1. Model Code Definition & Custom Marking

• CACR-SR: 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 specification

• B: Revised internal power circuit layout

• 2: ±10V analog voltage command input (speed/position analog signal, core vs AB1ER differential pulse input)

• E: Designed for 1500PPR incremental encoder feedback

• R: Standard base & mechanical housing

• -Y105: Exclusive OEM custom specification code: dedicated CN1 50pin pin assignment, factory pre-locked control parameters, customized I/O logic for designated CNC machine manufacturer; non-interchangeable with standard CACR-SR03AB2ER without wiring & parameter modification

2. Electrical Specifications

• Input Power: Single/Three-phase AC200~230V, 50/60Hz (200V industrial grade input)

• Continuous rated output current: 3.0A

• Compatible Servo Motors: Yaskawa USAM-03 / USAF-03 300W series with 1500PPR incremental encoder only (Y105 parameter locked for matched original motor)

• Control Loop: Triple closed-loop (current + speed + position); only accepts ±10V analog speed/position command from Yasnac VS-800 CNC; differential pulse command function is disabled by factory preset

3. Connector Terminal Description

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

2. CN1 (50Pin control connector): Customized Y105 exclusive pin definition, different from standard AB2ER, Y1/Y3/Y82 pin layout for servo enable, ready signal, fault alarm output and CNC interlock logic

3. CN2 (20Pin encoder port): Standard universal pinout consistent with full SR03 series for 1500PPR encoder wiring

4. Environmental & Mechanical Data

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

• Working humidity ≤95%RH non-condensing; Max installation altitude ≤1000m

• Protection class: IP20 (must be installed inside control cabinet); Net weight ≈3.5kg

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

5. Parameter & Operating Features

• Core control parameters (speed loop gain, position loop gain, analog input scaling value) are factory write-protected & locked for Y105 OEM setting, cannot be edited via front panel keypad; only partial auxiliary parameters adjustable

• Pre-calibrated to original machine’s mechanical characteristic; jog function available for no-load motor test after power-up

• Front single-digit LED displays standby status when no fault occurs

6. Built-in Protection & Standard Fault Codes

• 1: Overcurrent failure

• 2: Abnormal input power voltage

• A: Encoder cable open-circuit

• F: Drive internal overheat protection

• C: Main control board malfunction

  Fault reset: Cut off main power ≥30s after troubleshooting before restarting equipment

7. Replacement & Substitution Instructions

1. Only identical CACR-SR03AB2ER-Y105 supports direct plug-and-play replacement

2. Standard CACR-SR03AB2ER (without Y105 suffix): Requires full CN1 rewiring + complete parameter rewrite to substitute; cannot direct swap

3. Other Y-suffix variants (Y1/Y3/Y82): Different CN1 definition & locked parameters, full wiring rearrangement and OEM parameter setting required for replacement

8. Application Range