Endress+Hauser Prothermo NMT81 - NMS5 (Ex D [Ia]) Intrinsically Safe Connection

Prothermo NMT81 Electrical connection
Endress+Hauser 51
6.4 NMS5 (Ex d [ia]) intrinsically safe connection
The intrinsically safe NMT81 must be connected to the intrinsically safe HART terminal on
NMS5.
L
N
G
L
N
G
1
ARS
2
ARS
ARS
3
a
4
5
6
7
8
9
+
-
+
-
+
-
b
c
d
+
-
+
-
+
-
10
11
12
13
14
15
d
d
d
16
17
18
19
20
21
COM
HOIST
STOP
+
-
e
f
+
-
+
-
22
23
24
25
26
g
h
i
A0038529
 35 NMS5 terminal
a Power supply
b Non-intrinsically safe HART communication: NRF, etc.
c Digital output Modbus, RS485 serial pulse or HART
d Alarm contact point
e Operation contact point input
f 4 to 20 mA channel 1
g 4 to 20 mA channel 2
h Intrinsically safe HART
i From NMT81 Ex ia
Do not connect NMT81 HART communication cable to terminals 4 and 5 on NMS5/
NMS7. These terminals are designed to connect to Ex d HART communication.