Emerson Rosemount 2120 Quick Start Manual page 11

June 2020
3.5 Wiring diagrams
CAUTION
• Before use, check the cable glands and blanking plugs are suitably rated.
• Isolate supply before connecting the switch or removing the electronics.
• The Protective Earth (PE) terminal must be connected to an external
earthing system.
3.5.1 Direct load switching electronics cassette
Figure 3-1: Direct Load Switching (Two-wire, Red Label)
U =
I <
OFF
I =
L
I
=
PK
Quick Start Guide
1 2 3
20 - 264 V ~ (ac) (50/60 Hz)
4 mA
20 - 500 mA
5 A, 40 ms (inrush)
Isolate supply before making connections.
Example of external wiring
1
R
PE
(Ground)
Neutral
0 V
R = External load (must be fitted)
U = 20 - 60 V
I < 4 mA
OFF
I = 20 - 500 mA
L
I
= 5 A, 40 ms (inrush)
PK
Quick Start Guide
2 3
Fuse
2A(T)
DPST
I L
Live
+ V
(dc)
11