28
Reference Manual
00809-0100-4130, Rev DC
Installation
January 2019
Installation
2.7.5
NAMUR electronics cassette
Figure 2-26. NAMUR (Light Blue Label)
Note
This electronics cassette is suitable for intrinsically safe applications and requires a certified isolating
barrier. See
“Product Certifications” on page 53
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 every second
LED on continuously
LED flashes every 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
1
2
+
-
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