Product Details
The Honeywell 2MLR-AC12, also cataloged as the 2MLR-AC12 Power Module, operates as a dedicated hardware component for internal logic voltage regulation within MasterLogic-200 PLC systems. Configured to convert a nominal 110 VAC input to a regulated 5 VDC output rail at up to 5.5 A, it directly energizes backplane data buses and active rack slots.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 2MLR-AC12 |
| Brand | Honeywell |
| Origin | Industrial Standard Assembly |
| Weight | 0.326 kg |
| Dimensions | 5.5 x 9.5 x 9.0 cm |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | Output Power: 27.5 W at 55 deg C |
| Input Voltage Range | 85-132 VAC (110 VAC nominal), 47-63 Hz |
| Output Voltage | 5 VDC (+2%) |
| Output Current | 5.5 A (Overcurrent protection: 6.0 A to 13.0 A) |
| Inrush Current | 20 A peak (<8 ms) |
| Interruption Hold Time | <20 ms |
| Relay RUN Output | 24 VDC, 0.5 A (Min load: 5 VDC, 1 mA) |
Channel-to-Channel Isolation & DCS Signal Integrity
The 2MLR-AC12 features galvanically isolated power conversion stages to shield backplane logic communication from AC mains transients, noise, and common-mode offsets. By maintaining continuous channel-to-channel isolation between field supply terminals and rack logic paths, the unit prevents ground loops from corrupting sensitive process telemetry, including 4-20 mA HART loop protocol signals and analog input module channels operating across the DCS infrastructure.
Frequently Asked Questions
Q: How does the RUN contact output operate on the 2MLR-AC12?
A: The RUN relay contact remains closed when the internal 5 VDC rail output functions within normal voltage tolerances. If output voltage falls below critical operating thresholds or power fails, the contact opens with a response time of less than 12 ms to signal a system diagnostic fault.
Q: What size wiring and terminals are supported by the power input terminal block?
A: The input connection terminals accept stranded copper wire sizes ranging from 0.75 to 2 mm² and are compatible with RAV1.25-3.5 and RAV2-3.5 ring/spade clamped terminals.
Q: How does the module react to short-term AC line power dips?
A: Integrated input storage filtering provides instantaneous interruption handling of up to 20 ms without dropping the primary 5 VDC backplane logic output.
Field Installation Guidelines
- Ensure the AC power feed is fully isolated before connecting 110 VAC supply leads to the module terminal strip.
- Crimp input power wiring using specified RAV1.25-3.5 or RAV2-3.5 clamped terminals to guarantee vibration-proof electrical contact.
- Connect the ground wiring conductor directly to the panel frame earth ground terminal to minimize line noise and suppress transients.
- Maintain proper convective cooling clearances above and below the module rack chassis to prevent thermal trip degradation at maximum 55 deg C operating environments.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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