Setting The Mode Switch And Switching Time Delay - Emerson Rosemount 2120 Reference Manual

Installation
December 2016
2.4

Setting the mode switch and switching time delay

1. Select "Dry on" or "Wet on" mode.
2. Select 0.3, 1, 3, 10, or 30 seconds for the delay before switching output state.
Note
There is a five second delay when changing mode or time delay. The small cut-out in the rotating switch
indicates time delay and mode.
Recommended installation for high level is "Dry on"
(Figure
Figure 2-17. Top-down View: Example Cassette Inside Housing
A. LED
B. Mode Switch/Time Delay
Figure 2-18. "Dry On" Mode, One Second Time Delay (Typical for High Level Applications)
A. Mode "Dry On"
Figure 2-19. "Wet On" Mode, One Second Time Delay (Typical for Low Level Applications)
A
A. Mode "Wet On"
18
2-19). Do not install in the normally 'off' state.
B
A
OPERATION MODE
Dry On Mode
Dry On Wet On
Dry
OUT -
+
Wet
0.3 0.3
1
1
3 3
Dry 10
10
Wet 30 30
Wet On Mode Seconds Delay
1 2 3 4
Dry On Wet On
0.3
1
3
10
30
Seconds Delay
A
Dry On Wet On
0.3 0.3
1
1
3
3
10
10
30
30
Seconds Delay
(Figure
PLC/PNP
Isolate Supply
Before Removing
0.3
1
3
10
30
Reference Manual
00809-0100-4030, Rev FA
2-18) and for low level it is "Wet on"
Installation