Main Features

Manufacturer: Allen‑Bradley / Rockwell Automation (GuardMaster series)
Model/MPN: R‑EMRD — expansion module (EMD) for safety relay systems
Power Supply:  V DC, consumption ~. W
Inputs:
- Single‑Wire Safety (SWS) input for connection to Master relay/mutations
Safety Outputs:
- × Normally‑Open relay contacts, time‑delayed safety outputs—ideal for sequential operations
Auxiliary Output:
- solid-state auxiliary output (diagnostic), with surge current capability
Mounting & Connections:
- . mm DIN‑rail width, removable screw‑clamp terminals, LED status indicators
Safety & Certifications:
- Meets ISO - PL e (Cat ), IEC SIL , and IEC - standards
- UL recognized, CE marked
Environmental:
- Operating temp: – °C to + °C; IP housing; rugged industrial build
Performance Specifications:
- Aggregate safety output current: up to  A; individual output  A @ VDC
- Time delay adjustable (~.× to × scale, max ~ s) with integrated selector dial

Allen-Bradley – 440R-EM4R2D – GuardMaster Expansion Module with 4 Delayed Safety