Stahl 9471/35-Serie Betriebsanleitung Seite 53

Example for System Topology interfacing
Automation control systems with DIV 2 / Zone 2
installation of IS1 resp. IS1+ Remote I/O System:
Example for Ethernet System Topology with Isolators
interfacing Automation control systems with DIV 2 / Zone2
installation of IS1 resp. IS1+ Remote I/O System:
Service Bus with Isolating Repeater interface:
I.S. 1 Wizard
This is the PC software configuration
package used for commissioning, trouble-
shooting and MODBUS / HART configuration
RS 232
Fieldbus Isolating
Repeater Type
9185/12
RS 232 to RS 485
conversion
Nonhazardous
Location
Nonincendive fieldbus
1 2
Division 2
Zone 2
Mounting direction:
BusRail
. . .
18
BusRail
2016
03.03. Bagusch
Kaiser
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 or
Canadian Electrical Code, CSA C22.
Installation with the use of an appropriate fieldbus isolator for
nonincendive fieldbus circuits (e.g. R. STAHL type 9185). The
Ethernet interface is achieved with the use of media converters and
switches providing optical Ethernet.
These devices reside in the unclassified (nonhazardous) location or
Division 2 / Zone 2 locations and provide a connection to the IS1 resp.
IS1+ Remote I/O System. See examples 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.
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.
2. Installation in Canada should be in accordance with the Canadian
Electrical Code, CSA C22.1, Part 1
3. Use a general purpose enclosure meeting the requirements of
ANSI/ISA 61010-1 for use in nonhazardous or Class I, Division 2
or Class I, Zone 2 hazardous (classified) locations.
4. Use an FM Approved or NRTL listed Dust tight enclosure
appropriate for environment protection in Class II and III, Division
2, Groups E, F and G, hazardous (classified) locations.
5. All I/O Modules may be detached from the BusRail or plugged
onto it during operation in hazardous areas.
BusRail
6. Mount the device in a vertical direction, with the reading of the
marking from below, left or right, or in a horizontal direction with
the terminals nearest the bottom of the enclosure. Never mount
the IO modules upside down (terminals towards the top of the
enclosure). As shown to the left.
WARNING: Substitution of components may impair Intrinsic Safety.
AVERTISSEMENT: Substitution de composants peut compromettre la
sécurité intrinsèque.
IS1 resp. IS1+ Remote I/O System
for CL I, DIV 2 / Zone 2
Overview
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