Allen-Bradley 440R-D22R2 Guardmaster DI Dual-Input Safety Relay, 24V DC, 2NO + PNP Aux
Allen-Bradley 440R-D22R2 is a Guardmaster dual-input (DI) safety relay that evaluates two dual-channel universal inputs from a 24V DC control supply and switches two normally open safety contacts together with a PNP auxiliary output.
Overview
The two universal inputs accept emergency-stop buttons, interlock switches, optoelectronic protective equipment, tactile sensors and valve monitoring circuits, and the AND/OR logic between inputs is configurable. Safety outputs are rated UL C300 with AC-15 capability of 1.5 A at 250V AC and DC-13 capability of 2 A at 24V DC (0.1 Hz), with an aggregate output current of 6 A maximum per module; a single-wire safety (SWS) output is provided with 50 mA continuous and 700 mA surge current for 5 ms. The relay carries a performance level up to e with hardware fault tolerance of 1 and an MTTFd of 355 years, withstands 2500 V impulse voltage, and mounts on a 35 mm DIN rail with screw terminals accepting 0.2…2.5 mm2 (24…14 AWG) wire.
Key Features
- Guardmaster dual-input (DI) safety relay, configurable AND/OR input logic
- 2 dual-channel universal inputs; 24V DC control supply (20.4…26.4V DC)
- 2 N.O. safety contacts + 1 PNP auxiliary output (50 mA max)
- UL C300; AC-15 1.5 A at 250V AC / DC-13 2 A at 24V DC; 6 A aggregate per module
- Performance level up to e (Cat. up to 4), PFHd 4.35E-09, MTTFd 355 years
- Single Wire Safety in/out: 50 mA continuous, 700 mA surge (5 ms)
- Impulse withstand 2500V; IP40 (NEMA 1) enclosure, IP20 terminals; 35 mm DIN rail
Technical Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Product Line | Guardmaster Safety Relays (440R) |
| Part Number / Catalog No. | 440R-D22R2 |
| UPC | 885630102207 |
| Product Type | Dual-Input Safety Relay (DI) |
| Rated Control Supply Voltage | 24 V DC (20.4…26.4V DC) |
| Power Consumption | 2.5 W |
| Evaluation Inputs | 2 dual-channel universal inputs |
| Configurable Logic | AND / OR |
| Safety Outputs | 2 N.O. (safety contacts) |
| Auxiliary Outputs | 1 x PNP semiconductor, 50 mA max |
| Continuous Safety Output Current | UL C300; AC-15: 1.5 A at 250V AC; DC-13: 2 A at 24V DC (0.1 Hz) |
| Aggregate Output Current, Max | 6 A per module |
| SWS Output Current | 50 mA continuous; 700 mA surge (5 ms max) |
| Impulse Withstand Voltage | 2500 V |
| Safety Parameters | PL up to e; Category up to 4; PFHd 4.35E-09; MTTFd 355 years; SFF 99%; HFT 1 |
| Feedback Circuit | Supported |
| Muting Function | Not supported |
| Wire Size | 0.2…2.5 mm2 (24…14 AWG) |
| Type of Electric Connection | Screw connection |
| Mounting | 35 mm DIN Rail |
| IP Protection | IP40 (NEMA 1) enclosure; IP20 terminals |
| Dimensions | 13 x 13 x 4 cm (5.1 x 5.1 x 1.6 in) |
| Weight | 0.56 lbs (0.26 kg) |
| Country of Origin | Multiple (varies by manufacturing location) |
| Estimated Lead Time | 5 days |
| Standard Warranty | 1 year |
| Condition Options | New (Original Packaging) |
Applications
The 440R-D22R2 suits guard-door and light-curtain circuits that need two independent dual-channel evaluation channels in one relay: the configurable AND/OR logic lets two guarding devices share the relay, while the SWS output feeds single-wire-safety downstream devices without extra wiring.
Why Buy from Us
This product is available new in original factory packaging, fully tested and backed by a standard warranty of 1 year. We ship worldwide with careful protective packaging and fast dispatch. Quantity discounts and repair/exchange options are available on request.
Documents
| Resource | Title | Link |
|---|---|---|
| Publication | 440R-IN079 — MSR127T / MSR127TP / MSR127R / MSR127RP Safety Relays Installation Instructions | 440r-in079_-en-p.pdf |
| Publication | 440R-TD001 — Guardmaster Safety Relays Technical Data | 440r-td001_-en-p.pdf |
Certifications
| Certification | Download |
|---|---|
| CE | 440r-ct079_-en-e.pdf |
| China CCC | 440r-ct009_-en-e.pdf |
| Korean KC | 440r-ct054_-en-e.pdf |
| Kosha Approval | 440r-ct077_-en-e.pdf |
| UKCA DOC | 440r-ct080_-en-e.pdf |
Per the Rockwell Automation product certification listing as of 2026-09-23. Please review the product label to confirm the certifications your specific unit carries.
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