User's Manual

Doc. No.
Rev.
Date
DRAFT
1.01
2012-01-27
Damm Cellular Systems A/S, Denmark
TetraFlex
®
7.5 Manual - SB421
TetraFlex® 7.5 Manual 1-9
1.1.4.5.9 Redundant SB421 operation
A second SB421 (BSC) may be configured for redundant operation both as 2 carriers and as
3 - 4 carriers.
Note: A HW modification is needed for redundant and/or 3-4 carrier operation. See section
1.1.5 for further information.
1.1.4.5.9.1 LAN Connection
Note: LAN in / out is used for redundant SB421. If redundant SB421 or multi node backbone
is not used, connect cable to WAN part only. If environment permits, Y-splitter may be used
to separate WAN and LAN, otherwise connect one or two Ethernet cables as desired.
For redundant SB421 (BSC) operation, connect the LAN from each SB421 together.
Connection may be straight trough (auto sense) or crossed cable as preferred.
1.1.4.5.9.2 SEC Connection
In addition to the LAN connection, the SEC connection for synchronization must also be
established.
Figure 1-8: SEC Connections
1.1.4.5.10 Temperature sensor (TS) Connection
Terminals for External Battery Pack Temperature Sensor
For installation, refer to 1.1.4.8 or the instructions delivered with the external battery kit
When used, use SW171 on interconnection board to select internal / external battery
temperature sensor
1.1.4.5.11 Alarm Connection
Future use, not yet defined
1.1.4.6 Mains Connection block