Emerson Rosemount 2120 Quick Start Manual page 19

March 2022
3.5.4 Relay DPCO cassette (12 Vdc nominal version)
Figure 3-4: Relay DPCO Cassette, 12 Vdc Nominal Version (Green Label)
– Code E
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 Rosemount 2120. Keep the DPST switch free of obstructions. Label the
DPST switch to indicate it is the supply disconnection device for the
Rosemount 2120.
Table 3-8: Electrical Parameters
Parameter
U
I
Table 3-9: NC, C, and NO Terminals
Parameter
cos ϕ
L/R
I
MAX
U
MAX
P
MAX
Quick Start Guide
Fuse 0.5 (T)
DPST
0V +V
Value
9 - 30 Vdc
< 4 mA
Resistive load
1
0 ms
2 A
30 V
60 W
NC C NO NC
Inductive load
0.4
7 ms
1 A
30 V
30 W
Quick Start Guide
C NO
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