Unique Worldwide Two-Hand Device
SafeballTM is a completely new approach to the design of one and two-hand safety devices. Instead of the conventional approach using ordinary push-buttons and non-ergonomic protection for unintentional activation, a 'hands on' approach has been developed. SafeballTM consists of a spherical ball containing two embedded pushbutton switches, one on each side of the ball. By using this pushbutton configuration, the risk of unintentional activation is minimized and the device is simple and ergonomic to use.
SafeballTM can be utilized for either one-hand (one SafeballTM) or two-hand (two SafeballsTM) applications. In either application, and in order to meet the required level of safety, the Safeball(s)TM switches are monitored by specified/certified JOKAB SAFETY Safety relays.
In the case where Two hand control is used, both SafeballsTM i.e. all four push-buttons have to be activated within 0.5 seconds. If one or more pushbuttons are released a Stop signal is given to the machine. In order to provide the highest level of safety the SafeballTM design provides the operator with a dual switching function and short circuit supervision in each hand.
Each SafeballTM is ergonomically designed and has both its cover and actuator made of environmental friendly polypropylene. The design allows for comfort of use for all hand sizes and operation from numerous gripping positions. Mounting of the SafeballTM is also very flexible allowing the device to be mounted in the most ergonomic position for the operator.
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Applications:
- Two-Hand Device
- One-Hand Device
Features:
- Ergonomic
- Low activation force
- Flexible mounting
- Several grip possibilities
- Highest safety level (category 4)
- Two-channel switching in each hand Highest Safety Level
The SafeballTM is certified by DNV in Sweden for use as a Two hand control device, when used with a JSBR4 JOKAB SAFETY Safety relay, according to the highest safety level in standard EN 574 (type IIIc) and EN 954-1 (safety category 4).
When can a two-hand or one-hand control be used?
A two-hand control can be used when it is necessary to ensure that the operator is outside and must be prevented from reaching into the hazardous area. If the operator decides, after the start signal has been given to the machine, to make an 'after grasp' i.e. try to adjust the part that has been placed into the machine, then a dual stop signal is given to the machine.
A one-hand control device can be used when the operator cannot reach the hazardous area with his/her free hand or on less dangerous machines.
JSTD25A Mounting Station
Regulations and Standards
The JSTD1 SafeballTM is certified by DNV. Approval numbers are 01-MAL-CM-0101(two-hand device) and 01-NAL-CM-0100 (one-hand device).
Approvals
  
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