AMS Read Head Interfaces

Connector Type Overview

SCHNEEBERGER offers various connector interfaces to accommodate different control systems and application requirements.

TSU/TSD 12-pin plug

TRU/TRD 12-pin plug

TRH 17-pin plug

TMU/TMD mounting base

TMH 17-pin mounting base

TDC 8-pin electronics housing

TSU/TRU/TMU Analog Interface

The signals are shown inverted according to differential gain. The incremental signals are displaced by exactly 90° in their phasing. The levels after differential gain of the incremental signals and of the reference signals are 1 ± 0.1 Vpp. The incremental signals supply valid values between 0.6 Vpp and 1.2 Vpp. This interface works with all standard control systems that support a 1 Vpp voltage interface.

Analog voltage interface signal waveform

TSU/TRU/TMU pinout

Pinout Configuration

TSD/TRD/TMD Digital Interface

Incremental signals A+, A-, B+, B- and reference signals R+, R- transmit data in a complementary manner according to RS 422 standard. The diagram shows positive signals, with signal levels as follows:

Digital interface timing diagram

TRD/TMD pinout

Rise and fall times are less than 20 ns. Minimum signal spacing can be calculated from the maximum output frequency. Downstream electronics must be able to handle the maximum output frequency without problems.

Reference Pulse Options

Interpolation Factor, Maximum Output Frequency, and Reference Pulse Combinations

The following combinations apply to all read head interfaces:

TSD/TRD/TMD Pinout Configuration

Absolute Interfaces TRH / TMH / TSH

Absolute position information can be transmitted via fully digital interfaces or hybrid interfaces.

TRH/TMH/TSH interface timing diagram

TRH/TMH/TSH pinout

Fully Digital SSI Interface

In the fully digital SSI interface, the first channel (+clock) sends clock signals from the receiver to the measuring system; the second channel (+data) simultaneously sends absolute position values from the measuring system to the downstream electronic unit.

Fanuc Serial Interface

Another fully digital interface example is the "Fanuc Serial Interface." The motor controller only sends a request signal (REQ) instead of pulses. The measuring system calculates the clock rate accordingly, which is used to send position data and supplementary data (SD) to the receiver.

SSI+SinCos Hybrid Interface

The SSI+SinCos hybrid interface only sends digital absolute initial position at power-on, then sends incremental 1 Vpp signals.

TRH/TMH/TSH Pinout Configuration (SSI / Fanuc / Mitsubishi Interface)

If the controller is not using the line for supply voltage feedback, the contacts 1 and 7 and the contacts 4 and 10 can be combined to reduce the voltage drop or to permit longer cable lengths. The contacts 1 and 7, and the contacts 4 and 10, are interconnected on the AMS side.

Absolute Interface TDC (DRIVE-CLiQ)

Absolute information from the measuring system is transmitted via the DRIVE-CLiQ communication interface, a real-time serial interface for bidirectional data transmission with Siemens controllers.

TDC DRIVE-CLiQ interface

TDC pinout diagram

The measuring system connection is suitable for safety-oriented applications and supports the SAFETY INTEGRATED function available for Siemens SINAMCS and SINUMERIK controllers. The system complies with IEC 61508-1:2010 functional safety requirements.

DRIVE-CLiQ is a registered trademark of Siemens

TDC Pinout Configuration