Category: Emerson

I/O Cards

A variety of analog and discrete I/O interfaces are available to

meet your specific requirements. The following cards support

simplex or redundant installation:

• AI 4-20 mA HART, eight channels

• AO 4-20 mA HART, eight channels

• DI Dry Contact, eight channels

• DO 24V DC High Side, 8channels

• AI (Plus) 4-20 mA HART, 16channels

• AO (Plus) 4-20 mA HART, 16channels

• DI (Plus) 24V DC, Dry Contact, 32channels

• DO (Plus) 24V DC, High-Side, 32channels

Pulse Counters are available on most DI cards. The supported

maximum frequency varies from 0.1 Hz on AC signals to 75 or

120 Hz on 24V DC inputs, and up to 50 KHz on the High-speed Pulse input card.

Plug-and-play I/O: All S-series traditional I/O components

plug into the I/O interface carrier and are auto sensed by

the controller. There are no addressing switches or jumpers.

Cards can be installed in any order simplifying the I/O

subsystem design. New I/O interfaces are detected by the

system and added to the engineering database automatically.

Additional features can be enabled as needed and downloaded

without disruption to existing I/O communication,

allowing you to install the I/O you need today with the ability to expand tomorrow.

1:1 Redundancy for traditional I/O cards: Increased

system availability is easy with S-series traditional I/O cards.

Four traditional I/O card types are available with redundant

terminal blocks for critical field circuits. Simply install a pair

of cards on the prescribed redundant terminal block and the

DeltaV Distributed Control System (DCS) will automatically

recognize them as a redundant pair. There is no configuration

other than to autosense the redundant pair.

1:1 Redundancy for traditional I/O cards: Increased

system availability is easy with S-series traditional I/O cards.

Four traditional I/O card types are available with redundant

terminal blocks for critical field circuits. Simply install a pair

of cards on the prescribed redundant terminal block and the

DeltaV Distributed Control System (DCS) will automatically

recognize them as a redundant pair. There is no configuration

other than to autosense the redundant pair.

Plug-and-play I/O: All S-series traditional I/O components

plug into the I/O interface carrier and are auto sensed by

the controller. There are no addressing switches or jumpers.

Cards can be installed in any order simplifying the I/O

subsystem design. New I/O interfaces are detected by the

system and added to the engineering database automatically.

Additional features can be enabled as needed and downloaded

without disruption to existing I/O communication,

allowing you to install the I/O you need today with the ability to expand tomorrow.

Field-mounted capable hardware: All S-series traditional I/O

interfaces are rated for extreme operating temperature ranges

of -40 to 70°C (-40 to 158°F). The interfaces can be installed

in field mounted enclosures so you significantly reduce the

footprint of your equipment and increase valuable control room

space for other uses. This also allows you to save on wiring

expenses by eliminating the need for long runs of multi-cores.

The integrated design of the I/O subsystem can eliminate the

need for marshaling panels. This saves you even more in your

total capital costs.

1:1 Redundancy for traditional I/O cards: Increased

system availability is easy with S-series traditional I/O cards.

Four traditional I/O card types are available with redundant

terminal blocks for critical field circuits. Simply install a pair

of cards on the prescribed redundant terminal block and the

DeltaV Distributed Control System (DCS) will automatically

recognize them as a redundant pair. There is no configuration

other than to autosense the redundant pair.

Easy online expansion: The S-series I/O carriers and interfaces

can easily be added online, without disruption of existing

I/O communication. I/O carriers can be extended online,

either by directly connecting them to the right side of the

existing carrier, or using extender cables to mount the new

carrier on a different DIN rail. The controller automatically

detects new carriers and interfaces and allows these to be

auto-sensed into the configuration database.

Field-mounted capable hardware: All S-series traditional I/O

interfaces are rated for extreme operating temperature ranges

of -40 to 70°C (-40 to 158°F). The interfaces can be installed

in field mounted enclosures so you significantly reduce the

footprint of your equipment and increase valuable control room

space for other uses. This also allows you to save on wiring

expenses by eliminating the need for long runs of multi-cores.

The integrated design of the I/O subsystem can eliminate the

need for marshaling panels. This saves you even more in your

total capital costs.

