Why Choose the ABB SENTRY TSR20P Safety Relay?
The ABB SENTRY TSR20P (2TLA010061R0001) is a compact and reliable timed safety relay with OFF-delay functionality designed for monitoring safety devices in industrial machinery and automation systems. As part of the ABB Sentry safety relay series, the TSR20P combines safety monitoring with delayed relay outputs for applications where controlled stopping or delayed disconnection is required.
This safety relay operates from a 24 V DC supply and provides 3 normally open (3NO) + 1 normally closed (1NC) delayed relay outputs. Its OFF-delay can be selected between 0.5 s and 1.5 s using a switch on the front panel, providing a straightforward method of configuring the required delay without external timing equipment.
The TSR20P is suitable for monitoring safety devices with contacts using one or two equivalent channels, as well as safety devices with OSSD outputs. Detachable push-in spring terminals simplify control-panel wiring, while its slim 22.5 mm-wide housing helps conserve DIN-rail space in industrial safety systems.
Key Advantages
- Compact OFF-delay safety relay for industrial machinery safety circuits.
- 24 V DC supply compatible with common industrial control systems.
- 3NO + 1NC delayed relay outputs for flexible safety-related switching.
- Selectable 0.5 s or 1.5 s OFF-delay via the front-panel switch.
- Supports safety devices with contacts and OSSD outputs.
- Push-in spring terminals simplify installation and maintenance.
- Suitable for safety applications up to PL e / SIL 3.
Key Features
- ABB Sentry TSR20P safety relay.
- ABB order code 2TLA010061R0001.
- 24 V DC rated control supply.
- 3 normally open + 1 normally closed delayed relay outputs.
- OFF-delay timer function.
- Selectable delay times of 0.5 s or 1.5 s.
- Monitoring of safety devices with one or two equivalent channels.
- Compatible with safety devices featuring OSSD outputs.
- Detachable push-in spring connection terminals.
- Compact 22.5 mm-wide housing for control-panel installation.
Reliable OFF-Delay Safety Control for Industrial Machinery
OFF-delay safety relays allow safety-related outputs to remain energised for a defined period after the monitored safety condition changes. This functionality is useful where machinery requires a controlled stopping sequence or where selected equipment must continue operating briefly before safe disconnection.
The ABB SENTRY TSR20P combines this timed functionality with safety-device monitoring in a compact DIN-rail format. Its selectable 0.5 s or 1.5 s delay, 3NO + 1NC relay configuration and support for both contact-based and OSSD safety devices make it suitable for integrating timed safety functions into modern machine control systems.
Typical Applications
- Industrial machinery requiring timed safety shutdown.
- Controlled stopping sequences for rotating machinery.
- Safety gates and interlocking systems.
- Emergency-stop and machine safety circuits.
- Safety sensors and devices with OSSD outputs.
- Automated production and material handling equipment.
- OEM machinery and industrial control panels.
