Chapter
3
Operating Instructions
miniTwin2
14
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8013482/YT85/2016-02-23
Subject to change without notice
Product description
3.2.3
Cascading
To provide effective presence detection a maximum of three miniTwin2 can be connected
in series as “cascade”.
The device connected to the control cabinet is the main sensor, called
host
. The subse-
quent sensors are called
guest 1
and
guest 2
. On the host you can configure the Reset
and EDM functions.
The miniTwin2 can be connected together as required and form, without configuration, a
functional cascaded system. After disconnecting cascaded systems to form individual
systems, the individual miniTwin2 can also be used as a standalone devices without
configuration.
Whether a device is used as a cascaded device or as a standalone device is defined by the
connection plug.
Check the effectiveness of the protective device after any change to a system using
the test rod!
Check the effectiveness of the protective device as described in section 6.7 “Test notes”
on page 56.
Benefits of cascading
no additional external circuitry required, quick to connect
resolution and protective field height may differ among the individual systems
Limits of cascading
The maximum protective field width must be guaranteed for each individual system!
The maximum cable length between two cascaded systems must not exceed 3 metres.
You must maintain a minimum distance between the protective fields on the miniTwin2
host and miniTwin2 guest 2 (see section 4.1.3 “Minimum distance for cascaded
systems” on page 26).
Fig. 3: Cascading of the
miniTwin2 safety light curtain
WARNING
Guest 2
Guest 1
Host
