Safety Relays (Mr2, Mr4, Mor4, Mor4S8); Characteristics Of The Output Circuit; Mr2/Mr4/Mr8 Internal Contacts Diagram - Reer MOSAIC M1 Installation And Use Manual

MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC

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.

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

8540780 • 10/07/2020 • Rev.38
Excitation voltage
Minimum switchable voltage
Minimum switchable current
Maximum switchable voltage (DC)
Maximum switchable voltage (AC)
Maximum switchable current
Response time
Mechanical life of contacts
Table 26
Figure 11
17...31 VDC
10 VDC
20 mA
250VDC
400VAC
6A
12ms
> 20 x 10
6
43