KYOWA DBV-120A-8 User manual

IM-A-1100 February 2016
INSTRUCTION MANUAL
DBV-120A-8
DBV-350A-8
ONE-TOUCH TYPE BRIDGE BOX
Thank you for purchasing KYOWA’s product DBV-120A-8/DBV-350A-8
One-touch Type Bridge Box.
Read this Instruction Manual carefully in order to make full use of the high
performance capabilities of the product.
Do not use the product in methods other than described in this Manual.
Generally, company names and trade names described in this Instruction Manual are trademarks or registered
trademarks of the companies.
This Instruction Manual may not be copied or reproduced, in whole or part, without consent of KYOWA.
Copyright © Kyowa Electronic Instruments Co., Ltd. All rights reserved.
The contents of the Instruction Manual and specifications of the software are subject to change without prior
notice.

1

CONTENTS
STANDARD ACCESSORIES........................................................................................................................ 1
OPTIONS......................................................................................................................................................... 1
SAFETY PRECAUTIONS............................................................................................................................. 2
PRIOR TO USE .............................................................................................................................................. 2
SAFETY SYMBOLS ...................................................................................................................................... 2
NOTATIONS USED IN THE INSTRUCTION MANUAL........................................................................ 4
1. PRODUCT OUTLINE ............................................................................................................................... 5
1-1 PRODUCT OUTLINE ......................................................................................................................... 5
1-2 FEATURES ........................................................................................................................................... 5
2. PARTS AND FUNCTIONS........................................................................................................................ 6
3. CONNECTING FORM.............................................................................................................................. 8
3-1 SETTING FORM OF GAGE MODE ................................................................................................ 8
3-2 CONNECTING STRAIN GAGE........................................................................................................ 9
3-3 CONNECTING STRAIN METER....................................................................................................11
4. SELECT LED............................................................................................................................................ 13
4-1 OUTLINE............................................................................................................................................ 13
4-2 WITH THE EDX-3000A/B ................................................................................................................ 13
5. SPECIFICATIONS................................................................................................................................... 14
6. FOR SCREW HOLES ON BOTTOM PANEL ..................................................................................... 15
7. FOR OUTSIDE DRAWING AND DIMENSIONS OF BRIDGE BOX MOUNTING BOARD....... 16
8. OUTSIDE DRAWING.............................................................................................................................. 17

1
This Instruction Manual describes One-touch Type Bridge Box DBV-120A-8(C) and DBV-350A-8(C)
(hereinafter referred to as the Bridge Box).
STANDARD ACCESSORIES
The Bridge Box comes with the following standard accessories. After unpacking, check to be sure that
they are included.
Small Screwdriver ................................
.............................
1
Rubber Foot ................................
................................
4
Instruction Manual ................................
............................
1
Test Data Sheet and Warranty
................................
1 each
For the DBV-120A-8 and DBV-350A-8
N-104 Cable................................
................................
1
For the DBV-120A-8C and DBV-350A-8C
N-105 Cable................................
................................
1
OPTIONS
• N-104 Cable (8 NDIS connectors equipped)
• N-105 Cable (Connector for the CDV-40B/A equipped)
• Bridge box mounting board

2
SAFETY PRECAUTIONS
The Bridge Box is designed in accordance with the “4. SPECIFICATIONS.”
Do not use the Bridge Box in an environment exceeding the specifications.
Or, failure of the Bridge Box may result.
PRIOR TO USE
This Instruction Manual describes detailed instructions for operating the Bridge Box.
For safe use of the Bridge Box, do not forget to read the “Safety Precautions” prior to use.
Kyowa Electronic Instruments Co., Ltd. assumes no liability for any damages resulting from user’s
failure to comply with the safety precautions.
SAFETY SYMBOLS
For safety operation of the Bridge Box, the following symbol marks are used in the Instruction Manual.
WARNING
Improper operation of the system may result in death or severe injury of
the operator.
CAUTION
Improper operation of the system may result in injury of the operator and
physical damage of the system.
WARNING
●Inflammable Gaseous Environment
To prevent fire and explosion hazards, do not operate the Bridge Box where it is exposed to
inflammable gases, inflammable vapors or inflammable dust.
●Do not use it in moisture, a dusty place, and the place where lamp soot is hit.
●Do not disassemble the Bridge Box.
Or, deterioration or malfunction of the instrument may result.
●Protective Ground
Be sure to ground the GND terminal.
Or, it may cause an electric shock hazard, lower the performance, and cause trouble.

