- Automation & ControlView all 1,689 products
- AC Drives
- Industrial Communications
- PLC & I/O Cards
- Vibration Monitoring
- Automation Accessories
- Controllers & Data Acquisition
- CCTV & Security
- Safety Switches & Guard Locking
- Encoders
- Isolator & Barrier
- Industrial Computers
- Servo Drives
- Motor Soft Starters
- HMI Displays
- Pneumatic Cylinders
- Automation Software
- Machine Vision
- Robotics
Brand: Allen-Bradley
Allen-Bradley 440R-ENETR GSR EtherNet/IP Interface
Description
A two-port EtherNet/IP gateway for Guardmaster GSR safety relays
The Allen-Bradley 440R-ENETR is an EtherNet/IP network interface for Guardmaster safety relays that have the optical bus. It sits on the left of the relay group, passes diagnostic data to a Logix controller, and provides two RJ-45 ports for star, tree, daisy-chain and ring layouts.
It is a diagnostic and status link and not a safety device: the installation sheet states that the product is not intended for safety-related control or diagnostics. Safety functions stay in the relays themselves.
Technical specifications
| Parameter | Specification |
|---|---|
| Catalog number | 440R-ENETR |
| Function | EtherNet/IP network interface for Guardmaster optical-bus safety relays |
| Relay capacity | Six Guardmaster safety relays |
| Supported relays (firmware 2.xx or later) | 440R-D22R2 GSR DI, 440R-D22S2 GSR DIS, GSR EM, 440R-EM4R2D GSR EMD, 440R-GL2S2P GSR GLP, 440R-GL2S2T GSR GLT |
| Ethernet ports | 2 (embedded switch), RJ-45 |
| Ethernet speed | 10/100 Mbit/s, half or full duplex |
| Topologies | Star, tree, daisy-chain / linear and ring |
| Power supply | 24V DC, range 11 to 26.4V DC, reverse-polarity protected |
| Power consumption | 2.2 W maximum at 26.4V DC |
| Dimensions (H x W x D) | 111.4 x 22.5 x 113.6 mm |
| Weight | 180 g |
| Operating temperature | -20 to +55 C |
| Vibration / shock | 5 g at 10 to 500 Hz / 15 g |
| Enclosure | Open style; mount in a suitable enclosure |
| Safety classification | Not applicable |
Addressing and compatibility
Three rotary switches set the last part of the address, with valid values 001 to 254. The factory setting is 999 with DHCP enabled. Setting 001 gives a gateway of 0.0.0.0, while 002 to 254 gives gateway 192.168.1.1. An invalid setting such as 000 makes the interface use DHCP or the address stored in memory.
RSLogix 5000 version 19 or later is required for the add-on profile, and BootP/DHCP utility version 2.3.2 or later is advised. Only version 2 or later firmware on optical-bus relays works with this interface.
Because the interface reads status from the relays over the optical bus, no extra wiring is needed between it and the first relay, and the same applies down the row. This keeps diagnostics such as input state, output state and fault codes available in the controller for alarm displays and maintenance reports, which is especially useful on machines with many guarded zones and remote cabinets.
Mounting rules
Fit it vertically on a 35 mm DIN rail, to the left of the relays, with no more than 5 mm gap between adjacent units so that the optical link works. Leave 37.4 mm above and below, or the temperature ratings are derated.
Do not connect 120/240V AC to the A1/A2 supply, and wire no more than two conductors on one terminal. For the CE Low Voltage Directive the supply must be SELV or PELV. The status indicators show module, network and both link states.
Related Allen-Bradley products: Allen-Bradley 440C-CR30-22BBB CR30 Configurable Safety Relay, Allen-Bradley 440R-N23124 MSR127T Safety Relay 230V AC and Allen-Bradley 440R-N23135 MSR127RP Safety Relay 24V AC/DC.
Ordering and documents
Order 440R-ENETR exactly as printed. The hosted document is the 440R-IN078 installation instructions, and the photo is the official Rockwell product photograph of this part. 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.
Datasheets & Documents
- Installation instructions Guardmaster EtherNet/IP Network Interface 440R-ENETR Installation Instructions (440R-IN078) Download
Reviews (0)
About brand
Allen-Bradley is the brand of Rockwell Automation for industrial control: ControlLogix and CompactLogix controllers, I/O systems, PanelView operator terminals, PowerFlex drives, motor control and industrial network equipment. The company began in Milwaukee in 1903, when Lynde Bradley and Dr. Stanton Allen formed the Compression Rheostat Company to make the motor speed controller Bradley had invented in 1901. It took the name Allen-Bradley in 1909 and was bought by Rockwell International in 1985. Since 2001 its owner has been Rockwell Automation, which is still headquartered in Milwaukee, Wisconsin.
