Key Technical Parameters
Electrical & Safety Ratings
Product / Model: ABB Sentry SSR10 24VDC Safety Relay
Part Number: 2TLA010050R0000
Supply Voltage: 24 V DC
Safety Output Contacts: 3 Normally Open (NO) + 1 Normally Closed (NC)
Output Current Capacity: Up to ~6 A (typical maximum rated current per contact set)
Reset Mode: Manual or Automatic selectable by front switch
Monitored Inputs: Safety devices with contact inputs or OSSD outputs
Reset Function: Selectable manual/automatic
Safety Performance: Suitable for use in safety circuits requiring high integrity (e.g., PLe / SIL3 systems)
Mechanical & Installation
Mounting: DIN rail TH35‑15 or TH35‑7.5 (IEC standard)
Terminals: Screw terminals for secure wiring
Degree of Protection: IP20 (protects against solid objects)
Construction Width: ~22.5 mm (1 module)
Dimensions (approx): Height ~120 mm × Depth ~120 mm
Weight: ~0.20 kg
Typical Use & Applications
Emergency stop monitoring
Safety gate and interlock monitoring
Safeguarding of machinery and automation systems
Use with contact safety devices and OSSD output sensors
Panel and control cabinet installation
The ABB Sentry SSR10 24VDC is a safety relay designed for use in machine and industrial safety circuits. It monitors safety devices such as emergency stop buttons, safety gate switches, and safety sensors with contact or OSSD outputs, and provides safe output switching to control downstream devices. The unit has a 24 VDC control supply and allows selection between manual or automatic reset using a front‑mounted switch. It is typically mounted on a DIN rail and used where reliable safety monitoring is required in automation and machine systems up to high safety levels.