45
X-VA-MT3809G-MT3810G-eng/541B182AAG/A/2022-10
Brooks Instrument
Installation Manual MT3809G & MT3810G
Section 2 Installation
Refer to Figures 2-5a/2-5b and 2-8a/2-8b.
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required and explosion proof installation methods must be followed.
Refer to Figure 2-9.
a. The shielded cable must be used for hook up. In case of installation into
explosion hazardeous environments it is important to eliminate a potential
incentive level of circulating current through the cable shield in the event
that there are local differences in chassis ground potential between the
two ends of the cable. Therefore, cable shields shall be connected to
chassis ground (earth) in accordance with the applicable regional & local
installation code. A terminal screw inside the device allows for shield to
chassis connection in case the applicable installation regulation requires
earthing at the transmitter end.
b. The pulse and alarm outputs function as isolated switch closures
(optically isolated open collector) and must be supplied with a power
source, as shown in wiring diagram, Figure 2-6a/2-6b. Observe polarity
and do not exceed 30 volts for the supply and limit load current to 20 mA
for each output.
F
OUNDATION
Fieldbus Transmitter Intrinsically Safe Installation
For intrinsically safe installation, intrinsic safety barrier selection, cable
parameters, and power limits, follow Figures 2-12 through 2-15.
