Why Choose the ABB SENTRY SSR20 2TLA010051R0000 Safety Relay?
The ABB SENTRY SSR20 2TLA010051R0000 is a compact and reliable 24 V DC safety relay specifically designed for monitoring two-hand control devices in industrial machinery and automation systems. As part of the ABB Sentry safety relay range, the SSR20 combines dependable safety monitoring with straightforward configuration for machine-building and production applications.
The SSR20 provides 3 normally open (NO) and 1 normally closed (NC) relay output, allowing safety-related control of downstream contactors and machine functions. Its reset function can be configured for manual or automatic reset using a selector switch on the front of the relay, simplifying commissioning and adaptation to the required machine safety architecture.
Operating from a 24 V DC supply, the 2TLA010051R0000 uses screw-compression connection blocks and a slim 22.5 mm wide housing for efficient installation on DIN rail inside control cabinets. With support for applications up to Performance Level e (PL e) and Safety Category 4, it provides a robust solution for two-hand safety control on industrial machinery.
Key Advantages
- Purpose-designed safety relay for monitoring two-hand control devices.
- 3 NO + 1 NC relay outputs provide flexible safety-related switching.
- 24 V DC supply voltage suits standard industrial automation systems.
- Selectable manual or automatic reset via a front-mounted switch.
- Supports safety applications up to Performance Level e (PL e).
- Suitable for safety systems designed to Safety Category 4.
- Slim 22.5 mm housing width helps conserve DIN-rail space.
Key Features
- ABB SENTRY SSR20 safety relay.
- 24 V DC supply voltage.
- 3 normally open + 1 normally closed relay outputs.
- Designed specifically for two-hand control monitoring.
- Manual or automatic reset selectable from the front of the unit.
- No integrated time-delay function.
- Screw-compression connection blocks for secure field wiring.
- IP20 degree of protection.
- Supports safety performance up to PL e.
- Compact design for DIN-rail mounting in industrial control panels.
Reliable Two-Hand Safety Control for Industrial Machinery
Two-hand control devices are used on machinery where an operator must keep both hands away from a hazardous area while initiating or maintaining a machine operation. The ABB SENTRY SSR20 monitors the two-hand control inputs and provides safety-related relay outputs for interfacing with the machine's stopping or control system.
The SSR20 combines dedicated two-hand monitoring with configurable manual or automatic reset. Its 3 NO + 1 NC output configuration provides flexible integration with industrial control circuits, while the compact DIN-rail housing makes it practical for new machinery and control-panel upgrades where installation space is limited.
Typical Applications
- Two-hand control stations for industrial machinery.
- Presses and forming machinery.
- Cutting and processing equipment.
- Assembly and production machinery.
- Operator-controlled hazardous machine cycles.
- Manufacturing and factory automation systems.
- OEM machinery and machine-building projects.
- Industrial safety control panels.
