Allen-Bradley 440L PAC Safety Light Curtain

The GuardShield PAC safety light curtain consists of a nonmatched pair of optic units, i.e. transmitter and receiver with the same number of beams and spacings. The transmitter and receiver operate on +24V DC. The maximum distance between the transmitter and receiver is referred to as the protective field width or range. The protective field height is the distance between the first beam and the last beam in the device. The transmitter emits sequential pulses of infrared light, which are received and processed by the GuardShield PAC receiver. The synchronization of the timing of the emission and reception of infrared light pulses is accomplished optically by the first beam adjacent to the GuardShield PAC’s status LEDs. This beam is referred to as the synchronization beam. Because the GuardShield PAC’s transmitter and receiver are optically synchronized, no electrical connection is required between the transmitter and receiver.