VEGA T32.10-11-30 - Handbuch (Seite 21)

GB
2383336 12/2008 GB/D
WIKA Operating Instructions Temperature Transmitter T32.10/11/30 21
10. Maintenance / 11. Connection of FSK modem ...
10. Maintenance
The temperature transmitters described here are absolutely
maintenance-free! The electronics are completely encapsulated and
incorporate no components which could be repaired or replaced.
11. Connection of FSK modem / HART ® Communicator
The measuring circuit has to have a load of at least
20 Ω.
The FSK modem for hazardous areas must always be
located in the safe area!
With EEx nA, Model T32.**.** 9:
Connection inside the hazardous area is not allowed.
Observe section 7 with all other transmitters with hazardous area
protection.
This resistor is already integrated in most line transformers available
in the market and is therefore not required separately. Frequently a
special connection for the FSK modem is already available.
11.1 Typical connection in hazardous areas (Head mounting)




HART ®
Communicator
(HC27)
1)
FSK Modem
Transmitter
Hazardous area
power supply
FSK modem
Safe area
31736
1.06
1) Alternative connection
Field Communicator (FC37)