Moons' SRAC2 Bedienungsanleitung

SRAC2

AC Input Step Motor Drive

User Manual

Rev. 1.1

AMP & MOONS’ Automation

Rev. 1.2

10/6/2021

SRAC2 User Manual

Contents

1 Introduction.................................................................................. 3

1.1 Features.............................................................................................3

1.2 Block diagram ....................................................................................4

2 Mounting the Drive ...................................................................... 4

3 Connections ................................................................................ 5

3.1 Connecting to Power .........................................................................6

3.3 Connecting the Inputs and Outputs ...................................................8

3.3.1 Step & Direction Inputs..............................................................................8

3.3.2 EN input.....................................................................................................9

3.3.3 Fault Output.............................................................................................10

4 Switch Selection ........................................................................ 11

4.1 Microstep Resolution ....................................................................... 11

4.2 Running Current ..............................................................................12

4.3 Idle Current ......................................................................................12

4.4 Step Input Signal Filter ....................................................................12

4.5 Anti Resonance................................................................................12

4.6 Step Smoothing Filter ......................................................................13

4.7 Self Test ...........................................................................................13

4.8 Step/Direction Mode and CW/CCW Mode Jumper..........................13

5 Motor selection .......................................................................... 14

5.1 Recommended motors ....................................................................15

5.2 Torque-Speed Curves .....................................................................15

6 Error Codes ............................................................................... 16

7 Reference Materials .................................................................. 17

7.1 Mechanical Outline ..........................................................................17

7.2 Specications...................................................................................18

7.2.1 Electrical Specications...........................................................................18

7.2.2 Environmental Specications ..................................................................18

8 Contacting MOONS’.................................................................. 19

3Rev. 1.2

10/6/2021

SRAC2 User Manual

1 Introduction

Thank you for selecting the MOONS’ SRAC2 Step Motor Drive. The SRAC2 series AC input drives

are based on advanced digital current control technology and provide high torque, low noise and

low vibration. Many of the operational paramteres are switch selectable. We hope our dedication

to performance, quality and economy will make your motion control project successful.

1.1 Features

• Advanced digital current control provides excellent high speed torque

• Auto Setup measures motor parameters and congures motor current control and anti-

resonance gain settings

• Uses universal AC input 80 to 265 VAC, AC Input Voltage must be selected by switch

• Speed Range - up to 50 rps

• Microstep Resolution - switch selectable, 16 settings: 200, 400, 800, 1600, 3200, 6400,

12800, 25600, 1000, 2000, 4000, 5000, 8000, 10000, 20000, 25000 steps/rev

• Running Current - peak setting, switch selectable, 8 settings: 0.6A, 0.8A, 1.0A, 1.2A, 1.6A,

1.8A, 2.0A, 2.5A.

• Idle Current - automatic reduction of running current 1 second after the motor stops, switch

selectable, 2 settings: 50%, 90% of running current

• Anti Resonance - raises the system-damping ratio to eliminate midrange instability and allow

stable operation throughout the speed range of the motor, switch selectable, 2 settings for low

to high inertia loads

• Control Modes - Step/Direction pulse input or CW/CCW pulse input, internal jumper switch

selectable

• Input Signal Filter - lters out unwanted noise that can cause extra steps, switch selectable,

2MHz or 150KHz

• Step Smoothing Filter (Microstep Emulation) - performs high resolution stepping by

synthesizing coarse steps into ne micro-steps, switch selectable, ON or OFF

• Self Test - performs a1 rev, 0.5RPS, CW/CCW move test, switch selectable, ON or OFF

• Motor Selection - a 16 bit rotary switch is used to select the desired motor database which is

pre-loaded at the Factory

Rev. 1.2

10/6/2021

SRAC2 User Manual

1.2 Block diagram

2 Mounting the Drive

The SRAC2 drive can be mounted only on the narrow side of the chassis. M4 screws should be

used in the two holes at the back of the drive.

The ampliers in the drive generate heat. To operate the drive continuously at maximum power

forced air cooling, as from a fan, should be provided.

Never use the drive in a space where there is no air ow or where other devices can cause the

surrounding air to be more than 40 °C. Never put the drive where it can get wet or where metal

particles can fall into it.

Never use the drive in a space where there is no air ow or where other devices can

cause the surrounding air to be more than 40 °C

Never put the drive where it can get wet or where metal particles can fall into it

STEP

DIR

OUT

Gate

Drivers

(3)

Optical

Isolation

output

Optical

Isolation

output

Over

Current

Det.

DSP

switching

reg

MOSFETs

(6) motor

Voltage

Det.

10V

reg

3.3V

reg

LED

SRAC2

Block Diagram

Step Noise Filter

Load Inertia

Smoothing Filter

Self Test

Step Res 1

Step Res 2

Step Res 3

Step Res 4

Current Set 1

Current Set 2

Current Set 3

Idle Current

80～135VAC

AC Input

135～265VAC

5Rev. 1.2

10/6/2021

SRAC2 User Manual

3 Connections

To use the SRAC2 Step Drive, the following items are needed:

• Universal AC input of 80 to 265 VAC

• Pulse & Direction signal

• A compatible step motor

• AC input voltage must be selected by switch

Rev. 1.2

10/6/2021

SRAC2 User Manual

3.1 Connecting to Power

Use the supplied connector to connect to the AC supply according to the diagram below. Use 16

AWG wire for Line (L) and Neutral (N). Use 14 AWG for Earth Ground (G).

AC input voltage must be selected by switch.Check input voltage avoiding damage

before power on!

80Vac<Input AC Voltage<135Vac: set the switch on 115V Status

135Vac<Input AC Voltage<265Vac: set the switch on 230V Status

The SRAC2 contains an internal 5A fast acting fuse.

Care should always be taken when working with high voltages.

3.2 Connecting to a Motor

Motor connections should be made according to the following diagrams.

Earth Ground (green)

Neutral (white)

Line-hot (black)

7Rev. 1.2

10/6/2021

SRAC2 User Manual

White

Green

Brown

Yellow

Gray Blue

Red

Pink

Brown

Green

Pink

Blue

White

Yellow

Red

Gray

Rev. 1.2

10/6/2021

SRAC2 User Manual

3.3 Connecting the Inputs and Outputs

3.3.1 Step & Direction Inputs

The SRAC2 Step Drive has two high speed optically isolated inputs called STEP and DIR. They

accept 5 to 24 volt single-ended or di󰀨erential signals, up to 2MHz. The maximum voltage that can

be applied to the input is 28V.

The motor executes one step when the STEP input closes.

The direction of rotation is controlled by the DIR input state. A closed input (logic “0”) will result in

clockwise rotation, and an open input (logic “1”) will result in counterclockwise rotation.

SRAC2

9Rev. 1.2

10/6/2021

SRAC2 User Manual

3.3.2 EN input

The EN input enables or disables the drive amplier. It is an optically isolated input that accepts

a 5 to 24 volt single-ended or di󰀨erential signal. The maximum voltage that can be applied to the

input is 28V.

When EN input is closed, the driver amplier is deactivated, all the MOSFETs will shut down, and

the motor will be free. When EN input is open, the drive is activated.

When the drive has encountered an error and the fault is removed from the system, a falling signal

into the EN input will reset the error status and activate the drive amplier again.

SRAC2

Rev. 1.2

10/6/2021

SRAC2 User Manual

3.3.3 Fault Output

The FAULT Output is optically isolated. The maximum collector current is 100mA, and the

maximum collector to emitter voltage is 30 volts. The output can be wired to sink or source current.

When drive is working normally, the output is open. When the drive encounters an error, the output

closes.

SRAC2

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