Field Device Power Control - Switching Mode - GE Masoneilan VECTOR V1100 Instruction Manual

GE Oil & Gas
Field Device Cutoff Enable
This option allows the VECTOR V1100 to cutoff power to the field devices when the direct
power input drops below the voltage set in the Field Device Cutoff Voltage parameter. To use
the cutoff, the Field Device Power control must set to either On or Switching. When this
parameter is disabled, this cutoff will not occur and the Field Device Cutoff Voltage parameter
is not used.
Field Device Cutoff Voltage
When enabled, defines the direct power voltage at which the Field Device Cutoff occurs. There
is a built-in 0.5 V hysteresis in this to bring the VECTOR V1100 out of the Field Device Cutoff
mode.
Field Device Power Control – Switching Mode
When the VECTOR V1100 is used in the Field Device Power Control Switching mode, the
VECTOR V1100 controls this switch to power HART field devices on and off as needed by
network operation. This is useful when running off a limited power source, such as an external
battery or solar cell, and can be used to power off the HART field devices between
measurements.
When used in combination with Burst mode, the VECTOR V1100 schedules measurements
from the connected HART devices, and turns on the loop when a scheduled measurement is
needed. After all the measurements have been read from the connected HART devices, the
VECTOR V1100 removes power from the devices by turning off the Field Device Power Control
switch.
For this mode to work properly, you need to determine and configure the Power On Time
parameter for the connected wired HART field devices.
Field Device Turn On Time The time in seconds that a HART field device needs to be powered on
in order to obtain an accurate measurement.
Improper selection of the Power On Time parameter can lead to a
NOTE
field device reporting measurements outside of the published
tolerances for the device. Consult the field device documentation
or contact the field device vendor to determine this information.
The Power On Time is different for every Field Device. If not
specified in the Field Device data sheet, contact the Field Device
manufacturer for this parameter.
Incorrect measurement reading from the Field Device can result if
Power On Time parameter is not set properly. The Field Device
may not have adequate time to power up, initialize and respond
with a correct measurement value prior to power being removed.
VECTOR V1100 Wireless Adapter
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