The Q63P is a 5 V DC / 6 A power supply module from Mitsubishi Electric for the MELSEC-Q series, providing the internal bus supply voltage for Q series main base units and their installed CPU and I/O modules. Atlantech Drives holds stock of the Q63P. Contact us for fast worldwide delivery and competitive pricing.
What Is the Mitsubishi Q63P?
The Q63P is a dedicated power supply module that occupies the leftmost slot of a MELSEC-Q main base unit and converts the AC or DC input supply into the regulated 5 V DC internal bus voltage required by all Q series CPU, I/O, and intelligent function modules. The Q63P provides a rated output current of 6 A at 5 V DC — 30 W of internal bus power — making it the mid-range option in the Q series PSU lineup, positioned above the Q61P (3 A) and below the Q64P (8.5 A). Input voltage is 100–240 V AC, accepted without manual range selection. The Q63P includes built-in overcurrent and overvoltage protection, and provides a POWER LED and an ERR LED for local status indication, with power supply fault status accessible by the CPU via the special relay (SM0) for integration into alarm logic.
Key Technical Specifications
- Output voltage: 5 V DC
- Rated output current: 6 A
- Rated output power: 30 W
- Input voltage: 100–240 V AC, 50/60 Hz (auto-ranging)
- Input current: 0.6 A max (at 100 V AC, full load)
- Inrush current: 20 A max (at 100 V AC)
- External 24V DC output: Not provided (see Q62P for 24V service output)
- Protection functions: Overcurrent protection, overvoltage protection
- Status indication: POWER LED (green), ERR LED (red)
- Compatible base units: Q3□B, Q5□B, Q6□B main base units
- Power consumption (self): Approx. 15 W at full load
- Operating temperature: 0 to 55°C
- Dimensions (W × H × D): 27.4 × 98 × 90 mm
Compatibility & System Integration
The Q63P is compatible with all standard MELSEC-Q main base units: Q33B (3 slots), Q35B (5 slots), Q38B (8 slots), and Q312B (12 slots), as well as their -S□ slim variants. It is not compatible with extension base units — extension bases (Q65B, Q68B, Q612B) draw their 5 V supply from the main base via the extension cable and do not accept a PSU module. When selecting the Q63P for a specific system, the critical check is whether the 6 A / 30 W output capacity covers the total internal current consumption of all modules installed in the base. Calculate the sum of the 5 V DC current consumption figures from each module’s datasheet — if the total exceeds 6 A, specify the Q64P (8.5 A) instead. Current consumption values for all Q series modules are tabulated in the MELSEC-Q Module Configuration Manual. The Q63P does not provide an external 24 V DC service output — if 24 V DC for field sensors must be derived from the PLC power supply, specify the Q62P (5A 5V + 0.6A 24V) or supply 24 V DC from a separate DIN rail PSU, which is the recommended practice for systems with significant sensor current demand.
Maintenance Tips
- The Q63P does not contain a replaceable fuse accessible from the front — overcurrent protection is electronic. If the ERR LED illuminates and the POWER LED extinguishes simultaneously, the most likely cause is a sustained overcurrent condition (module short circuit or total 5 V load exceeding 6 A). Remove modules one at a time to identify the faulty module before restoring power.
- The Q63P’s internal electrolytic capacitors have a design life of approximately 10 years at 40°C continuous operation. In high-ambient-temperature panel environments (above 45°C), proactive PSU replacement at 7–8 year intervals is advisable to avoid unplanned downtime from capacitor degradation — capacitor failure in a PLC power supply is typically sudden and causes complete system shutdown.
- When replacing a Q63P in a running system, always power down the complete MELSEC-Q base before removing the PSU module — unlike some Q series modules that support online module change, the power supply module does not support hot-swap and removal under power will immediately shut down all modules in the base.
- After replacing the Q63P, verify the POWER LED illuminates solid green within 2 seconds of applying input power. A flashing POWER LED indicates the output voltage has not reached the regulated 5 V level — check input supply voltage at the L and N terminals before suspecting a faulty replacement module.
Frequently Asked Questions
Q: How do I determine whether the Q63P has sufficient capacity for my MELSEC-Q system?
A: Sum the 5 V DC internal current consumption values for every module installed in the base — CPU, I/O modules, intelligent function modules, and network modules. This data is in each module’s hardware manual under «Power Consumption» or in the MELSEC-Q Module Configuration Manual consolidated table. If the total is below 6.0 A, the Q63P is sufficient. If it exceeds 6.0 A, specify the Q64P (8.5 A).
Q: Can the Q63P be used with a DC input supply instead of AC?
A: No. The Q63P is an AC input power supply module only. For DC input supply (24 V DC or 48 V DC), Mitsubishi offers the Q61P-D (24 V DC input) power supply module. Verify the input supply type before specifying the PSU model.
Q: Is the Q63P interchangeable with the Q62P?
A: They are physically interchangeable (same form factor and slot position), but electrically different. The Q62P provides 5 A at 5 V DC plus 0.6 A at 24 V DC; the Q63P provides 6 A at 5 V DC with no 24 V output. If the system relies on the Q62P’s 24 V DC service output for field devices, substituting a Q63P will remove that supply and must be compensated by an external 24 V DC source.
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