JSBT50(T) Safety Relay/Expansion Relay
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Single Channel Safety Relay
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The JSBT50 is designed to connect safety devices, such as emergency stops, directly in the voltage supply circuit to the relay. Despite a maximum built-in width of only 22.5 mm, the relay is very powerful.
With 3 NO safety outputs, 1 NC, test input and complete internal supervising, the JSBT50 is quite unique. In addition, you can order delayed outputs (JSBT50T).
In order for the safety outputs to close, the supply voltage, by means of an emergency stop button, must be connected to A1 and A2 and the test input closed. After actuation of the relay the test input can be opened again.
The test input is intended to supervise that contactors or valves have dropped/returned before a new start can be permitted. The test input can also be used for starting and the start button can be supervised (Connection Example).
More Outputs
By connecting JSBT50 to a safety relay/PLC it is easy to increase the number of safe outputs. This means that an unlimited number of dangerous machine operations and functions can be stopped from one safety relay/PLC.
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Applications:
- Emergency Stops
- Interlocked Hatches
Features:
- Width 22.5 mm
- LED indication of output
- 3 NO/NC relay outputs
- Test/start input
- 24 VDC
- Single or dual channel
- Quick release connector blocks
- Additional power terminals (JSBT50)
- 1 changeover relay with a double information output (Y14) (JSBT50T)
- Delay times selectable from 0 to 1.5 s (JSBT50T)
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Regulations and Standards
The JSBT50 is designed and approved in accordance with appropriate standards. Examples of such are EN 292-1/2, EN 60204-1, EN 954-1.
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Safety Level
The JSBT50 has a twin and supervised internal safety function. Power failure, internal component faults or external interference cannot result in dangerous functions.
Input via A1 only is not protected from short circuiting and therefore installation is critical for the safety level to be achieved. To achieve a higher safety level, a screened cable can be used and/or connection made to both A1 and A2 (Technical Description).
Connections Examples
For examples of how our safety relays can solve various safety problems, please see the page of Connection Examples.
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Approvals
   
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