Protocols

AS-Interface

AS-Interface networks up to 62 field devices onto a single pair of wires that delivers both signal and power.

IO-Link

IO-Link field devices provide for easy deployment and utilize advanced diagnostics to improve preventative maintenance, reduce trouble shooting, and minimize failures for ultimate cost savings.

DeviceNet

DeviceNet protocol dramatically reduces costs by integrating up to 62 devices on a 4-wire trunk network. Communications data is carried over two wires with a second pair of wires carrying power.

FOUNDATION Fieldbus

FOUNDATION Fieldbus H1 level has been designed as a digital replacement of the 4 to 20mA standard in the process industries. The physical wiring is fully compatible with intrinsic safety (IS) or nonincendive wiring standards. May be used in hazardous, as well as general purpose areas.

HART

HART (Highway Addressable Remote Transducer) was developed to enable greater data communication with field instrumentation like transmitters and controllers. The bidirectional communication provides for data transfer between smart instrumentation and a host system Asset management tool or handheld tool.

Modbus

Modbus has been the defacto standard for interfacing remote I/O and PLCs into the process DCS system. Most legacy control systems interface conveniently with the Modbus standard. Numerous actuator and instrument manufacturers support the protocol, therefore, it is used extensively as a “fieldbus” network as well.

Profibus

Profibus originated in the European market and has become a worldwide standard because of its performance attributes. It is designed for use in special applications. Profibus-PA connects directly into Profibus-DP and may be used in intrinsically safe applications. DP uses the RS485 physical layer while PA uses the IEC 61158-2 physical layer designed primarily for process applications