Omron G9SA-501 AC/DC24 Safety Relay Unit

USD 145.16

Omron 24V safety relay. Features 5 safety outputs (NO) and 1 auxiliary output (NC). Compact 45mm DIN-rail mount for monitoring E-stops and safety light curtains in industrial safeguarding systems.

SKU Omron-G9SA-501 AC/DC24 Category
Safety Relays

Omron G9SA-501 AC/DC24 Safety Relay Unit

Model Identifier G9SA-501 AC/DC24
Official Part Number G9SA-501 AC/DC24
GTIN Standard 4547648813952

Technical Overview

The Omron G9SA-501 AC/DC24 is a highly reliable, compact safety relay unit designed for rigorous industrial machine safeguarding applications. Enclosed in a 45mm wide DIN-rail mountable housing, it offers versatile 1 or 2 channel inputs capable of monitoring emergency stop buttons, safety interlock switches, and safety light curtains. Delivering high-performance redundancy, it features five instantaneous safety outputs (5PST-NO) and one auxiliary output (SPST-NC) for feedback. Built to comply with stringent EN ISO 13849-1 PL e and Category 4 standards, this relay ensures fail-safe operations across automation, robotics, and manufacturing environments.

Key Features

  • Safety Outputs: 5PST-NO instantaneous safety contacts (5A max)
  • Auxiliary Output: 1 SPST-NC contact for status monitoring
  • Input Channels: Supports 1 or 2 channels with PNP common input capability
  • Safety Compliance: Certified up to EN ISO 13849-1 PL e / Category 4
  • Compact Housing: 45mm width for easy DIN-rail or surface mounting
  • Temperature Rating: Operates efficiently between -25°C to +55°C
  • Durability: Rated for 5,000,000 mechanical operations and 100,000 electrical operations

24 VAC/VDC with maximum power consumption of 5.7 VA (AC) / 1.7 W (DC)

Technical Specification Matrix

ParameterValue
Operating Voltage24 VAC/VDC (85% to 110% of rated voltage)
Power Consumption5.7 VA max (AC) / 1.7 W max (DC)
Safety Outputs5PST-NO
Auxiliary OutputSPST-NC
Rated Output Current5 A max
Input Current40 mA max (60 mA max rating on some inputs)
Response Time10 ms max
Operate Time30 ms max
Safety CategoryEN ISO 13849-1 PL e / Category 4
Ambient Operating Temperature-25°C to +55°C
Mounting TypeDIN Rail / Surface Mount
Width45 mm

Industrial Applications

1. Emergency Stop (E-Stop) Redundancy Circuits

Utilized to monitor dual-channel emergency stop pushbuttons on high-risk CNC machining centers or hydraulic presses.

Problem Solved

Provides fail-safe redundancy that ensures a machine will halt immediately even if a single contact in the switch welds or fails, fulfilling strict Category 4 safety requirements.

Dual-Channel InputCategory 4PL eE-Stop Circuit5PST-NO

2. Safety Light Curtain Interfacing

Acts as the electromechanical relay interface between a solid-state safety light curtain and the main power contactors of an automated packaging line.

Problem Solved

Safely converts the lower-power PNP outputs of a light curtain into a robust 5-amp, multi-pole electromechanical disconnect, safely dropping power to hazard zones with a response time under 30 ms.

PNP Common Input30 ms Response Time5A Rated OutputFail-Safe DisconnectSafety Interlock

3. Robotic Cell Access Gate Monitoring

Wired to redundant mechanical safety interlock switches on the access doors of a high-speed robotic welding cell.

Problem Solved

Isolates robotic arm power the instant an operator opens the access gate. The SPST-NC auxiliary contact is routed directly into the main PLC to continuously verify relay health and gate status.

Interlock Switch MonitoringSPST-NC Auxiliary Contact24 VAC/VDCDIN-rail MountMachine Safeguarding
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