American Dynamics KT-400 SPI Expansion Port, Example of current draw calculation

Page 28

SPI Expansion Port

The SPI (Serial Peripheral Interface) expansion port on the KT-400 is used to connect expansion modules, in order to add more inputs and outputs such as relays. The maximum current draw for the SPI expansion port is 500 mA when the 12V AUX terminals are not used. The 6-pin SPI cable must be connected to the SPI IN of the first module. See Figure 9 and Figure 11 for examples of interconnection between the KT-400 and expansion modules.

Figure 9: KT-400 Interconnection Examples with Expansion Modules

The number of expansion modules that can be connected to the KT-400 SPI expansion port, without an additional external power supply, can vary depending how much current is drawn from all the modules in the SPI chain.

Check the following table to calculate the SPI chain current draw:

Expansion Module

Qty of modules x Maximum current draw

Total

 

 

Current

 

 

 

 

 

 

KT-MOD-REL8

_______ x 330 mA

______ mA

 

 

 

KT-MOD-INP16

_______ x 40 mA

______ mA

 

 

 

KT-MOD-OUT16

_______ x 750 mA

______ mA

 

 

 

Maximum current draw from KT-400 SPI expansion port when the 12 VDC AUX terminals are not used.

- 500 mA

 

 

If the total current is between 0 mA and 1850 mA (1.85 Amps), 1 external power supply is required.

 

If the total current is between 1851 mA and 3700 mA (3.70 Amps), 2 external power supply are required.

 

 

 

 

Example of current draw calculation:

1.15 modules (KT-MOD-OUT16) x 750 mA = 11250 mA

2.11250 mA - 500 mA (or 0 mA if the 12 VDC AUX of the KT-400 is used) = 10750 mA

3.10750 mA divided by 1850 mA = 5.8 which means in fact 6 external power supplies 12 VDC, 2 Amps are required.

4.Connect an external power supply at every expansion module where the current draw has reached 1.85 Amps.

5.Make sure the power jumper on the modules is in the correct position when using external power supply(ies).

24

DN1726-0811

Page 27 Page 29
Image 28
Page 27 Page 29
Contents KT-400 Page Table of Contents Installation Checklist Inputs and Outputs Assignments Sheet Pre-Installation Information Technical Support Compliance Specifications FCC & IC Compliance UL ComplianceUL 294 Compliance Notice UL 1076 Compliance NoticeDN1726-0811 Multiple Configuration Options OverviewInputs Trouble and Reporting KT-400 Ethernet Four-Door Controller PCB View KT-400 KT-400 Cabinet Model for North America System Architecture DN1726-0811 Over the internet with a KT-NCC and EntraPass Global Edition Vital LED Heartbeat Patterns Vital LED Heartbeat PatternsTechnical Specifications Type DescriptionElectrical Specifications TypicalExpansion Modules Models Related DocumentationPart number Description Dimensions DrawingsMiscellaneous Items Models Information DN1762, FigureInstalling the KT-400 Ethernet Four-Door Controller Earth Grounding AWG #18 grounding wire to EgndConnect readers and keypads Reader Connection Terminal WarningTamper Protection Install tamper switch on cabinet Relay Controlled OutputsConnecting the KT-400 Ethernet Four-Door Controller BluePowering the KT-400 Ethernet Four-Door Controller Connecting over Corporate Network LANSPI Expansion Port Example of current draw calculationImportant Installation Rules about Expansion Modules KT-MOD-CAB Dimensions Drawing in DWG FormatPCB View of Expansion Modules Expansion Modules WithEthernet Four Expansion Modules Cabinet for North America Troubleshooting Soft ResetDefault initialization KT-400 Factory Default StepsBi-annual test for battery Annual test for emergency lithium ion batteryOptional Documentation Make sure the KT-400 is in Factory Default Dhcp mode. See on Important The KT-Finder application isVerify your Network Configuration Information Sheet KT-400 Ethernet Four-Door Controller EntraPass Site KT-400 Ethernet Four-Door Controller SiteInstallation Checklist Installing the KT-400 Ethernet Four-Door ControllerInputs and Outputs Assignments Sheet No or NC EOL, DRY or DeolKT-400 Cabinet Inner Door Sticker Diagram North America DN1726-0811

KT-400 specifications

The American Dynamics KT-400 is a robust and versatile video management system designed for a wide range of security applications. As a part of American Dynamics' extensive lineup of surveillance solutions, the KT-400 caters to various industries, including retail, transportation, and critical infrastructure, enabling efficient surveillance and management of video data.

One of the main features of the KT-400 is its exceptional scalability. The system can support a large number of cameras, making it suitable for both small and expansive enterprises. Users can easily manage thousands of video feeds, enabling effective monitoring of large facilities or multiple locations from a centralized interface. This scalability is complemented by its user-friendly web-based interface, which allows operators to access the system remotely, providing flexibility and convenience.

In terms of technology, the KT-400 employs advanced video analytics capabilities. These analytics enhance security measures by allowing the system to detect unusual activities, such as unauthorized access or suspicious behavior, reducing reliance on manual monitoring. The analytics can send instant alerts, which can significantly improve response time during security incidents. Integration with other security systems, such as access control and intrusion detection systems, further enhances its effectiveness.

The KT-400 is designed for high-performance video recording, featuring high-resolution recording capabilities that ensure clear and detailed footage, crucial for identification purposes. The system also supports various compression standards, optimizing storage use while maintaining video quality. Coupled with its redundancy features, such as failover capabilities, the KT-400 ensures that critical video data is preserved even in the event of hardware failures.

Moreover, the KT-400 supports a wide range of camera types, including IP and analog cameras, making it a versatile choice for existing legacy systems as well as new installations. This compatibility, along with support for various video formats, allows for seamless integration, providing users with the flexibility to design their surveillance systems according to their needs.

In conclusion, the American Dynamics KT-400 stands out for its scalability, advanced video analytics, high-performance recording, and broad compatibility with different camera types. These features make it an ideal choice for organizations looking to enhance their security management and respond swiftly to potential threats. With ongoing technological advancements, the KT-400 is poised to remain a reliable choice in the evolving security landscape.
Top Page Image Contents