ROTRONIC XB OEM - Manual (Page 14)

E-M-XB-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
XB Humidity Temperature Transmitter
User Guide
Document title
Page 14 of 27
© 2008; Rotronic AG E-M-XB-V1_10
 direct current from 60 V to 400 V
(unshielded)
 alternate current from 25V to 400 V
(unshielded)
in separated bundles or channels /
conduits, without minimum distance
 direct and alternate current > 400 V
(unshielded)
 Telephone lines
 lines leading into EX-rated areas
in separated bundles or channels /
conduits, without minimum distance
Lightning protection
Cabling in areas with a risk of lightning requires a lightning protection. For cabling underground in between
buildings, we recommend the use of special fiber optic cables. If this is not possible, use copper cables that
are suitable for underground installation.
6.2 Wiring and terminal block diagrams
6.2.1
XB2: 2-wire, loop powered transmitter
Electrical diagram
The maximum permissible cable length connecting
the XB2 to other devices is determined by the total
resistance resulting from the addition of the cable
resistance and that of the devices connected in series
with the unit. This resistance should not exceed 500
ohms.