3500/34 TMR Relay Module 125696-01 Bently Nevadar

Description

For applications that require extremely high availability comparable to safety instrumented systems described in ISA S84.01-1996, the 3500 Series Machinery Protection System supports a Triple Modular Redundant (TMR) Relay Module. The TMR Relay Module uses three independent relays to drive a single relay output. The TMR Relay Module works in conjunction with a special TMR Rack Interface Module and three monitor modules to provide 2-out-of-3 voting for inputs.  

Each relay utilized on the TMR Relay Module includes "Alarm Drive Logic". The Alarm Drive Logic is programmed using AND and OR logic, and can utilize alarming inputs (alerts and dangers) from any monitor channel or any combination of monitor channels in the rack. This Alarm Drive Logic programming uses the 3500 Rack Configuration Software to meet the specific needs for the application.

How the TMR Relay Module functions:

The 3500/34 TMR Relay Module consists of two main components:  the TMR Relay Module (quantity of two) and the TMR Relay I/O Module.  Once programmed, the two TMR Relay Modules perform the same functions in parallel, effectively providing redundant functionality between the two.

The following describes the purpose of each component (see Figure 3):

TMR Relay Module:  The TMR Relay Module drives 3 independent Alarm Contact Signals for each of the 4 relay channels, based on the user-programmed Alarm Drive Logic.  Alarm Drive Logic is programmed for each relay channel via the 3500 Rack Configuration Software.   Within a TMR Rack, three monitors simultaneously provide the alarm signals (Channel Alerts, Channel Dangers, Monitor Alerts, etc.) used for this Alarm Drive Logic via three separate data paths.  The TMR Relay Module evaluates each data path independently, produces three Alarm Contact Signals, and passes these Alarm Contact Signals to the TMR Relay I/O Module.  If the OK Status for a data path is NOT OK, the Alarm Contact Signal associated with that data path is set as invalid.

TMR Relay I/O Module: The TMR Relay I/O Module contains 12 relays arranged in 4-channel groups of 3 relays each.  This arrangement provides 2-out-of-3 relay voting for each of the 4 relay channels.  For each relay channel, the TMR Relay Module provides 3 Alarm Contact Signals.  Each Alarm Contact Signal is input to one of the relays in the channel group. The design of these relay channel groups provide the 2 out-of-3 voting as listed in the Table.  Additionally, each TMR Relay Module provides an OK status which is evaluated on the TMR Relay I/O Module.  If the module is NOT OK, the TMR Relay IO Module does not evaluate the Alarm Contact Signals from that module.

3500/15 127610-01大卡

3500/94 145988-01大卡

3500/93 135799-01大卡

3500/15 127610-01大卡

128275-01

330703-000-070-10-02-05

330100-90-00

3500/20 125744-02

3500/05

330108-91-05

3500/15 127610-01

22810-01-05-50-02