Light Curtain Muting Standard

The timer monitoring the 4 seconds shall be a safety related item.

Light curtain muting standard.

Muting light curtain monitoring relays allow the automatic temporary suspension of the safety function if certain conditions are met. Osha was asked now that the u s. Also the status output for the mute light changes to green. Setup of a muting light curtain.

In normal operation if a light curtain detects an object it causes the safety system to stop any hazardous motion in the hazardous area. 10 ma with edm. A safety light curtain shields a hazardous area for people s access. When there is no access for persons but the access for products must be available a muting light curtain offers a perfect solution.

From the instant the first of the two muting sensors is cleared. Next lets test the mute function. Open or 0 to 3 v short circuit current. The terms muting and blanking are frequently used incorrectly.

With a muting light screen access to a hazardous area is temporarily disabled muting allowing products to enter the hazardous area. First we test the safety light curtain and latch reset with mute off. When using a pnp output cable. When enabled a function block is purple with a 3 second count down timer.

Light curtain with muting two sensor l type and configurable safety relay introduction light curtains are used to detect attempted access to a hazardous area. Incandescent lamp 24 vdc 1 to 5 5 w led lamp load current. 10 to 230 ma can be connected. Muting allows the stock to bend and the operator to move through the light plane without stopping the press brake slide.

Muting for most of the stroke is required since the tooling will interrupt the light curtain during normal stroking of the press. Our standard s difficulty here is that 1910 217 c 3 iii d allows muting on the upstroke and this application requires muting during over a much longer portion of the cycle. Edm input wait input reset input muting input 1 2 override input. Has a standard for this type of safeguarding device that is light curtains does 29 cfr 1910 212 now kick in.

Muting sensors shall be positioned beyond the light curtain in the dangerous area. 29 cfr 1910 212 states point of operation. Safety light curtains can be used in a variety of different modes such as muting blanking and floating blanking depending on the needs of the application. Muting shall be desabled as soon as the light curtain is cleared and not later than 4 seconds max.

After 3 seconds the status output and mute function turn off. In material handling applications material is allowed to pass through the protective field without shutting down the machine.