Honeywell 2MLP-DC42-CC Retrofit-Ready DC Power Supply for Experion PKS Control Systems
The Honeywell 2MLP-DC42-CC is a DC power supply module engineered for seamless integration into Experion PKS distributed control system architectures. As legacy Honeywell TDC 3000 and PlantScape systems approach end-of-life, plant engineers and automation integrators increasingly rely on the 2MLP-DC42-CC as a verified drop-in replacement that preserves existing wiring infrastructure, backplane slot assignments, and control logic continuity. Whether you are executing a phased cabinet upgrade, recovering from an unplanned module failure, or migrating an entire control loop to a modernized Experion PKS platform, this module delivers the power stability and compatibility required to maintain uninterrupted process control.
The 2MLP-DC42-CC provides regulated DC output to power I/O modules, communication cards, and controller assemblies mounted on the Experion PKS chassis. Its terminal block layout is dimensionally and electrically compatible with predecessor Honeywell power supply modules, eliminating the need for custom wiring adapters or panel re-engineering during retrofit. Engineers replacing aging units in active production environments will find that the module’s input voltage tolerance accommodates the minor supply fluctuations common in older electrical rooms, reducing nuisance trips during commissioning.
Upgrade Compatibility Table
| Parameter | Detail |
|---|---|
| SKU / Part Number | 2MLP-DC42-CC |
| Brand / Manufacturer | Honeywell Process Solutions |
| Compatible Platform | Experion PKS (C200, C300 series controllers) |
| Module Type | DC Power Supply Module |
| Backplane Interface | Compatible with standard Experion PKS chassis backplane |
| Terminal Wiring | Drop-in compatible; no adapter required for direct replacement |
| Communication Compatibility | Supports FTE (Fault Tolerant Ethernet) powered infrastructure |
| Predecessor Replacement | Suitable replacement for legacy TDC 3000 and PlantScape power modules |
| Installation Requirement | Standard DIN rail / chassis slot mounting; verify slot address before insertion |
| Commissioning Note | Confirm module address via Experion Configuration Studio before power-on |
| Warranty | 12 Months from shipment date |
| Outgoing Test | Function-tested prior to shipment |
Retrofit Planning for Existing Automation Systems
Successful retrofit of the 2MLP-DC42-CC into an operating Experion PKS system requires a structured pre-installation review. Begin by auditing the existing cabinet layout to confirm available chassis slots and verify that the backplane bus voltage matches the module’s rated input range. In multi-chassis configurations using the Honeywell EHPM (Extended Historian and Power Module) architecture, document the power budget across all populated slots before removing the legacy unit — the C200 Controller and C300 Controller assemblies draw variable current depending on the number of active I/O links, and an undersized replacement can cause intermittent resets.
Terminal block wiring should be photographed and labeled before disconnection. The 2MLP-DC42-CC uses the same screw-terminal pitch as earlier Honeywell power modules, so existing field cables can be re-landed without re-crimping. If the cabinet also houses a Honeywell PMIO (Power and Main I/O) assembly or a Series-C I/O Link module, confirm that the shared DC bus rail is de-energized before module swap to prevent arc flash on adjacent terminals.
For sites running Honeywell ControlEdge PLC alongside Experion PKS, verify that the 24 VDC distribution panel feeding both platforms is rated for the combined inrush current during simultaneous restart. Integrators migrating from older Honeywell HPM (High-Performance Process Manager) nodes should also check that the Experion Server communication path — typically routed through a Honeywell FTE Switch — remains active during the power module changeover to avoid historian data gaps. Where a Honeywell UDC (Universal Digital Controller) or a third-party HMI panel is connected via Modbus or HART, the communication link should be placed in manual hold mode before the swap to prevent spurious setpoint writes during the brief power interruption.
Sites that include a Honeywell Safety Manager or Safety System Interface (SSI) module in the same cabinet must coordinate the power module replacement with the safety system’s bypass procedure. The 2MLP-DC42-CC does not directly interface with the safety bus, but a momentary DC rail disturbance can trigger a safety system diagnostic alarm if the cabinet grounding is not properly bonded. Confirm earth continuity with a milliohm meter before re-energizing.
Downtime Control During System Migration
Minimizing unplanned downtime is the primary concern when replacing a power supply module in a live Experion PKS environment. The recommended approach is a hot-standby swap using a pre-configured spare: load the replacement 2MLP-DC42-CC module address and firmware revision into Experion Configuration Studio on a laptop connected to the FTE network before the physical swap. This allows the system to recognize the new module within seconds of insertion, bypassing the full discovery cycle that would otherwise extend the outage window.
Before removing the failed or aging module, export the current controller configuration from the C200 or C300 using Control Builder to a local backup file. This preserves all function block logic, PID tuning parameters, and I/O channel assignments. If the site uses Honeywell’s Continuous Historian, verify that the data collection service is set to buffer mode so that process values are not lost during the brief communication interruption.
For plants where even a 30-second control interruption is unacceptable, consider installing the 2MLP-DC42-CC in a redundant power configuration using a Honeywell Redundant Power Module chassis. In this arrangement, the secondary module assumes full load while the primary is replaced, and the switchover is transparent to the running control strategy. After re-insertion, monitor the Experion Operator Station alarm summary for any module health diagnostics and confirm that all I/O channels return to their pre-swap states before releasing the loop to automatic control.
Retrofit Support FAQ
Q1: Is the 2MLP-DC42-CC a direct replacement for my existing Honeywell Experion PKS power module?
A: In most Experion PKS C200 and C300 chassis configurations, yes. Verify the slot address and backplane bus voltage before installation. If your existing module carries a different suffix (e.g., -CA or -CB), confirm the output current rating matches your chassis load before swapping.
Q2: What wiring changes are required during installation?
A: The 2MLP-DC42-CC uses the same terminal block pitch and pin assignment as predecessor Honeywell DC power modules. In the majority of retrofit cases, existing field cables can be re-landed directly with no modification. Always photograph the original wiring before disconnection and verify terminal torque to the manufacturer’s specification after re-landing.
Q3: How is the module tested before shipment?
A: Each 2MLP-DC42-CC unit undergoes functional power-on testing prior to dispatch. Output voltage, current regulation, and protection circuit operation are verified. A 12-month warranty from the shipment date covers manufacturing defects and functional failures under normal operating conditions.
Q4: Can this module be used in a system that also includes legacy TDC 3000 or PlantScape hardware?
A: The 2MLP-DC42-CC is designed for the Experion PKS platform. In hybrid sites where TDC 3000 or PlantScape nodes coexist with Experion PKS on a shared FTE network, the module can power the Experion PKS chassis without issue. However, it is not electrically or mechanically compatible with TDC 3000 power supply slots — those require their own dedicated replacement units.
© 2026 SMARTNEXMSK. All rights reserved.
Original Source: https://smartnexmsk.com
Contact: [email protected] | +86 18259474341
