Allen-Bradley 440R-N23135-R Guardmaster MSR127RP Safety Relay, 24V AC/DC, Series B

Allen-Bradley 440R-N23135-R is an earlier production revision of the 440R-N23135 Guardmaster safety relay (type MSR127RP, Series B). This revision has been discontinued by the manufacturer and replaced by the current 440R-N23135 series, which it matches functionally and electrically.

Overview

The 440R-N23135-R provides three normally open safety outputs and one normally closed auxiliary output on a 24 V AC/DC control supply with monitored manual reset, accepting 1 N.C., 2 N.C. or light curtain input contacts. Its 22.5 mm wide removable-screw housing clips to a 35 mm DIN rail and accepts wire up to 4 mm². Units supplied are original Allen-Bradley Series B production, marked Made in Germany.

Key Features

• Earlier revision of the MSR127RP safety relay family, Series B
• Discontinued by manufacturer — replaced by 440R-N23135 (current series)
• 24 V AC/DC rated control supply, 50/60 Hz, 2 W
• 3 N.O. immediate safety outputs + 1 N.C. auxiliary output
• Monitored manual reset; input contact 1 N.C., 2 N.C. or light curtain
• Contact rating AC15 250 V 5 A / DC13 24 V 3 A
• Removable screw terminals, 4 mm² wire, 22.5 mm wide, IP40

Technical Specifications

Applications

Typical uses are drop-in replacements in existing Guardmaster installations wired for the original 440R-N23135-R: interlocked guard doors and light-curtain protected access points that require supervised manual reset. For new designs, specify the current 440R-N23135 series.

Why Buy from Us

This safety relay 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.

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