The SeaMAX Software package automatically installs several application samples with source code in the Example Projects subfolder. To access the samples from the Start Menu, click All Programs and locate the Sealevel Systems folder. In the SeaMAX subfolder, click on Documentation, and then click on the Example Projects Folder shortcut. Select your development platform […]
It depends on how the input is wired to your application. An input is triggered when the input terminal and local common terminal of the Sealevel device detects a voltage difference greater than or equal to the input’s turn-on voltage – generally 3 VDC. The inputs are non-polarized so the voltage direction does not […]
The SeaIO software package automatically installs several application samples with source code in the samples subdirectory. To access to the samples, navigate to: [main drive]:Program FilesSeaIOSamples. For a listing and description of the samples, refer to the help file located at: Start > All Programs > SeaIO.
Yes, many of our TTL products can be modified to always power on with an off-state of zero volts (TTL ‘low’). All of our standard TTL adapters are designed for interfacing to industry-standard relay racks that expect an off-state of 5V (TTL’high’). This power on behavior is explained further in the FAQ, Why does […]
Sealevel Digital I/O products with reed relays are not designed to switch inductive loads such as the coil on another relay. If you need to switch an inductive load, Sealevel recommends using a Digital I/O product with Form C relays instead. You should remember to place a diode parallel to the coil to suppress […]
Yes, all Sealevel relay racks allow an external power source to be connected to the V+ and Ground terminals. However, you need to take steps to prevent the external power source from back-feeding current into the Sealevel TTL I/O adapter connected to the relay rack. On single point discrete relay racks, you need to […]
No. Sealevel optically isolated and dry contact inputs are current-mode inputs, which do not require external pull-up (or pull-down) resistors to be added for most applications.1 External pull-up (or pull-down) resistors are generally required on voltage-mode inputs found on cheaper, non-isolated input devices. Voltage mode inputs require pull-up (or pull-down) resistors to hold the […]
Many third-party software packages (and PLCs) include support for the open and well-documented Modbus protocol. Sealevel SeaI/O modules use the Modbus protocol for communication and control. SeaI/O modules with USB, RS-232, or RS-485 interfaces use the Modbus RTU protocol. Ethernet and wireless SeaI/O modules use the Modbus TCP protocol. More information is included in […]
Yes. Supporting documentation is located in the help file when SeaIO software is installed. From the Start menu, locate the SeaIO folder and choose SeaIO Help. In the contents you will find a section titled “Active X Controls” that explains the Properties, Methods and Events for Active X I/O control.
Sealevel SeaI/O devices offer flexible I/O expansion to APC Netbotz remote environmental monitoring equipment. All APC NetBotz appliances that have a USB port support SeaI/O 450U and 462U modules to expand the amount of digital I/O. SeaI/O 450U modules provide 16 Form C relay outputs useful for locking doors, turning lights on or off, and other […]