Emerson 2120 - Page 12

December 2016
12
Quick Start Guide
4.6 8/16 mA electronics cassette (dark blue label)
Note
This cassette is suitable for Intrinsically Safe applications and requires an isolating
barrier.
See “Product Certifications” on page 15 for Intrinsically Safe approvals.
This cassette is also suitable for non-hazardous (safe) area applications. It can only
be interchanged with a NAMUR cassette.
High level, dry = on Low level, wet = on
LED on continuously
LED flashes each
second
LED on continuously
LED flashes each
second
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
8/16 mA
12
3
+
Drives 4-20 mA Analog Input
I
ON
=
I
OFF
=
+
-
+
A certified intrinsically safe barrier
must be used to meet IS requirements
Ex
Ex
15 ... 17 mA
7.5 ... 8.5 mA
-
PE
(Ground)
U
=
24 Vdc Nominal
I
FAULT
< 3.7 mA
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
+
> 15 mA
+
< 8.5 mA
+
> 15 mA
+
< 8.5 mA