Implementing 3-Switch XOR Ladder Logic with Internal Bit
Implement a 3-SPST switch XOR light circuit in LogixPro or RSLogix 500 using an internal relay bit. Includes truth tables, boolean equations, and verified.
Providing high-dynamic positioning in compact industrial automation architectures, the Mitsubishi Electric HG-MR43B is an ultra-low inertia AC servo motor engineered specifically for high-duty cycle applications. Integrating an advanced electromagnetic holding brake, this motor ensures immediate load-locking and position preservation during power-down states or emergency stops. By pairing an ultra-low rotor inertia core with a high-resolution absolute feedback system, this unit delivers exceptional acceleration profiles, minimal thermal dissipation, and micro-precision motion synchronization when driven by compatible MELSERVO MR-J4 servo amplifiers.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Identifier | HG-MR43B |
| Motor Series | HG-MR (Ultra-Low Inertia, Small Capacity) |
| Rated Output Power | 0.4 kW (400 W) |
| Rated Rotational Speed | 3000 r/min |
| Maximum Rotational Speed | 6000 r/min |
| Rated Continuous Torque | 1.3 N-m |
| Electromagnetic Brake | Yes (Holding type) |
| Brake Rated Voltage | 24 VDC (+0% / -10%) |
| Feedback Encoder Resolution | 22-bit (4,194,304 pulses/rev) absolute / incremental |
| Ingress Protection Class | IP65 (excluding shaft-through portion) |
| Country of Origin | Japan |
| Shipping Weight (Calculated) | 3.0 kg |
| Package Dimensions (Calculated) | 210 mm x 150 mm x 120 mm |
| Connector Pin | Function / Circuit Assignment |
|---|---|
| Power Pin U | Phase U motor excitation input |
| Power Pin V | Phase V motor excitation input |
| Power Pin W | Phase W motor excitation input |
| Ground (PE) | Protective earth grounding terminal (housing link) |
| Brake Pin B1 / B2 | 24 VDC polarity-independent holding brake activation input |
This model serves as the physical and electrical successor to the older HF-KP43B series. While physical mounting dimensions (flange size and pilot diameter) remain identical to ease mechanical retrofits, the encoder feedback architecture is fundamentally upgraded to 22-bit serial communication. Because of this, it must be paired with MR-J4 series amplifiers. Attempting to run this motor on older MR-J3 amplifiers will cause initialization and encoder serial communication handshake faults.
The integrated electromagnetic brake is strictly a holding brake and must never be utilized for dynamic braking or load deceleration during operation. Forcing the electromagnetic brake to absorb rotational kinetic energy will rapidly glaze the internal friction plates, causing permanent loss of holding torque. Standard configuration must reserve brake activation for zero-speed scenarios or power outages.
To eliminate high-frequency electromagnetic interference (EMI) from inducing feedback tracking errors (such as AL 37 or AL 50 on the drive), ensure the encoder cable shield is clamped to the servo amplifier ground plate. Do not route the encoder feedback line immediately parallel to high-power AC lines; a minimum separation of 100 mm is recommended unless adequate metallic conduit segregation is established.
Ensure primary three-phase power feed to the servo amplifier is completely isolated and verified de-energized prior to terminal access. Discharge capacitors on the DC bus link by waiting at least 15 minutes post-power isolation before conducting resistance tests on motor stator windings.
Global Express Shipping
Returns & Warranty

Providing high-dynamic positioning in compact industrial automation architectures, the Mitsubishi Electric HG-MR43B is an ultra-low inertia AC servo motor engineered specifically for high-duty cycle applications. Integrating an advanced electromagnetic holding brake, this motor ensures immediate load-locking and position preservation during power-down states or emergency stops. By pairing an ultra-low rotor inertia core with a high-resolution absolute feedback system, this unit delivers exceptional acceleration profiles, minimal thermal dissipation, and micro-precision motion synchronization when driven by compatible MELSERVO MR-J4 servo amplifiers.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Identifier | HG-MR43B |
| Motor Series | HG-MR (Ultra-Low Inertia, Small Capacity) |
| Rated Output Power | 0.4 kW (400 W) |
| Rated Rotational Speed | 3000 r/min |
| Maximum Rotational Speed | 6000 r/min |
| Rated Continuous Torque | 1.3 N-m |
| Electromagnetic Brake | Yes (Holding type) |
| Brake Rated Voltage | 24 VDC (+0% / -10%) |
| Feedback Encoder Resolution | 22-bit (4,194,304 pulses/rev) absolute / incremental |
| Ingress Protection Class | IP65 (excluding shaft-through portion) |
| Country of Origin | Japan |
| Shipping Weight (Calculated) | 3.0 kg |
| Package Dimensions (Calculated) | 210 mm x 150 mm x 120 mm |
| Connector Pin | Function / Circuit Assignment |
|---|---|
| Power Pin U | Phase U motor excitation input |
| Power Pin V | Phase V motor excitation input |
| Power Pin W | Phase W motor excitation input |
| Ground (PE) | Protective earth grounding terminal (housing link) |
| Brake Pin B1 / B2 | 24 VDC polarity-independent holding brake activation input |
This model serves as the physical and electrical successor to the older HF-KP43B series. While physical mounting dimensions (flange size and pilot diameter) remain identical to ease mechanical retrofits, the encoder feedback architecture is fundamentally upgraded to 22-bit serial communication. Because of this, it must be paired with MR-J4 series amplifiers. Attempting to run this motor on older MR-J3 amplifiers will cause initialization and encoder serial communication handshake faults.
The integrated electromagnetic brake is strictly a holding brake and must never be utilized for dynamic braking or load deceleration during operation. Forcing the electromagnetic brake to absorb rotational kinetic energy will rapidly glaze the internal friction plates, causing permanent loss of holding torque. Standard configuration must reserve brake activation for zero-speed scenarios or power outages.
To eliminate high-frequency electromagnetic interference (EMI) from inducing feedback tracking errors (such as AL 37 or AL 50 on the drive), ensure the encoder cable shield is clamped to the servo amplifier ground plate. Do not route the encoder feedback line immediately parallel to high-power AC lines; a minimum separation of 100 mm is recommended unless adequate metallic conduit segregation is established.
Ensure primary three-phase power feed to the servo amplifier is completely isolated and verified de-energized prior to terminal access. Discharge capacitors on the DC bus link by waiting at least 15 minutes post-power isolation before conducting resistance tests on motor stator windings.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|