ABB JSR2A expansion relay 10A 24AC/DC

Why Choose the ABB JSR2A 2TLA010027R0100 Safety Expansion Relay?

The ABB JSR2A 2TLA010027R0100 is a high-capacity safety expansion relay designed to increase the number of safety outputs available from a compatible safety relay in industrial machinery and automation systems. Part of the ABB Jokab Safety JSR range, the JSR2A combines redundant relay operation with high switching capacity, making it particularly suitable where additional safety contacts are required for contactors, valves and other safety-related equipment.

The JSR2A is connected to and monitored by a suitable safety relay and can be configured for either single-channel or dual-channel operation. Its mechanically positively guided internal relays provide reliable fault monitoring, while the monitoring circuit allows the controlling safety relay to verify that both internal relays have returned to their safe state before permitting a new machine start.

Operating from a 24 V AC/DC supply, the JSR2A provides 4 NO safety outputs plus 1 NC information output. Its high-capacity contacts can switch resistive loads up to 10 A at 24–115 V AC or 8 A at 230 V AC, making this expansion relay suitable for demanding industrial machine safety applications.

Key Advantages

• High-capacity safety expansion relay for increasing safety system outputs.
• 24 V AC/DC supply provides flexible integration into industrial control systems.
• 4 NO safety outputs plus 1 NC information output.
• Resistive switching capacity up to 10 A at 24–115 V AC.
• Supports both single-channel and dual-channel connection.
• Mechanically positively guided relay contacts enable reliable monitoring.
• Safety performance up to PL e / Category 4 / SIL 3 when correctly incorporated into a suitable safety system.
• Detachable connector blocks simplify installation and maintenance.

Key Features

• ABB Jokab Safety JSR2A safety expansion relay.
• 24 V AC/DC supply.
• 50–60 Hz AC supply frequency.
• 4 NO + 1 NC relay outputs.
• Up to 10 A resistive AC switching capacity at lower AC voltages.
• 8 A at 230 V AC resistive switching capacity.
• 8 A at 24 V DC resistive switching capacity.
• Maximum total resistive switching current of 16 A distributed across all contacts.
• Single-channel or dual-channel operation.
• Activation response time of <15 ms.
• Deactivation response time of <25 ms.
• LED indication for supply and output relay status.
• 35 mm DIN-rail mounting with detachable connector blocks.

High-Capacity Safety Output Expansion for Industrial Machinery

Safety expansion relays such as the ABB JSR2A increase the number of safety contacts available from an existing safety relay. When its safety inputs are energised, the redundant internal K1 and K2 relays operate the output contacts. If the inputs open or the power supply fails, both internal relays drop out and the safety outputs return to their de-energised state.

The JSR2A is designed to be monitored by the safety relay it expands. Monitoring terminals can be connected to the test or reset circuit of the controlling safety relay so that the condition of the positively guided internal relays is checked before another ready signal is permitted. This provides a practical way to add high-capacity outputs while maintaining the required safety architecture.

Typical Applications

• Expanding the outputs of industrial safety relays.
• Emergency-stop systems requiring additional safety contacts.
• Machine guard and interlock safety circuits.
• Control of multiple safety contactors.
• Safety-related valve and actuator control.
• Industrial machinery and automated production equipment.
• Manufacturing and material handling systems.
• Control panels requiring additional high-capacity safety outputs.