Rockwell-automation 1746-HSCE High-Speed Counter Module Installation I Manual de usuario descargar pdf (Pagina 17)

High-Speed Counter Module 17

Publication 1746-IN011C-EN-P - April 2005

Single-Ended Encoder Wiring (Sourcing)

Single-Ended Encoder Output Waveforms (Sourcing)

The figure below shows the single-ended encoder output waveforms. When the

waveform is low, the encoder output transistor is OFF.

VS Value R Value Maximum Output Leakage

+5V dc no resistor needed 100 µA

+12V dc 1800 ohm 1/4W 5% 100 µA

+24V dc 4700 ohm 1/4W 5% 100 µA

A(+)

A(-)

B(+)

B(-)

Z(+)

Z(-)

12 34

+VDC

COM

GND

Belden 9503 or equivalent

305m (1000tft) max length

Power

Supply

Shield

(2)

Module Inputs

SW1

OFF

(All switches OFF)

cable

(1)

single ended

encoder

(4)

(1) Refer to your encoder manual for proper cable type and length.

(2) Due to the topology of the module’s input circuits, terminating the shield at the encoder end provides the highest immunity

(3) The resistor (R) value depends on the power supply value (VS). The table below lists the resistor values for typical power

supply values. These resistors must be located at the encoder end of the cable.

(4) The Allen-Bradley 845H sourcing encoder is not compatible with this module.

(3)

Earth

low = transistor OFF

high = transistor ON

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Rockwell-automation 1746-HSCE High-Speed Counter Module Installation I Manual de usuario Pagina 17

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