turck 100000703, Руководство по безопасности

Страница: 6 / 16

6
Product Description
Hans Turck GmbH & Co. KG | T +49 208 4952-0 | F +49 208 4952-264 | more@turck.com | www.turck.com
4 Product Description
The analog signal isolators IMXK12-AO are designed to transfer standard galvanic isolated cur-
rent signals from the safe area into the explosion hazardous area in a 1:1 transmission mode.
In addition to the analog signals, digital HART communication signals can be transferred
bidirectional.
Output A1 is assigned to input E1.
Typical applications are the control of I/P converters as well as indicator displays and actuator.
4.1 Safety function
If a current less than 3.6 mA flows into input [E1], a current less than 3.6 mA flows out of the cor-
responding output [A1] within maximum 50 ms.
The transmission of the 4…20 mA current is not part of the safety function.
The LED state is not part of the safety function.
4.2 Safe state
In the safe state a current less than 3.6 mA flows out of output [A1].
5 Safety Planning
This chapter provides information for planning a safety-related loop.
The device is not specified for a certain application. Make sure that the data provided in this
chapter is valid for your target application.
Special application-specific factors may cause the premature wear of the device and must be
taken into consideration when planning systems; take special measures to compensate for a
lack of experience based values, e.g. through implementation of shorter test intervals.
The suitability for specific applications must be assessed by considering the particular overall
safety-related system with regard to the requirements of IEC 61508.
Safety-planning must only be carried out by trained and qualified personnel. If there is any
doubt contact Turck directly.
5.1 Architectural specifications
Due to architectural considerations the following characteristics are specified:
Type A
HFT 0
Experience has shown that the useful lifetime often lies within a range of 8 to 12 years. It can
be significantly less if elements are operated near their specification limits. However, it can
be extended by appropriate measures. For example, heavy temperature fluctuations could
potentially decrease the useful lifetime, as constant temperature below 40 °C could potentially
increase the useful lifetime.