Before starting the installation, check the
- Make sure that your installation site
suits the Ex classification of the transmitter (for classification information relevant to
your region, see Regional safety certification overview).
- Review the hazardous area information
relevant to your region (see Regional safety certification overview) for further information on Ex safety requirements related to HMT370EX
and specific conditions of use.
- When selecting the cable glands and plugs
for your application, review the information in Cable gland and conduit options.
- Review the wiring diagrams included in
this document for information on wiring using either a galvanic isolator or a Zener
|WARNING Protected installation using galvanic isolators or Zener barriers is
mandatory in a hazardous environment.|
|CAUTION When planning the wiring
of your application, note that Channel 1 (CH1) must always be wired. The transmitter
receives power through the Channel 1 screw terminals, and does not power on if only Channel
2 (CH2) is wired.|
|CAUTION To maintain the required
Ex protection, do not install the transmitter model with an LCD display in a location where
it is exposed to direct sunlight.|