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Markings, Certificates and Approvals
GB
Model 9010/9020 SIL
10.2 Special Conditions for Safe Use According to EU-Type Examination Certificate
• The control unit shall be operated with activated ATEX mode to meet the requirements of the
standards EN 60079-29-1, EN 50104 and EN 50271
• The operation of the fail relays, as well all other relays, must be annually checked as part of
the preventive maintenance (see chapter 7).
• A test of the display and LEDs on the front panel is available on request and must be performed
at least once per year.
• Based on the connected detectors and local regulations the 9010/9020 SIL Control unit has to
be calibrated and tested in regular intervals.
• The operation manuals of the connected detectors has to be carefully read and understand
before use.
• In the case of measurement combustible gases the alarm threshold for the main alarm must
be in the latching mode.
In ATEX Mode:
If two or more alarm set points are used for the same direction (activation at increasing or
decreasing concentration, respectively) the last alarm shall be of a latching type.
• For the safety related use of each relay, the alarm and failure relays of the
9010/9020 SIL Control unit has to be used in the following condition:
• When operating with 4...20 mA interface remote measuring heads, the specification of the
4...20 mA interface as well as the behaviours below 4 mA and above 20 mA have to be taken
into account (See Appendix 12.5).
• Before start-up it must be made sure that, in view of the considerably longer setting periods,
the possible rising speed of the measure gas concentration in the field use cannot lead to
safety-endangering situations.
• A failure status indicates a malfunction of the control unit or the connected detector or trans-
mitter and therefore a service is required immediately. The connection of the switching outputs
of the failure relays has to enable an immediate triggering message.
(1) Relay under power
(2) Alarm or failure contact is closed
Thereby it will be assured that the relay contacts will give a failsafe signal at power fail or line
disconnection.
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