I. Basic Information

Model: JANCD-GRS01 (often mistakenly written as GSR01)

Brand: Yaskawa (Yaskawa)

Origin: Japan

Type: I/O and Communication Expansion Board (Interface Board)

Compatible System: YASNAC 2000G / 3000G CNC

Main Control Board: GMM11/GMM12/GMM22 (Universal Type)

Board Form: Full-length industrial board, Slot 3 slot (GMR occupies Slot 2)

Original Part Number: DE6428680

Status: Discontinued (OUT OF STOCK), only second-hand / refurbished items are available for circulation

II. Core Functions (Different from GMR Series)

✅ System Bus Bridging: Connects GMM main control with external I/O and communication devices

✅ General I/O Expansion: Provides 16 input / 16 output digital signals (24V), suitable for machine peripheral signals

✅ Communication Interface: Standard RS-232C (DNC), optional Ethernet (TCP/IP) expansion

✅ Panel Signal Conversion: MDI keyboard, operation panel emergency stop / mode signal conversion

❌ No Graphic Processing Capability: Not responsible for display (display is handled by GMR22/GMR24)

III. Hardware Specifications

Power Supply: Backplane DC5V, approximately 12W (lower than GMR series)

I/O Specifications: 16 input (NPN/PNP compatible), 16 output (transistors, 0.5A / channel)

Communication Rate: RS-232C up to 19.2kbps; Ethernet 10/100Mbps (optional)

Temperature: Working 0℃~+55℃; Storage -25℃~+85℃

Weight: Approximately 1.16kg

IV. Interface Definitions (CN1~CN4)

CN1: System Bus → Connects GMM main control (data / power)

CN2: I/O Terminal → 16 input / 16 output (24V, machine peripheral)

CN3: RS-232C → DNC communication, program upload / download

CN4: Expansion Slot → Optional Ethernet module (such as JANCD-NET01) Indicator light

PWR: Power Supply Normal (Always On)

RUN: System Running (1Hz Blinking)

ALM: I/O/Communication Alarm (Always On)

VII. Pairing and Alternatives

Required: GMM Main Controller + GMR Graphics Card + GRS01 I/O Board (Standard Configuration: 2000G/3000G)

Alternative: JANCD-GRS01 → No direct alternative model. The entire set needs to be replaced with YASNAC i80 system (Modern alternative solution)

VI. Differences from GMR22/GMR24 Core

GRS01: I/O + Communication, No Display, Slot3, 12W, General Type

GMR22: 2D Graphics, 640×480, Slot2, 18W, Equipped with GMM11/12

GMR24: 3D Graphics, 1024×768, Slot2, 25W, Equipped with GMM22

VII. Common Faults

No I/O Response: CN1 Loosening, Backplane DC5V Abnormality, Output Terminal Short Circuit

Communication Failure: CN3 Serial Port Damaged, Baud Rate Mismatch, GMM Firmware Version Too Low

ALM Always On: I/O Overload, External 24V Power Supply Failure, Board Aging