IMAC2B009 V2
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Ampcontrol Pty Ltd
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iMAC System User Manual
iMAC2B009 V4
– 10/18
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Emergency Stop SIL Qualification
The primary safety function of the iMAC2 Controller is that its Control Relay (CR) will de-energise on loss of
communications with the iMAC EOL module. This allows an emergency stop system to be implemented
simply by installing emergency stop switch contacts in series with the signal line that connects iMAC2
Controller to EOL module. When an emergency stop switch contact operates, the signal line connection
between iMAC2 Controller and EOL module is open circuited causing a loss in communication between
Controller and EOL which the Controller detects and forces its Control Relay (CR) to open (de-energise).
Figure 4.5: An Implementation of Emergency Stops on a 2-Wire iMAC Fieldbus
Refer to IMACB182 iMAC Emergency Stop SIL Qualification document for detailed safety information.
IECEx Certifications
The iMAC System has been Ex ia Group I certified for use in hazardous areas such as underground coal
mines. Certification details are as follows:
Certification
Date Issued
Approved Module Types
IECEx ITA 07.0017X Issue 1
Certificate of Conformity
23/03/2018
MLB, GM1, GM1-D, GM2, SA16, AIM, SIM
IECEx ITA 07.0017X Issue 1
System Approval Overview
Diagram
(IMAC-Z-032)
The system approval overview drawing details how the system
can be configured, how modules can be connected, the numbers
of modules that can be connected, cable parameters and relevant
entity parameters. Note the iMAC system is certified as a system,
entity parameters are only used for connecting certain iMAC
modules to other intrinsically safe systems. For example, iMAC
AIM and SIM modules have entity parameters for connecting their
4-20mA, RS485 and Power Supply connections to other entity
approved intrinsically safe devices.
