Emerson Rosemount 2120 Quick Start Manual page 13

March 2022
3.5.1 Direct load switching cassette
Figure 3-1: Direct Load Switching (2-wire) Cassette (Red Label) – Code T
1
R = External load (must be fitted)
N = Neutral
L = Live
Note
A DPST (Double Pole, Single Throw) on/off switch must be fitted for safe
disconnection of the power supply. Fit the DPST switch as near as possible to
the level switch. Keep the DPST switch free of obstructions. Label the DPST
switch to indicate it is the supply disconnection device for the level switch.
Table 3-1: Electrical Parameters
Parameter
U
I
OFF
I
L
I
PK
Quick Start Guide
2 3
R Fuse 2A(T)
DPST
I
L
N L
0V +V
Value
20 - 60 Vdc or 20 - 264 Vac (50/60 Hz)
< 4 mA
20 - 500 mA
5 A, 40 ms (inrush)
Quick Start Guide
13