Phoenix Contact CBMC E4 24DC/1-10A IOL IO-Link Breaker

CBMC E4 24DC/1-10A IOL: four-channel electronic circuit breaker for 24 V DC loads

The Phoenix Contact CBMC E4 24DC/1-10A IOL (order no. 2910411) takes the four-channel CBMC electronic circuit breaker and adds an IO-Link interface. Like the N/O-contact version it protects four 24 V DC branches with settable nominal currents from 1 A to 10 A, but instead of one collective relay contact it talks to an IO-Link master over a standard three-wire sensor cable. The designation reads CBMC for the family, E4 for four electronic channels, 24DC for the nominal voltage, 1-10A for the setting range, and IOL for IO-Link. Through the interface a controller can read channel status and load values and set parameters remotely, which is valuable when the cabinet is far from the control room.

Seven Star LLC supplies this device as an independent supplier in Muscat for customers across Oman and the GCC.

Technical specifications of the CBMC E4 24DC/1-10A IOL

How the CBMC E4 24DC/1-10A IOL protects each output channel

The power stage behaves like the other CBMC E4 modules: each channel is monitored separately, an overload of 1.2 to 2.0 times nominal is switched off after 1 second, and a short circuit above twice nominal is cleared in 10 ms or less, followed by a 5 second wait. What changes is the communication side. The IO-Link port has its own push-in terminal, accepts a 24 V DC supply with reverse-polarity protection and draws at most 30 mA. It exchanges 8 bytes of input process data and 3 bytes of output process data, so a PLC can see more than a simple on or off state, and a green flashing IO-Link LED confirms an active connection.

The front LEDs remain fully functional, so local technicians do not depend on the fieldbus. The manufacturer also states that the product is being prepared for the EU Cyber Resilience Act, which is worth noting if your project has cybersecurity documentation requirements.

Where the CBMC E4 24DC/1-10A IOL fits in a 24 V DC system

This module is intended for cabinets that already use IO-Link masters, for example on remote I/O stations in water pumping, compressor and packaging-style skid systems. It lets a single IO-Link port deliver diagnostic information from the protection layer without extra wiring to digital inputs. If the plant has no IO-Link infrastructure, the NO versions 2906032 (1-10 A) and 2906031 (1-4 A) are simpler. For installations that also need a reset input and a status output at the front, the CBM E4 24DC/0.5-10A NO-R (2905743) is the related design.

Selection and ordering checklist

• Confirm that an IO-Link master and its parameter tool are available in the control system.
• Check the IO-Link device description requirements using the Vendor and Device IDs above.
• Confirm all branches are 10 A or less and the total is within the 40 A input and derating curve.
• Check capacitive loads against the 40000 μF limit.
• Plan a separate 24 V DC feed for the IO-Link L+ line.
• Decide whether a hard-wired alarm to the PLC is also needed as a back-up.

Installation, commissioning and maintenance

Mount the module on a 35 mm rail and wire the supply, the four loads and the IO-Link line using the push-in terminals. Remember that the negative pole must be connected to IN- so the internal electronics are powered. After power-up, wait for module initialisation of about 1.6 s before expecting channel output. Set the initial current values locally or through IO-Link, lock them, and then check each channel against its real load. When an IO-Link connection is established, the dedicated LED flashes green; no light means there is no communication.

For service, keep a record of the parameter set so a replacement module can be configured identically. The channel LEDs make a field diagnosis possible even when the master is offline.

Typical applications in Oman and the GCC

In Oman and the GCC, remote-monitored panels are common at wellhead pads, booster stations, water transfer pumping stations and unmanned electrical substations, where site visits are costly and a trip should be visible to the control room immediately. Using IO-Link status from the breaker means the operator can distinguish a tripped sensor circuit from a lost supply. The 60 °C operating limit and the derating table make it important to ventilate or shade outdoor enclosures in summer conditions.

Comparison with sibling devices

Information to send with an RFQ

• Full part number and quantity.
• IO-Link master type and version.
• Number of branches and currents.
• Panel ambient temperature.
• Required approvals.
• Delivery location and date.

Documents and quotation

Send us the part number CBMC E4 24DC/1-10A IOL and the quantity you need, and we will confirm which official documents are available for this device. Seven Star LLC is an independent supplier in Muscat and quotes for projects across Oman and the GCC; we do not act on behalf of the manufacturer.

Please also tell us the delivery location and required timeline so that availability can be checked before you commit to a project schedule.