Owner's manual

4 ELECTRICAL CONNECTIONS
22
TT 51 SERIES
www.krohne.com 09/2010 - 4000754201 - MA TT 51 R01 en
4.6 Connection diagram of rail-mount transmitter (non-incendive)
DANGER!
This transmitter is a category 3 equipment and may not be operated in areas with potentially
explosive atmospheres other than zone 2 or it may be installed in safe area and connected to a
sensor located in an area with a potentially explosive atmosphere zone 2!
Figure 4-3: Connection diagram
1 Input
2 Modem
3 R
Load
, R ≥ 250 Ω
4 Voltage supply 10…36 VDC
5 Test connection (R
i
≤ 10 Ω)
mA
INFORMATION!
The HART
®
modem is connected parallel to the output load or parallel to the output of the
transmitter.