2TLA010051R0101 ABB SENTRY SSR20MP Safety Relay 85–265 V AC / 120–375 V DC 3NO + 1NC

Why Choose the ABB SENTRY SSR20MP 2TLA010051R0101 Safety Relay?

The ABB SENTRY SSR20MP 2TLA010051R0101 is a compact and reliable two-hand control safety relay designed for industrial machinery where both operator controls must be actuated in the required manner before a hazardous machine movement can be initiated. As part of the ABB SENTRY Safety Relays product group, it provides dependable monitoring for two-hand control devices in machine-safety applications.

The SENTRY SSR20MP provides 3 normally open (3NO) and 1 normally closed (1NC) relay outputs and accepts a wide-range supply of 85–265 V AC or 120–375 V DC. Manual or automatic reset can be selected using a switch on the front of the relay, while detachable push-in spring terminals simplify installation, replacement and maintenance within industrial control panels.

With a compact 22.5 mm module width, DIN-rail mounting format and IP20 protection rating, the SSR20MP provides dedicated two-hand safety monitoring while conserving valuable cabinet space. The SENTRY platform supports safety applications up to PL e and SIL 3 when the relay is correctly integrated into a suitably designed machine-safety system.

Key Advantages

• Dedicated safety relay for monitoring two-hand control devices.
• 3NO + 1NC relay outputs for safety-related control and signalling.
• Wide-range 85–265 V AC / 120–375 V DC supply provides installation flexibility.
• Push-in spring terminals simplify control-panel wiring and maintenance.
• Manual or automatic reset selectable from the front of the relay.
• Compact 22.5 mm wide housing helps conserve DIN-rail space.
• No time-delay function for direct two-hand safety monitoring.
• Supports safety applications up to PL e / SIL 3 when correctly incorporated into an appropriate safety system.

Key Features

• ABB SENTRY SSR20MP safety relay.
• ABB order code 2TLA010051R0101.
• Designed for two-hand control device monitoring.
• 3 normally open + 1 normally closed relay outputs.
• 85–265 V AC / 120–375 V DC supply voltage.
• Push-in spring connection blocks.
• Manual or automatic reset selectable by front-mounted switch.
• No time delay.
• IP20 degree of protection.
• DIN-rail mounting for industrial control cabinets.
• 22.5 mm module width.
• Operating ambient temperature range of -25 to +65 °C.

Reliable Two-Hand Control for Industrial Machinery

Two-hand control systems are used on machinery where an operator must actuate two separate control devices in the required manner before a hazardous machine movement can begin. This arrangement helps keep both of the operator's hands away from the hazardous area during initiation of the machine cycle. The ABB SENTRY SSR20MP provides dedicated monitoring for this type of safety function.

The SSR20MP combines dedicated two-hand monitoring with 3NO + 1NC relay outputs and selectable manual or automatic reset. Its wide-range AC/DC power supply makes it particularly flexible for control-panel designs using different supply systems, while push-in spring terminals provide efficient conductor connection for installation and servicing.

Typical Applications

• Two-hand control stations on industrial machinery.
• Presses and forming machinery requiring two-hand initiation.
• Assembly and production machinery.
• Cutting and processing equipment with two-hand controls.
• Machine loading and operator-controlled production cycles.
• Packaging and manufacturing machinery.
• Industrial automation safety systems.
• OEM machine building and control-panel applications.