Rosemount 2120 - Step 2: Electrical Installation Options

August 2012
8
Quick Start Guide
Step 2: Electrical installation
Before use, check that suitable cable glands and blanking plugs are fitted and
fully tightened.
Isolate supply before connecting the switch or removing the electronics.
The functional earth terminal must be connected to an external
earthing system.
Direct load switching electronics cassette (two-wire, red label)
High level Dry = ON Low level Wet = ON
LED on continuously
LED flashes each
second
LED on continuously
LED flashes each
second
Direct Load
Switching
WARNING
Isolate Supply
Before Removing
OPERATION MODE
Dry On Mode
Dry
Wet
Wet On Mode
Dry
Wet
Dry On Wet On
Seconds Delay
0.3 0.3
3
30
10
1
3
30
10
1
123
LINE
LOAD
PE
(Ground)
Neutral
Live
0V
Fuse 2A(T)
R
I
L
R = External load (must be fitted )
U = 20 - 264V ~ (ac) (50/60Hz)
I
OFF
< 4 mA
I
L
= 20 - 500 mA
U = 20 - 60 V (dc
)
)
I
OFF
< 4 mA
I
L
= 20 - 500 mA
DPST
+V
= 5 A, 40 ms (inrush)
I PK
= 5 A, 40 ms (inrush)
I PK
= Load On
= Load Off
Note: The values
shown are nominal;
see the 2120
Reference Manual
00809-0100-4030
for complete data
Dry On Wet On
Seconds Delay
0.3 0.3
3
30
10
1
3
30
10
1
Dry On Wet On
Seconds Delay
0.3 0.3
30
10
3
30
10
1
3
1
U
N L
0V
+V
Fuse
2A(T)
I
L
12V
DPST
Fuse
2A(T)
N L
0V
+V
I
L
<4mA
DPST
U
N L
0V
+V
Fuse
2A(T)
I
L
12V
DPST
Fuse
2A(T)
N L
0V
+V
I
L
<4mA
DPST