MACTek BULLET™ – User Manual
DM1101010UAB
Copyright 2009-2010
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The Bullet provides a switchable resistor connecting a 250 Ohm resistor between the
HART and RETURN lead wires. To use the Bullet internal resistor the operator must
properly configure the Device Description (DD). The operator must configure the DD
parameter FIELD DEVICE POWER CONTROL to the – ON setting. Refer to section 2
Configuration, Detailed Setting, Field Device Power Control section for the description
and use of the Device Description and required operator setting.
Figure 1: Multi-Drop Configuration
Bullet with a 4-20mA Transmitter with Battery Powered Operation
The Bullet is connected in series with a 4-20mA Transmitter, which can be analog only
or HART capable. An external battery or other power source (such as solar) is used to
power the system. The Bullet will duty-cycle power to the Transmitter to conserve
power.
Bullet installation to Field Device
The Bullet typical installation to a field device is shown Figure 4.
The Bullet is attached to the field device using the appropriate rated hardware as defined
by the area classification of the installation.
Figure 2: Typical Installation