3
CAUTION
●Use the Bridge Box in the specified operating temperature range 0 to 40ºC.
Use at temperatures exceeding the specified range may lower the performance and cause trouble.
If use under direct sunlight or in a cold place is inevitable, prepare a sunscreen or take proper measures
to keep it warm.
●Use in the specified operating humidity range 20 to 85%.
Use in a humid place exceeding the specified range or where it is exposed to splashing water may
lower the performance and cause trouble.
●Immediately stop the Bridge Box if operating environment changes abruptly.
Leave the Bridge Box as it is until it becomes adaptable to the environment.
Abrupt change in ambient temperature due to transportation, etc. may cause dew condensation result
to deteriorate its performance and cause trouble.
●Do not use the Bridge Box at a location with excessive vibration and impact.
Use the Bridge Box in the specified operating range.
Or, it may deteriorate its performance and cause trouble.
Adopt vibration-proof measures such as shock absorber, etc.
●Note that it causes the breakdown when it drops or the high impact is added when it transports it.
●Do not use the Bridge Box in strong electromagnetic field.
Use the Bridge Box in a magnetic field environment where the PC may be used.
If the Bridge Box is used near devices generating strong magnetic field such as the telemetry system,
microwave oven, electronic furnace, etc., its performance may be lowered and erroneous operation and
trouble may result.
●Do not pull cords and cables.
Lay cords and cables with a certain allowance so that o unreasonable force is applied to the
connections.
Pulling or applying unreasonable force may cause trouble or interrupt the measurement.
●Basically, the Bridge Box is designed to be used by connecting a strain gage to the input terminal.
Note that it causes the breakdown when sensors other than the strain gauge are connected.

4
NOTATIONS USED IN THE INSTRUCTION MANUAL
Informational Notes
Certain notations are used as necessary to attract your attention to information that requires special care
when handing the Bridge Box, and to information provided for reference purposes.
Examples of Notations
Essential precautions when handling the Bridge Box.
NOTE
Reference items when handling the Bridge Box.
MEMO

5
1. PRODUCT OUTLINE
1-1 PRODUCT OUTLINE
The Bridge Box is 8-channel type bridge box for strain gage measurement.
Set a gage mode with gage mode switch on the upper face of the Bridge Box and connect a strain gage
to the one-touch type terminal board.
Connect the dedicated cable to an input of the strain meter for the strain gage measurement.
1-2 FEATURES
○User-friendly one-touch type terminal board is adopted.
○Capable of connecting 8-strain gage.
○2-type connection cables to the strain meter are available.
Either one type is included and it is possible to buy these individually.
●N-104 8 NDIS connectors equipped.
●N-105 Connector for the CDV-40B/A equipped.

6
2. PARTS AND FUNCTIONS
1
Terminal
Board
for Connecting Strain Gages
One
-
touch
type
terminal b
oard
(1
-
CH) for connecting the lead w
ire
of the strain gage.
See “3-2 CONNECTING STRAIN GAGE” for the connection.
2
Gage Mode Switch
Sets
the
gage mode with a combination of SW1, SW2 and SW3.
See “3-1 SETTING FORM OF GAGE MODE” or the figure on the
side of the Bridge Box for the setting.
3
Driver Holder
Holder for the accessory small screwdriver that is used for
connecting the strain gage to the one-touch type terminal board.
4
Cable Connecting Connector
Connect the N
-
104 cable or N
-
105 cable.
See “3-3 CONNECTING STRAIN METER.”
5
GND Terminal
A
screw (M3) for the GND terminal.
1
2
34
5
6
7
● Applicable lead wire Solid wire: φ0.4 mm to φ1.2 mm (UL AWG16 to 26)
Stranded wire: 0.2 mm2to 0.75 mm2(UL AWG20 to 24)
ＭＥＭＯ
● For connecting a strain gage, do not connect gage leads (lead wires directly connected from
the strain gage) directly.
● Use a gage terminal and convert the gage leads to the applicable lead wires or use a strain
gage with pre-attached lead cables.
● If you connect gage leads directly, gage leads may be broken since they are too thin.
NOTE

7
6
7
Lead Wire Sample
SELECT LED
Describes how long you have to peel of
f
a
coating
of the lead
wire
that is inserted to the terminal board.
See “3-2 CONNECTING STRAIN GAGE.”
For checking the bridge box connection.
See
“
4
.
SELECT LED
.
”
●Grounding the GND terminal
Be sure to ground the GND terminal.
Or, it may cause an electric shock hazard, lower the performance, and cause trouble.
NOTE
●For the GND terminal
Connect the GND terminal and E (S) terminal (gray) when noisy.
The noise may be reduced.
MEMO

8
3. CONNECTING FORM
3-1 SETTING FORM OF GAGE MODE
The gage mode has 5 types; 1/4 BRIDGE (2WIRE) system, 1/4 BRIDGE (3WIRE) system, 1/2
BRIDGE system, 2GAGE (OPPOSITE) system and FULL BRIDGE system.
The connecting form of the strain gage and setting of gage mode switch (SW1 to SW3) for every gage
system are described as follows. In addition, the same figure is displayed on the side of the Bridge Box.
●1/4 BRIDGE (2WIRE) system ●1/4 BRIDGE (3WIRE) system
●1/2 BRIDGE system ●2GAGE (OPPOSITE) system
●FULL BRIDGE system
●About the E (S) terminal (gray)
Connect the shield wire to the E (S) terminal if the shield wire is included in the gage lead
wire.
The noise might become small.
●About the F terminal (yellow) and G terminal (blue)
The terminals are for the TEDS signal.
Connect a TEDS + signal to the F terminal and connect TEDS - signal to the G terminal.
MEMO

