Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: 248-295-0880
[
19
]
http://www.acromag.com
Configuration
At this point, you can click the
“I/O Config/Test”
tab to begin
configuring the transmitter, or to optionally test its operation. The
I/O Config/Test window is the image shown at left.
When you click the “I/O Config/Test” tab, the software retrieves the
transmitter’s current configuration and displays it similar to the
image shown at left.
If you are connected to a transmitter, the initial I/O Config page
represents the current configuration of the connected transmitter
before making changes. Otherwise, if you have loaded the
configuration from a saved a file, or if you have made changes to any
fields, you can click the
[Get I/O Config]
button to retrieve the
transmitter’s current configuration.
NOTE:
If you make any changes to the selections indicated, the only
way to preserve your changes is to write them to the transmitter by
clicking the
[Send I/O Config]
button after completing your
selections, or save them to a file by opening the
“File”
menu in the
upper left-hand corner of the window and selecting
“Save As…”
.
Select the Threshold...
The Threshold should be selected based on the type of input signal
the transmitter is measuring. Select Bipolar when the input signal is
zero crossing. Select Unipolar when the input signal is non-zero
crossing. There are two levels of hysteresis available for both Bipolar
and Unipolar options. The hysteresis is listed in parenthesis.
Select the Measurement...
Select Frequency to measure the frequency of the input signal. Select
Duty Cycle to measure the duty cycle of the input signal.
NOTE:
The maximum input frequency when
Measurement
is set to
Duty Cycle is 20KHz.
Select the Pull Up/Down...
Select Pull-Up to pull the +
FINP terminal to +5VDC through 2.7KΩ
.
Select Pull-Down to pull the +FINP terminal to the –FRTN terminal
through 1KΩ.
Select Disabled to disconnect the internal resistors.
Refer to the example input connections in the Sensor Input
Connections section for common sensor configurations.
WARNING:
Do not exceed 15VDC with the internal pull-up or pull-
down resistors enabled, or damage to the circuit will result. Limit
internal pull-up/pull-down resistor power to less than 0.25W.
Disable the Pull-up/Pull-down if the input to the transmitter is AC
mains voltage (120V
RMS
)
.
