Brooks MT3809G - 2-7 Electrical Connections to MT3809 with FOUNDATION Fieldbus Transmitter

Installation and Operation Manual
X-VA-MT3809G-MT3810G-eng
Part Number: 541B182AAG
July, 2018
Models MT3809G & MT3810G
2-7 Electrical Connections to MT3809 with Foundation Fieldbus Transmitter, Alarms and Pulse Output
a) Before electrical connection, install the meter into the pipeline as
described in previous Section 2-5.
b) For electrical installation follow the general Foundation Fieldbus
practices and take the following into account:
i. To avoid electrical interference and to meet the Electro Magnetic
Compatibilty (EMC directive) requirements, use shielded twisted pair
cables.
ii. 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.
iii. Ensuring a properly specied power supply:
• Bus supply voltage 9 .. 32 Vdc
• Nominal current 12mA
iv. Use cables as specied in IEC 61158-2. Stay below the maximum
allowable cable length which depends upon the cable specications, the
number of network devices and the network topology. Connect the
transmitter to the network following IEC 61158-2.
c) The housing of the transmitter should be grounded in accordance with
the applicable installation regulations. When the device is not sufciently
grounded via the process cables, a grounding terminal screw is available
on the transmitter housing for earth connection.
d) Transmitter wiring connection diagrams are given in Section 2-7-1
Ensure that the installation complies with given hazardous area protection
requirements.
e) Transmitter wiring connection diagrams are given is Section 2-7-1.
Ensure that installation complies with given hazardous area protection
requirements.
i. Intrinsically safe installations require the use of barriers, power supply
limits and cable parameters as shown in the installation diagram. All
connections are made in the transmitter housing.
Refer to Figures 2-5a/2-5b and 2-8a/2-8b.
ii. If the area classication is Division 2, barriers are not required and
cable parameters are not applicable. However, the electrical code will
require the use of conduit for wire protection.
Refer to Figures 2-5a/2-5b and 2-8a/2-8b.
iii. For ameproof installation the optional explosion proof enclosure is
required and explosion proof installation methods must be followed.
Refer to Figure 2-9.