The QY10R is Mitsubishi Electric’s 16-point relay output module for the MELSEC-Q programmable controller series, providing electrically isolated relay contacts capable of switching both AC and DC loads up to 240 VAC or 24 VDC at 2 A per point — making it the preferred output module for applications requiring voltage-independent load switching, direct interface with 110 VAC or 230 VAC actuators, or galvanic isolation between the PLC output circuit and the load circuit. Unlike transistor output modules, the QY10R’s relay contacts switch load current without requiring a separate load power supply polarity match, enabling direct control of AC contactors, solenoid valves, indicator lamps, and motor starters from a single output module. In stock at Atlantech Drives. Request your quote within 24-48 hours with worldwide shipping and 12-month warranty.
What Is the QY10R?
The QY10R is a MELSEC-Q series relay output module providing 16 independent relay contact outputs, each with its own isolated contact and rated at 2 A at 240 VAC or 24 VDC. The relay contacts are form A (normally open) type, closing when the corresponding Y output bit in the CPU program is set to ON. Each relay is independently isolated — there is no shared common between output points, meaning each output can switch a different voltage level or circuit type simultaneously without cross-interference. This independent isolation architecture makes the QY10R uniquely suited for applications where outputs must control devices at different voltages within the same module, such as a mix of 24 VDC solenoid valves, 110 VAC indicator lights, and 230 VAC contactor coils. The relay contact life rating is 200,000 operations at rated load, which determines the maintenance replacement interval in high-cycle applications.
Key Technical Specifications
- Model: QY10R
- Output Points: 16
- Output Type: Relay contact (Form A, normally open)
- Rated Load Voltage: 240 VAC / 24 VDC maximum
- Rated Load Current: 2 A per point
- Minimum Load Current: 10 mA at 5 VDC (for reliable contact operation)
- Contact Isolation: Independent per point (no shared common)
- Electrical Life: 200,000 operations at rated resistive load
- Mechanical Life: 20,000,000 operations (no load)
- Output Response Time: 10 ms ON, 12 ms OFF (relay operate/release time)
- Connector Type: 40-pin FCN connector
- Current Consumption (5 VDC internal bus): 0.16 A
- Operating Temperature: 0°C to 55°C
- Weight: Approx. 0.28 kg
Compatibility & System Integration
The QY10R is compatible with all MELSEC-Q main and extension base units and all MELSEC-Q CPU modules. In GX Works2, the module’s 16 output points are mapped to the Y device area based on slot position, with no special configuration required for standard relay output operation. For applications requiring suppression of inductive load switching transients (relay coil flyback, solenoid valve kickback), Mitsubishi recommends installing RC snubber circuits or varistors across each inductive load externally — the QY10R’s relay contacts do not include integrated arc suppression, and inductive loads without suppression will significantly reduce contact life below the rated 200,000 operations. The QY10R can be used alongside transistor output modules (QY41P, QY40P) in the same base unit, with relay outputs assigned to AC or high-voltage loads and transistor outputs assigned to 24 VDC loads requiring faster switching response. For applications using the QY10R to control 230 VAC contactor coils in a safety-related circuit, note that the QY10R is a standard (non-safety-rated) output module — for SIL2 or PLd safety functions, a dedicated safety output module must be used.
Maintenance Tips
The QY10R’s relay contacts are the only wear component in the module and determine its service life. In high-cycle applications (outputs switching more than 10 times per minute continuously), calculate the expected number of switching operations per year and plan preventive module replacement before the 200,000-operation contact life is reached — relay contact failure in a high-cycle application typically manifests as increased contact resistance, causing load undervoltage before progressing to complete contact failure. Monitor output circuit voltage with a multimeter periodically in high-cycle installations: a healthy relay contact at 2 A resistive load should show less than 0.5 V drop across the closed contact. If the voltage drop exceeds 1.0 V on any point, that relay contact is approaching end of life and the module should be scheduled for replacement. For modules controlling inductive loads (contactors, solenoid valves, motor starters), fitting RC snubbers or metal oxide varistors (MOVs) across each load will extend contact life by a factor of 3 to 5 compared to unprotected inductive switching — this is the single most effective maintenance measure for relay output modules in industrial control applications.
Frequently Asked Questions
Q: Can the QY10R switch 110 VAC and 230 VAC loads from the same module simultaneously?
A: Yes. Because each of the QY10R’s 16 relay contacts is independently isolated with no shared common, different output points can switch different voltages simultaneously. Points 0–7 could control 110 VAC loads while points 8–15 control 230 VAC loads, or any combination, without interference between circuits. This is a key advantage of independently isolated relay outputs over transistor output modules, which share a common load power supply terminal.
Q: What is the recommended replacement for the QY10R when faster output switching is required?
A: If switching speed is a priority and all loads are 24 VDC, the QY41P (16-point transistor sink output, 0.1 A per point, 1 ms response) is the recommended alternative. For 24 VDC loads requiring higher current per point (up to 0.5 A), the QY40P is appropriate. Neither transistor module can switch AC loads directly — if AC load switching is required at higher speed than the QY10R’s 10 ms relay response, an external solid-state relay (SSR) driven by a 24 VDC transistor output module should be used.
Q: How do I identify which relay contacts have reached end of life in a QY10R module without replacing the entire module?
A: Use GX Works2’s device monitor to force each Y output ON individually while measuring the voltage drop across the corresponding load circuit with a multimeter. A contact with less than 0.5 V drop at rated current is healthy; 0.5–1.0 V indicates wear; above 1.0 V indicates the contact should be replaced. Since individual relay replacement within the module is not practical in most maintenance environments, the module should be replaced as a unit when any contact shows excessive voltage drop.
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