Honeywell 2MLR-AC13-CC Replacement for 2MLR Series

Product Overview

Honeywell 2MLR-AC13-CC Replacement for 2MLR Series: Smooth Transition from Legacy Safety Relay Systems

The Honeywell 2MLR-AC13-CC is a modular safety relay with integrated AC power supply, designed for use within the Honeywell 2MLR Series safety relay platform. As legacy safety relay systems age and original units reach end-of-life, facilities running older Honeywell safety architectures face increasing pressure to source verified replacement modules that maintain full functional and wiring compatibility. The 2MLR-AC13-CC addresses this need directly — offering a drop-in upgrade path that preserves existing terminal layouts, DIN rail mounting dimensions, and AC supply wiring without requiring panel redesign or PLC program modification.

Industrial plants operating Honeywell safety relay systems often encounter the 2MLR-AC13-CC in emergency stop (E-stop) circuits, light curtain monitoring loops, two-hand control applications, and safety door interlock systems. When the original unit fails or is flagged for preventive replacement during a scheduled maintenance window, sourcing a verified equivalent quickly is critical to minimizing production downtime. TOPNLMS maintains ready stock of the 2MLR-AC13-CC and ships from Xiamen within 1–3 business days to destinations worldwide.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration from a failed or end-of-life safety relay system rarely involves a single component. When replacing the 2MLR-AC13-CC power supply module, engineers typically review the entire safety relay assembly to assess whether companion modules are also approaching end-of-life or require recertification. Within the 2MLR Series platform, the power supply module works in conjunction with 2MLR expansion relay modules that handle additional safety channels — these should be inspected and replaced as a set if the system has been in service for more than five years.

For facilities upgrading from older hardwired relay panels to a more structured modular safety architecture, the migration often involves replacing conventional terminal blocks with Honeywell safety relay base units and adding 2MLR monitoring expansion modules to cover additional E-stop zones or light curtain inputs. In applications where the safety relay interfaces with a Siemens S7-300 or S7-400 PLC, no program changes are required — the 2MLR-AC13-CC outputs standard hardwired safety signals that connect directly to the PLC’s digital input modules without protocol conversion.

Control cabinet space is a common constraint during retrofit projects. The 2MLR-AC13-CC’s compact DIN rail footprint allows it to be installed alongside Phoenix Contact or Weidmüller terminal blocks, 24 VDC power supply units, and safety-rated circuit breakers without requiring cabinet expansion. For systems that also include Pilz PNOZ safety relays or Schmersal safety door switches in the same panel, the 2MLR-AC13-CC can coexist on the same DIN rail section without interference.

In modernization projects where the plant is transitioning from a fully hardwired safety relay architecture toward a Safety PLC (e.g., Siemens S7-1500F or Allen-Bradley GuardLogix), the 2MLR-AC13-CC can serve as an interim solution — maintaining the existing safety loop integrity while the new Safety PLC program is developed and validated. This staged approach significantly reduces the risk of unplanned downtime during the migration window. Once the Safety PLC is commissioned, the 2MLR-AC13-CC can be retained as a standalone safety relay for non-critical zones or decommissioned cleanly.

For applications requiring signal isolation between the safety relay output and the PLC input — particularly in environments with high electrical noise from variable frequency drives (VFDs) or servo drive systems — a signal isolator or safety relay output module is recommended between the 2MLR-AC13-CC and the control system input card. TOPNLMS can advise on compatible isolation components based on your specific panel layout and PLC platform.

Retrofit Guidance FAQ

Q: Can I replace the 2MLR-AC13-CC without rewiring the safety loop?
A: Yes. The 2MLR-AC13-CC uses the same screw terminal layout as earlier 2MLR Series power supply modules. In most cases, the existing wiring can be reconnected directly to the replacement unit without modification. Always verify terminal assignments against the original wiring diagram before energizing.

Q: Do I need to modify my PLC program after replacing the 2MLR-AC13-CC?
A: No. The 2MLR-AC13-CC outputs standard hardwired safety signals. It does not communicate via any fieldbus or industrial Ethernet protocol (no PROFIBUS, PROFINET, EtherNet/IP, or Modbus interface). Your PLC program reads the relay output contacts as standard digital inputs — no logic changes are required.

Q: Will the 2MLR-AC13-CC fit in the same DIN rail slot as the original unit?
A: Yes. The module is designed for 35 mm DIN rail mounting and maintains the same physical width as the original 2MLR Series power supply module. No cabinet modification or additional mounting hardware is required.

Q: What AC supply voltage range does the 2MLR-AC13-CC accept?
A: The unit accepts a wide-range AC input (100–240 V AC, 50/60 Hz), making it suitable for both 110 V and 220 V panel environments without requiring a separate transformer or voltage selector.

Q: Can the 2MLR-AC13-CC be used with 2MLR expansion modules already installed in the panel?
A: Yes. The 2MLR-AC13-CC is fully compatible with existing 2MLR Series expansion relay modules. The modular bus connection between the power supply and expansion modules is maintained, and no reconfiguration of the expansion modules is required.

Q: What safety standards does the 2MLR-AC13-CC comply with?
A: The 2MLR Series platform is designed to support safety applications up to Category 4 / Performance Level e (PLe) per ISO 13849 and SIL 3 per IEC 62061, depending on the overall system architecture and wiring configuration.

Warranty Assurance

Every Honeywell 2MLR-AC13-CC unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to dispatch, each unit undergoes functional verification including power-on testing, output contact continuity checks, and visual inspection for physical damage. Units that do not pass inspection are not shipped.

In the event of a warranty claim, TOPNLMS provides a straightforward replacement process: contact our team at [email protected] with your order reference and a description of the fault. We will arrange a replacement unit or issue a refund based on your preference and the nature of the defect. Return shipping for confirmed warranty cases is coordinated by TOPNLMS.

Our after-sales response time is within 24 hours on business days. For urgent production-critical situations, please indicate the urgency in your email subject line and we will prioritize your case. We understand that safety relay failures in active production environments carry significant operational risk, and we treat all warranty cases with the seriousness they deserve.

TOPNLMS ships globally from Xiamen, China, with standard lead times of 1–3 business days for in-stock items. Express shipping options (DHL, FedEx, UPS) are available for time-critical orders. All shipments include tracking and commercial invoice documentation suitable for customs clearance in most destination countries.