Page 1
8 channel measuring amplifier BSC8D
Operating Instructions
15-208 Revision A
BSC8D SubD15 (front side)
BSC8D M12 (front side)
BSC16D (rear side)
BSC8D 6A (front side)
Version: 11.09.2013
Page 2
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
2
Contents
Description ........................................................................................................................................... 3
Advantages ........................................................................................................................................... 3
Terminal assignment ............................................................................................................................ 4
Wiring diagram for quarter bridges and half bridges ....................................................................... 5
Pin assignment for 37-pin Sub-D ..................................................................................................... 5
Assignment for BSC8S without USB port (slave unit).................................................................... 6
Assignment for BSC8D with USB port ....................................................................................... 6
Assignment for BSC16D with USB port ..................................................................................... 7
Activating the bridge completion for strain gauge quarter bridges ................................................. 8
Accessories........................................................................................................................................... 9
Technical data ...................................................................................................................................... 9
Page 3
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
3
Description
The measuring amplifier BSC8D is a DC voltage measuring amplifier with USB interface.
The resolution is 16 bit with a total sampling rate of 200kHz. The integrated A/D
measurement card NI USB 6210 has up to16 analog input channels and digital
inputs/outputs which are led outside on a 37-pin Sub-D socket.
To upgrade to 16 channels, a second, structurally identical housing without A/D measuring
card is connected to the master unit via a 37-pin flat ribbon cable.
Several 16-channel devices can be evaluated using the software.
The analog input signals from the strain gauges are amplified by 8 or 16 precision
measuring amplifiers GSV-1L to ± 5 volt and digitalized by the integrated A/D card with
USB interface.
A supplement for quarter bridges 350 ohm, and for half bridges 120, 350 or 1000 ohm is
included in the BSC8D and can be activated via solder bridges.
The benefit of the GSV-1L measuring amplifier used is the low-noise amplification and
automatic analog zero adjustment.
The zero adjustment is triggered via a switch or via software.
The zero point is stored internally and is available again after a voltage interruption.
Due to the automatic zero adjustment, the low-noise amplifier and the optimally adjusted
Bessel filter, high input amplifications can also be set for the A/D digital converter in order
to record the smallest signals.
The supply voltage is 12...24V DC and is supplied via a plug-in power supply provided.
Advantages
compact dimensions and low weight,
simple connection of strain gauge full, half and quarter bridges via 5-pin M12 or Sub-
D15 plug connectors,
automatic zero adjustment with tare switch across 100% of the measuring range
(3.5mV/V),
high limit frequencies up to 10kHz per channel as an order option (2.5kHz standard)
low-noise input stage for high measurement resolution,
high amplification of the output signal possible through automatic zero adjustment,
Features:
USB port,
16 Bit, 200kHz total sampling rate,
8x strain gauge input, 8x analog output ±10 V, 8x IO
Optional 16x strain gauge input
Zero adjustment across 100% of the measuring range
Integrated bridge completion 350 ohm can be activated through solder bridges
Analog filter 2.5kHz, optional 250Hz or 10kHz
Page 4
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
4
low current consumption and supply with car supply voltage,
stable strain gauge supply for up to 4 parallel 350 ohm full bridges per channel.
Terminal assignment
Socket
Spring contacts
Pin No.
Terminal assignment
ME
SAC-5P
(Top view)
1
+US positive bridge power supply
brown
brown
2
-US negative bridge power supply
white
white
3
+UD positive differential input
green
blue
4
-UD negative differential input
yellow
black
5
AUX quarter bridge completion 350Ω,
grey
grey
Table 1: Terminal assignment round connector 5-pin M12
Socket
Spring contacts
Pin No.
Terminal assignment
ME
SAC-5P
(Top view)
1
GND (-Us) for shielding
5
-US negative bridge power supply
white
white
6
+US positive bridge power supply
brown
brown
8
+UD positive differential input
green
blue
15
-UD negative differential input
yellow
black
14
AUX quarter bridge completion 350Ω
grey
grey
Table 2: Terminal assignment Sub-D 15 socket
Plug
Pin contacts
Pin No.
Terminal assignment
SAC-5P
(Top view)
1
Supply voltage 12...24 V DC
brown
2
not assigned
white
3
GND supply voltage
blue
4
Tare
black
Table 3: Connection for voltage supply, M8 plug connector
Page 5
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
5
Wiring diagram for quarter bridges and half bridges
To connect quarter or half bridges, the measuring amplifier must be configured
accordingly. The supplement resistors are connected by closing the solder bridges. For
closed solder bridges, the connection of strain gauge full bridges is possible but reduces
the sensitivity to the supplied calibration by approx. 1% and is independent of the terminal
resistance of the strain gauge.
Strain gauge quarter bridges are connected in three-wire technology.
As a result, the influence of the supply cable on the zero point and the zero point drift is
compensated.
Quarter bridge
Half bridge
5-pin round connector
5-pin round connector
5-pin Sub-D socket
5-pin Sub-D socket
Pin assignment for 37-pin Sub-D
Page 6
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
6
Assignment for BSC8S without USB port (slave unit)
PIN
BSC8S
1
CH1 - Channel 1
2
CH2 - Channel 2
3
CH3 - Channel 3
4
CH4 - Channel 4
5
CH5 - Channel 5
6
CH6 - Channel 6
7
CH7 - Channel 7
8
CH8 - Channel 8
20-27
GND / Ground
35
“Tare - function” - Display by “error” LED
All pins not listed are not connected / n.c.
