ABB jsbr4 24dc abb safety relay

Why Choose the ABB JSBR4 24DC 2TLA010002R0000 Safety Relay?

The ABB JSBR4 24DC 2TLA010002R0000 is a versatile dual-channel safety relay designed for monitoring safety devices and controlling hazardous machine functions in industrial automation systems. Part of the ABB Jokab Safety JSB safety relay range, the JSBR4 provides supervised safety inputs and reset functionality for applications including emergency stops, interlocked guards, safety mats, contact strips, enabling devices and two-hand controls.

The relay uses two monitored input channels and internal safety relays K1 and K2 to provide dependable fault detection. Its three normally open safety outputs can be used to disconnect power from contactors, valves or other components responsible for stopping hazardous movement, while an additional normally closed contact is provided for indication purposes. Supervised reset functionality helps prevent unintended restart following faults or operation of a safety device.

Operating from a 24 V DC supply, the JSBR4 provides 3 NO + 1 NC relay outputs with resistive switching capability up to 6 A at 250 V AC. The compact 45 × 74 × 120 mm housing mounts on standard 35 mm DIN rail, making it suitable for integration into industrial machine control panels and safety systems.

Key Advantages

• Versatile dual-channel safety relay for industrial machine safety systems.
• 24 V DC supply for integration into common industrial control circuits.
• 3 NO safety outputs plus 1 NC indication output.
• Suitable for emergency stops, guard switches, safety mats, contact strips and enabling devices.
• Supports two-hand control applications with monitoring of button synchronisation.
• Supervised reset helps prevent unintended machine restart.
• LED indication provides clear monitoring of supply, inputs and outputs.
• Compact 35 mm DIN-rail mounting for control cabinet installation.

Key Features

• ABB Jokab Safety JSBR4 safety relay.
• 24 V DC ±15% rated control supply.
• Dual-channel supervised safety inputs.
• 3 NO + 1 NC relay outputs.
• 6 A at 250 V AC resistive contact switching capacity.
• 6 A at 24 V DC resistive contact switching capacity.
• Maximum total resistive switching current of 12 A distributed across all contacts.
• Supervised manual reset and external device monitoring capability.
• Two-hand control operation requires both buttons to operate within 0.5 s of each other.
• Fast deactivation response time of <20 ms under normal input operation.
• LED indication for electrical supply, inputs and outputs.
• 35 mm DIN-rail mounting with screw-terminal connections.

Reliable Safety Monitoring for Industrial Machinery

Safety relays such as the ABB JSBR4 monitor safety-related control devices and ensure that hazardous machine functions are stopped when a safety circuit is interrupted. The JSBR4 monitors two input channels and uses redundant internal relays to operate its safety outputs, helping detect faults such as open safety circuits, input short circuits and certain external control faults.

The JSBR4 is particularly flexible because it can be applied to multiple machine safety functions. In addition to emergency-stop and guard-monitoring circuits, it can monitor safety mats, contact strips, enabling devices and two-hand controls. Its reset circuit can also supervise external contactors, relays or valves to confirm that controlled equipment has returned to its safe state before another machine cycle is permitted.

Typical Applications

• Emergency-stop safety circuits.
• Interlocked machine guards, gates and hatches.
• Two-hand machine control devices.
• Safety mats and contact strips.
• Hold-to-run and enabling devices.
• Foot-operated safety control devices.
• External contactor, relay and valve supervision.
• Industrial machinery and automated production equipment.