ventilation and higher-output ventilation under different operating conditions.

The actual fan sequence, number of groups and speed-control method must be configured according to the installed fan motors, electrical panels and farm ventilation design.

Air-Inlet and Curtain Coordination

The LN-9900 can coordinate up to 12 air inlets or curtain groups. Relay outputs can be used for open-and-close inlet control, while an analog output extension module provides eight analog outputs that can be used for 0-10V inlet control.

The system also supports air-inlet feedback signals. This allows inlet position information to be included in the environmental control process when compatible actuators and feedback devices are installed. Coordinating fan operation with air-inlet position helps the poultry-house control system manage airflow direction and negative pressure as one process rather than as unrelated equipment operations.

For broader management principles, farm planners can review our environmental control guide for layer chicken farming.

Heating, Cooling and Auxiliary Equipment Control

The LN-9900 provides control capacity for multiple pieces of poultry-house environmental equipment. According to the current product configuration, the controller can manage:

• up to six heating groups;
• up to three cooling pumps;
• one fogging system;
• one circulation fan group;
• one timer relay;
• feeder control;
• lighting control;
• light-brightness control;
• local alarm equipment.

The four host analog outputs can be used for compatible variable-speed fans, light-brightness regulation and 0-10V heating control. Relay outputs can be assigned to fans, inlets, heaters, cooling pumps, fogging equipment, timers, feeders, circulation fans, lighting and alarms.

The connected equipment must match the controller output type and the project electrical design. External contactors, frequency converters or control panels may be required according to equipment power and control method.

Alarm Display and Operating Records

The touchscreen displays alarm information and stores alarm records for later review. The system can receive environmental alarms, external alarm signals and equipment-related inputs according to the installed sensors and wiring configuration. This gives operators a central location for reviewing abnormal conditions within the environmental control system.

Alarm thresholds, alarm logic and notification methods should be configured according to the farm's operating requirements. The current product information supports PC and smartphone communication, but the available network method and remote functions must be confirmed for each selected configuration.

Modular Controller Architecture

The LN-9900 uses a modular structure so that the input and output capacity can be selected according to the poultry-house control requirements. The system architecture includes a host controller, relay extension modules, one analog output module and one temperature extension module. The final module combination should be selected according to the number of sensors, fans, air inlets, heaters, cooling equipment and auxiliary devices required by the project.

Host Controller

The host controller is the main touchscreen and control unit. It provides:

• four temperature-sensor connections;
• six analog input channels;
• six digital input channels;
• four analog output channels;
• 15 relay outputs.

The analog inputs can receive signals such as CO2, NH3, negative pressure, wind speed and air-inlet feedback. The digital inputs can be used for signals such as water counters, feeding-level sensors and external alarms.

Relay Extension Module

The controller supports between one and eight relay extension modules. Each relay extension module provides:

• eight additional relay outputs;
• four analog input channels for inlet feedback.

The additional relay outputs can be allocated to fan groups, air inlets, heaters, cooling pumps, fogging equipment, timers, feeders, circulation fans, lighting or alarms according to the project design.

Analog Output Module

One analog output module provides eight analog output channels with 0-10V control for compatible air-inlet systems. The module is intended for applications requiring proportional rather than simple open-and-close control.

Temperature Extension Module

One temperature extension module provides 12 additional temperature-sensor connections and six additional analog input channels. The analog channels can receive humidity, CO2, NH3, negative-pressure and wind-speed signals according to the selected sensors.

Technical I/O Configuration

Module	Quantity	Inputs and Outputs	Supported Functions
Host Controller	1 set	4 temperature sensor inputs	Temperature monitoring
Host Controller	1 set	6 analog input channels	CO2, NH3, negative pressure, wind speed and inlet feedback
Host Controller	1 set	6 digital input channels	Water counter, feeding-level sensor and external alarm input
Host Controller	1 set	4 analog output channels	Variable-speed fans, light-brightness control and 0-10V heating control
Host Controller	1 set	15 relay outputs	Alarm, fan groups, air inlets, heaters, cooling pumps, fogger, timer, feeder, circulation fan and lighting
Relay Extension Module	1-8 pieces	8 relay outputs per module	Additional fans, inlets, heaters, pumps, fogger, timer, feeder, circulation fan, lighting and alarm control
Relay Extension Module	1-8 pieces	4 analog input channels per module	Air-inlet position feedback
Analog Output Module	1 piece	8 analog output channels	0-10V air-inlet control
Temperature Extension Module	1 piece	12 temperature sensor inputs	Additional temperature monitoring points
Temperature Extension Module	1 piece	6 analog input channels	Humidity, CO2, NH3, negative pressure and wind-speed sensors

