Dataq DI-500 Series, Руководство пользователя

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DI-500/510 Series and DI-750/760 Series Hardware Manual
5B Modules
25
5. 5B Modules
DI-5B30/31 Analog Voltage Input Modules, Narrow Bandwidth
DESCRIPTION
Each DI-5B30 and DI-5B31 voltage input module provides a single channel of analog input which is filtered, iso-
lated, amplified, and converted to a high level analog voltage output (see block diagram). This voltage output is logic-
switch controlled, allowing these modules to share a common analog bus without the requirement of external multi-
plexers.
The DI-5B modules are designed with a completely isolated computer side circuit which can be floated to ±50V from
Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and
Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously
by simply connecting pin 22, the Read-Enable pin to I/O Common, pin 19.
Signal filtering is accomplished with a six-pole filter which provides 95dB of normal-mode-rejection at 60Hz and
90dB at 50Hz. Two poles of this filter are on the field side of the isolation barrier, and the other four are on the com-
puter side.
After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided
by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or
surges. The module is powered from +5VDC, ±5%.
A special input circuit on the DI-5B30 and DI-5B31 modules provides protection against accidental connection of
power-line voltages up to 240VAC.:
Ordering Information
MODEL INPUT RANGE OUTPUT RANGE
DI-5B30-01 -10mV to +10mV -5V to +5V
DI-5B30-02 -50mV to +50mV -5V to +5V
DI-5B30-03 -100mV to +100mV -5V to +5V
DI-5B31-01 -1V to +1V -5V to +5V
DI-5B31-02 -5V to +5V -5V to +5V
DI-5B31-03 -10V to +10V -5V to +5V
DI-5B31-07* -20V to +20V -5V to +5V
DI-5B31-09* -40V to +40V -5V to +5V
*CSA certification pending.
4
6
5
3
1
2
3
4
+EXC
+In
-In
-EXC
Termination
Block
Surge
Suppression
and
Protection
•
LPF
1
2
NC
NC
Amplifier
Isolated
Computer-Side
Power
+V -V
LPF
20
19
22
V out
I/O Common
RD EN\
Isolated
Field-Side
Power
+V
-V
17
+5V
16
Power Common •
Power
Oscillator
•
•
V
IN
+
-
NC
NC
Free Datasheet http://www.datasheet4u.com/