Traditional I/O interfaces have I/O function keys that allow

the terminal block to be set to receive a specific I/O card.

These keys ensure that the correct I/O card is always plugged

into the corresponding terminal block. The keys provide a

safety measure by preventing the wrong I/O card being

installed. It’s incredibly easy to use and gives you time to do more.

The I/O carriers provide integrated bussed field power

distribution to the I/O interfaces. The integrated bus is divided

into primary and secondary power for odd- and even-numbered

slots. Each slot is individually fused to protect power to other

cards. This significantly reduces the external power distribution

circuits while still providing each card with fused 24V DC bussed

field power.

Reduced installation time and expense: The DeltaV system’s

S-series I/O interfaces are designed for quick assembly and

error proof maintenance. All carriers snap onto T-DIN rails and

interfaces snap into the I/O slots without the use of any tools.

Each I/O interface has a separate wiring terminal block,

which connects field wiring to the interface. The I/O card can

easily be removed without touching the I/O wiring on the

terminal block. Some I/O cards can also use the fused terminal

block, which is equipped with in-line fuses that can be pulled

to isolate power to the field circuit.

The integrated bus is divided into primary and secondary power

for odd- and even-numbered

slots. Each slot is individually fused to protect power to other

cards. This significantly reduces the external power distribution

circuits while still providing each card with fused 24V DC bussed

field power.

Benefits

Modular and flexible construction: The S-series traditional

I/O subsystem is designed with your investment in mind.

Each controller supports up to eight I/O carriers that form a

robust, passive bus for up to 64 I/O interfaces. Each interface

has a matching I/O terminal block and can be installed in any

I/O slot on the bus. Carriers and interfaces can be added online,

without interruption to the existing I/O communication.

This modular design enables you to purchase the exact

amount of I/O cards, eight-wide carriers, power/controllers,

and two-wide carriers you need and add more DeltaV I/O

as your system grows.

Each slot is individually fused to protect power to other

cards. This significantly reduces the external power distribution

circuits while still providing each card with fused 24V DC bussed

field power.

I/O Card Redundancy

Redundant I/O cards are available for critical applications.

The same card can be used in simplex or redundant applications.

When installed on a two-wide redundant terminal block, the cards are recognized as a redundant pair by the controller.

The controller scans each card and determines which card is acting as the active interface.

When a fault is detected, the system automatically switches to the standby I/O card.

DeltaV Control modules reference simplex and redundant I/O channels identically 

and there is no special configuration required to take advantage of redundancy.

Switchover of a redundant I/O card is completed within two scans of the I/O bus.

Make-before-break contacts ensure digital field instruments remain powered and the process is undisturbed.

Analog output signals are briefly driven by both cards for < 5 ms during switchover of the card.

Hardware Alerts automatically report hardware integrity errors for both the primary and secondary cards.

Any event that causes a switchover is also reported automatically through the system hardware alerts and is logged in the Event Chronicle.

Events that can cause a switchover include.

Hardware failure within the active card.

Communications failure between the active card and the controller.

Detection of a fault in the field wiring.

A switchover may also be initiated from the diagnostics explorer, and the health and status of both cards and 

their channels are available in the diagnostics explorer.

The system automatically commissions a new standby card.

In safe areas, failed cards can be replaced under power.

In hazardous areas, appropriate installation procedures must be followed.

Increases productivity

Real-time, online equipment additions: Online addition of new I/O interfaces means your process does not get interrupted.

As new equipment is added, the DeltaV Explorer

acknowledges it and assigns it basic configuration.

Increases process availability

1:1 Redundancy for Traditional and HART I/O cards:

DeltaV redundant I/O uses the same Series 2 I/O cards as  non- redundant I/O.

This allows you to leverage your investment in installed I/O and in I/O spares.

No additional configuration is needed when using a redundant channel. 

The redundant terminal blocks provide the same field wiring connections  as simplex blocks, so there is no extra wiring needed.

Autosense of redundancy: DeltaV autosenses redundant I/O, which greatly simplifies the task of adding redundancy to the system.

The redundant pair of cards is treated as one card  in the system tools.

Automatic Switchover: Should a primary I/O card fail,

the system automatically switches to the “standby” card without user intervention.

The operator is given clear notification of a switchover at the operator display.