BENTLY 3500/22M 138607-01 Output Redundant Monitor

TDI provides certain functions common to the entire rack, however the TDI is not

part of the critical monitoring path and has no effect on the proper, normal operation

of the overall monitor system. One TDI or RIM is required per rack. The TDI

occupies only a single slot in the rack and is always located in Slot 1 (next to the

power supplies).

For Triple Modular Redundant (TMR) applications, the 3500 System requires a

TMR version of the TDI. In addition to all the standard TDI functions, the TMR TDI

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 TDI continually compares the outputs from three (3)

redundant monitors. If the TMR 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. 

Front Panel LEDs

OK LED:

Indicates when the 3500/22M is

operating properly

TX/RX LED:

Indicates when the 3500/22M is

communicating with the other

modules in the rack.

TM LED:

Indicates when the 3500 rack is in

Trip Multiply mode.

CONFIG OK LED:

Indicates that the 3500 rack has a

valid configuration.

I/O Module OK

Relay:

Relay to indicate when the 3500 rack

is operating normally or when a fault

has been detected within the rack.

User can select either an “OPEN” or

“CLOSED” contact to annunciate a

NOT OK condition. This relay always

operates as “Normally Energized”.

OK Relay:

Rated to 5A @ 24 Vdc/120 Vac, 120

Watts/600 VA Switched Power.