EIA-485


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EIA-485

(communications, standard)
(Formerly "RS-485") An EIA serial line standard which specifies 2-wire, half-duplex, differential line, multi-point communications. Maximum cable length is 1200m. Maximum data rates are 10Mbps at 1.2m or 100Kbps at 1200m. EIA-485 can implement a truly multi-point communications network, and specifies up to 32 drivers and 32 receivers on a single (2-wire) bus.

Differential SCSI uses EIA-485.

Details on RS-232, 422, 423, and 485.
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Its offerings include industrial data solutions that support industrial Ethernet and bus networks, as well as EIA-485 applications, instrumentation and control cables; armored cables; flexible automation cables; pan/tilt/zoom CCTV camera cables; fire alarm cables; sound (paging) cables; and switches.
The system shall utilize intelligent distributed control modules, which communicate over an EIA-485 BACnet controller network The system shall provide the Direct Digital Control (DDC), Energy Management and Building Automation System for the air conditioning, heating and ventilating systems and shall interface with other microprocessor based building subsystems.
For the data acquisition in the measurement system are used the Advantech ADAM 4015 modules, which are able to communicate with the master system using the ModBus/ASCII protocol over the EIA-485 industrial bus.
These units are communicating through the EIA-485 industrial bus with the ModBus/RTU protocol.
Communication varies from RS422/423 and EIA-485 serial-communication to interconnectivity solutions including gateways and integrated DeviceNet, Ethernet and Palm for supporting applications from a remote location.
A rear serial communications port is available as either an EIA-232 or an EIA-485 interface.
It offers wired EIA-232, EIA-485 and Ethernet connectivity as well as wireless Zigbee connectivity to remote sensors and thermostats.
Communication varies from RS-422/423 and EIA-485 serial-communication to interconnectivity solutions including gateways and integrated DeviceNet, Ethernet and Palm for supporting applications from a remote location.
With the UltraPort SI, Perle is the first vendor to incorporate EIA-232, EIA-422 and EIA-485 interfaces on a single PCI serial card and provide the ability to individually configure each interface type using software commands.
Numerous interfaces are available, including EIA-232, EIA-422, EIA-485, J1708, Ethernet and Power-over-Ethernet.