Reer MOSAIC M1 - Safety Relays (Mr2, Mr4, Mr8, Mor4, Mor4 S8); Characteristics of the Output Circuit; MR2;MR4;MR8 Internal Contacts Diagram

MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC
8540780 • 25/01/2023 • Rev.43 47
English
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.
➔
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 "Characteristics of the output circuit" section (for further details on these relays).
MR2/MR4/MR8 internal contacts diagram
Figure 14