IS1 resp. IS1+ Remote I/O System
For CL I, DIV 1 / Zone 1
Overview
2016
03.03. Bagusch
Kaiser
9400 6 031 003 1
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Example for Fieldbus System Topology with Bus Isolators
interfacing Automation control systems with DIV 1 / Zone 1
installation of IS1 resp. IS1+ Remote I/O System:
Example for Ethernet System Topology with Isolators
interfacing Automation control systems with DIV 1 / Zone 1
installation of IS1 resp. IS1+ Remote I/O System:
Service Bus with Isolating Repeater interface:
Mounting direction:
BusRail
BusRail
BusRail
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, sensors and a nonhazardous location automation
system. It consists of electrical apparatus in Class I, Division 1 or
Class I, Zone 1 hazardous locations linked by an intrinsically safe field
bus installed per the National Electrical Code, ANSI/NFPA 70 Article
500 or Canadian Electrical Code, CSA C22.
The intrinsically safe field bus circuit is achieved with the use of the
Fieldbus Isolating Repeater type 9185 (copper to copper interface) or
9186 (fiber optic to copper interface). The Ethernet interface is
achieved with the use of media converters and switches providing
optical inherently safe Ethernet.
These devices reside in the nonhazardous location or in Division 2 or
Zone 2 and provide a connection to the IS1 resp. IS1+ Remote I/O
System. See examples to the left.
The apparatus located in the Division 1 or Zone 1 hazardous location
are referred to as Remote I/O and consist of the following major
subsystems.
1. CPU & Power Module, Type 9440
The CPU and Power Module contains a power supply unit for its
own power supply, 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
undervoltage 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, the redundant fieldbus and on the Service Bus.
The communication with the I/O Modules is implemented via the
address and data lines on the BusRail. The interface of the CPU &
Power Module with the internal data bus on the BusRail is
designed with redundancy.
2. CPU Module Type 9441 and Power Module Type 9444
The IS1 System for Ethernet uses a separate Power Module and
CPU Module plugged onto an associated Socket instead of the
CPU & Power Module Type 9440. Except for the external
communication, which is achieved via optical fibre interface, the
Power Module and the CPU Module provide similar functions as
the CPU & Power Module type 9440.
Components of Remote I/O System
All I/O Modules are manufactured in a unique DIN rail mount
package, which then mount onto the Remote I/O system BusRail.
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 1
or Class I, Zone 1 hazardous (classified) locations.
4. Use an FM Approved or NRTL listed Dust-Ignition proof enclosure
appropriate for environment protection in Class II and III, Division
1, 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.
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.
7. Installation in Division 2 or Zone 2 is also allowed according to
NEC Article 504/505 or Canadian Electrical Code, CSA C22.
Therefore see drawing No. 9400 6 031 004 1.
WARNING: Substitution of components may impair Intrinsic Safety.
AVERTISSEMENT: Substitution de composants peut compromettre la
sécurité intrinsèque.
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