IS1+ Remote I/O System
for CL I, DIV 2 / Zone 2
Overview
9400 6 031 006 1
2018
08.03. Bagusch
Kaiser
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Examples for System Topology interfacing
Automation control systems with DIV 2 / Zone 2
installation of IS1+ Remote I/O System:
Mounting direction:
Construction example for assembly of an IS1 resp. IS1+ System:
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. For Plugging to the
CPU Module and Power Module on the socket, see the
corresponding control drawing.
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
above.
The IS1+ Remote I/O System 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.
Direct connected by RS485 or ethernet for PLC/DCS communication.
An ethernet switch ist optional in this topology.
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. Socket
The Socket is the Backbone of the Remote I/O System IS1+. It
provides connections for Power Modules and CPU Modules via
the Backplane. I/O Modules are connected via a BusRail interface,
which is also provided by the Socket.
2. Power Module
The Power Module serves as a power supply unit for 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 Socket and BusRail. For the configuration with redundant
Power Modules the power supply to the I/O Modules is decoupled.
The Power Module has an under voltage monitoring circuit.
3. CPU Module
The CPU Module fulfils the function of a gateway between the
BusRail and Backplane and the communication interfaces which
connects the Remote I/O System with the PLC/DCS or
Engineering Station. 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 Module or Power Module. The communication processor
controls the data exchange on the communication interfaces.
4. Backplane
The Backplane provides, an internal data bus and the address
lines for the interconnection of the CPU Modules and Power
Modules and I/O Modules plugged onto the socket. It also provides
a Power bus supplied by the Power Module to CPU Modules and
I/O Modules plugged to the socket. The communication with the
I/O Modules is implemented via the address and data bus lines.
The interface of the CPU Module with the internal data bus on the
BusRail is designed with redundancy.
5. BusRail
The BusRail provides, an internal data bus and the address lines
for the interconnection of the CPU Module to I/O Modules. It also
provides a Power bus supplied by the Power Module on the socket
to the I/O Modules plugged to the BusRail. The communication
with the I/O Modules is implemented via the address and data bus
lines to the CPU Module on the socket. The interface of the CPU
Module with the internal data bus on the BusRail is designed with
redundancy.
6. I/O Modules
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.
WARNING: Substitution of components may impair Intrinsic Safety.
AVERTISSEMENT: Substitution de composants peut compromettre la
sécurité intrinsèque.
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