Specifications

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SIMATIC FS400 light curtains

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Siemens IK PI · 2009

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Function (continued)

3-sensor direction muting

Three-sensor direction muting is configured in a similar way to

2-sensor parallel muting. Material can only be transported

through the light curtain in one direction. To trigger the muting

function, muting sensor M1 must first be activated, followed

by muting sensors M2 and M3. If the paths for muting sensors

M2 and M3 are interrupted, sensor M1 does not need to be

activated.

Parallel muting with 4 sensors

4-sensor parallel muting can be used advantageously wherever

• the transported material is too small to be acquired simulta-

neously by 4 sensors arranged sequentially,

• the available space is too small even for the crossover light

beams of 2-sensor parallel muting.

The function of 4-sensor parallel muting corresponds to that of

2-sensor parallel muting with the additional characteristic of the

muting activation signal being obtained from two sensor pairs.

Muting is triggered when within a 2.5 s interval, M2 is activated

with M3 or M1 is activated with M4.

Transceiver

The transceiver comprises a transmitter and receiver in a single

unit. The infrared light of the transmit diode is reflected twice

through 90° so that it returns to the receive diode of the trans-

ceiver. This creates a twin-beam light barrier that is more cost ef-

fective than conventional light barriers with separate transmitters

and receivers. 3RG78 45 series transceivers have integrated

contactor control and startup/restart inhibit. 3RG78 44 and

3SF78 44 series transceivers have additional integrated muting

functions. These devices include five 5-pin M12 sockets on the

front panel, to which the muting sensors can be directly con-

nected.

Cascading of devices: Host/guest combinations

Cascading of devices refers to lengthening the optical axis and

therefore the protective zone height, whereby protection on the

horizontal and vertical levels can be realized at the same time

using a flexible connecting cable between the host and guest

device. The safety outputs and the processor tasks are located

in the host device so that the guest devices can be connected

regardless of the function package or outputs.

The standard cable that can be used to connect the host to the

guest is already installed on the guest device. The host comes

with the appropriate M12 socket on its underside. Host devices

can only be operated together with a guest device.

The guest devices are from the 3RG78 42 series, but they

are also suitable for the 3SF78 42, 3RG78 44, 3SF78 44 and

3RG78 45 series. The guest device resolution can be combined

with any other resolution (e.g. the host device can have a 14 mm

resolution while a 30 or 50 mm resolution is sufficient for the

guest device.

PC software

PC software can be used to visualize and record the function of

the light curtains.

SafetyLab is the diagnostic and parameterization software for

3RG78 44 / 3SF78 44 light curtains, light grids and transceivers.

SafetyLab can be used for all available light curtain and light

grid function packages as of firmware Version 3.10:

• Blanking function package

• Muting function package

• Sequence control function package

The firmware version of the receiver is indicated on the

7-segment display during start-up.

Mounting sets

To facilitate installation, alignment, commissioning and trouble-

shooting, a practical accessories package containing mounting

columns, reflecting mirror columns, reflecting mirrors, mounting

supports and laser alignment tools is available.

Start

Danger zone

Start

Danger zone