The Honeywell 2MLR-AC23, also cataloged as the 2MLR-AC23 Redundant Power Supply Module, operates as a dedicated hardware component for power distribution within 2MLRCPUH/T and 2MLRCPUH/F controller platforms.
Hardware Specifications
Parameter
Specification
Model
2MLR-AC23
Brand
Honeywell
Origin
Korea
Weight
3.00 kg
Dimensions
Standard rack-mount power module profile
Operating Temp
0 deg C to +55 deg C
Power Consumption
AC 200-240 VAC input, DC 5V 8.5 A output
Input Voltage
200-240 VAC nominal
Output Current
8.5 AMP (DC 5V)
System Compatibility
2MLRCPUH/T and 2MLRCPUH/F racks
4-20 mA HART Loop Protocol and Channel Isolation
The power supply architecture incorporates internal galvanic isolation barriers between the high-voltage AC input stage and the low-voltage DC internal rails, protecting sensitive processor and I/O modules from power surges and transient line spikes. Channel-to-channel isolation and internal filtering minimize high-frequency noise propagation onto the backplane bus. The unit regulates secondary output voltages precisely to maintain stable logic supply levels under fluctuating line conditions, ensuring continuous operation across distributed industrial control loops.
Frequently Asked Questions
Q: Does the power module support hot-swapping in a redundant rack configuration?
A: Yes. In dual-module redundant setups, a faulted power supply can be extracted and replaced while the rack remains under active power, provided system safety protocols are observed.
Q: What are the primary input voltage tolerances for this AC power module?
A: The module accepts an input voltage range of 200-240 VAC, designed to accommodate standard industrial AC power distribution tolerances.
Q: How is thermal dissipation managed within the enclosure chassis?
A: The module utilizes passive convection cooling through external heat sinks and housing vents, requiring adequate vertical clearance above and below the rack.
Field Installation Guidelines
Ensure the main AC power distribution feed is isolated and locked out before inserting or removing the power supply module from the rack slot.
Align the module housing carefully with the rack guide rails and push forward until the rear connectors engage securely with the backplane bus.
Fasten the mechanical securing screws on the top and bottom of the faceplate to maintain structural stability and grounding continuity.
Verify input AC voltage levels with a digital multimeter before closing the main power circuit breaker to energize the system.
