Heidenhain: Interface Electronics (Gateway PROFIBUS DP)
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.
PROFIBUS Gateway | For Connecting EnDat Encoders
Encoders with EnDat interface for connection via gateway All absolute encoders from HEIDENHAIN with EnDat interface are suitable for PROFIBUS-DP. 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:
Simple connection of the field bus cable, since the terminals are easily accessible.
Encoder dimensions remain small.
No temperature restrictions for the encoder. All temperature-sensitive components are in the gateway.
No bus interruption when an encoder is exchanged.
Besides the EnDat encoder connector, the gateway provides connections for the PROFIBUS and the power supply. In the gateway there are coding switches for addressing and selecting the terminating resistor.
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.
PROFIBUS is a nonproprietary, open field bus in accordance with the EN 50 170 standard. The connecting of sensors through field bus systems minimizes the cost of cabling and reduces the number of lines between encoder and subsequent electronics.
The PNO (PROFIBUS user organization) has defined a standard, nonproprietary profile for the connection of absolute encoders to the PROFIBUS-DP. This ensures high flexibility and simple configuration on all systems that use this standardized profile.
The device identification records (GSD) completely and clearly describe the characteristics of the gateway in an exactly defined format. The GSD fi le can be downloaded from the HEIDENHAIN FileBase.
This profile can be obtained from the Profibus user organization (PNO) in Karlsruhe, Germany, under the order number 3.062. There are two classes defined in the profile, where class 1 provides minimum support, and class 2 allows additional, in part optional functions.
These profiles can be obtained from the Profibus user organization (PNO) in Karlsruhe, Germany, under the order number 3.162. This profile also distinguishes between two device classes:
Optional functions are defined in addition to the mandatory functions of classes 3 and 4.