1. Model Code Definition

• CACR-SR: Classic vintage analog servo amplifier platform exclusively matched with Yasnac VS series CNC controller

• 03: Rated output power = 300W (0.3kW)

• A: Standard main control PCB base specification

• D: Upgraded power circuit & internal layout, enhanced instantaneous overload tolerance vs AB/AC base versions

• 1: Differential line-driver pulse position input (pulse command type; digit "2" = ±10V analog speed input)

• K: Dedicated encoder interface circuit for 4000PPR incremental encoder (D-code defined 4000 pulses/rev feedback)

• R: Standard metal base housing, regular cabinet mounting structure (non-custom casing vs FU suffix models)

2. Electrical Specifications

• Input Power: Single/Three-phase AC 200~230V, 50/60Hz industrial 200V-class power supply

• Continuous rated output current: 3.0A; Peak overload output current: 8.5A

• Matched Servo Motor: Yaskawa USAM-03 / USAF-03 300W servo motor with 4000PPR incremental encoder (unique K feedback circuit)

• Control Loop: Triple closed-loop (current + speed + position); default differential pulse train command input, analog ±10V command switchable via internal parameter setting

3. Connector Configuration

1. Main power terminals: R/S = AC input power; U/V/W = 3-phase motor output; spare terminals for external dynamic braking resistor connection

2. CN1 (50Pin control port): Exclusive K-version customized pin definition, different from AC1ER/AB1ER standard pinout; dedicated wiring for pulse command, servo enable, ready signal output, fault alarm & CNC interlock signals

3. CN2 (20Pin encoder port): Modified internal feedback circuit supporting 4000PPR encoder, incompatible with standard 1500PPR E-type encoder wiring directly

4. Environmental & Mechanical Parameters

• Operating ambient temperature: 0℃ ~ +55℃; Storage temperature: -20℃ ~ +60℃

• Relative humidity ≤95%RH (non-condensing); Max installation altitude ≤1000m above sea level

• Protection grade: IP20 (only indoor cabinet installation); Net weight ≈3.0kg

• Cooling mode: Natural convection air cooling for low-power 300W design

5. Functional & Parameter Features

• Full adjustable parameters (loop gain, electronic gear ratio, input filter, command mode) via front panel single-digit LED keypad; no OEM parameter lock (different from Yxx customized locked drives)

• Supports manual jog test, no-load motor commissioning, pulse/analog command mode switching by parameter modification

• Single-digit seven-segment LED displays running status and fault alarm codes

6. Built-in Protection & Fault Codes

• 1: Overcurrent fault

• 2: Abnormal main power supply voltage

• A: Encoder cable break/disconnection fault

• F: Internal power module overheat shutdown

• C: Main control board hardware failure

  Fault reset: Disconnect main AC power for minimum 30 seconds after troubleshooting before power-on restart

7. Compatibility & Replacement Instructions

1. Direct plug-and-play replacement only with identical CACR-SR03AD1KR unit

2. Cannot directly interchange with CACR-SR03AC1ER / AB1ER: mismatched CN1 I/O pin definition + different encoder feedback circuit (1500PPR vs 4000PPR); full CN1 rewiring + parameter recalibration mandatory for substitution

3. Incompatible with FU customized casing series and Y-suffix locked OEM drives (Y105/Y8 etc): customized internal circuit & locked factory parameters, cannot direct replacement

4. AD2KR variant (analog ±10V command): command input type totally different, pulse input disabled by factory default, no cross compatibility

8. Application Scope