Assignment for BSC8D with USB port
PIN
GSV-1A8USB
NI-6210-USB
1
AI 8
Input ±10V
2
AI 9
Input ±10V
3
AI 10
Input ±10V
4
AI 11
Input ±10V
5
AI 12
Input ±10V
6
AI 13
Input ±10V
7
AI 14
Input ±10V
8
AI 15
Input ±10V
9
CH1 - Channel
1
Output ±5V
AI 0
Input assigned
10
CH2 - Channel
2
Output ±5V
AI 1
Input assigned
11
CH3 - Channel
3
Output ±5V
AI 2
Input assigned
12
CH4 - Channel
4
Output ±5V
AI 3
Input assigned
13
CH5 - Channel
5
Output ±5V
AI 4
Input assigned
14
CH6 - Channel
6
Output ±5V
AI 5
Input assigned
15
CH7 - Channel
7
Output ±5V
AI 6
Input assigned
Page 7
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
7
16
CH8 - Channel
8
Output ±5V
AI 7
Input assigned
20-27
Ground
Analog ground
AI GND
Analog ground
28
P0.0
Digital input
29
P0.1
Digital input
30
P0.2
Digital input
31
P0.3
Digital input
32
P1.0
Digital output
33
P1.1
Digital output
34
P1.2
Digital output
35
Tare
reserved
P1.3
Reserved for “Tare -Function”
Display by “error” LED
36
D GND
Digital ground
All pins not listed are not connected / n.c.
Assignment for BSC16D with USB port
The measuring amplifier BSC16D consists of 1 x BSC8D and 1x BSC8S. Both devices are
connected via a flat ribbon cable at the rear.
PIN
GSV-1A16USB
NI-6210-USB
1
Channel 9
Output ±5V
AI 8
Input assigned
2
Channel 10
Output ±5V
AI 9
Input assigned
3
Channel 11
Output ±5V
AI 10
Input assigned
4
Channel 12
Output ±5V
AI 11
Input assigned
5
Channel 13
Output ±5V
AI 12
Input assigned
6
Channel 14
Output ±5V
AI 13
Input assigned
7
Channel 15
Output ±5V
AI 14
Input assigned
8
Channel 16
Output ±5V
AI 15
Input assigned
9
Channel 1
Output ±5V
AI 0
Input assigned
10
Channel 2
Output ±5V
AI 1
Input assigned
11
Channel 3
Output ±5V
AI 2
Input assigned
12
Channel 4
Output ±5V
AI 3
Input assigned
13
Channel 5
Output ±5V
AI 4
Input assigned
14
Channel 6
Output ±5V
AI 5
Input assigned
15
Channel 7
Output ±5V
AI 6
Input assigned
16
Channel 8
Output ±5V
AI 7
Input assigned
20-27
Ground
Analog ground
AI GND
Analog ground
Page 8
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
8
28
P0.0
Digital input
29
P0.1
Digital input
30
P0.2
Digital input
31
P0.3
Digital input
32
P1.0
Digital output
33
P1.1
Digital output
34
P1.2
Digital output
35
Tare
reserved
P1.3
Reserved for “Tare -Function”
Display by “error” LED
36
D GND
Digital ground
All pins not listed are not connected / n.c.
Activating the bridge completion for strain gauge quarter bridges
For closed solder bridges, connecting quarter bridges to 350 ohm is possible. The use of
half and full bridges is also possible with closed solder bridges. The measurement result
for full bridges is then displayed too small by approx. 1% to 2%. Optionally, the measuring
amplifier is supplied with 120 ohm or 1000 ohm bridge completion.
Page 9
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
9
Accessories
Sensor-actuator cable with
M12 plug connector
Grounding plug (included)
Cable for connecting devices
“BSC8D” and “BSC8S”, (included)
Technical data
Accuracy class
0.1 % Inputs
Measurement range
2 (optional 3.5)
mV/V
Resolution of the input signal
16
bit
Strain gauge inputs
Full bridge
70... 50000 ohm
ohm
Common mode rejection
for 60Hz common-mode signal
95-110
dB
Measuring frequencies
Total sampling rate
200
kHz
Analog filter
2500, optional 250 or 10000
Hz
Outputs
Analog output
Output resistance
±5
47
volt
ohm
Bridge supply voltage
5
volt
Zero adjustment
Tolerance
Duration
Resolution on falling edge after at least
4ms high level (3.5V ... 30V)
<5, type <2.5
<90
mV
ms
Supply
Supply voltage
Power consumption 24V (12V) DC
11...28
300
V DC
mA
Page 10
Interface Inc. ● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
10
Temperature range
Nominal temperature range
Storage temperature range
Drift of zero point
Drift of sensitivity
-10…+65
-20…+65
< 0.05
< 0.01
°C
°C
%/10°C
%/10°C
Dimensions
L x W x H
75 x 38 x 45
mm x mm x mm
Protection class
IP40
AD converter
Type
NI USB 6210,
Input voltages
-10 ...+10
V
Number of digital inputs
4 Number of digital outputs
4 Counter timer
2 (32 Bit)
Subject to modifications.
All details describe our products in a general form.
They constitute neither warranty of characteristics in the sense of § 459, Paragraph 2, of the German Civil Code nor
grounds for liability.
Made in Germany Copyright 1999-2013
ME-Meßsysteme GmbH
Loading...