HA4B - RS232 ISOLATED 1-WIRE HOST ADAPTER 

HA4B - RS232 Isolated 1-Wire Host Adapter

Product Code: HA4B Price: Check Latest The HA4B is a RS232 to isolated 1-Wire adapter. Designed to mate with the DB9 RS232 port of a PC, this powered converter provides the necessary level conversion from RS232 to 1-Wire device levels while providing 2000VAC isolation from the PC to the network. When CAT-5 twisted pair cable is used, the HA4B can drive up to 200 1-Wire devices at cable lengths of up to 2000 feet. The HA4B is recommended for applications where isolation from the network is required; analog applications or isolated digital applications. The HA4B typically withstands 1600VRMS for 1 minute or 2000VRMS for 1 second. External power is applied via a standard power jack. Boost current for DS18B20 or DS18S20 temperature conversion is provided by RTS switching so that parasitic temperature conversion is supported. The HA4B also has an improved short-circuited network recovery function that provides fast recovery from a shorted (energy depleted) network. The circuitry in the network driver stage of the HA4B automatically senses a shorted network and provides a high current boost to the network until all the devices on the network have recovered to a viable operation voltage. EDS OneSix™ DDE Server and OPC Software Drivers support the HA4B. This makes connecting EDS 1-Wire products to your PC easy. The Standard HA4B comes with the OneSix™ DDE Server Software and a single user license. Features RS232 to Isolated 1-Wire adapter. 2000 feet, 200 devices per CAT-5 twisted pair 1-Wire bus. Automatically provides smart strong-pull-up for wired sensors. ESD Protection more than 27kV (IEC801-2 Reference Model.). Built-in DB9 for cable connection to PC. 9 VDC AC Adapter included. Provides isolated power to the network. Short-circuited network recovery function. Specifications Supply Voltage: 5.5-35 Volts Supply Current: 100 mA Output Voltage (isolated "+" pin): 4.5-6 Volts Output Current (isolated "+" pin): 25 - 35 mA Shorted network recovery current: 60 - 85 mA Isolation Voltage 1 Minute: 1600 Volts Isolation Voltage 1 Second: 2000 Volts Isolation Resistance: 100 - 10,000 MOhms 1-Wire is a registered trademark of Dallas Semiconductor.