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20.3
AMD limit switch
When the equipment includes an AMD limit switch, it is certified as intrinsic safety with the
following parameters:
20.4
TH6 transmitters
Transmitters TH6 are certified to be installed in potentially explosive atmospheres. They are
intrinsic safety devices.
The electrical connection and the information with respect to the HART protocol is the same
as in the TH6 transmitter (see sections 11 to 16).
The technical characteristics that differ from TH6 transmitters are the following:
Maximum voltage:
Maximum load in the 4-20 loop:
Ambient temperature:
The rest of characteristics are the same as TH6 transmitter (see section18.3).
The specific intrinsic safety parameters are the following:
Specific parameters
Specific parameters
Ui : 16 V
Ii : 25 mA
Pi : 64 mW
Ci : 30 nF
Li : 100 uH
30 VDC
900 Ω
(at 30 VDC supply voltage)
-20ºC ... +40ºC
Ui : 30 V
Pi : 1,3 W
Ci : 56 nF
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