Allen-Bradley 440C-CR30-22BBB CR30 Configurable Safety Relay

A software-configurable safety relay with 22 embedded safety I/O points

The Allen-Bradley 440C-CR30-22BBB is a Guardmaster 440C-CR30 software-configurable safety relay with 22 embedded safety I/O points, rated PLe and SIL 3. Instead of wiring one relay per safety function, the engineer builds the logic from certified function blocks in Connected Components Workbench or Studio 5000 Logix Designer, which Rockwell describes as suitable for four to ten safety circuits and up to five zones.

It runs from 24V DC, has an embedded USB programming port and a Modbus RTU serial port, and offers two plug-in slots that take standard Micro800 plug-in modules for additional non-safety I/O or communication.

Technical specifications

Programming and diagnostics

The configuration is done with drag-and-drop safety function blocks, such as two-hand control, and the 16 user-configurable LEDs plus five status LEDs on the front give local diagnostics. The optional 440C-ENET Ethernet plug-in, fitted in slot 1 only, passes diagnostic data to a CompactLogix or Micro800 controller.

Standard digital inputs on plug-in modules can only be used for non-safety diagnostics and control, such as resets, muting sensors or external device monitoring. Safety signals must go to the embedded safety I/O.

Because the logic is stored in the relay and written from a laptop, spare-part handling differs from fixed relays: the project file should be archived with the machine records, and the configuration signature checked after any download. Rockwell’s profile also notes that the unit can be paired with Micro800 plug-ins such as 2080-IQ4OB4, 2080-IQ4, 2080-OB4 and 2080-OW4I for ordinary signalling.

Where it fits

The relay monitors E-stops, position switches, magnetic switches, proximity switches, tactile sensors, optoelectronic protection equipment and valves, and it includes start input, feedback circuit and muting functions according to the data sheet.

For a machine with several guarded zones, one CR30 can replace several fixed safety relays and give a single place to change the logic. The program, however, becomes part of the safety function, so validation and change control are the responsibility of the machine builder.

Ordering and documents

Order 440C-CR30-22BBB exactly as printed. The reference document is the 440C-CR30 product profile 440C-PP001. Other safety devices are listed in the Safety Switches & Guard Locking category.

Seven Star LLC is an independent supplier in Muscat and quotes on request. Please confirm the catalog number, ratings and the current product status against the latest Rockwell Automation documents before ordering.

How the 440C-CR30-22BBB Works

The 440C-CR30-22BBB reads its safety inputs, runs the safety logic that has been downloaded to it, and switches its safety outputs accordingly. Dual-channel inputs from devices such as E-stop buttons and interlock switches are checked against each other, and the relay can generate test pulses on its test outputs to detect short circuits and cross faults in the field wiring. When a safety function demands a stop, or when a fault is detected, the relevant solid-state safety outputs switch off and remove power from the contactors or safe-torque-off inputs that they control.

Monitored manual reset and feedback monitoring (external device monitoring) are built into the function blocks. The relay checks that the contactors it controls have actually dropped out before it allows a restart, so a welded contactor contact is detected and a dangerous restart prevented. The logic is configured in Connected Components Workbench, where each safety function is built from certified blocks rather than written as free code, and the project is then verified and downloaded over USB.

Selection & Ordering Guide for the 440C-CR30-22BBB

• 440C-CR30-22BBB – Guardmaster CR30 configurable safety relay with 22 embedded safety I/O and 24V DC supply.
• 440C-ENET – optional Ethernet plug-in for slot 1, for diagnostic data to a controller or HMI.
• Micro800 plug-ins – standard I/O for non-safety signals such as reset buttons and indicator lamps.
• Fixed-function Guardmaster relays such as the 440R MSR family can be simpler for machines with only one or two safety functions.

Choose the CR30 when a machine has several safety functions or zones that would otherwise need many fixed relays. Our team can help confirm the correct ordering code and the plug-ins when you request a quote.

Installation & Maintenance of the 440C-CR30-22BBB

• Mount the relay on 35 mm DIN rail inside an enclosure of at least IP54, which is the normal requirement for safety control equipment.
• Supply it from a 24V DC SELV/PELV power supply, and separate safety wiring from motor and drive power cables.
• Carry out a risk assessment and define the required performance level before configuring the logic, then validate every safety function on the machine.
• Archive the project file and record the configuration signature, and check it after any change or replacement.
• Proof-test the safety functions at the interval required by the machine’s safety documentation.

Typical Applications in Oman & the GCC

The 440C-CR30-22BBB is used on packaging and bottling machines, palletisers, conveyor systems, robot cells and process skids where several E-stops, guard doors and light curtains must be combined. In food and beverage plants, plastics factories and logistics centres in the region, one CR30 can replace a cabinet of single-function safety relays, simplifying wiring and making later machine changes easier.

Why Source from Seven Star LLC

Seven Star LLC is an independent supplier in Muscat. Seven Star LLC supplies Allen-Bradley Guardmaster safety components across Oman and the GCC. Send the 440C-CR30-22BBB catalog number and quantity and request a quote; our team can help confirm the correct ordering code and accessories.