Emerson S-series Serial Interface Introduction

The DeltaV™ S-series Serial Interface provides a connection between the DeltaV system and other devices.

• Provides seamless information interface

• Plug-and-play ease of use

• Extends the life of existing equipment

• 1:1 redundancy for Serial Interface I/O cards

• Automatic switchover

Introduction

The S-series Serial Interface provides a connection

between the DeltaV™ system and devices that support a

serial protocol, such as Modbus or Allen Bradley’s Data

Highway Plus.

The S-series Serial Interface is supplied with Modbus

software drivers pre-loaded. Additional drivers are available

to allow a wide variety of devices to be integrated directly

into the DeltaV controller’s I/O subsystem. Data can be used

by control modules or communicated to workstations as

SCADA tags for display and/or historizing. Like all DeltaV I/O,

the Serial Interface may be added online while the rest of

the controller I/O is powered up and in use.

DeltaV Serial Interface can also be installed as a redundant

pair for critical applications needing the highest availability.

Benefits

Provides seamless information interface. Using

the Serial Interface with the DeltaV system, you gain an

extended view of your entire plant. All serial information

from 3rd party systems, analyzers, PLC’s, is readily available

for display at the Operator Interface.

When connected to a PLC, DeltaV software may pass

supervisory information to the PLC facilitating the

coordination of control strategies across systems.

Plug-and-play easy to use. Plug-and-play installation

saves money. The Serial Interface works just like other

DeltaV I/O interfaces. It fits into any available slot on the

controller I/O carrier. There are no dipswitches. Just plug it in!

The DeltaV controller auto-senses the Serial Interface and

presents the configuration options. Online help makes this

interface a snap to configure. After a simple point-and-click

configuration exercise, your integrated solution is up and running.

Extends the life of existing equipment. Enhance existing

capabilities—don’t replace them. Many plants have a variety

of devices already installed. With the Serial Interface you are

able to effectively interface a DeltaV system with existing

PLCs or other serial devices. This means that you can layer

the state-of- the-art process control offered by a DeltaV

system on to the devices you already have in place.

1:1 Redundancy for Serial I/O cards. You can add

Serial interfaces as simplex cards or redundant pairs.

The interfaces automatically detect the presence of

the redundant terminal block and are autosensed by

the system as a redundant pair. There is no additional

configuration. Use redundant Serial interfaces with slave

devices that support redundant serial ports.

Automatic switchover. Should a primary Serial

Interface 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. The standby card continually polls the

slave devices for diagnostic to confirm its ability to take

over communications.