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Product Overview
The Honeywell 2MLQ-SS2A is a 16-point triac digital output module designed for use in the MasterLogic-200 PLC system. It delivers reliable performance for AC load control with optical isolation and robust surge protection. This module is suitable for switching AC devices like solenoids, contactors, and signal lamps in industrial automation environments.
Technical Specifications
| Parameter | Description |
|---|---|
| Model Number | 2MLQ-SS2A |
| Output Points | 16 |
| Isolation Method | Photo-coupler isolation |
| Rated Load Voltage | AC 100–240V (50/60 Hz) |
| Max Load Voltage | AC 264V |
| Max Load Current | 0.6A per point, 4A per COM |
| Min Load Current | 20 mA |
| Off Leakage Current | 2.5 mA (AC 220V, 60Hz) |
| Max Inrush Current | ≤ 20A per cycle |
| Voltage Drop (ON) | ≤ AC 1.5V (at 2A) |
| Surge Protection | Varistor + C.R Absorber (IEC 61006-6-2 compliant) |
| Response Time (Off → On) | ≤ 1 ms |
| Response Time (On → Off) | ≤ 0.5 cycle + 1 ms |
| Current Consumption | 300 mA (when all points are ON) |
| Operation Indicator | Output ON LED |
| External Connection Method | 18-point terminal block connector (M3 x 6 screw) |
| Dimensions | 114 × 48 × 127 mm |
| Weight | 0.2 kg |
Applications
Used in automation systems requiring AC load switching, including:
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Industrial motor starter panels
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Solenoid actuators
-
Signal tower lamps
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HVAC systems
-
Building management systems
-
Material handling systems
Product Advantages
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High Reliability: Optical isolation provides excellent electrical separation between control signals and outputs.
-
Broad Compatibility: Supports standard AC 100–240V loads.
-
Enhanced Safety: Built-in surge absorber protects against electrical transients.
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Compact Design: Small footprint facilitates installation in dense control cabinets.
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User-Friendly: LED indicators simplify status monitoring.
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Robust Output: Handles up to 4A per COM, suitable for high-load AC applications.
Frequently Asked Questions (FAQ)
Q1: What type of load is the 2MLQ-SS2A suitable for?
A1: It is designed for resistive and inductive AC loads such as contactors, solenoids, and pilot lamps.
Q2: Is the output electrically isolated from the controller?
A2: Yes, it uses photo-coupler isolation to separate control logic from output circuits.
Q3: Can I use this module for DC loads?
A3: No, it is specifically designed for AC voltage loads.
Q4: What happens if the load current exceeds 0.6A per point?
A4: Exceeding rated current may damage the triac; protective devices like fuses should be used externally.
Q5: Does the module have built-in surge protection?
A5: Yes, it features a varistor and C.R absorber to suppress voltage spikes.
Q6: Can the module be hot-swapped?
A6: No, power should be removed before replacing or removing the module.
Q7: Is there LED indication for each output channel?
A7: Yes, an LED lights up when the respective output channel is active.
Q8: Can this module operate at 50Hz and 60Hz?
A8: Yes, it supports both 50Hz and 60Hz AC frequencies.
Q9: Is there any delay in switching OFF the load?
A9: Yes, the OFF response includes 0.5 cycle plus 1 ms delay.
Q10: Can the module be used in harsh industrial environments?
A10: Yes, but conformal coating is recommended for G2/G3 level environments.
Related or Same-Series Models
| Model Number | Description | Output Type | Points | Load Voltage | Weight |
|---|---|---|---|---|---|
| 2MLQ-RY1A | 8-point Relay Output Module | Relay | 8 | AC/DC | 0.13 kg |
| 2MLQ-RY2A | 16-point Relay Output Module | Relay | 16 | AC/DC | 0.17 kg |
| 2MLQ-RY2B | 16-point Relay Output (Surge Protected) | Relay | 16 | AC/DC | 0.19 kg |
| 2MLQ-TR2A | 16-point Transistor Output (Sink) | Transistor | 16 | DC | 0.11 kg |
| 2MLQ-TR4A | 32-point Transistor Output (Sink) | Transistor | 32 | DC | 0.10 kg |
| 2MLQ-TR8A | 64-point Transistor Output (Sink) | Transistor | 64 | DC | 0.15 kg |
Popular Honeywell Models
| Model Number | Description | Type | Channels | Dimensions (mm) | Weight |
|---|---|---|---|---|---|
| 8C-PAOHA1 | Analog Output with HART | Analog Output | 8 | 120 × 40 × 130 | 0.25 kg |
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| FC-IOCHAS-0001R | Chassis for Redundant I/O | Chassis | — | 260 × 80 × 140 | 1.10 kg |
