Emerson 2120 - Page 11

Quick Start Guide
11
December 2016
4.5 NAMUR electronics (light 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 electronics cassette is also suitable for non-hazardous (safe) area
applications. It can only be interchanged with the 8/16 mA cassette.
Do not exceed 8 Vdc.
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
12
+-
EN 50227 / NAMUR
I
ON
= 2.2 ... 2.5 mA
I
OFF
I
FAULT
= 0.8 ... 1.0 mA
+
-
A certified intrinsically safe
isolating amplifier to IEC 60947-5-6
Ex
Ex
8V
dc
< 1.0 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
+
-
>2.2 mA
+
-
<1.0 mA
+
-
>2.2 mA
+
-
<1.0 mA