Emerson 2120 Quick Start Manual page 12

Quick Start Guide
4.6 8/16 mA electronics cassette (dark blue label)
Ex
Ex
High level, dry = on
Dry On
0.3
1
3
10
30
Seconds Delay
+
> 15 mA
LED on continuously
Note
This cassette is suitable for Intrinsically Safe applications and requires an isolating
barrier.
See "Product Certifications" on page 15
This cassette is also suitable for non-hazardous (safe) area applications. It can only
be interchanged with a NAMUR cassette.
12
Dry On Mode
+
Wet On Mode
1 2 3
I
=
ON
I =
OFF
PE
I < 3.7 mA
(Ground)
FAULT
-
+
A certified intrinsically safe barrier
must be used to meet IS requirements
-
+
Wet On
0.3
1
3
10
30
+
< 8.5 mA
LED flashes each
second
OPERATION MODE
Dry On Wet On
Dry
Wet
0.3 0.3
1
1
3
3
10
Wet 10
Dry
30
30
Seconds Delay
15 ... 17 mA U = 24 Vdc Nominal
7.5 ... 8.5 mA
Low level, wet = on
+
> 15 mA
LED on continuously
for Intrinsically Safe approvals.
December 2016
8/16 mA
Dry On Wet On
0.3 0.3
1
1
3
3
10
10
30
30
Seconds Delay
< 8.5 mA
LED flashes each
second
+