Elmo RAV-25/60 manual External Current Limit Continuous Eclc, External Current Limit Peak Eclp

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Raven Installation Guide

Servo Control Operation

MAN-RAVIG (Ver. 1.1)

 

 

 

4-3

4.4External Current Limit - Continuous (ECLC)

The continuous current limit of the Raven amplifier can be scaled down by an external voltage or by an external resistor connected from pin J2/1 (ECLC) to pin J2/2 (ECLRET).

4.4.1External Voltage

An external positive voltage (0 to 3.75 V) to terminal J2/1 (ECLC) in reference to terminal J2/2 (ECLRET) will control the continuous current limit from zero to Ic(nom).

IC(new) =

VECLC

* Ic(nom)

3.75V

 

 

The voltage is internally clamped to 3.75 V whenever the external VECLC is greater than 3.75 V.

The external voltage source must be able to source/ sink at least ±0.4 mA. The maximum absolute VECLC is 12 V.

4.4.2External Resistor

Connect an external resistor between terminal J2/1 (ECLC) and terminal J2/2 (ECLRET). The resistor value is given by:

RECLC (Kohm) = 12.5 *

Ic(new)

- 1

Ic(nom)

 

 

0 < RECLC < 11.4 K (1/8 Watt)

At RECLC greater than 11.4 K, the current limit will be internally clamped to the nominal value.

IC(nom) is the nominal continuous current limit of the amplifier.

4.5External Current Limit - Peak (ECLP)

The peak current limit of the Raven amplifier can be scaled down by an external voltage or by an external resistor connected between pin J2/3 (ECLP) and pin J2/2 (ECLRET).

4.5.1External Voltage

An external positive voltage (0 to 3.75 V) to terminal J2/3 (ECLP) in reference to terminal J2/2 (ECLRET) will control the peak current limit from zero to Ip(nom).

Ip(new) =

VECLP

* Ip(nom)

3.75V

 

 

The voltage is internally clamped to 3.75 V whenever the external VECLP is higher than 3.75 V.

The external voltage source must be able to source/sink at least ±0.4 mA. The maximum absolute VECLP is 12 V.

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Contents Raven April 2008 VerRAV- XX/YYY VerContents Safety 4 EMC Workmanship 6 PCB Packing Weee RoHS Safety Information Cleaning after solderingConformance to Standards Introduction ExtrIQ Product FamilyFault Protection Standard FeaturesProduct Description 1Raven Block Diagram How to Use this Guide Site Requirements InstallationFeature Value Unpacking the Amplifier ComponentsRaven Dimensions 1Raven DimensionsMounting the Heatsink 1Dimensions in MillimetersMounting the Raven Mounting on the PC BoardWiring the Raven Basic WiringPin Functions 3Raven Power ConnectionsConnections Pin Function Remarks4Connector J1 Pin # Short Form Function Remarks5Connector J2 Elcl6Connector J3 AOKVdcmin Vdc 0.9 Vdcmax DC Power SupplyAmplifier Voltage Range 50 55 100 200 Servo Control Operation Current Command InputCFM Current Gain Control CGC 2Minimum Inductance ValuesExternal Voltage External Current Limit Continuous EclcExternal Current Limit Peak Eclp External ResistorLatch Mode LM Amplifier Enable LogicStatus Indications 3Raven Status IndicationsPower Ratings Appendix Technical SpecificationsElectrical Specifications Mechanical Specifications Environmental ConditionsStandards Compliance Quality Assurance SafetyDesign Packing WorkmanshipRoHS Raven Installation Guide