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Section 7

Interfacing and Controlling the IM483

Section Overview

This section covers the interface connections, configuration and control signals

of the IM483. Covered are:

 Layout and Interface Guidelines.

 Motor Power Connection (+V).

 Controlling the Output Current

 Controlling the Output Resolution.

 Logic Interface Connection and Use.

 Using the Fault Output.

 Using the On-Fullstep Output.

 Minimum Required Connections.

Layout and Interface Guidelines

Logic level signals should not run parallel to motor phase signals. The motor

phase signals will couple noise onto the logic level signals. This will cause rough

motor motion and unreliable system operation. The motor phase signals should

be run as pairs.

When leaving the driver module, motor cables should not run parallel with

other wires. Phases should be wired using twisted pairs. If motor cabling in

excess of one foot is required, motor cabling should be shielded twisted pairs to

reduce the transmission of EMI. The shield must be tied to AC ground at the

driver end only, or the supply ground if AC ground is not available. The motor

end must be left floating.

If more than one driver is connected to the power supply, separate power and

ground connections from each driver to the power supply should be used. Do

not “daisy chain”.

The power supply cables need to be a twisted pair if power is connected from a

source external to the board. If multiple drivers are used with an external

power source and it is not possible to run separate power and ground connec-

tions to each driver, a low impedance electrolytic capacitor equivalent to two

times the total capacitance of all driver capacitors and of equal voltage must be

placed at the power input of the board.

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Projecta IM2000 Istruzioni per gli Interventi Pagina 34