DI-500/510 Series and DI-750/760 Series Hardware Manual
5B Modules
37
DI-5B43 Isolated DC Transducer Amplifier Input Module
DESCRIPTION
Each DI-5B43 displacement transducer module provides a single channel of displacement transducer input which is
filtered, isolated, scaled, and converted to a high level analog voltage output (see block diagram). This voltage output
is logic switch controlled, which allows these modules to share a common analog bus without the requirement of
external multiplexers.
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.
The DI-5B43 can interface to DC displacement transducers and other devices which require a precision 10VDC sup-
ply and produce a high level output. The 1kHz bandwidth significantly reduces ripple and noise inherent in these
devices.
Transducer excitation is provided from the module by a very stable 10V source. The excitation supply is fully iso-
lated, allowing the amplifier inputs to operate over the full range of the excitation voltage. This feature offers signifi-
cant flexibility in real world applications. Ten full scale input ranges are provided, from ±1V to ±10V, producing ±5V
full scale output.
The input signal is processed through a preamplifier on the field side of the isolation barrier. This preamplifier has a
gain-bandwidth product of 5MHz and is bandwidth limited to 1kHz. After amplification, 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%. Special input
circuits on the DI-5B43 module provide protection of the signal inputs and the isolated excitation supply up to
240VAC.
Ordering Information
MODEL*
MAXIMUM INPUT
EXCITATION
DI-5B43-01
±1V
+10.0Vdc @ 40m
DI-5B43-02A
±2V
+10.0Vdc @ 40m
DI-5B43-03
±3V
+10.0Vdc @ 40m
DI-5B43-04A
±4V
+10.0Vdc @ 40m
DI-5B43-05
±5V
+10.0Vdc @ 40m
4
6
5
3
1
2
3
4
+EXC
+In
-In
-EXC
DC Transducer
(e.g., pressure,
displacement,
acceleration, etc.)
Termination
Block
Surge
Suppression
and
Protection
•
LPF
1
2
NC
NC
Isolated
Excitation
Source
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
•
•
•
•
Free Datasheet http://www.datasheet4u.com/