The Q62P is Mitsubishi Electric’s 6 A 5 VDC power supply module for MELSEC-Q series base units — providing the 5 VDC internal bus power for all modules installed in the Q-series base unit from a 100–240 VAC wide-range input, the mid-range capacity power supply in the Q-series power supply module range designed for MELSEC-Q systems with moderate module loading requiring more than the 3 A Q61P capacity but not the full 8.5 A Q63P capacity. The Q62P is available through Atlantech Drives — quote within 24-48 hours, worldwide express shipping, 12-month warranty.
What Is the Q62P?
The Q62P is a MELSEC-Q series power supply module providing 6 A of 5 VDC bus power for the modules installed in a Q-series main base unit (Q3□B, Q5□B, Q6□B) from a 100–240 VAC single-phase input. The Q-series power supply module installs in the dedicated power supply slot (the leftmost slot, before slot 0) of all Q-series main base units — the power supply module position is fixed and cannot be installed in any other slot. The Q62P’s 6 A 5 VDC output powers the MELSEC-Q CPU module, I/O modules, and intelligent function modules installed in the same base unit via the internal bus — the total 5 VDC current consumption of all installed modules must not exceed the Q62P’s 6 A rated output. Each MELSEC-Q module specification includes its 5 VDC internal bus current consumption — sum all module current consumptions (CPU + all I/O and intelligent modules) and verify the total is below 6 A before specifying the Q62P. The Q62P also provides a 24 VDC 0.6 A sensor supply output terminal for powering connected sensors and transducers from the same power supply module, eliminating the need for a separate 24 VDC power supply for light sensor loads in smaller MELSEC-Q systems.
Key Technical Specifications
- Model: Q62P
- Input Voltage: 100–240 VAC, 50/60 Hz (wide range)
- Input Current: 3.5 A maximum at 100 VAC
- Output Voltage: 5 VDC ±1%
- Output Current (5 VDC): 6 A maximum
- 24 VDC Sensor Supply Output: 0.6 A maximum
- Inrush Current: ≤30 A (at cold start, 100 VAC)
- Efficiency: Approx. 70% at rated output
- Power Consumption: Approx. 34 W at rated output
- Compatible Base Units: Q3□B, Q5□B, Q6□B, Q3DB (power supply slot only)
- Protection: Overcurrent, overvoltage, undervoltage
- Operating Temperature: 0°C to 55°C
- Dimensions (W × H × D): 27.4 mm × 98 mm × 89.3 mm
- Weight: Approx. 0.25 kg
Series Comparison & Selection Guide
The MELSEC-Q power supply module range for standard Q-series base units includes three current capacity options: the Q61P (3 A, 5 VDC), the Q62P (6 A, 5 VDC), and the Q63P (8.5 A, 5 VDC). All three modules accept the same 100–240 VAC wide-range input and provide the same 24 VDC sensor supply output — the selection is determined entirely by the total 5 VDC current consumption of all modules installed in the base unit. For a typical Q02UCPU-based system with 8 I/O modules (QX80 input + QY40P output) in a Q68B 8-slot base unit, the total 5 VDC consumption is approximately: Q02UCPU (0.52 A) + 4 × QX80 (4 × 0.09 A = 0.36 A) + 4 × QY40P (4 × 0.09 A = 0.36 A) = approximately 1.24 A — well within the Q61P’s 3 A capacity. Adding intelligent function modules (QJ71E71-100 Ethernet at 0.55 A, QD75MH4 positioning at 0.75 A, QJ71PB92D PROFIBUS at 0.54 A) increases the total bus current consumption significantly — for a Q-series system with 3–4 intelligent function modules and 4–6 I/O modules, the total 5 VDC consumption typically falls in the 3–5 A range, making the Q62P the appropriate selection. Systems with 5+ intelligent function modules, motion CPUs (Q172DSCPU at 1.3 A), or multiple high-current modules may require the Q63P (8.5 A) — always calculate the exact module current sum before finalising power supply selection. Note that when a Q-series extension base unit is used, the extension base unit requires its own separate power supply module (Q61P, Q62P, or Q63P) — the main base unit power supply does not power extension base modules.
Maintenance Tips
The Q62P’s switching power supply has a rated service life of approximately 10 years at 40°C ambient — the electrolytic capacitors in the power supply’s output filter circuits are the primary age-limited component. In MELSEC-Q systems approaching 10 years of service, proactive Q62P replacement or factory refurbishment during a planned maintenance window eliminates the risk of sudden power supply failure causing complete system shutdown. Early indicators of Q62P capacitor degradation include: increasing output voltage ripple visible as output voltage fluctuation on a voltmeter (normal 5 VDC ripple is <50 mV; degraded capacitors may show 100–200 mV ripple), unexplained CPU warm restarts under heavy module loading, and I/O module communication errors that improve temporarily after power cycling (suggesting momentary bus voltage sag during high-load cycles). For MELSEC-Q systems in high-temperature environments (above 40°C ambient), the Q62P's capacitor life is reduced proportionally — check the derating curve in the Q62P instruction manual for the allowable service life at elevated ambient temperatures. The Q62P does not include a battery — MELSEC-Q program memory and device retention are managed by the CPU module's battery (Q6BAT or Q7BAT), not the power supply module. Do not confuse Q62P power supply maintenance with CPU battery replacement — both are required on separate schedules.
Frequently Asked Questions
Q: What happens if the total 5 VDC current consumption of installed modules exceeds the Q62P’s 6 A rating?
A: If the total module 5 VDC consumption exceeds 6 A, the Q62P’s overcurrent protection circuit activates — the power supply shuts down and the POWER LED extinguishes or flashes, causing a complete system shutdown. The Q62P does not reduce output voltage proportionally with overload (it does not droop under overload) — it shuts off completely to protect the power supply and modules from damage. If this condition occurs, calculate the total module current consumption accurately and replace the Q62P with the Q63P (8.5 A) or reduce the installed module count to bring the total below 6 A.
Q: Can the Q62P be replaced with the Q63P in an existing MELSEC-Q system without any other changes?
A: Yes. The Q62P and Q63P are physically identical in size (27.4 mm × 98 mm × 89.3 mm) and use the same power supply slot connector in Q-series base units — the Q63P is a direct drop-in replacement for the Q62P providing additional 5 VDC current capacity (8.5 A versus 6 A). No software configuration changes are required for power supply module substitution. The upgrade from Q62P to Q63P should be performed with the system powered down to avoid interrupting the 5 VDC bus during module exchange.
Q: Does the Q62P’s 24 VDC sensor supply output provide adequate current for all connected Q-series module sensor supplies?
A: The Q62P’s 24 VDC sensor supply output is rated at 0.6 A maximum — appropriate for powering the sensors connected to a few QX80 input modules (each QX80 draws approximately 4 mA per active sensor × 32 inputs = up to 128 mA from the sensor supply). For systems with many QX80 modules and numerous 3-wire sensors, calculate the total sensor supply current demand and verify it is below 0.6 A. For sensor loads exceeding 0.6 A, a separate external 24 VDC power supply is required for sensor power — the Q62P sensor supply should not be overloaded, as overcurrent on the sensor supply output may affect the Q62P’s 5 VDC main output regulation.
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