PS Series: 'T' Self-Muting Light Curtain Simulation
To ensure correct operation of the safety system both mute beams must be blocked by a loaded pallet within approximately 2 seconds of each other and both must remained blocked during the entire period the palletized load is transferring through the light curtain.
Once both cross beams are blocked (and remained blocked) the system will become muted
For increased safety integrity a third mute input is available at the light curtain safety controller. This 3rd signal is normally taken from the conveyor transport system (mute enable). Inclusion of this signal indicates to the safety control that the conveyor is transferring products towards the light curtain detection field, thus instructing the controller to activate a MUTE ON condition during the pallets transfer through the light curtain.
Once both cross beams are blocked (and remained blocked) the system will become muted
For increased safety integrity a third mute input is available at the light curtain safety controller. This 3rd signal is normally taken from the conveyor transport system (mute enable). Inclusion of this signal indicates to the safety control that the conveyor is transferring products towards the light curtain detection field, thus instructing the controller to activate a MUTE ON condition during the pallets transfer through the light curtain.
|
|
T type (entry/exit) light curtains are normally used to safeguard an "In feed" zone or when a loaded pallet (or other recognized component) is required to travel in both directions through the light curtain. The cross-beam intersection point is positioned inside the danger area.
STAGE1: The product approaches the cross-beam sensors of the T type light curtain from the danger area
STAGE2: Once the product blocks both of the cross-beams, the light curtain goes into the mute mode. The light curtains will remain muted as long as the product is blocking the cross-beams and the mute enable signal is applied.
STAGE3: Once the product clears the cross beams of the T type light curtains the safety function of the light curtain will reactivate after a delay.
STAGE1: The product approaches the cross-beam sensors of the T type light curtain from the danger area
STAGE2: Once the product blocks both of the cross-beams, the light curtain goes into the mute mode. The light curtains will remain muted as long as the product is blocking the cross-beams and the mute enable signal is applied.
STAGE3: Once the product clears the cross beams of the T type light curtains the safety function of the light curtain will reactivate after a delay.