Temperature DIN rail transmitter
4 Wiring
Hauser
13
Connection of a HART
®
hand operated module DXR 275/375
fig. 6:
Electrical connection of the HART
®
operated module
a = HART
®
module, a* = HART
®
module connected to the communication sockets of a power
supply, b = Loop power supply (e.g. RNS 221 power supply or RN 221N active barrier), c = HART
®
module connected
directly to the transmitter, d = PLC with passive input
Connection of Commubox FXA 191
!
Note!
Set the Commubox DIP switch to ’HART
®
’!
fig. 7:
Electrical connection of the Commubox FXA 191
a = Commubox FXA 191 (in combination with a PC - E+H operating software ’Commuwin II’),
a* = Commubox FXA 191 connected to the communication sockets of a power supply unit,
b = Loop power supply (e.g. RNS 221 power supply or RN 221N active barrier), c = Commubox FXA 191 connected di-
rectly to the transmitter, d = PLC with a passive input
4.3
Potential grounding
!
Note!
Please take note of the following when installing the transmitter. The shield on the 4 to 20 mA signal
output must have the same potential as the shield at the sensor connections.
In plants with strong electromagnetic fields, shielding of all cables with a low ohm connection to
ground is recommended.
It is recommended that shielded cable be used in installations outside buildings, due to the danger
of lightning strikes.