Allen-Bradley company profile
| Founded | 1903, Milwaukee, Wisconsin, USA, as the Compression Rheostat Company |
|---|---|
| Founders | Lynde Bradley (inventor of the compression rheostat, 1901) and Dr. Stanton Allen (investor); Harry Bradley joined in 1904 |
| Name | Allen-Bradley Company from 1909 |
| Ownership | Acquired by Rockwell International in 1985 for about USD 1.65 billion; a brand of Rockwell Automation (NYSE: ROK) since 2001 |
| Headquarters | Milwaukee, Wisconsin, USA |
| Product families | Logix programmable automation controllers (ControlLogix, CompactLogix), legacy SLC 500 and MicroLogix PLCs, Micro800 controllers, POINT, FLEX and Compact I/O, PanelView HMIs, PowerFlex AC drives, contactors, motor starters and soft starters, safety components, Stratix Ethernet switches |
Milestones
- 1901: Lynde Bradley invents the compression rheostat to control the speed of electric motors.
- 1903: The Compression Rheostat Company is formed in Milwaukee with an initial investment of USD 1,000.
- 1904: Harry Bradley joins; a crane controller is shown at the St. Louis World's Fair.
- 1909: The company is renamed Allen-Bradley.
- 1985: Rockwell International acquires Allen-Bradley.
- 2001: Rockwell Automation becomes the company's name; the Allen-Bradley brand marks 100 years in 2003.
Reading Allen-Bradley catalogue numbers
The first digits of an Allen-Bradley catalogue number identify the platform, which tells you what is compatible with what. 1756 is ControlLogix (chassis-based, used for large process and plant control), 1769 is CompactLogix 5370 with Compact I/O, 5069 is CompactLogix 5380 with Compact 5000 I/O, 1734 is POINT I/O, 1794 and 5094 are FLEX and FLEX 5000 distributed I/O, 1746 and 1747 belong to the older SLC 500 family, 1766 is MicroLogix 1400 and 2080 is Micro800. For drives, 25B is PowerFlex 525 and 22B is PowerFlex 40; in a code such as 25B-D010N114, "D" means 380–480 V, "010" is the output current rating, and N114 instead of N104 means the drive has an integrated EMC filter. Many plants in the region still run SLC 500 and older MicroLogix systems, which Rockwell has discontinued, so exact spares and migration to CompactLogix are both common requests.
Where Allen-Bradley products are used
In Oman and the GCC, Allen-Bradley controllers and drives run on oil and gas facilities, water treatment and pumping stations, cement, food and beverage and packaging plants, and on machines supplied by American OEMs. ControlLogix is often the platform for plant control systems, while PowerFlex drives are used on pumps, fans and conveyors.
Allen-Bradley products we list
| Family | Examples |
|---|---|
| ControlLogix | 1756-L85E, 1756-EN2T, 1756-EN2TR, 1756-IF16, 1756-IB32, 1756-PA75, 1756-A10 |
| CompactLogix and Micro controllers | 5069-L320ER, 5069-L340ERM, 1769-L33ER, 1769-L16ER, MicroLogix 1400, Micro820, SLC 500 (1746) |
| Distributed I/O | 1734-AENTR, 1734-IB8, 1734-IE2C, 1734-IB8S safety, 1794-AENTR, 5094-AENTR, 5069-IF8 |
| Operator terminals | PanelView Plus 7 10-inch, PanelView Plus 7 15-inch, PanelView 800, PanelView 5310 |
| Drives, motor control and networking | PowerFlex 525, PowerFlex 755, PowerFlex 4, 150-A180NBD SMC, Stratix 2000, 1783-NATR |
Ordering Allen-Bradley products: what we need
Send the full catalogue number and the series letter from the label (for example 1756-EN2T Series D), because firmware and compatibility can change between series. For drives, add the motor power, voltage and filter option. For a discontinued SLC 500 or MicroLogix part, tell us whether you need the exact spare or a migration proposal.
Facts checked against Rockwell Automation's published company history, October 2026.
Browse Allen-Bradley products by category: PLC & I/O Cards, AC Drives.
FAQ
Questions about the Allen-Bradley 440R-ENETR GSR EtherNet/IP Interface
Answers from our engineering team on installation, compatibility and integration.
01What is 440R-ENETR?
An EtherNet/IP interface for Guardmaster safety relays with optical bus.
02How many relays can it serve?
Up to six Guardmaster safety relays.
03Is it a safety device?
No, the sheet says it is not intended for safety-related control or diagnostics.
04What supply does it need?
24V DC within 11 to 26.4V DC.
05Does it support ring topology?
Yes, star, tree, daisy-chain and ring are listed.
Reviews
There are no reviews yet.