LEICA 301-360.021 CH-A Ruggedized Power Supply Module

Product Overview

LEICA 301-360.021 CH-A Ruggedized Power Supply Module: Industrial Resilience for Harsh Environments

The LEICA 301-360.021 CH-A is a precision-engineered industrial power supply assembly designed to deliver stable, conditioned DC power in the most demanding automation environments. Built around the 944AOPLPNCSTS rail-mount power supply series and integrated with a 400×190mm structural mounting frame, this assembly is engineered for continuous-duty operation in high-temperature, high-humidity, dust-laden, and vibration-intensive industrial settings. Whether deployed in a precision metrology control cabinet, a heavy-industry PLC enclosure, or a safety-critical DCS rack, the 301-360.021 CH-A provides the clean, regulated power that modern automation systems depend on.

Sourced directly from LEICA’s industrial automation division and manufactured in Germany, this module meets the rigorous quality standards expected in oil & gas, mining, power generation, water treatment, metallurgy, and semiconductor fabrication environments. TOPNLMS maintains verified stock of this assembly, with full pre-shipment inspection and a 12-month replacement warranty on every unit.

Rugged Specifications Table

Comprehensive Protection Solutions

The LEICA 301-360.021 CH-A does not operate in isolation — it is the power backbone of a broader control architecture. In a typical heavy-industry control cabinet, this assembly supplies regulated DC power to a cascade of critical automation components. Siemens SIMATIC S7-300 CPU modules and their associated SM321/SM322 digital I/O modules rely on stable rail voltage to maintain scan-cycle integrity under load fluctuations. Schneider Electric Modicon TSX Premium I/O racks and Advantys STB distributed I/O modules similarly depend on clean power to prevent spurious fault trips in high-EMI environments.

On the safety side, Pilz PNOZ X safety relays and Phoenix Contact PSR-SCP safety relay modules require ripple-free DC supply to guarantee SIL 2/3 response times — a requirement the 301-360.021 CH-A is well-suited to support. For communication-intensive architectures, Siemens CP 343-1 Ethernet communication processors and Profibus DP/PA segment couplers benefit from the low-noise power environment this assembly provides, reducing packet loss and bus timeout errors in noisy plant floors.

The integrated SMC CJ1B4-10U4 pneumatic cylinder within the assembly adds a mechanical actuation dimension, making this unit particularly valuable in automated clamping, positioning, or valve-control sub-systems where pneumatic and electrical control must be co-located in a single cabinet footprint. Terminal blocks such as Phoenix Contact UK 5-TWIN or Weidmüller WDU 2.5 series are commonly used alongside this assembly to distribute power cleanly to downstream field devices.

For applications requiring redundant power, pairing the 301-360.021 CH-A with a Siemens 6EP1961-2BA11 SITOP redundancy module or a Phoenix Contact Quint Power redundancy module ensures uninterrupted supply even during single-module failure — a critical requirement in continuous-process industries where unplanned downtime carries significant financial and safety consequences.

Application in Critical Infrastructure

In oil and gas upstream operations, the LEICA 301-360.021 CH-A is deployed in wellhead control panels and SCADA RTU enclosures where ambient temperatures can exceed 55°C and vibration from pump jacks or compressors is constant. Its robust mechanical frame and thermally stable power modules maintain output regulation without derating, ensuring that ESD (Emergency Shutdown) systems and fire & gas detection controllers receive uninterrupted power.

In underground mining environments, where coal dust, methane, and mechanical shock are persistent hazards, this assembly’s sealed mounting configuration and EMI-hardened design make it a preferred choice for longwall shearer control cabinets and conveyor drive panels. The 400×190mm frame integrates cleanly into standard IEC 60439-compliant enclosures used across mining automation globally.

In power generation and grid substations, the 301-360.021 CH-A supports protection relay panels and bay control units where power quality is non-negotiable. Voltage transients from switching operations and high-frequency interference from HV equipment are common — conditions this assembly is engineered to withstand without nuisance tripping or output instability.

In water and wastewater treatment facilities, continuous 24/7 operation is the norm. The assembly’s multi-module configuration (3× 944AOPLPNCSTS) provides inherent load-sharing redundancy, reducing thermal stress on individual modules and extending mean time between failures (MTBF) in always-on process control environments.

In metallurgical and steel mill applications, where induction furnaces and arc welders generate extreme electromagnetic interference, the LEICA 301-360.021 CH-A’s hardened design ensures that PLC racks, HMI panels, and drive control systems maintain stable operation throughout the production cycle.

Security & Quality FAQ

Q1: What does the 12-month warranty cover for the LEICA 301-360.021 CH-A?
Every unit shipped by TOPNLMS carries a full 12-month replacement warranty covering manufacturing defects, premature component failure, and output specification non-conformance. If a unit fails within the warranty period under normal operating conditions, TOPNLMS will arrange a replacement at no additional cost. Warranty claims are processed within 5 business days of fault confirmation.

Q2: How is the 301-360.021 CH-A tested before shipment?
All units undergo a pre-shipment inspection protocol that includes visual inspection for physical damage, output voltage verification under load, insulation resistance testing, and functional verification of the integrated SMC CJ1B4-10U4 pneumatic actuator. Units that do not pass all checkpoints are quarantined and not shipped. A test report is available upon request for quality-critical procurement.

Q3: Is the LEICA 301-360.021 CH-A compatible with third-party PLC and DCS systems?
Yes. While originally designed for LEICA metrology and industrial control architectures, the 301-360.021 CH-A’s 400×190mm panel-mount frame and standard DC output characteristics make it compatible with a wide range of third-party control cabinets, including Siemens SIMATIC, Schneider Modicon, Omron CJ/CS, and Rockwell Allen-Bradley ControlLogix enclosures. TOPNLMS technical staff can advise on integration requirements for specific system architectures.

Q4: Can TOPNLMS support long-term or repeat supply of this assembly?
Yes. TOPNLMS maintains ongoing procurement relationships with authorized LEICA industrial component distributors and maintains safety stock of high-demand assemblies including the 301-360.021 CH-A. For OEM integrators, system builders, or maintenance teams requiring scheduled replenishment, TOPNLMS offers priority stock reservation and volume pricing. Contact our team to discuss long-term supply agreements.