Endress+Hauser iTEMP TMT82 - Shielding and Grounding

Wiring iTEMP TMT82
20 Endress+Hauser
Please also observe the general procedure on →  17.
*
*
1 2 3
4
2-
1+
2-
1+
*
2- 1+
5
6
7
4
5
7
A0017841
 11 Connecting the signal cables and power supply
1 Head transmitter installed in field housing
2 Head transmitter installed in terminal head
3 DIN rail transmitter mounted on DIN rail
4
Terminals for HART
®
protocol and power supply
5 Internal ground connection
6 External ground connection
7
Shielded signal cable (recommended for HART
®
protocol)
• The terminals for connecting the signal cable (1+ and 2-) are protected against
reverse polarity.
• Conductor cross-section:
– Max. 2.5 mm
2
for screw terminals
– max. 1.5 mm
2
for spring terminals. Min. stripping length of cable
10 mm (0.39 in).
5.4 Shielding and grounding
The specifications of the HART FieldComm Group must be observed during installation.
-
.
1
2
3
4
A0014463
 12
Shielding and grounding the signal cable at one end with HART
®
communication
1 Optional grounding of the field device, isolated from cable shielding
2 Grounding of the cable shield at one end
3 Supply unit
4
Grounding point for HART
®
communication cable shield