Allen-Bradley – 440R-EM4R2D (Guardmaster EMD) – Safety Relay Expansion Module

Category & Compatibility: Guardmaster series expansion module (EMD type) designed to work with R-S/MSR safety relays; requires a Single Wire Safety (SWS) host relay input  

Delayed Safety Outputs: Equipped with  normally‑open (NO) safety-rated relay outputs, configurable for on‑delay, off‑delay, or jogging timing modes via front-panel rotary switches  

Safety Input/Output:

• SWS input for receiving safety logic from the master relay

• SWS output to chain and expand additional Guardmaster modules  

Power Supply:  V DC typical, draws around . W  

Construction: Slim DIN-rail mountable module (approx. . mm wide), IP with removable screw terminals; operating range – °C to + °C  

Safety Standards:

• SIL  / PLe, Cat compliance per EN ISO ‑ and IEC 

• Certified to IEC ‑, EN ISO , UL, TÜV, CE