The Momentum Serial Tophat has an RS-485 port.
JOPLIN MO COMPANY EARTHNET PLUS
It can be a data concentrator, Ethernet gateway or MUX, Modbus Plus gateway or MUX, Ethernet NIM, Ethernet protocol converter, or serial protocol converter. Devices on any port can access devices on any other port. The Modbus Plus / Ethernet Bridge has a 10BaseT Ethernet port, a redundant-cable Modbus Plus port and two RS-422/485 serial ports. Use as a bridge, gateway, protocol converter, or data concentrator. It can be used in a SY/MAX rack or stand-alone with Niobrara's NRK2 single-slot rack. It supports 20 serial modes and three Ethernet modes. The Ethernet Port Expander has a 10BaseT Ethernet port and four RS-422/485 serial ports. Implement you own protocols or use an existing application for 3964(R), Caterpillar EMCP Genset, Caterpillar 3500 Engines, DNP 3.0, Dupline I/O, Allen-Bradley DF1, Elliott Flow Computer, ENRON/Daniel Modbus, Cutler-Hammer INCOM, GE Multilin 169 Plus, Johnson Controls N2 (Metasys), Mitsubishi UPS, Siemens SEAbus and SEAbus+, or Simpson Hawk meters. This Compact Universal Communications Module is user-programmable with two switch-selectable RS-232/RS-485 serial ports. Several application layer protocols have been implemented on Ethernet including Modbus/TCP, HTML/HTTP, SNMP (client or server), Cutler-Hammer INCOM, SMTP, Chat, Telnet, and FTP. It can be used as a bridge, gateway, or data concentrator. This Compact Universal Communications Module is user-programmable with a 10BaseT Ethernet port and two switch-selectable RS-232/RS-485 serial ports. Program the PLC from either serial port, add Modbus serial ports for your RTU application or use it as a protocol converter or data concentrator. This Compact Serial Network Option module for the Compact has two switch-selectable RS-232/RS-485 serial ports. It can also act as a bridge, protocol converter, gateway, or data concentrator. Use MSTR blocks to issue reads and writes out any port.
Program the PLC from the Ethernet port or the serial ports. This Compact Ethernet/Serial Network Option module has a 10BaseT Ethernet port and two switch-selectable RS-232/RS-485 serial ports. One RS-232 port for connecting to a radio modem (RNIM server), one RS-485 port for connecting to Modbus RTU servers (Modbus RTU Client). Serial Protocol Converter and data-level translator for adding Modbus RTU server devices to an RNIM radio network. It is especially designed for use with Modicon? PLCs and Niobrara communication modules equipped with RJ-45 RS-232 ports. The DDC2I is a DIN rail mounted optically isolated RS-232 to RS-422/485 converter. Email: Description:Based in Joplin, Missouri, Niobrara Research & Development Corporation is a manufacturer of industrial communication equipment including protocol translation modules, network interfaces, I/O bus interfaces, specialty modems, smart cables, and accessories for programmable controllers and other industrial automation equipment.
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