Analog and Digital Signal Converters  from Prime Controls Co.   Novus Automation
Novus Automation manufacturers industrial electronic products such as temperature controls, electronic thermostats and data loggers. They also make several useful signal converters. These units are normally in stock at Florida with standard delivery about 7-10 days.
digirail
DigiRail Modbus I/O
  • DIN Rail mount, 3 models
  • DigiRail-2A: 2 Analog Inputs - Thermocouple, RTD, mV. V, mA
  • DigiRail-2R: 2 Relay Ouputs - SPDT 8A 250VAC separate commons
  • DigiRail-4C: 4 Digital Counters - or just use as digital inputs
PDF:   datasheet     manuals
airgate-modbus Airgate-Modbus Gateway
  • Wireless Gateway for Modbus Communications
  • allows easy insertion of wireless branches into wired networks
  • four operating modes, master and slave
  • 1500V isolation protects computer and devices
PDF:   datasheet     manual
usb-i485 USB-RS485 Converter
  • USB V1.1 Plug and Play interface
  • automatically installs as a native serial port
  • one full-duplex (4-wire) or two half-duplex (2-wire) busses
  • 1500V isolation protects computer and devices
PDF:   datasheet     manual