RHE26/27 Installation & Startup Guide – Doc. No. 8.2.1.06 – Ver. 1.40
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3.2.3.4
Analog Input
The RHE27 can be equipped with a 4-20 mA analog input for connecting an external transmitter
(such as a pressure sensor) with a passive 4-20 mA output. The RHE27 transmitter provides
power to the connected devices’ output.
The 4 – 20mA analog input is connected to terminal 60 (positive) and terminal 61 (negative). It is
highly recommended that shielded cable be used and that the shield is connected to terminal 68
(PE) at the transmitter.
The analog input in RHE27 transmitters certified for use with an RHM in a hazardous area includes
certified barrier circuitry for connection with an intrinsically safe device.
The negative (AIG) terminal of the input is internally connected to PE, so it is important to connect
only devices that are floating.
Figure 13: Analog Input
