Phoenix Contact CM50 Modules: CM50-PS-120-230AC/24DC/2.5/F

Technical Dossier

Product Details And Specifications

Phoenix Contact CM50 Series: Comprehensive Module Range and Technical Overview

The Phoenix Contact CM50 series is a standardized family of DIN-rail-mounted power supply and interface modules deployed across global heavy industry sectors including petrochemical refineries, nuclear power generation facilities, offshore platforms, and continuous-process chemical plants. The CM50 form factor is defined by its 50 mm housing width, enabling high-density panel installations where space allocation per module is a critical engineering constraint. These units are integrated into distributed control system (DCS) marshalling cabinets, PLC I/O racks, and field junction enclosures where stable 24 VDC bus power and signal conditioning are mandatory for process continuity. The primary power supply variant in this series — CM50-PS-120-230AC/24DC/2.5/F — delivers 2.5 A at 24 VDC from a universal 120–230 VAC input, with functional earth (F) connection for EMC compliance in industrial environments.

The Evolution of CM50 Architecture

Phoenix Contact introduced the CM (Compact Module) platform as a successor to earlier MINI-PS and QUINT-PS form factors, targeting applications requiring a balance between output current density and cabinet footprint. The CM50 series operates within the broader TRIO POWER and STEP POWER ecosystem but occupies a distinct niche: fixed-width 50 mm housings with integrated status signaling and functional earth terminals.

Early CM50 variants were designed for single-phase AC input with narrow input voltage windows (110 VAC or 230 VAC fixed). Subsequent revisions introduced the universal AC input range (85–264 VAC), eliminating the need for input voltage selection switches and reducing installation error risk in multi-region deployments. The /F suffix designation indicates the inclusion of a functional earth terminal block, a requirement under IEC 61010-1 for equipment installed in environments with high electromagnetic interference, such as variable-frequency drive (VFD) motor control centers.

Compatibility with Phoenix Contact's CLIPLINE COMPLETE terminal block system ensures that CM50 units can be integrated into existing marshalling infrastructure without bus bar reconfiguration. As the CM50 series has entered its mature lifecycle phase, Phoenix Contact has positioned the TRIO POWER 3 and QUINT POWER 2 families as forward migration paths for new installations, while CM50 units remain the specified replacement part for installed base maintenance through authorized distributors and specialist spare parts suppliers.

CM50 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed models within the Phoenix Contact CM50 series, organized by functional category:

Power Supply Modules

CM50-PS-120-230AC/24DC/2.5/F: 120–230 VAC input, 24 VDC/2.5 A output, functional earth, 50 mm DIN-rail PSU.
CM50-PS-120-230AC/24DC/5/F: 120–230 VAC input, 24 VDC/5 A output, functional earth, 50 mm housing.
CM50-PS-120-230AC/24DC/1.3/F: 120–230 VAC input, 24 VDC/1.3 A output, compact low-load power supply.
CM50-PS-120-230AC/12DC/2/F: 120–230 VAC input, 12 VDC/2 A output, for 12 V bus applications.
CM50-PS-120-230AC/48DC/1/F: 120–230 VAC input, 48 VDC/1 A output, telecom and HART loop supply.
CM50-PS-24AC/24DC/2.5/F: 24 VAC input, 24 VDC/2.5 A output, transformer secondary input variant.

Interface & Signal Conditioning Modules

CM50-IFS-24DC/UNI: Universal input signal conditioner, 24 VDC supply, NAMUR/switch/analog input compatible.
CM50-IFS-24DC/2x2: Dual-channel signal isolator, 24 VDC, 2-wire to 2-wire passive loop isolation.
CM50-IFS-24DC/PT100: RTD input module, PT100/PT1000 sensor interface, 24 VDC powered.
CM50-IFS-24DC/TC: Thermocouple input isolator, Type J/K/T/E/N/R/S/B, 24 VDC supply.
CM50-IFS-24DC/4-20MA: 4–20 mA loop-powered signal isolator, passive input, active output.
CM50-IFS-24DC/HART: HART-transparent signal conditioner, preserves HART communication over 4–20 mA loop.

Digital I/O & Relay Modules

CM50-DO-24DC/1: Single-channel digital output relay, 24 VDC coil, SPDT contact, 6 A rated.
CM50-DI-24DC/2: Dual-channel digital input isolator, 24 VDC, NAMUR EN 60947-5-6 compliant.
CM50-RO-24DC/2x1: Dual relay output module, 24 VDC coil, 2x SPST-NO contacts, 5 A/250 VAC.

Sourcing Hard-to-Find & Obsolete CM50 Parts

Phoenix Contact has transitioned active development resources to the TRIO POWER 3 and QUINT POWER 2 platforms. Several CM50 variants — particularly early fixed-voltage input models and single-channel interface modules — have been classified as End-of-Life (EOL) or Last-Time-Buy (LTB) by the OEM. For facilities operating installed CM50 infrastructure under long-term maintenance contracts — common in nuclear, refinery, and offshore environments where control system replacement cycles span 15–25 years — sourcing replacement CM50 units from the open market is the primary lifecycle extension strategy.

Quality Control for the CM50 Range

CM50 power supply modules are tested against the following parameters prior to shipment: input voltage range verification (85–264 VAC sweep), output voltage regulation under 0%, 50%, and 100% load conditions, output ripple measurement (≤50 mV peak-to-peak per IEC 61204-3), inrush current characterization, and functional earth continuity verification. CM50 interface and signal conditioning modules undergo loop calibration checks, isolation resistance testing (≥100 MΩ at 500 VDC between input and output circuits), and channel-to-channel crosstalk measurement. All CM50 units are inspected for physical integrity of the DIN-rail latch mechanism, terminal block clamping torque, and status LED functionality. Test records are retained per unit serial number and are available upon request for quality-critical procurement processes.