Model DT33x-0700
4-Wire DC I/V Dual Transmitter w/USB
Acromag, Inc. Tel: 248-295-0880
- 13 -
http://www.acromag.com
- 13 -
https://www.acromag.com
USB Connections
This transmitter is configured and calibrated via configuration software that runs on
a Windows-based PC connected to the unit via USB (Windows 7 or later required),
or via a USB-OTG connection to an Android smartphone or tablet using the Acromag
Agility mobile app. Refer to the drawing below to connect your PC or laptop to the
transmitter to reconfigure or calibrate it using this software.
WARNING:
The intent of mating
USB with this transmitter is so that
it can be conveniently set up and
calibrated in a safe area, then
installed in the field which may be
in a hazardous area. Do not
attempt to connect a PC or laptop
to this unit while installed in a
hazardous area, as USB energy
levels could ignite explosive gases
or particles in the air.
•
USB Signal Isolation is recommended and required when connected to a
grounded input
–
Input 1 and USB connections are isolated from each output
and power of this model. USB Isolation is recommended for safety and noise
suppression but required when the input signal happens to be grounded. You
may use Acromag model USB-ISOLATOR to isolate your USB port, or you can
optionally use another USB signal isolator that supports USB Full Speed
operation (12Mbps).
IMPORTANT:
USB logic signals to the transmitter are referenced to the potential of
the transmitter’s input
1 circuit ground. This ground is held in common with USB
ground and USB cable shield ground. Thus, an isolator is required when the input 1
signal is earth grounded and the unit is connected to the USB port of an earth-
grounded PC. You could avoid the use of an isolator if a battery powered laptop
was instead used to connect to the transmitter and the laptop had no other earth
ground connection, either directly or indirectly via a connected peripheral.
!
Note:
Output/Power to Transmitter must
be applied before USB connection (See
Output/Power Connections).
