User`s manual

SECTION 3: WIRING AND INSTALLATION T200 User's Manual
PAGE 3-79
3.16 Incremental Encoder/Stepper Motor Interface Input Description.
The T200 has an RS422 based incremental encoder input on Connector J5 as shown in Figure 3.49. The same inputs are
used for the Stepper Motor inputs.
Figure 3.47: Incremental Encoder per channel Input Electrical Description
§ Input Impedance is 120Ω in series with a 1nF capacitor, to reduce driver power losses. A 10k resistor also
connects each input to Digital Ground (DGND).
§ Expected signal levels on the inputs are 0-5V differential.
§ A 5V power output line is provided to power the incremental encoder. The output power supply 5V line has a
100mA-continuous fuse which will open-circuit if the current exceeds 300mA. Note that the fuse is resetable.
§ Maximum input voltages: 25V Input+ to Input- differential
25V Input± to DGND or T200 PE connection
§ All T200 inputs are isolated from high voltage circuitry internally by double insulation standard isolation, and are
considered Safety Extra Low Voltage.
§ The Internal Inputs are fed to fast internal digital circuitry, which further digital filters these inputs to remove high
speed glitches which have passed through the differential amplifier.
§ Up to 1MHz input pulse rate.