Honeywell 2MLQ-RY2A 16-Point Relay Output Module

Product Overview

The Honeywell 2MLQ-RY2A is a 16-point relay output module for the MasterLogic-200 (ML200) PLC system. Each point features an independent Form A (SPST-NO) relay contact rated at 2A per point with a common capacity of 5A per COM terminal. It is the ideal choice for switching AC or DC loads of varying voltages — from 24V DC solenoids to 220V AC contactor coils — within a single module, eliminating the need for external interposing relays in mixed-voltage applications.

Key Specifications

• Product Type: 16-Point Relay Output Module
• Series: MasterLogic-200 / ML200
• Output Points: 16
• Output Type: Relay (SPST-NO)
• Rated Load Voltage: DC 24V / AC 220V (max)
• Rated Load Current: 2A per point (resistive)
• Common Current: 5A per COM terminal
• Minimum Load: DC 5V, 1 mA
• Response Time: ≤ 10 ms (ON→OFF / OFF→ON)
• Mechanical Life: 20,000,000 operations
• Electrical Life: 100,000 operations (rated load)
• Isolation Method: Relay isolation (coil to contact)
• Isolation Voltage: AC 1,500V rms / 1 minute
• External Connection: 40-point connector
• Current Consumption: 70 mA (from 5V internal bus)
• Dimensions (W x H x D): 27.4 mm x 90 mm x 70 mm
• Weight: Approx. 120 g
• Operating Temperature: 0°C to +55°C

Features & Benefits

• Universal AC/DC switching — relay contacts handle both AC and DC loads from 5V to 220V, eliminating the need for separate AC and DC output modules
• 16-point high density — compact 27.4 mm width delivers 16 independent relay outputs, reducing module count and panel footprint
• 5A common capacity — each COM terminal supports up to 5A, enabling grouped load switching for solenoid valve manifolds and contactor banks
• 20 million mechanical operations — long relay life reduces maintenance frequency in high-cycling applications such as packaging and sorting
• 1,500V AC isolation — galvanic separation between PLC logic and field power protects the CPU from voltage transients and ground faults

Typical Applications

• Contactor and motor starter coil control in MCC panels
• Solenoid valve manifold switching in pneumatic systems
• Heater and lighting circuit control in building automation
• Alarm horn and strobe activation in safety systems
• Conveyor diverter gate and stopper cylinder control
• Mixed-voltage systems with both 24V DC and 110/220V AC loads

Installation Guide

1. Verify load ratings — confirm each load is ≤2A resistive and the total per COM group is ≤5A.
2. Install on de-energized base — align the module and press firmly until the retention clips engage.
3. Install surge suppressors for inductive loads — place RC snubbers or flyback diodes across solenoid coils and contactor coils to extend relay contact life.
4. Connect 40-pin field cable — use the Honeywell 40-point connector or terminal block adapter (TG7-1H40S) to wire loads.
5. Apply field power — connect the appropriate AC or DC supply to the COM terminals and wire loads to the output points.
6. Test each point — force each output ON via SoftMaster and verify the load energizes and the output LED illuminates.

FAQ

Q: What is the difference between 2MLQ-RY2A and 2MLQ-RY2B?
A: The 2MLQ-RY2B includes a built-in varistor for surge suppression on each output. The 2MLQ-RY2A requires external suppression. Choose RY2B for inductive load applications (solenoids, contactors) to reduce external component count.

Q: Can I switch motor loads directly?
A: No. The 2A rating is for resistive loads. Motor starting currents exceed this limit. Use the 2MLQ-RY2A to switch a contactor coil, which then controls the motor.

Q: What is the maximum voltage?
A: The relay contacts are rated for AC 250V / DC 30V maximum. Do not exceed these ratings — doing so will damage the relay and void the warranty.

Q: Can I mix AC and DC loads on the same module?
A: Yes. Each output is independent. You can switch DC loads on some points and AC loads on others, provided each point and COM group remains within rated current.

Selection Tips

• Choose 2MLQ-RY2A for general-purpose relay output with mixed AC/DC voltages.
• For inductive loads (solenoids, contactors), upgrade to 2MLQ-RY2B with built-in varistor protection.
• For high-speed switching (>1 Hz), use transistor output modules (2MLQ-TR2A for sink type or 2MLQ-TR2B for source type) instead of relays.
• Always install external fuses on each COM group to protect against short-circuit damage.