Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: 248-295-0880
- 12 -
http://www.acromag.com
- 12 -
https://www.acromag.com
USB Connections
Transmitter is setup, configured, and calibrated via configuration software that runs
on a Windows-based PC connected via USB (Windows 7 or later required), or a USB
connection to a compatible Android-based tablet or smartphone with our Agility
mobile APP installed. Refer to the drawing below to connect your PC or laptop to
the transmitter for reconfiguration and calibration using this software (the optional
connection to an Android smartphone or tablet would typically not require the use
of an isolator, because those devices are battery powered).
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 Required (See Below) -
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).
•
Configuration Requires USB and Loop Power
- This transmitter draws power
from both the current loop and from USB during set up.
IMPORTANT:
USB logic signals to the unit are referenced to the potential of its
internal signal common. This ground is held in common with the USB ground and
shield ground. The potential of a transmitter
’s curre
nt output pin (output minus)
relative to earth ground varies with the load current and resistance (net IR drop).
Without isolation, IR drop would drive a potential difference between the normally
grounded current loop and grounded USB connection at the PC, causing a ground
loop that would inhibit set up & calibration, or may even damage the transmitter. It
is recommended you use an isolated USB connection. Alternatively, you could avoid
using an isolator if a battery powered laptop is used to connect to the transmitter,
and the laptop has no earth ground connection, either directly or via a connected
peripheral.
!
Note:
Output/Power to Transmitter must
be applied before USB connection
(See Output/Power Connections).