Cascading Option - Siemens SIMATIC FS400 Anleitung

3.3

Cascading option

To implement multiple linked protective fields, SIMATIC FS400 3RG7845 light curtains
can be cascaded one after the other via plug-in cable connections. This allows devices
with different resolutions to be combined with each other.
a
b
a = Transmitter, host (M)
b = Transmitter, guest (S)
Fig. 3.3-1: Structure of a cascaded system
Cascading devices makes it possible to implement adjacent protective fields, for rear
area protection without any additional expense for control and connection, for example.
The host system is responsible here for all processor tasks, displays and the receiver-
side interfaces to the machine and control devices.
The following limits must be observed:
The height of the protective field for the first light curtain (host) must be at least
225mm.
Ensure that the required detection range of the cascaded system falls within the
maximum detection range of all individual components.
The number of beams of all components must not exceed 240. For the number of
beams n, for the individual components, please refer to the tables in Chapter 12.
The connection cables between the individual components are part of the guest.
The standard length is 250 mm. The connection to the host is made with an M12
plug.
WARNING
The safety distance must be calculated in accordance with the set resolution and the
response time of the entire system (see, Chapter 6).
130
c
d
c = Receiver, host (M)
d = Receiver, guest (S)