Preventa Safety Modules Two Hand Page 4 Type XPSBAE

4 Operating principle, selection, references Preventa safety modules Type XPSBAE For electrical monitoring of two-hand control stations Operating principle Two-hand control stations are designed to provide protection against hand injury. They require machine operators to keep their hands clear of the dangerous movement zone. The use of two-hand control is an individual protective measure, which can safely protect only one operator. Separate two-hand control stations must be provided for each operator in a multiple-worker environment. Safety modules XPSBAE for two-hand control stations comply with the requirements of European standard EN 574/ ISO 13851 for two-hand control systems. The control stations must be designed and installed such that they cannot be activated involuntarily or easily rendered inoperative. Depending on the application, the requirements of type C standards specific to the machinery involved must be met (additional personal protection methods may have to be considered). To initiate a dangerous movement, both operators (two-hand control pushbuttons) must be activated within an interval y 0.5 s (synchronous activation). If one of the two pushbuttons is released during a dangerous operation, the control sequence is cancelled. Resumption of the dangerous operation is possible only if both pushbuttons are returned to their initial position and reactivated within the required time interval. The safety distance between the control units and the hazardous zone must be sufficient to ensure that when only one operator is released, the hazardous zone cannot be reached before the dangerous movement has been completed or stopped. Maximum achievable safety level b PL c/Category 1 conforming to EN/ISO 13849-1 b SILCL1 conforming to EN/IEC 62061 Product certifications b UL b CSA b TV XPSBAE pppp P XPSBAE pppp C References Description Type conforming to standard EN 574 Connection Number of safety circuits Additional outputs Supply Reference Weight kg/ lb Safety modules for electrical monitoring of two-hand control stations III A Captive screw clamp terminals Terminal block removable from module 1 NO 1 NC a and 24 V c XPSBAE5120P 0.100/ 0.220 a 115/230V XPSBAE3920P 0.100/ 0.220 Spring terminals Terminal block removable from module 1 NO 1 NC a and 24 V c XPSBAE5120C 0.100/ 0.220 a 115/230V XPSBAE3920C 0.100/ 0.220 Selection Requirements of standard EN 574/ISO 13851 Type I Type II Type III A B C Standard EN 574/ ISO 13851 defines the selection of two-hand controls according to its behavior. The following table details the 3 types of two-hand control conforming to EN 574/ISO 13851. For each type, it lists the operating characteristics and minimum requirements. Use of both hands (simultaneous action) Link between input and output signals Output signal inhibited Prevention of accidental operation Tamper-proof Output signal reinitialised Synchronous action (specified time limit) Use of proven components (Category 1 conforming to EN/ISO 13849-1) XPSBAE Redundancy with partial error detection (Category 3 conforming to EN/ISO 13849-1) XPSBCE XPSBF Redundancy + Self-monitoring (Category 4 conforming to EN/ISO 13849-1) XPSBCE XPSBF Two-hand control station XY2SB pp Conforming to standard EN/ISO 13849-1 Meets the requirements of standard EN 574/ISO 13851 2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10

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