B&B Electronics 4 Channel Input Buffer Board SDAIBB - Manual (Page 3)

SDAIBB1300 Manual 1
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
Chapter 1: General Information
Introduction
The SDAIBB is a data acquisition module with four input buffers
with selectable gains and selectable output offsets. The gain can be set
from 1 to 1000 with a single resistor change. Gains of 1 and 22.28 are
provided. The output can be offset by the provided 0 V for positive ended
systems, by the provided 2.5 V for plus/minus applications, or by a user
selected amount that is brought in on terminal blocks or solder pads. The
SDAIBB is designed to amplify single ended or differential signals in the
range of –0.15 to +5.0 V into +0.01 to +5.0 V signals that are compatible
with the B&B line of data acquisition products. Sensor and power supply
connections are made through terminal blocks or solder pads. A/D
connections are made through DB25 connectors and are designed to
connect to many of the B&B data acquisition products. All lines on the
DB25 connectors are carried through, allowing boards to be “stacked” for
expanding the number of channels or bringing other lines in or out. Three
SDAIBB boards will fill all 11 channels of the 232SDAxx or 485SDAxx
modules.
Specifications
Number of Channels 4
Gain 1 to 1000
1 and 22.28 provided
Max. Gain Error 0.35%
Max. Gain Drift 25 ppm
Max. Input Offset Voltage 200
µ
V
Max. Input Offset Voltage Drift 2
µ
V/°C
Input Impedance 2 G
Ω
, 2pF
Input Voltage Range
Gain = 1 -0.15 to +5.00 V
Gain > 1 -0.15 to +4.60 V
Output Voltage Range
Gain = 1 0.01 to 5.00 V
Gain > 1 0.01 to 4.95 V