905U-L Wireless I/O Installation Manual
905U-L Wireless I/O
Page 31 of 40
Version 1.9
Analog output
The 905U-L-R module provides a 4 - 20 mA DC analog output for connecting to
instrument indicators to display remote analog measurements. The analog output is a
current source provided from an internally gen24V loop supply.
When connecting to an external device (e.g. electronic indicator, recorder, PLC / DCS
input, etc.) by connecting the output between the
Analog Output
terminal (+) and the
COM
terminal (-).
Note
Zener protection of analog outputs provides protection against short periods of over-
voltage; however longer periods may result in module damage.
You can also individually configure analog outputs to turn off (i.e. 0 mA) if no command
message is received to the output for a certain period.
The following diagrams illustrate different connection methods:
Connection
method
Example
Loop
powered
device
Floating
input device
