1. Model Code Definition

2. Main Electrical Ratings

• Input Power: Single/Three-phase AC200V~230V, tolerance +10%/-15%, 50/60Hz

• Rated Continuous Output Current: 3.0Arms; Peak Overload Current: 8.5Arms

• Matching Servo Motor: Yaskawa USAF-03 / USAM-03 300W AC servo with 4000PPR incremental encoder, 1500PPR encoder motors unavailable under factory preset Y338 parameters

• Control Mode: 3 closed-loop regulation (Current Loop + Speed Loop + Position Loop); default differential pulse position instruction, ±10VDC analog speed input available per Y338 custom firmware setting

• Output: IGBT sine-wave PWM 3-phase AC output for motor U/V/W terminals

3. Terminal & Connector Specification

Main Power Terminals

• R, S: Main AC power input terminals; spare terminals reserved for external dynamic braking resistor wiring

• U, V, W: 3-phase power output to servo motor stator windings

Control Connectors

• CN1 (50Pin): Unique Y338 customized pin definition for servo enable, drive ready feedback, fault alarm output, CNC interlock & machine safety signals; pin layout totally different from standard BB1AF and other Y-suffix variants(Y110/Y114)

• CN2 (20Pin): Dedicated encoder feedback port, fixed wiring for 4000PPR incremental encoder only

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 Class: IP20 (must install inside electrical cabinet, forbidden open-air mounting)

• Cooling: Natural convection air cooling; Net Weight ≈2.9~3.0kg

5. Exclusive Y338 Customized Features

1. Core parameters (speed/position loop gain, electronic gear ratio) write-protected by factory firmware, no modification accessible via front panel button; only minor auxiliary parameters adjustable

2. I/O signal logic (enable active level, alarm output polarity, ready signal definition) pre-programmed for dedicated original machine tool, inconsistent with standard BB1AF/Y110/Y114 specification

3. Manual jog operation and free command source switching function locked, cannot enable without factory firmware modification

4. Original application: Feed axis servo driver for special customized Yasnac VS-800 CNC lathe & small vertical machining center

6. Protection Functions & Fault Alarm Code List

Reset Rule: Cut off main AC supply for minimum 30 seconds after fault troubleshooting before power restart

7. Replacement Regulation

1. Only identical CACR-SR03BB1AF-Y338 supports plug-and-play direct replacement

2. Standard non-Y suffix CACR-SR03BB1AF or other Y customized models(Y110/Y114) cannot substitute directly; full CN1 rewiring + complete parameter rewrite required for alternative replacement

8. Standard Power-On & Shutdown Operation Steps

1. Pre-check before power-up: Confirm R/S power wiring, U/V/W motor wiring, CN2 encoder wiring no short-circuit/open-circuit

2. Power-on sequence: Turn on CNC cabinet control power first, then servo main AC input power

3. Normal standby: 7-segment display shows steady standby digit without alarm codes

4. Shutdown sequence: Cut servo main power first, then CNC host control power