Digital I/O Module Triconex 2755-6

External Termination Panels

An external termination panel (ETP) is an electrically-passive printed circuit board (PCB) to

which field wiring is easily attached. A panel connector, terminal blocks, and optional

components are mounted to the PCB and enclosed in a DIN-rail compatible plastic housing. A

termination panel and associated cable pass input signals from the field directly to an input

module, or pass output signals from an output module directly to field wiring. This

arrangement permits the removal or replacement of I/O modules without disturbing field

wiring.

Standard termination panels are best for remote marshaling of field wiring where maximum

flexibility, high density and simple maintenance is desired. Standard termination panels allow

you to marshal field signals in a separate enclosure up to 99 feet (30 meters) from a Tricon.

A standard termination panel consists of a PCB with all necessary components—such as two

piece terminal blocks, resistors, fuses and blown-fuse indicators—mounted on a DIN-rail

compatible plastic housing. The housing snaps into mounting rails in accordance with

DIN 50 22.

Compression terminals on the standard panel are designed for use with 24- to 12-gauge (0.3

mm2 to 2.1 mm2) wiring. Some panels have an optional current-limiting series resistor, others

have a fuse with a blown-fuse indicator, to protect the field wiring and field device.

Standard termination panels are pre-configured for a specific application. For instance,

commoned standard termination panels can be ordered with commoned power-and-return, or

redundant DC power configurations with a diode-ORing. The thermocouple input termination

panel provides cold-junction temperature sensors and can be ordered with upscale, downscale,

or programmable burnout detection. A standard termination panel for analog voltage inputs

provides commoned or non-commoned signal returns, while the current-mode version has a

precision resistor at each input point to convert current to voltage.

Each standard termination panel is packaged with a matched interface cable that connects the

panel to the backplane of a Tricon chassis. A female connector at one end of the cable is keyed

to match the male connector on the Tricon backplane. A male connector on the other end of the

cable attaches to the standard termination panel.

In addition to standard termination panels, there are other types of termination panels,

including:

• Basic termination panels

• Hazardous location (nonincendive) termination panels

• RG 1.180 Termination Panels

• Termination panels with interposing relays

• Bypass panels for digital inputs

• Termination panels with RTD/TC/AI input signal conditioning

• Termination panels for 3603B digital output modules

• Termination panels for 3806E analog output modules

TMR Digital Input Modules

Each TMR Digital Input (DI) Module has three independent input channels

that independently process all data entered into the module.

A microprocessor on each channel scans each input point, compiles the data,

and transmits it to the main processor as required.

The input data is then voted on the main processor before being processed

to ensure the highest integrity.

All critical signal paths are 100% triple processed to ensure safety and maximum

availability. Guaranteed safety and maximum availability.

Each channel regulates signals independently and provides optical isolation

between the field and the Tricon.

All TMR digital input modules provide complete and continuous diagnostics

for each channel.

Any diagnostic failure on any channel activates the Module Failure Indicator,

which in turn activates the chassis alarm signal.

The Module Failure Indicator points to a channel failure, not a module failure.

Modules are guaranteed to operate normally in the event of a single failure and

to continue to operate normally in the event of multiple failures of certain types.

Our strengths are the Tricon Racks, Tricon Power Modules, Main Processor Modules,

Input Modules, Output Modules, and the Tricon Communication Module TCM.

The Triconex CM3201S2 Communication Module is a highly reliable and efficient

component of the Triconex safety and control systems, specifically designed

for industrial automation and critical processes.