Acromag DT335-0700, User Manual

Page: 34 / 37

Model DT335-0700 Dual RTD/Resistance Input Transmitter w/USB
Acromag, Inc. Tel: 248-295-0880 - 34 -
http://www.acromag.com
- 34 - https://www.acromag.com
Outputs...continued
IMPORTANT:
Input and output
ranges may be rescaled to ranges
smaller than nominal, which can
increase potential error as
resolution and signal-to-noise
ratio are diminished for small I/O
spans. Each halving of the range
will drop resolution by 1 bit. In
general, rated accuracy can be
achieved for effective I/O
resolution equal or greater than
12-bit (1/4096).
16-bit Table 3: Output Ranges and Resolution w/Over-Range
DAC Voltage Output Current Output
COUNT 0-5V 0-10V ±5V ±10V 0-20mA 4-20mA
0 0V 0V -5.5V -11V 0mA 0mA
2979 -5.0V -10V
10923 4mA 4mA
54612 20mA 20mA
59577 5.0V 10.0V
62556 +5.0V +10V
65535 5.5V 11.0V +5.5V +11V 24mA 24mA
RES 1/59577 1/59577 1/59577 1/59577 1/54612 1/43689
1 lsb 83.925uV 167.8uV 167.8uV 335.7uV 0.34132uA 0.34132uA
%Span 0.001678% 0.001707% 0.002133%
Output Response Time: The maximum time measured for the output signal to reach
98% of its transition for a step change in the input driving current output to a 500Ω
load with the input set to No filter, Low filter, Medium filter, and High filter.
INPUT FILTER TYPICAL OUT RESPONSE TIME TO 98% OF TRANSITION
NONE 25ms
LOW 44ms
MEDIUM 146ms
HIGH 1068ms
Output Load: The voltage outputs can drive loads down to 1KΩ minimum. The
current outputs can drive 21mA DC into 0- 525Ω.
USB Interface
The USB interface includes a USB MINI-B socket for temporary connection to a PC or
laptop for setup, reconfiguration, and calibration purposes. USB isolation is required
when input is connected to a grounded input sensor at channel 1 (see
“IMPORTANT”
below). During reconfiguration & recalibration, the transmitter receives its power
from its separate DC power connection (via DIN rail bus or power terminal TB5), not
USB. As such, you must connect power to the unit when you connect USB.
CAUTION: Do not attempt to connect USB in a hazardous environment. Transmitter
should be set up and configured in a safe environment only.
Data Rate: USB v1.1 full-speed only, at 12Mbps. Up to 32K commands per second.
USB 2.0 compatible.
Transient Protection: Adds transient voltage protection on USB power & data lines.
Cable Length/Connection Distance : 5.0meters maximum.
Driver: No special drivers required. Uses the built-in USB Human Interface Device
(HID) drivers of the Windows Operating System (Windows XP or later versions only).
!