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IS1 resp. IS1+ Remote I/O System
for CL I, DIV 2 / Zone 2
Overview
DCS
PLC
RS 485
nonicendive fieldbus
Nonhazardous
Location
Division 2
Zone 2
Division 1
Zone 1
Control Room
Division 1
Zone 0
Fieldbus Isolating
Repeater type
9185/12 Repeater /
Interface conector
Example: System Topology interfacing
Automation control systems with DIV 2 / Zone 2
Installation of IS1 resp. IS1+ Remote I/O System
Service Bus with Isolating Repeater interface
Mounting direction upwards:
The IS1 resp. IS1+ Remote I/O is a DIN rail mounted system designed
to record and output process control signals between hazardous
location transducers and sensors and a nonhazardous location
automation system. It consists of electrical apparatus in the
nonhazardous, Class I, Division 2 or Class I, Zone 2 hazardous
locations linked by either nonincendive field bus or a field bus installed
per the National Electrical Code, ANSI/NFPA 70 Article 500.
The nonincendive field bus circuit is achieved with the use of the
Fieldbus Isolating repeater type 9185. This device resides in the
nonhazardous location and provides a nonincendive field bus circuit
for connection to the IS1 resp. IS1+ Remote I/O System. See example
to the left.
The apparatus located in the Division 2 or Zone 2 hazardous location
are referred to as Remote I/O, and consist of the following major
subsystems.
1.
CPU & Power Module or CPU Module, Power Module & Socket
The CPU & Power Module or the Power Module serves as a
power supply unit for its CPU unit or the CPU Module, as well as
for the supply to the I/O Modules and the field circuits. The power
supply to the I/O modules is implemented via the BusRail. For the
configuration with a redundant CPU and Power Module the power
supply to the I/O modules is decoupled with diodes. The power
supply unit has an under voltage monitoring circuit. The CPU
fulfils the function of a gateway between the internal bus of an IS1
field station and the fieldbus which connects the field station with
the automation system. The gateway is constructed as a dual
processor system. The I/O processor controls the data exchange
with the I/O modules and, when plugged-in, with the redundant
CPU & Power Module. The communication processor controls the
data exchange on the fieldbus and on the Service Bus.
2.
BusRail
The BusRail provides a Power bus, an internal data bus and the
address lines for the interconnection of the CPU & Power Supply
to Remote I/O modules The Power bus distributes power supplied
by the CPU & Power Module to the I/O Modules plugged to the
BusRail. The communication with the I/O Modules is implemented
via the address and date bus lines. The interface of the CPU &
Power Module with the internal data bus on the BusRail is
designed with redundancy.
3.
Components of Remote I/O System
All I/O Modules are manufactured in a unique DIN rail mount
package which then mounts onto the Remote I/O system BusRail.
All I/O Modules provide galvanic isolation between the field
circuits and the BusRail’s circuits.
4.
Refer to pages 3 through 26 for information specific to each
module.
GENERAL NOTES:
1.
Installation should be in accordance with Article 504/505 of the
National Electrical Code, ANSI/NFPA 70 and ANSI/ISA
RP12.06.01 resp. with the Canadian Electrical Code, Part I.
2.
Use a general purpose enclosure meeting the requirements of
ANSI/ISA S82 for use in nonhazardous or Class I, Division 2
hazardous (Classified) Locations.
3.
Use an FMRC Approved or NRTL listed Dust-ignition proof
enclosure appropriate for environment protection in Class II,
Division 1, Groups E, F and G; and Class III, hazardous
(Classified) Locations.
4.
All I/O Modules may be detached from the BusRail or plugged
onto it during operation in hazardous areas.
5.
The Modules may be operated in one of the three mounting
positions only.
I.S. 1 Wizard
Fieldbus Isolating
Repeater Type
9185/12
Nonincendive fieldbus
RS 232
1
2
18
. . .
Nonhazardous
Location
Division 2
Zone 2
RS 232 to RS 485
conversion
This is the PC software configuration
package used for commissioning, trouble-
shooting and MODBUS / HART configuration
BusRail
BusRail
BusRail
Содержание IS1 9466/15
Страница 15: ......
