REDU NDA NCY CO NFIGUR AT IO N
REDU NDANCY
26
1TG C908004M0 201
is then available from the Backup MNS Digital Gateway which will become the Primary MNS
Digital Gateway after the switch over.
6.2. Redundancy Configuration
There are three options available to connect DCS or PLC to both MNS Digital Gateway
–
One DCS / PLC Master connected to both MNS Digital Gateway.
–
One DCS / PLC with at least redundant (two) master interfaces
–
Redundant (two) DCS / PLC Master where each is connected to one MNS Digital Gate-
way (see example Figure 21)
6.2.1. Redundant MNS Digital Gateway connection
Both MNS Digital Gateway must be connected via a RS232 Null Modem cable (port Serial 1 on
both MNS Digital Gateway) to enable data synchronization and ensure correct operation
Figure 22 Serial 1 to serial 1 redundant link connections with ferrite core
The length of this cable should not exceed 10 meters
Redun-
dant Link
Cables
2m
1TGE120109R0002
3m
1TGE120109R0003
5m
1TGE120109R0005
10 m
1TGE120109R0010
Ferrite
Core
1TGB000197P0001
Table 6 Serial Redundant Link Cable ordering code