Summary

• Phoenix Contact CBM E4 24DC/0.5-10A NO-R (2905743) four-channel electronic circuit breaker designed to provide individual overload and short-circuit protection for 24V DC electrical circuits in industrial automation systems, machinery, and control cabinets.
• The CBM E4 features four independently adjustable electronic protection channels, each configurable for 0.5A, 1A, 2A, 4A, 6A, or 10A. It supports a maximum total rated current of 40A, incorporates active current limitation, and mounts onto a standard 35mm DIN rail.
• Additional features include a nominal current adjustment assistant, electronic locking of current settings, individual channel status indicators, remote reset functionality, a normally open remote signaling contact, and a collective load warning output.
• Listing is for the Phoenix Contact CBM E4 24DC/0.5-10A NO-R electronic circuit breaker only, does not include any instructions, installation screws, external wiring, DIN rail, or original box. Please review all photos for the exact item, condition, and components included.
• This item was sourced from a new, uncommissioned equipment cabinet that was dismantled prior to being placed into service.

Product Description

• The Phoenix Contact CBM E4 24DC/0.5-10A NO-R is a multi-channel electronic device circuit breaker engineered to protect 24V DC loads against overloads and short circuits in industrial control applications.
• Part of the Phoenix Contact CBM Series, this compact four-channel protection module allows individual circuit protection without requiring separate circuit breaker housings for each connected load.
• Each of the four channels can be configured independently with a rated current setting of 0.5A, 1A, 2A, 4A, 6A, or 10A DC. The module supports a combined rated current of up to 40A, depending on the connected loads and power supply capability.
• The electronic protection system features active current limitation designed to reduce fault current and help prevent a short circuit on one protected load from disrupting other connected circuits.
• The integrated nominal current assistant supports configuration of individual channel settings, while electronic locking helps prevent unintended changes after the desired current ratings have been selected.
• Multi-color LED indicators provide visual information about device supply voltage, individual channel operating status, programming mode, overload conditions, short-circuit shutdowns, and overcurrent warning conditions.
• The CBM E4 includes a remote reset input, a normally open remote signaling contact, and a collective warning output that activates when at least one channel exceeds 80% of its configured nominal current.
• The module operates with a nominal 24V DC supply and supports an operating voltage range of 16.5V to 30V DC. Its electronic switching technology provides overload and short-circuit shutdown without relying on conventional replaceable cartridge fuses.
• Phoenix Contact specifies a short-circuit switching capacity of 300A and an efficiency greater than 99%. The module also includes overvoltage and undervoltage monitoring, automatically switching off protected channels under specified supply voltage fault conditions.
• Push-in terminal connections allow suitable prepared conductors to be connected without conventional screw-clamp terminations. The main positive supply connection accommodates larger conductors than the individual protected output connections.
• The compact housing measures 41mm wide, 130mm high, and 121mm deep including a 7.5mm DIN rail. It is designed for standard 35mm DIN rail mounting and has an IP20 protection rating.
• The operating temperature range of -25°C to +70°C and manufacturer-listed industrial and marine approvals make the module suitable for appropriately designed industrial automation, machinery, electrical distribution, and marine control cabinet installations.
• The circuit breaker is designed to be supplied by a compatible 24V DC power source. It is a circuit protection module, not a device for converting AC power into DC power.
• For correct operation, the negative supply must be connected to the IN- terminal. Load return currents must not pass back through the circuit breaker's IN- connection. Installation should follow Phoenix Contact's wiring and protection requirements.

Product Information

• Brand: Phoenix Contact
• Manufacturer: Phoenix Contact
• Model Number: CBM E4 24DC/0.5-10A NO-R
• Series: CBM
• MPN: 2905743
• SKU: 2905743
• Type: Electronic Device Circuit Breaker
• Product Category: Multi-Channel Electronic Circuit Protection Module
• Circuit Breaker Technology: Electronic
• Number of Protection Channels: 4
• Nominal Operating Voltage: 24V DC
• Operating Voltage Range: 16.5–30V DC
• Maximum Total Rated Current: 40A DC
• Adjustable Current Per Channel: 0.5A / 1A / 2A / 4A / 6A / 10A
• Factory Preset Current Per Channel: 0.5A
• Trip Method: Electronic
• Short-Circuit Switching Capacity: 300A
• Rated Surge Voltage: 0.5kV
• Active Current Limitation at 0.5–1A: Typically 2.0 x Rated Current
• Active Current Limitation at 2–10A: Typically 1.5 x Rated Current
• Efficiency: Greater Than 99%
• Typical Closed-Circuit Current Consumption: 42mA
• Power Dissipation at No Load: 0.5W
• Power Dissipation at Nominal Operation: 7W
• Module Initialization Time: 1.6 Seconds
• Overload / Short-Circuit Cooldown Time: 10 Seconds
• Typical Shutdown Time at Greater Than 1.3 x Rated Current: 0.02 Seconds
• Typical Shutdown Time at 1.1–1.3 x Rated Current: 30 Seconds
• Undervoltage Shutdown Threshold: 15.8V DC or Lower
• Overvoltage Shutdown Threshold: 30.5V DC or Higher
• Maximum Capacitive Load Per Channel: 75,000µF at 24V DC
• Individual Channel Switch-On Delay: 0.1 Seconds
• Current Adjustment Assistant: Yes
• Electronic Current Setting Lock: Yes
• Individual Channel Status LEDs: Yes
• Supply Voltage Status LED: Yes
• Remote Reset Input: Yes
• Remote Reset Input Voltage Range: 7–30V DC
• Remote Signaling Contact: Normally Open (N/O)
• Remote Signaling Voltage Range: 0–30V DC
• Remote Signaling Current Range: 1–100mA DC
• Collective Load Warning Output: Yes, Above 80% of Set Current
• Collective Warning Output Voltage: 24V DC
• Collective Warning Output Maximum Current: 20mA
• Connection Technology: Push-In
• Main Positive Input Conductor Size: 20–4 AWG
• Main Negative Input Conductor Size: 24–12 AWG
• Output Conductor Size: 24–12 AWG
• Mounting Style: DIN Rail
• Compatible DIN Rail: 35mm
• Housing Color: Light Gray / Gray
• Housing Materials: PC, PA 6.6, PBT-FR17, POM
• Housing Flammability Classification: UL 94 V-0
• Width: 41mm
• Height: 130mm
• Depth: 121mm Including 7.5mm DIN Rail
• Degree of Protection: IP20
• Protection Class: III
• Operating Temperature: -25°C to +70°C
• Storage / Transport Temperature: -40°C to +80°C
• Maximum Installation Altitude: 6000m Above Sea Level
• UL Approvals: UL 508, UL 2367
• Hazardous Location Approval: Class I, Division 2 (Applicable Listed Groups)
• Marine Approval: DNV GL
• RoHS Compliance: Compliant with Listed Exemptions
• Manufacturer EAN / GTIN-13: 4046356992350
• Country of Origin: Not Verified for This Specific Unit
• Unit Quantity: 1
• Unit Type: Unit

Included

• 1x Phoenix Contact CBM E4 24DC/0.5-10A NO-R Four-Channel Electronic Circuit Breaker (2905743)

Not Included

• 35mm DIN Rail
• External 24V DC Power Supply
• External Input or Output Wiring
• Additional Circuit Breakers
• Additional Mounting Hardware
• Installation Screws
• Installation Instructions
• Original Manufacturer Packaging
• Other Industrial Automation or Electrical Accessories

Please review all photos for the exact item, condition, and components included.