Projecta IM2000 Provozní pokyny stáhnout pdf (Strana 44)

Powering the Optocouplers

In order to maintain isolation, the optocouplers must be powered by an external

power supply connected to P1:4, with the opto supply ground connected to the

ground of the input control circuitry. The logic inputs are internally limited to

allow for a +5VDC power supply.

A power supply in excess of +5 volts may be used, however a current limiting

resistor MUST be placed in series with the input to limit the input forward

current to the recommended 7 milliamps. At no time can the input forward

current exceed 15 milliamps or damage may occur to the drive.

WARNING! The isolated logic inputs on the IM483 are internally

limited to allow for an optocoupler supply voltage of +5 VDC. If

using a higher voltage supply, a current limiting resistor must be

placed in series with the input or damage will occur to the

IM483’s input circuitry, rendering the drive inoperable.

Table 7.3: Recommended Input Current Limiting Resistor Values

srotsiseRgnitimiLtnerruCtupnIdetalosI

ylppuSotpO

)CDV+(

eulaVrotsiseR

)%5smhO(

eulaVrotsiseR

)%1smhO(

5--

01 086 186

2100010001

51 0031 0031

4200720762

Isolated Logic Input Characteristics

Step Clock (P1:2)

The step clock input is where the motion clock from your control circuitry will

be connected. A positive going edge on this input will increment or decrement

the sine/cosine position generator in the IM2000 ASIC. The size of this

increment or decrement will depend on the microstep resolution setting. The

motor will advance one microstep in the plus or minus direction (based upon

the state of the direction input) on the rising edge of each clock pulse.

The positive going edge of this input will also update and latch the states of the

direction and microstep select inputs. If no change has occured to these inputs

then the drive will make the next step.

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Projecta IM2000 Provozní pokyny Strana 44