Purpose
The CBM 46 two-hand manual control module connected to specific control buttons protects the operator’s hands from injuries. In all risky situations, the operator’s hands are kept away from the hazardous areas. If a failure concerns either part of these protection devices or the safety related control system:
• accidental start-up must not be possible
• safe operation of the protection device must be ensured
• it must be possible to stop the machine during the hazardous movement
• the control system must immediately stop the machine during hazardous closing strokes and at the end of the operating cycle at the latest in other cases
• the control system must prevent all production cycle start-ups until the fault has been repaired.
Operation
Two connected buttons (“two-hands” control) must be pressed in a time equal to T < 0.5 s to operate a hazardous movement. The control will be cancelled if either button is released during the hazardous movement. The hazardous movement can only continue after the two buttons return to their original positions and are operated again.
Condition / settings
According to accident protection regulations related to motor driven working tools (e.g. presses), a safety control complying with standards ZH 1/456 and ZH 1/457 is required to use a two-hand manual control module. The connected control buttons must be designed and fitted so as to prevent accidental operation or easy deactivation.
The safety distance between the buttons and the hazardous area must ensure that the hazardous area is not reached before the hazardous movement is stopped or completed also if only one button is pressed. The safety distance S is computed according to the press velocity V > 1.6 m/s and stopping time T, which results from the formula S > VT.
Inspections
CBM 46 modules must be regularly inspected at least once a year by an expert. The inspection must be carried out on all components. The results must be written in a report, which is signed by the inspector and kept by the user.
Information
CBM 46 modules must be regularly inspected at least once a year by an expert. The inspection must be carried out on all components. The results must be written in a report, which is signed by the inspector and kept by the user.
Technical specifications
√ Power supply: 24 – 115V. 50 Hz +/- 10%
√Intake power: approximately 15 VA.
√ Bar fitting: DIN 35 mm.
√ Degree of protection: IP 20.
√ Synchronisation time: 500 ms.
√ Rest time: < 20 ms.
√ Assembly position: indifferent.
Technical specifications
√ Safety outputs: 3 override contacts 1 NC + 2NO 8A.
√Relay mechanical life span: 10 x 106 operating cycles.
√ Working temperature range: – 10° + 55 °C.
√ Knock tightness voltage III (4KW) Degree of nominal isolation voltage contamination 300 V.
√ Stiff wire: Max. 2 x 2.5 mm2.
√ Standard wire: Max. 2 x 2.5 mm2 (minimum cross-section area 0.5 mm2).
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