Reer EOS2 A Manual

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Reer EOS2 A Manual Manual pdf 24 page image

EOS2 SAFETY LIGHT CURTAINLEDMEANING TWO-COLOUR (Red/Green) YELLOWSystem power-on. Initial TEST RED ONBREAK condition (A) RED OFFCLEAR condition (B) OFF ONGUARD condition (C) GREEN OFFFAIL condition (Table 18) OFFRED BLINKING 3MASTER : Light curtain free; RED FlashingSLAVE : Light curtain(s) occupiedTable 16 – RX light signals EOS2 (Master)(A) Light curtain occupied - outputs disabled(B) Light curtain free - outputs disabled - awaiting restart(C) Light curtain free - outputs enabledInternal TEST functionAs required according to EN 61496-1, type 2 safety light curtains must be able to checktheir internal circuits at regular intervals for any dangerous faults.The EOS2 with its integrated automatic fault detection system checks correct functioningof the light curtain within a maximum of 0,5s and always after switching from CLEAR toGUARD status.Periodical system TESTEquipment connected downstream of the light curtain can be checked (withoutnecessarily occupying the protected area) using the TEST command on the emitter.This command enables the OSSDs to be switched from ON to OFF as long as it is active.Please see Table 5 for details on how to activate this command.The test function simulates the occupation of the protected area so that correctfunctioning of the devices downstream of the light curtain can be checked by an externalsupervisor (e.g. PLC, control unit, etc.).Î REER recommend to operate a TEST before each work shift.Î The minimum duration of the TEST command must be at least 4 msec.Status of the outputsOn the Receiver of the EOS2 there are two PNP static outputs whose status depends onthe condition of the protected area.• The maximum permissible load for each output is 400mA@24VDC, corresponding to a resistive load of 60Ω.• The maximum OFF-state voltage is < 0,5VDC.• The maximum output current in OFF-state (leakage current) is <2mA.• The maximum load capacity corresponds to 0.82μF@24VDC.The meaning of the status of the outputs is illustrated in the table below. Any short-circuit between the outputs or between the outputs and 24VDC or 0VDC power supply isdetected by the light curtain.SIGNAL NAME CONDITION MEANINGOSSD1English24VDC Light curtain free condition.OSSD2OSSD1 Light curtain occupiedor fault detected condition0VDCOSSD2Table 17 - Status of the outputs8540738 • 2nd December 2009 • Rev.2 23