MX-2100/2104
Installation and Operation Manual
Chapter 1 General Information
Application Considerations
1-21
KPS Module Redundancy
The KPS module supplies the operating voltages to MX-2100. A single KPS module
can provide the full power requirements of an enclosure. However, a second KPS
module may be added. With a redundant KPS module, both modules are
connected to power and share the load when the system is operating. If one
module (or its power source) fails, the second module automatically takes up the
full load and there is no redundancy.
To maximize the protection conferred by the use of redundant power supply
modules, observe the following recommendations:
•
Whenever possible, connect each of the two KPS modules to a different power
circuit. Thus, if the circuit breaker that protects one of the power circuits trips,
the other module continues to receive power.
•
If -48 VDC battery backup is available, install one DC-powered KPS.3 module
and one AC-powered module. Make sure to select power supply modules with
comparable ratings, e.g., KPS.6 and KPS.7.
KML Module Redundancy
The KML module serves as the connecting link between the MX-2100 unit and the
communication channel. For extra protection, a second KML module, not
necessarily of the same type, may be installed in parallel to the primary KML
module. The two KML modules are then connected through two independent
links, which may even follow different paths, to two similar modules located at the
remote end of the link. In the switched backup mode, the two links can be
operated at different data rates.
MX-2100
MX-2100
Modem
Modem
Modem
Modem
Modem
Modem
KML A
KML B
KML A
KML B
Redundant
(Standby) Link
Active Link
I/
O
M
odul
es
I/
O
M
odul
es
Figure 1-10. Redundant MX-2100 System
In this mode, MLA and MLB rates should be the same!
Each KML module is connected to an independent internal bus. The internal buses
reach each I/O module installed in the enclosure, therefore each module has
equal access to each KML module.
Note