Parker EME Compax3 device description192-120114 N5 C3I22T11 June 2008 913.11.2.2 Safety notes and limitations of the STO function in theCompax3M The STO safety function must be tested and protocoled as described (see page98). The safety function must be requested at least once a week. In safety doorapplications, the weekly testing interval must not be observed, as you can assu-me that the safety doors will be opened several times during the operation of themachine. The CompaxeM with integrated STO safety function as well as the utilized safetycontrol devices must be mounted protectedly (IP54 control cabinet). Only qualified staff members are permitted to install the STO function and place itin service. The X9/2 (GND24V) terminal on the Compax3MPxx mains module must be con-nected to the PE protective lead. This is the only way to ensure protection againstincorrect operation through earth faults (EN60204-1 Section 9.4.3)! All conditions necessary for CE conform operation (see page 16) must be ob-served. It should be noted in connection with the STO application examples illustratedhere that after the Emergency Power-off switch has been activated, no galvanicisolation in accordance with EN 60204-1 Section 5.5 is guaranteed. This meansthat the entire system must be disconnected from the mains power supply with anadditional main switch or mains power contactor for repair jobs. Please note inthis regard that even after the power is disconnected, dangerous electrical volta-ges may still be present in the Compax3 drive for about 5 minutes. When using an external Emergency power-off module with adjustable delay time,(as illustrated in the STO application example), it must be ensured that the delaytime cannot be adjusted by persons not authorized to do so (for example by ap-plying a lead seal). With the UE410-MU3T5 safety control, this is not necessary, ifthe anti manipulation measures are respected.The adjustable delay time on the Emergency Power-off module must be set to avalue greater than the duration of the braking ramp controlled by the Compax3with maximum load and maximum speed. If there are external forces operating on the drive axes, additional measures arerequired (for example additional brakes). Please note in particular the effects ofgravity on suspended loads! This must be respected above all for vertical axeswithout self-locking mechanical devices or weight balance. During the active braking phase of Stop category 1 (controlled bringing to a stopwith safely monitored delay time according to EN60204-1) or safe stop 1, faultyfunction must be expected. If a fault in the drive system occurs during the activebraking phase, the axis may trundle to a stop unguidedly or might even activelyaccelerate until the expiry of the defined switch-off time. When using synchronous motors, a short movement over a small angle is possi-ble, if two faults occur simultaneously in the power section. This depends on thenumber of pole pairs of the motor (rotary types: 2 poles = 180°, 4 poles = 90°, 6poles = 60°, 8 poles = 45 °, Linear motors: 180° electrically). For synchronous motors operated in the field weakening range, the operation ofthe STO function may lead to overspeed and destructive, life-threatening overvol-tages as well as explosions in the servo controller. Therefore, NEVER use theSTO function with synchronous drives in the field-weakening range. It is important to note that if the drive is being activated (Energize) by the USB /RS485 interface, it may not be possible to execute switch-off by a controlled bra-king ramp. For example, this is true when the set-up window of the C3 ServoMa-nager is used. If set-up mode is turned on or with the imput simulator, the digitalI/O interface and fieldbus interface are automatically disabled.
