ABB jsbr4 24ac abb safety relay

Why Choose the ABB JSBR4 24AC 2TLA010002R0200 Safety Relay?

The ABB JSBR4 24AC 2TLA010002R0200 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 can be used with emergency stops, interlocked guards, safety mats, contact strips, enabling devices, foot controls and two-hand control devices.

The JSBR4 uses two monitored input channels and redundant internal relays to provide dependable safety monitoring and fault detection. Three normally open safety outputs are provided for disconnecting contactors, valves or other components responsible for stopping hazardous movement, while an additional normally closed contact is intended for status indication. The monitored reset circuit helps prevent an unsafe restart following operation of a safety device or detection of a fault.

This version operates from a 24 V AC, 50–60 Hz supply and provides 3 NO + 1 NC relay outputs. Its resistive AC switching capacity is up to 6 A at 250 V AC, while the compact 45 × 74 × 120 mm enclosure mounts on standard 35 mm DIN rail for straightforward integration into industrial control panels.

Key Advantages

• Versatile dual-channel safety relay for industrial machine safety applications.
• 24 V AC, 50–60 Hz supply for AC-powered safety control systems.
• 3 NO safety outputs plus 1 NC indication output.
• Suitable for emergency stops, interlocked guards, safety mats, contact strips and enabling devices.
• Supports two-hand control applications with synchronisation monitoring.
• Monitored reset circuit helps prevent unintended machine restart.
• LED indication provides convenient monitoring of supply, inputs and outputs.
• Compact 45 mm wide DIN-rail housing for industrial control cabinets.

Key Features

• ABB Jokab Safety JSBR4 safety relay.
• 24 V AC ±15%, 50–60 Hz control supply.
• Dual-channel supervised safety inputs.
• 3 NO + 1 NC relay outputs.
• 6 A at 250 V AC resistive switching capacity.
• 6 A at 24 V DC resistive switching capacity.
• Maximum total resistive switching current of 12 A distributed across all contacts.
• Monitored manual reset and external device supervision capability.
• Two-hand control operation with a maximum 0.5 s interval between button activation.
• Deactivation response time of <20 ms during normal input operation.
• LED indication for electrical supply, inputs and outputs.
• 35 mm DIN-rail mounting for control panel installation.

Reliable Safety Monitoring for Industrial Machinery

Safety relays such as the ABB JSBR4 monitor safety-related control devices and ensure hazardous machine functions are stopped when the safety circuit is interrupted. The JSBR4 monitors two input channels and uses redundant internal relays K1 and K2 to operate its safety outputs, providing a dual stop signal if the inputs open, a short circuit is detected between the inputs or the electrical supply fails.

The JSBR4 is designed for a broad range of machine safety functions. In addition to emergency-stop and guard-monitoring circuits, it can be used with safety mats, contact strips, enabling devices, foot controls and two-hand devices. Its reset and supervision circuitry can also monitor external contactors, relays or valves before allowing the safety outputs to energise again.

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 controls.
• External contactor, relay and valve supervision.
• Industrial machinery and automated production equipment.