MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC
8540780 • 25/01/2023 • Rev.43 47
SAFETY RELAYS (MR2, MR4, MR8, MOR4, MOR4S8)
Characteristics of the output circuit
The MR2/MR4/MR8 units use guided contact safety relays, each of which provides
two N.O. contacts and one N.C contact in addition to the N.C. feedback contact.
The MR2 unit uses two safety relays, the MR4 uses four and the MR8 uses eight.
The MOR4/MOR4S8 units use four guided-contact safety relays. Each relay provides
one NO contact monitored by the module logic through internal FBK contact.
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Refer to the "RELAY" section to check the possible MOR4/MOR4S8 operation modes configurable
with MSD software.
Minimum switchable voltage
Minimum switchable current
Maximum switchable voltage (DC)
Maximum switchable voltage (AC)
Maximum switchable current
Mechanical life of contacts
Table 26
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To guarantee correct isolation and avoid the risk of premature ageing of or damage to the relays,
each output line must be protected using a fast acting 4A fuse and the load characteristics must
be consistent with those specified in Table 12.
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See the "Characteristics of the output circuit" section (for further details on these relays).
MR2/MR4/MR8 internal contacts diagram
Figure 14
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