Buy Modems, HART Modems and Wireless Connectivity Devices
Find modems, HART protocol modems, wireless bridge devices, LTE/GNSS radio modems, PoE adapters and related connectivity products at Selectum LLC. This category includes industrial modems and connectivity products used for industrial communication, field device connection, wireless network links, remote control and network power support. Products may support HART communication, RS-232, RS-485, USB, USB-C, Modbus registers, LTE/GNSS radio communication, point-to-point wireless bridging or Power-over-Ethernet connections. Products are available from brands such as Microflex, EnGenius, IFM, Monnit and B+B SmartWorx. Explore the catalog to find a modem or connectivity device that matches your interface, protocol, power and installation requirements.
Applications and Uses for Modems and Wireless Connectivity Devices
Modems and related connectivity devices are used to connect, manage or extend communication between industrial equipment, field instruments, network devices and remote systems. HART protocol modems can support communication with compatible HART field devices, while a point to point wireless bridge can help create wireless network links between locations. LTE/GNSS radio modems, wireless control devices, wireless sensor adapters and PoE adapters may support remote monitoring, industrial communication, network power delivery or equipment integration. Each item should be selected according to the required protocol, interface, frequency, power input, network type and device compatibility. For the field instruments these devices connect to, Selectum also carries temperature sensors and related process instrumentation.
Products in this category
This category offers a focused selection of modem and connectivity products for different communication needs:
- HART protocol modems with USB, USB-C, RS-232, RS-485 and OEM module options
- HART modem models with Modbus accumulator or Modbus register support on selected products
- Capacitor-coupled and transformer-coupled HART modem modules for OEM integration
- Point to point wireless bridge units and wireless bridge kits for compatible network links
- LTE/GNSS radio modems for selected CAN or Ethernet communication applications
- PoE and gigabit Power-over-Ethernet adapters for compatible network devices
- Wireless control and wireless sensor adapter products for supported remote monitoring or control setups
- Industrial digital input node options for compatible industrial communication systems
- Products from Microflex, EnGenius, IFM, Monnit, B+B SmartWorx and other available manufacturers
Interfaces, protocols and compatibility
Performance depends on the communication protocol, interface type, power requirements, wireless standard, operating environment and connected equipment. HART modem models should be matched to the required interface, such as USB, USB-C, RS-232 or RS-485, and to the software or field device being used. Wireless bridge and radio modem products should be checked for frequency, link type, supported network standard, power method and installation requirements. PoE adapters should be matched to the required voltage, PoE standard and connected device power needs. Always review the product specifications before ordering to confirm compatibility.
Specifications and selection guide
Choosing the right modem or connectivity device starts with the communication task. Confirm whether you need a HART protocol modem, a point-to-point wireless bridge, an LTE/GNSS radio modem, a PoE adapter, a wireless control device or another interface product. Then check the required protocol, interface, frequency, voltage, power input, network speed, connector type, mounting method and compatible equipment. Since this category includes several different types of connectivity products, filtering by brand, protocol, interface and application can help narrow the selection.
Complete your setup
Pair the device with compatible cables, power supplies, antennas, PoE devices, network switches, field instruments, software tools or mounting hardware, confirming the interface, power requirements and supported equipment before combining components. For copper-to-fiber network links alongside these products, Selectum also stocks media converters.
Why shop Modems at Selectum LLC
Selectum carries HART protocol modems, wireless bridges, LTE/GNSS radio modems, PoE adapters and wireless control devices from five industrial and networking brands, including the Microflex MicroLink and InLink HART modem lines in USB, USB-C, RS-232 and RS-485 versions. Product pages show interface, protocol and power details with listed pricing and free shipping on qualifying items, so you can match a device to your existing equipment before ordering.
Frequently Asked Questions
How do I choose the right HART modem?
Start by checking the required interface for your computer, control system or field device. HART modems may use USB, USB-C, RS-232, RS-485 or OEM module formats, and some models include Modbus-related features. Match the modem to your HART device, software, interface requirements and installation method before ordering.
What is the difference between a HART modem and a point-to-point wireless bridge?
A HART modem is used for communication with compatible HART field devices, while a point-to-point wireless bridge is used to create a wireless network link between two locations. They serve different purposes, so the correct product depends on whether you need field instrument communication or network connectivity.
When do I need an RS-232, RS-485, USB or USB-C modem interface?
The correct interface depends on the equipment you are connecting to. USB or USB-C models are often used with computers or modern service tools, while RS-232 and RS-485 interfaces may be required for certain industrial systems, controllers or legacy communication setups. Check the equipment documentation before selecting the modem interface.
Do I need a PoE adapter with a wireless bridge or network device?
A PoE adapter may be needed when a compatible network device receives both power and data through an Ethernet cable. Before ordering, check the voltage, PoE standard such as 802.3af or 802.3at, power output and device requirements. Not every wireless bridge or network device uses the same PoE adapter.
What should I check before buying an LTE/GNSS radio modem?
Before buying an LTE/GNSS radio modem, check the supported communication type, interface, antenna requirements, power input, network compatibility and whether the device is designed for CAN, Ethernet or another system. Compatibility with your existing equipment is more important than the general modem category name.