Azbil JTD720A, Руководство пользователя, Страница: 32 / 76

Installation Azbil Corporation
2-14 Model JTD720A - Smart Multivariable Transmitter
2-3-2 : Wiring for explosion-proof model
Guideline Wire explosion-proof models while referring to 2-3-1, “Wiring for general-
use model” and the explanation below. When installing explosion-proof models,
follow the guidelines in Recommended Practices for Explosion-Protected Electrical
Installations in General Industries (2006, for gases and vapors) or Users’ Guidelines
for Installations for Explosive Atmospheres in General Industry, which are technical
recommendations from the National Institute of Occupational Safety and Health.
CAUTION
This device has undergone explosion-proof testing and obtained
certification, with the condition that the pressure-resistant packing
cable adapter included with this device must be used as part of
the transmitter case. Therefore, if a cable adapter other than the
included one is used for external wiring, this device’s explosion-
proof performance is not guaranteed.
Tighten the case cover all the way and lock it. For explosion-proof
models, locking the lid of the transmitter case is required.
Lock
This instrument has a locking structure. Before wiring, unlock the transmitter case
using an M3 mm hexagon wrench.
Lock
Figure 2-12 Transmitter case lock
Connecting external wires
When running cables into this device, use the included pressure-resistant packing
cable adapter shown in the figure below or a conduit fitting. Use cables that are
temperature-resistant to at least 65 °C
Pressure-resistant packing
cable adapter
Figure 2-13 Pressure-resistant packing cable adapter