Why Choose the ABB Sentry USR22 24VDC 2TLA010070R0400 Safety Relay?
The ABB Sentry USR22 24VDC 2TLA010070R0400 is an advanced universal configurable safety relay and safety timer designed for demanding industrial machinery and automation applications. Part of ABB's Sentry USR safety relay family, the USR22 provides flexible monitoring for safety devices with contacts, OSSD outputs, two-hand controls, safety mats, safety edges and bumpers.
Operating from a 24 V DC supply, the USR22 provides 2 NO immediate failsafe relay outputs plus 2 delayable NO failsafe relay outputs. The configurable timer can be adjusted from 0–999 s with accuracy better than 1%, supporting OFF-delay, ON-delay, time bypass and time reset functions for sophisticated machine stopping and restart sequences.
An integrated front display simplifies configuration and troubleshooting by providing operating information, error codes and an error log. Custom configurations can be password protected, while manual or automatic reset can be selected according to the safety application. The 2TLA010070R0400 version uses screw terminals and a compact 22.5 mm wide DIN rail housing, providing powerful safety functionality in a space-efficient format.
Key Advantages
- Advanced universal configurable safety relay and safety timer.
- 24 V DC supply for standard industrial safety-control systems.
- 2 NO immediate + 2 NO configurable delayed failsafe outputs.
- Wide adjustable timing range of 0–999 s.
- Timer accuracy of better than 1%.
- Selectable OFF-delay, ON-delay, time bypass and time reset functions.
- Supports contact-based, OSSD, two-hand and pressure-sensitive safety devices.
- Front display simplifies configuration, diagnostics and troubleshooting.
- Password protection helps prevent unauthorised configuration changes.
- Manual or automatic reset selectable to suit the machine safety function.
- Safety performance up to Performance Level e (PL e).
- Compact 22.5 mm DIN rail housing saves control-panel space.
Key Features
- ABB Sentry USR22 universal safety relay.
- Manufacturer part number 2TLA010070R0400.
- 24 V DC rated supply voltage.
- 2 NO immediate failsafe relay outputs.
- 2 NO configurable delayed failsafe relay outputs.
- 0–999 s configurable timer range.
- Timer accuracy better than 1%.
- OFF-delay timer function.
- ON-delay timer function.
- Time bypass function.
- Time reset function.
- Monitoring of safety devices with one or two equivalent channels.
- Monitoring of safety devices with antivalent channels.
- Compatible OSSD safety-device monitoring.
- Two-hand control monitoring.
- Safety mat, edge and bumper monitoring.
- Emergency-stop and gate-switch monitoring.
- Integrated display with error codes and error log.
- Password-protected custom configuration.
- Manual or automatic reset selection.
- Screw-terminal connection technology.
- IP20 degree of protection.
Configurable Safety Monitoring and Precision Timing
The ABB Sentry USR22 combines universal safety-device monitoring with configurable timing in a single compact relay. Its two immediate safety outputs can respond directly to the monitored safety condition, while the two additional normally open outputs can be configured with timing functions between 0 and 999 s. This enables machine designers to implement controlled shutdown, delayed start, temporary bypass and timed reset functions without installing separate external timer relays.
The USR22 can monitor a broad range of protective devices, including emergency-stop switches, guard switches, OSSD devices, two-hand controls and pressure-sensitive safety products. The integrated display guides configuration and provides diagnostic information, including error codes and an error history, while password protection can secure custom settings against unauthorised adjustment.
Typical Applications
- Emergency-stop safety circuits.
- Safety gate and guard-switch monitoring.
- Light curtains and other OSSD safety devices.
- Two-hand machine control systems.
- Safety mats, edges and pressure-sensitive bumpers.
- Controlled machine stopping sequences.
- Timed motor and drive shutdown.
- Delayed machine start and restart functions.
- Time-bypass safety applications.
- Production and packaging machinery.
- Robotic and automated manufacturing cells.
- Conveyor and material-handling equipment.
- Industrial control panels requiring configurable safety timing.
