Reer MOSAIC M1 - OSSD SAFETY OUTPUTS; Important note concerning OSSD Safety Outputs; OSSD (MOSAIC M1, MI8 O2, MO2, MO4); OSSD (MOSAIC M1 S, MOSAIC M1 S COM, MI8 O4, MO4 L)

MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC
8540780 • 10/07/2020 • Rev.38 43
English
SAFETY RELAYS (MR2, MR4, MOR4, MOR4S8)
Characteristics of the output circuit.
The MR2/MR4 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 and the MR4 uses four.
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.

Refer to the "RELAY" section to check the possible MOR4/MOR4S8 operation modes
configurable with MSD software.
Excitation voltage
17...31 VDC
Minimum switchable voltage
10 VDC
Minimum switchable current
20 mA
Maximum switchable voltage (DC)
250VDC
Maximum switchable voltage (AC)
400VAC
Maximum switchable current
6A
Response time
12ms
Mechanical life of contacts
> 20 x 10
6
Table 26

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.

See the "MR2/MR4" section (for further details on these relays).
MR2/MR4/MR8 internal contacts diagram
Figure 11