![Honeywell STT750 SmartLine Скачать руководство пользователя страница 26](http://html.mh-extra.com/html/honeywell/stt750-smartline/stt750-smartline_user-manual_155003026.webp)
Page 16
STT750
Temperature Transmitter User’s Manual
Revision 4
3.5.4. Grounding and Lightning Protection
Connect a wire from the Earth Ground Clamp or to the Internal Ground Connection (see
Figure 12
) to
Earth Ground to make the protection effective. Use a size 8 AWG or (8.37mm
2
) bare or green
covered wire for this connection.
For ungrounded Thermocouple, mV, RTD or ohm inputs connect the input wiring shield(s) to the
Internal Ground Connection shown in
Figure 12
.
For grounded Thermocouple inputs, connect the Internal Ground Connection shown in
Figure 12
to
the same earth ground as used by the thermocouple.
As noted above, the Loop Power wiring shield should only be connected to earth ground at the power
supply end.
3.5.5. Explosion-Proof Conduit Seal
When installed as explosion proof in a Division 1 / Zone 1, Ex d Hazardous Location,
keep covers tight while the Transmitter is energized. Disconnect power to the Transmitter in
the non-hazardous area prior to removing end caps for service.
When installed as non-incendive equipment in a Division 2 hazardous location, disconnect
power to the Transmitter in the non-hazardous area, or determine that the location is non-
hazardous before disconnecting or connecting the Transmitter wires.
Transmitters installed as explosion proof in Class I, Division 1, Group A Hazardous (classified)
locations in accordance with ANSI/NFPA 70, the US National Electrical Code, Canadian Electric
Code CCSAC22.1, with 1/2 inch conduit do not require an explosion-proof seal for installation. If
3/4 inch conduit is used, a LISTED explosion proof seal to be installed in the conduit, within 18
inches (457.2 mm) of the transmitter.
Crouse-Hinds type EYS/EYD or EYSX/EYDX are examples of LISTED explosion proof seals that
meet this requirement. Transmitters installed as explosion proof in Class I, Division 1, Group A, B, C
or D hazardous (classified) locations do not require that explosion proof seal be installed in the
conduit.
Содержание STT750 SmartLine
Страница 21: ...Revision 4 STT750 Temperature Transmitter User s Manual Page 11 Figure 9 STT750 no adapter housing dimensions ...
Страница 51: ...Revision 4 STT750 Temperature Transmitter User s Manual Page 41 ...
Страница 52: ...Page 42 STT750 Temperature Transmitter User s Manual Revision 4 ...
Страница 53: ...Revision 4 STT750 Temperature Transmitter User s Manual Page 43 ...
Страница 62: ...Page 52 STT750 Temperature Transmitter User s Manual Revision 4 ...
Страница 63: ...Revision 4 STT750 Temperature Transmitter User s Manual Page 53 ...
Страница 64: ...Page 54 STT750 Temperature Transmitter User s Manual Revision 4 ...
Страница 65: ...Revision 4 STT750 Temperature Transmitter User s Manual Page 55 ...
Страница 66: ...Page 56 STT750 Temperature Transmitter User s Manual Revision 4 ...