Wiring Overview - Endress+Hauser iTEMP HART DIN rail TMT 122 Bedienungsanleitung

5 Wiring over-
view
Terminal layout
®
Connection HART
communication
!
12
Hand operating module DXR 275/375 or Commubox FXA 191 in
combination with PC and E+H operating software (See "Operation" on
page 14.).
Hint!
The measurement circuit must have a load of at least 250 Ω. If using the E+H
power supplies RNS 221 and RN 221N this resistance is already installed in
the unit and is therefore not required externally!