Endress+Hauser Prothermo NMT81, Руководство по эксплуатации

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Prothermo NMT81 Electrical connection
Hauser 37
6 Electrical connection
6.1 NMT81 (Ex ia) intrinsically safe connection
NMT81, which uses intrinsically safe HART communication, must be connected to the
device's intrinsically safe terminal. Refer to the intrinsic safety regulations for establishing
wiring and field device layout.
1
2 3
5
6
4
A0042752
 32 NMT81 terminal (ATEX ・ Ex ia)
1 Dummy plug
2 + terminal (see Information)
3 - terminal (see Information)
4 Internal ground terminal for the cable shield
5 External ground terminal
6 Shielded twisted pair wire or steel-armored wire
• Only a metal cable gland may be used. The shielded wire on the HART
communication line must be grounded.
• The plug is also mounted at the side of [6] in the figure above prior to shipping. The
material of plug (aluminum or 316L) varies depending on the type of the
transmitter housing material.
Connection table
Connection to NRF590 Connection to NMS5 Connection to NMS8x/NMR8x/NRF81
1)
+ Terminal 24, 26, 28 + Terminal 24 + Terminal E1
- Terminal 25, 27, 29 - Terminal 25 - Terminal E2
1) If an analog Ex i/IS 4 to 20 mA HART module is installed, NMT81 can be connected to slot B2, B3 or C2,
C3.