Technical Specifications

475
Configure Power Tab
Configure
Buttons and Fields
Adapter Power
Setting
Use this pulldown list to select the type of adapter power:
 Loop Powered - (1V)
 Loop Powered - (1.5 V)
 Loop Powered - (2.0 V)
 Loop Powered - (2.5 V)
 Direct Powered - High Power
 Direct Powered - Power Saving
 Direct Powered - External Battery
Field Device Power
Control
When used in a direct power configuration, the VECTOR can activate a
switchable terminating resistor between the HART and the RETURN signal
wires. This eliminates the need for an external terminating resistor in some
installations, allowing for a switchable field device power and controlled
automatically by the VECTOR.
 Off: Sets so the field device power control switch is never connected.
 On: Sets so the field device power control switch is always connected.
You can then choose the enable the Field Device Cutoff Enable
feature.
 Switching: Sets the device to switching mode controlled by the
VECTOR.
The VECTOR powers on and off HART field devices as needed by the
network operation for measurements. Use this when running off a
limited power source, such as an external battery or solar cell.
When used in combination with Burst mode, the VECTOR schedules
measurements from the connected HART devices, and turns on the
loop when a scheduled measurement is needed.
For this mode to work properly, you must determine and configure
Field Device Turn On Time parameter for the connected wired HART
field devices.
Switching mode has two possible configurations:
 With Field Device Cutoff Enable disabled. This requires setting Field
Device Turn On Time.
 With Field Device Cutoff Enable enabled. This requires setting Field
Device Turn On Time and Field Device Cutoff Voltage.
Field Device Turn On
Time
Enter the lag time between when a loop is turned on and when communica-
tions with subdevices commences.