1. Model Code Breakdown

• CACR-SR: Vintage analog servo amplifier platform matched with Yasnac VS CNC system

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

• A: Standard main control PCB base specification

• C: Revised power & control circuit layout (optimized for heavy instantaneous load vs AB series)

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

• FU: Custom modified suffix; F=special encoder interface circuit, U=custom CN1 connector pinout + modified internal housing structure (instead of standard R type metal base)

2. Electrical Specifications

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

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

• Matching Servo Motor: Yaskawa USAM-03 / USAF-03 300W servo with 1500PPR incremental encoder (FU dedicated feedback circuit)

• Control Mode: Current+speed+position triple closed-loop; default differential pulse command input, analog speed input optional via parameter modification

3. Connector Definition

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

2. CN1 (50Pin control): FU exclusive customized pin assignment, different from AC1ER standard pin definition; unique wiring for pulse input, servo enable, ready output, fault alarm & machine interlock signal

3. CN2 (20Pin encoder port): Modified internal feedback circuit for FU variant, physical pinout same as SR03 series standard 1500PPR encoder connection

4. Environmental & Mechanical Data

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

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

• Protection grade:IP20 (cabinet mounting only); Net weight≈3.5kg

• Cooling: Natural convection cooling; housing structure modified per U-spec (non-standard ER/R enclosure size)

5. Parameter & Function Features

• All control parameters (loop gain, pulse scaling, filter value) fully unlockable, adjustable via front panel keypad (no OEM parameter lock like Yxx suffix customized drives)

• Supports jog test, no-load motor trial run, pulse/analog command mode switching via internal parameter setup

• Single-digit LED status/fault display on front panel

6. Protection & Standard Fault Codes

• 1: Overcurrent fault

• 2: Abnormal input supply voltage

• A: Encoder wire open circuit

• F: Internal overheat protection trigger

• C: Main control board failure

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

7. Compatibility & Replacement Rules

1. Direct plug-and-play only with identical CACR-SR03AC1FU unit

2. Cannot direct swap with CACR-SR03AC1ER: different CN1 pin definition + modified internal circuit; full CN1 rewiring + parameter calibration required for replacement

3. Incompatible with AB series (AB1ER/AB2ER/Y-suffix models): different command circuit and I/O logic, full wiring rearrangement mandatory

8. Application