Brooks Instrument MT3809G - Manual (Page 35)

Installation and Operation Manual
X-VA-MT3809G-MT3810G-eng
Part Number: 541B182AAG
September, 2013
Models MT3809G & MT3810G
2-5
Section 2 Installation
Range parameter is set at 500 and the AO Lo-Range is set at 100. Like
other common parameters, the AO Hi-Range and AO Lo-Range can be set
by Brooks prior to shipment.
c. Microprocessor transmitter wiring connections. Refer to Figures 1-4, 1-5
and 1-8.
Typically applications require only the use of the 2 wire loop analog signal. In
some applications where transmitters and actuators are widely separated
(e.g. tank farms), devices are wired in a multi-drop configuration to save
wiring costs. Each unit is given an individual HART address in the range of 1-
15 to distinguish each unit during communications over a common wire pair.
In this configuration, the 4-20 mA output signal cannot be used.
To install the typical transmitter analog output configuration:
1. For intrinsically safe installation, intrinsic safety barrier selection, cable
parameters, and power supply limits must be in accordance with the entity
parameters shown in Figure 1-4. Alternatively, the optional intrinsically safe
power supply available from Brooks may be used. Cable parameters for
inductance and capacitance still apply.
Note: To ensure full EMC protection the ferrite core included with the meter must
be installed to the input power I/O cable at the supply end of cable.
2. If the area classification is Division 2, a barrier is not required and cable
parameters are not applicable. The electrical code will require the use of
conduit for wire protection. Refer to Figure 1-4.
3. For flameproof installation, the optional explosion proof enclosure is
required and explosion proof installation methods must be followed. Refer
to Figure 1-6.
4. The shielded cable must be used for hook-up. The shield should be
connected to chassis ground at the transmitter end and should be taped
up and not connected at the receiver end. Insulation of the shield at the
receiving end is especially important for intrinsically safe installations.
5. The maximum resistance of the loop resistor, the associated cable and
the barrier is determined by the power supply voltage and is shown
graphically in Figure 1-9.