Redundant Ethernet/IP to Profibus-PA
The EN2PAR provides a fast and integrated solution for adding Profibus-PA field devices to any Logix platform. These linking devices provide a direct link between Profibus-PA and EtherNet/IP, with no intermediate Profibus-DP layer required.
Profibus PA is a convenient 2-wire instrument bus and a popular choice in process control. The network is based on the IEC 61158 specification and operates at 31.25 KBits/s supplying power and communication on the same cable. The 1788-EN2PAR device is a self contained, DIN-rail mountable device, linking an EtherNet/IP network to a local Profibus-PA segment. The unit operates as a true PA master, and does not require any DP network, DP master, coupler device or external power conditioner. Up to 24 PA field devices can be connected to each EN2PAR.
The EN2PAR multiple levels of device and media redundancy. Two physical Profibus-PA ports are provided, each with their own internal power conditioners and protection. Both ports form part of the same logical PA segment and can be used in various redundant topologies, including:
- Split bus
- Dual media (Requires Hiprom's PAR-JB junction box)
- Ring (Requires Hiprom's PAR-JB junction box)
By incorporating Rockwell Automation's Embedded Ethernet Switch technology, the EN2PAR hosts two Ethernet ports. This allows the unit to be connected in a Linear topology or in a Device Level Ring (DLR) topology. The latter providing Ethernet media redundancy.
Redundancy (Master Device)
The EN2PAR can be configured to run in a multi-master configuration. Thus allows two, identically configured, EN2PA-R masters to be connected on the same Profibus-PA network. The masters effectively share the bus, with both providing power and transferring data between the PA field devices and the Logix controller.
Integration into RSLogix5000 is seamless when making use of the modules' Add-On-Profiles (AOPs), and the process variables of each field device appear in engineering units without any required user logic. All Profibus-PA configuration is done within the RSLogix5000 environment. Additional PV statuses and diagnostic information is also available.
FDT/DTM technology is supported allowing direct access to the field devices diagnostics and parameters using an FDT frame such as FTAssetCentre. In addition to this, a field device DTM can be launched from within the RSLogix5000 environment using Hiprom's FDT-ThinFrame technology. FDT-ThinFrame also allows a device DTM to be launched from within the FTViewSE HMI, allowing the operator a graphical view into the state and diagnostics of the field device.
The EN2PAR provides a number of invaluable diagnostic parameters further simplifying the commissioning of large networks. These include instrument specific diagnostics as well as network diagnostics, such as: (All basic diagnostic information is available in the input assembly.)
- Power Supply Voltage
- PABus Voltage ( A & B bus)
- PABus Current ( A & B bus)
- Unit InternalTemperature
- Supply Voltage
- Minimum 20 vdc
- Maximum 32 vdc
- Internal current consumption
- Typical 260 mA ( at 24 Vdc - no bus current )
- Maximum PA bus supply current
- Typical 500 mA (per PA port)
- Maximum PA field devices
- 0 - 50 °C
- Dimensions (w x h x d)
- 80mm x 152mm x 136mm