3500/22M 288055-01 Bently DCS system power redundancy module

Description

3500/22M 288055-01 The 3500/32 Relay Module provides four

double-pole, double throw (DPDT) relays that

can actuate based on alarm conditions within

3500 monitor modules. 3500/22M 288055-01 The configuration

software allows the user to program various

combinations of alarms, ranging from an

individual channel’s ALERT or DANGER status,

to highly complex Boolean expressions that

combine two or more channel statuses to

provide special AND or OR voting. By adding

the desired number of relay modules, the user

3500/22M 288055-01 can provide individual contacts for each

channel, alarm type, and group of channels

for global alarm annunciation.

The 3500/34 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.

3500/22M 288055-01 Relays are epoxy-sealed and installed arc

suppressors are standard. Users can program

relays for either normally energized or

normally de-energized operation.

The 3500 Rack also supplies a common

system OK relay2 in addition to any alarm relays in the

rack. This relay is located in the TDI/RIM’s I/O module

and is connected to the OK circuits of all modules in

the rack. These circuits monitor the operating

condition of each module. 3500/22M 288055-01 Any fault in the module, its

transducers, or associated transducer field wiring will

be annunciated by the OK relay. This relay is a single

pole, double-throw (SPDT) type and is normally

energized, providing added capability of annunciation

in the event of primary power loss.

3500/22M 288055-01 Notes:

1. Although not a required component of the 3500 System, we

strongly recommend relays as the appropriate way to interconnect

the 3500 System in auto-shutdown applications. Analog (e.g. 4 to 20

mA) and digital (e.g. Modbus*) connections are intended for operator

annunciation and trending purposes and do not provide the fault

tolerance or integrity necessary for highly reliable machinery

shutdown purposes.

2. Dozens of possible event conditions within the rack can drive the

NOT OK relay. For this reason, it is not intended for use as part of a

machinery auto-shutdown circuit and should be used for general

annunciation purposes only.

Keyphasor Inputs

The 3500 System can accommodate up to four1

Keyphasor transducers per rack by installing two

3500/25 Keyphasor modules in a rack2. Each 3500/25

is a half-height module that provides power and

termination for up to two Keyphasor transducers

each. When applications require Keyphasor

transducers, simply install a single 3500/25 module.

Keyphasor signals from the 3500/25 module(s) can be

routed to appropriate monitor modules via the 3500’s

rack backplane for use in speed, phase, tracking filter,

and other measurements.

Notes:

1. When more than four Keyphasor transducers must be used in a single rack,

contact the factory for details regarding special modifications available.

2. When two 3500/25 modules are used, they must be installed in the same

rack slot, one above the other.

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For the simple purchase procedure of spare parts, ensure that they are delivered to the site in a timely manner, and help users reduce the risk of downtime caused by the shortage of spare parts
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