Bently Nevada 3500/20 Rack Interface Module

Bently Nevada 3500/20 Rack Interface Module

The Rack Interface Module (RIM) is the primary interface into the 3500 rack. It supports a Bently Nevada proprietary protocol used to configure the rack and retrieve machinery information. The RIM must be located in slot 1 of the rack(next to the power supplies). The RIM provides the connections needed to support current Bently Nevada Communications Processors (Transient Data Interface External (TDIX) and Dynamic Data Interface External (DDIX)). Although the RIM does provide certain functions common to the entire rack, the RIM is not part of the critical monitoring path. The RIM's operation (or non-operation) has no effect on the proper, normal operation of the overall monitoring system.

For TMR applications, the 3500 system requires a TMR version of the RIM. In addition to all the standard RIM functions, the TMR RIM also performs "monitor channel comparison." The 3500 TMR configuration executes monitoring voting using the setup specified in the monitor options. Using this method, the TMR RIM continually compares a specified output of 3 redundant monitors. If the TMR RIM detects that the information from one of those monitors is no longer equivalent (within a configured percent) to the remaining two, it will flag the monitor as being in error and place an event in the System Event List.