Main Control Capacity

Item	Capacity
Touchscreen	10 inches
Temperature sensors	Up to 16
Humidity input	Supported
CO2 input	Supported
NH3 input	Supported
Negative-pressure input	Supported
Wind-speed input	Supported
Variable-speed fan outputs	Up to 4
Fixed-speed fan groups	Up to 40
Intelligent ventilation stages	Up to 40
Air inlets or curtains	Up to 12
Heating groups	Up to 6
Cooling pumps	Up to 3
Fogging system	1
Timer relay	1
Light-brightness control	1
Circulation fan group	1
System update	USB flash drive
Communication	PC and smartphone communication

Touchscreen Operation and System Communication

The 10-inch touchscreen is designed to provide a clear operating interface for environmental monitoring and equipment management. The current product functions include:

• environmental data display;
• equipment operating-status display;
• alarm information display;
• alarm record review;
• user-friendly touchscreen management;
• system updates through a USB flash drive;
• communication with PC and smartphone interfaces.

The exact communication hardware, network connection and remote access method should be confirmed before ordering because these functions may depend on the selected project configuration.

Application in a Commercial Broiler Project

The LN-9900 has been used as the environmental control component in a Thailand broiler farm automation project. In that project, the controller was integrated with 50-inch butterfly cone negative-pressure fans and an intelligent poultry weighing system.

The controller collected environmental signals and coordinated staged ventilation operation according to the selected farm settings. The project illustrates how the LN-9900 can form part of an integrated poultry-farm automation system rather than operating as an isolated control panel.

Information Required for Controller Configuration

Before preparing an LN-9900 controller configuration, the buyer should provide:

• poultry-house length, width and internal layout;
• number and type of ventilation fans;
• number of variable-speed and fixed-speed fan groups;
• number and control method of air inlets or curtains;
• required temperature-sensor quantity;
• required humidity, CO2, NH3, negative-pressure and wind-speed sensors;
• heating and cooling equipment quantities;
• local voltage and electrical requirements;
• required alarm inputs;
• communication and remote-access requirements;
• required interface language;
• existing electrical drawings or control sequence, when available.

Providing this information allows the input, output and expansion modules to be matched to the actual poultry-house control system.

Frequently Asked Questions

How many temperature sensors can the LN-9900 support?

The host controller supports four temperature sensors. With the temperature extension module, the system can support another 12 temperature sensors, giving a total capacity of up to 16 temperature monitoring points.

Can the LN-9900 control both variable-speed and fixed-speed fans?

Yes. The controller supports up to four variable-speed fan outputs with 0-100% stepless regulation and can manage up to 40 fixed-speed fan groups through staged control.

How many air inlets can the controller manage?

The LN-9900 can coordinate up to 12 air inlets or curtain groups. Relay outputs can be used for open-and-close operation, while an analog output module can provide 0-10V proportional inlet control.

Does the controller support CO2 and ammonia sensors?

Yes. Analog inputs are available for CO2, NH3, humidity, negative pressure, wind speed and inlet-feedback signals. The selected sensors and signal types must be confirmed during project configuration.

Can the LN-9900 control heating and cooling equipment?

Yes. The current configuration supports up to six heating groups, three cooling pumps, one fogging system and one circulation fan group. The actual connection method depends on the equipment power and electrical control design.

Can the controller record alarms?

Yes. Alarm information can be displayed and recorded through the touchscreen interface. Alarm inputs and notification methods should be configured according to the selected equipment and project requirements.

Can the system be updated?

The current product information states that system updates can be completed through a USB flash drive.

Does the controller support remote access?

The current product information lists PC and smartphone communication. The required network hardware, communication method and available remote functions should be confirmed before ordering.

Are all expansion modules included as standard?

The host controller forms the main control unit. Relay, analog-output and temperature extension modules should be selected according to the required sensors, outputs and equipment quantities.

What information is required before ordering?

The buyer should provide the poultry-house dimensions, fan quantities, air-inlet configuration, required sensors, heating and cooling equipment, local voltage, electrical drawings and communication requirements.

See our selection guide from compact controllers to large integrated systems.