Heidenhain: Interface Electronics (Gateway PROFINET IO)

Interface electronics from HEIDENHAIN adapt the encoder signals to the interface of the subsequent electronics. They are used when the subsequent electronics cannot directly process the output signals from HEIDENHAIN encoders, or if additional interpolation of the signals is necessary.

HEIDENHAIN interface electronics are available in various mechanical designs.

PROFINET Gateway | For connecting EnDat encoders

Encoders with EnDat interface for connection via gateway Absolute encoders from HEIDENHAIN with EnDat interface are suitable for PROFINET IO. The encoder is electrically connected through a gateway. The complete interface electronics are integrated in the gateway, as well as a voltage converter for supplying EnDat encoders with DC 5 V ±5 %. This offers a number of benefits:

Besides the EnDat encoder connector, the gateway provides connections for PROFINET and the power supply. Since the gateway is a bus member, the cable to the encoder is not a stub line, although it can be up to 40 meters long.

PROFINET IO

PROFINET IO is the open Industrial Ethernet Standard for industrial communication. It builds on the field-proven function model of PROFIBUS-DP, but uses fast Ethernet technology as physical transmission medium and is therefore tailored for fast transmission of I/O data. It offers the possibility of transmission for required data, parameters and IT functions at the same time.

Physical Characteristics

HEIDENHAIN encoders and the gateway are connected to PROFINET in accordance with 100BASE-TX (IEEE 802.3 Clause 25) via one shielded twisted pair of wires per direction. The data transfer rate is 100 Mbit/s (Fast Ethernet).

PROFINET Profile

HEIDENHAIN encoders and gateways fulfill the definitions as per Profile 3.162, Version 4.1. The device profile describes the encoder functions. Rotary encoders support the functions of class 4 (full range of scaling and preset functions). The functions supported by the gateway vary depending on the connected encoder. More information about PROFINET can be obtained from the PROFIBUS user organization (PNO).

Commissioning

To put an encoder with PROFINET interface into service, a general station description (GSD or GSDML) fi le must be downloaded and imported into the configuration software. The GSD or GSDML contains the execution parameters required for a PROFINET IO device.

Encoders or gateway with PROFINET

Encoders with integrated PROFINET interface or the gateway are directly integrated in the network. Addresses are distributed automatically over a protocol integrated in PROFINET. A PROFINET-IO fi eld device is addressed within a network through its physical device MAC address. The encoders feature two double-color LEDs for diagnostics of the bus and the device.