Interfaces; Analog Outputs; Modbus Interface; Status Signals (Namur) - Emerson Rosemount Xstream Series Instruction Manual

Instruction Manual
HASAxE-IM-HS
05/2006
1-7

Interfaces

All models are configured to provide the follo-
wing interfaces:
•

analog outputs

• Modbus interface (RS 485 / RS 232)
• status signals (NAMUR; relay outputs)
1-7-1 Analog Outputs
The results of each measuring channel are
output via a current output.
By means of a software setup menu the out-
puts can be configured to support a variety of
operating modes (e.g. 0-20 mA, 4-20 mA) as
1-7-2

Modbus Interface

The analyzers are equipped with a serial
interface supporting Modbus RTU protocol to
provide communication with external hosts
(e.g. data acquistition systems). The interface
supports parameter data transmission, chan-
ging of parameters and initializing functions
(procedures).
The RS 485 interface is optically isolated from
the analyzer electronics and allows to build up
a network of several analyzers.
1-7-3

Status Signals (NAMUR)

Three relay status outputs are available to
digitally monitor the analyzer status according
the NAMUR NE107 specification: "Failure",
"Maintenance required / Off specification" and
"Function check".
The status relays provide dry contacts with a
maximum load of 30 V / 1 A / 30 W each!
Emerson Process Management GmbH & Co. OHG
1-7 Standard Interfaces
Digital inputs/outputs are optionally available.
The interface signals are provided at a submin-
d-connectors or screw terminals, depending on
analyzer model.
well as the NAMUR NE 43 specifications
(
Factory default settings for analog outputs are
4-20 mA.
Optionally available is a RS232 interface with
or without optical isolation against analyzer
electronics.
Read the instructions in the technical data
section of your analyzer variation carefully
to obtain failure-free data communication
(
Refer to chapter 9 for information about
available Modbus commands.
The operation mode (NO "normally open" /
NC "normally closed") is NOT user configurable
and by default is factory set to NO. Other
settings need to be defined at time of placing
the analyzer order.
Refer to the technical data section of your
analyzer variation for a more detailled infor-
mation about relay status signals (
page 2-5 et
5-4-3-4-1, page 5-34).
2-2, page 2-5 et sqq.)!
sqq.)!
X-STREAM
2-2,
1-17