1. General Information

2. Specifications

• Control Axes: Up to 12 axes (vs. 9 axes on YBK01)

• Power Supply: DC 24 V ±10% (brake power input)

• On-Board Fuse: F1 = 5 A / 250 V (higher than YBK01’s 3 A)

• Max Output Current: Per axis ≤1.5 A (relay-driven, higher than YBK01)

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: -20 °C to +70 °C

• Humidity: 30%–85% RH (non-condensing)

• Dimensions (W×H×D): Approx. 154 × 284 × 30 mm

• Weight: Approx. 0.85 kg

• Mounting: Standard slot on JANCD-YBB01/YBB02 backplane

3. On-Board Connectors & Layout

• CN400: Brake Output (12 axes) → Motor brake cables

• CN402: Contactor Interlock Input → Safety interlock circuit

• CN403: Brake Power Input → DC24V (brake supply)

• CN404: External Power Switch → For brake power source selection

• CN405: Brake Command Input → From main axis board (EAXA21)

• F1: 5 A / 250 V fuse (brake circuit protection)

• Relays: 12× high-reliability brake relays (one per axis)

• LEDs (Front Edge):

  • PWR: DC24V power OK

  • BRK: Brake active (engaged)

  • FLT: Fault (overcurrent/short)

4. Safety Precautions

• Disconnect main power before installation/removal; wait 15 minutes for capacitor discharge—electric shock hazard.

• Never release brakes without mechanical support (axes will drop under gravity—crush hazard).

• Do not connect/disconnect brake cables while power is ON.

• Ensure low-resistance grounding (<0.1 Ω) for board and cabinet.

• Keep away from water, oil mist, dust, and direct sunlight.

• Replace only with JANCD-YBK21-3E; do not substitute YBK01 or other models.

• Do not bend, drop, or over-tighten mounting screws—PCB cracking risk.

• Clean only with a dry lint-free cloth; avoid contact with gold connectors.

5. Installation Procedure

1. Power OFF: Turn off controller main power; wait 15 minutes.

2. Cabinet Access: Open front door; locate vacant I/O slot on YBB01/YBB02 backplane.

3. Board Insertion:

   • Align YBK21-3E with slot guides.

   • Push firmly until fully seated (latch clicks into place).

4. Cable Connection:

   • CN400 → Motor brake cables (12 axes max).

   • CN403 → DC24V brake power supply.

   • CN405 → Brake command cable from EAXA21 axis board.

   • CN402 → Safety contactor interlock signal.

5. Close Cabinet: Secure front door; restore main power.

6. Verification: Check PWR LED (ON); test brake operation via teach pendant.

6. Replacement Instructions

1. Backup Data: Save all programs, parameters, and system data to CF card.

2. Power OFF: Disconnect main power; wait 15 minutes.

3. Disconnect Cables: Unplug CN400, CN402, CN403, CN404, CN405.

4. Remove Old Board: Release latch; pull board straight out (avoid twisting).

5. Install New Board: Follow Section 5 steps 3–4.

6. Reconnect Cables: Verify pin assignment matches labels.

7. Power ON & Test: Check LEDs; perform brake ON/OFF test for all axes.

7. Troubleshooting

Brakes Will Not Release

• Check CN403 DC24V input (24V ±10%).

• Verify F1 fuse continuity (5 A).

• Confirm CN405 brake command signal from EAXA21.

• Inspect CN400 cables for looseness or damage.

Brakes Will Not Engage (Axis Drifts)

• Verify CN402 interlock signal is closed (safety circuit active).

• Check for stuck relays on YBK21-3E.

• Test brake coils for short circuits.

FLT LED ON (Fault)

• Inspect brake wiring for short circuits (most common cause).

• Check for overcurrent on any axis brake coil.

• Replace YBK21-3E if internal relay damage is confirmed.

8. Maintenance

• 6-Month Inspection: Check connector tightness, fuse condition, and dust buildup.

• Cleaning: Use dry lint-free cloth; avoid touching relay contacts.

• Connector Care: Clean with contact cleaner if oxidation occurs.

• Replacement Life: 5–8 years (or immediately if burned, corroded, or relays fail).

9. Compatibility

• Fully Compatible: DX200 with YBB01/YBB02 backplanes.

• Limited Compatibility: DX100/NX200 (requires firmware update and slot reconfiguration).

• Not Compatible: YBK01 cannot replace YBK21-3E (axis count/current rating differences).

10. Disclaimer