9
●About length in which the coating of the lead is peeled off.
Sample of the applicable peeled off lead wire is described on the Bridge Box with actual
size.
You can check that the actual lead wire is correctly peeled off approx. 10 mm by placing
it.
MEMO
3-2 CONNECTING STRAIN GAGE
2) Insert the lead wire with its coating peeled off approx. 10 mm all the way to its
end into the round hole of the input terminal, with the button pressed.
1) Push the button with the accessory small screwdriver.
●Press the following position.
Be sure to press the above position
with the accessory small screwdriver.
●
For connection, always use the accessory small screwdriver or an
object
with a fine head.
NOTE
Approx. 9 to 10 mm
Lead wire
Sample
Target lead wire

10
3) Release the lock button with the lead wire held in position.
4) Gently pull the lead wire to check if it is securely inserted.
For connection, always use the accessory small screwdriver or an object with a fine head.
MEMO

11
3-3 CONNECTING STRAIN METER
Use the following connector to connect the strain meter.
For the strain meter with NDIS connector. N-104
For the strain meter CDV-40B/A. N-105
Each cable length is 1.5 m.
Since the N-104 or N-105 connector has a lock
function to prevent itself from falling off, the N-104
or N-105 connector is locked just by inserting it.
For releasing, pull the connector with clipping the
release buttons on both sides of the connector.
In addition, the lock screws are also equipped.
You may fix the lock screws with a Phillips-head
screw driver for M2.6.
Connector is not released if you fasten the lock
screws even if the release buttons are clipped.
●About the lock screw.
Usually, the connector is not released since it attaches the lock function even if the lock
screws are not fastened.
However, it is recommended to fasten the lock screws when vibration is applied or to
prevent the connector from nearly falling off when you accidently touch the release
buttons.
MEMO
Release buttons
Lock screw
Lock screw

12
●About the connection part between the N-104 or N-105 connector and cable.
The connector having wide range of connection movement between the connector and
cable is used for the cable.
Therefore, the cable moves up, down, left, or right direction at the connection part.
This is used to release the extra force that is transmitted to the fitting portion of the
connector from the cable.
There’s no need to worry.
MEMO
Connection part between the
connector and cable.
Fitting portion of the connector

13
4. SELECT LED
4-1 OUTLINE
When using multiple Bridge Boxes, by lightening the SELECT LEDs, you can identify which Bridge
Boxes are connected to the target CDV-40B/A.
Connect the Bridge Box to the CDV-40B/A with the N-105 cable for using the SELECT LED.
4-2 WITH THE EDX-3000A/B
Click the Environment icon and select the Configuration tab on the EDX-3000A/B. Double click the
target CDV-40B/A with a Bridge Box on the Conditioner Card column (1) to light up the SELECT LED
in green (the LED will light off in seconds).
Click the (2) Flash button to blink the all SELECT LEDs connected to the EDX-3000A/B in green.
(1)
(2)

14
5. SPECIFICATIONS
1)
Model Name
DB
V
-
120
A
-
8
(For gage resistance 120 ohm, accessory cable
N-104).
DB
V
-
350
A
-
8
(For gage resistance 350 ohm, accessory cable
N-104).
DB
V
-
120
A
-
8C
(For gage resistance 120 ohm, accessory cable
N-105).
DB
V
-
350
A
-
8C
(For gage resistance 350 ohm, accessory cable
N-105).
2)
N
u
mber of Channels
8
3)
Corresponding Input
DB
V
-
120
A
-
8(C)
120 ohm
F
or
1/4 BRIDGE
(2WIRE)
s
ystem
120 ohm
F
or
1/4 BRIDGE
(3WIRE)
s
ystem
60
to 1k
ohm
F
or
1/
2
BRIDGE
s
ystem
120 ohm
F
or
2GAGE
(OPPOSITE)
s
ystem
60
to 1k
ohm
For
FULL BRIDGE
s
ystem
DB
V
-
350
A
-
8(C)
350 ohm
For
1/4 BRIDGE
(2WIRE)
s
ystem
350 ohm
For
1/4 BRIDGE
(3WIRE)
s
ystem
60
to 1k
ohm
For
1/
2
BRIDGE
s
ystem
350 ohm
For
2GAGE
(OPPOSITE)
s
ystem
60
to 1k
ohm
For
FULL BRIDGE
s
ystem
4)
Gage Connection Terminal
One
-
touch
t
ype terminal board
5)
SELECT LED
For checking the bridge box connection.
6
)
Accessory Cable
N
-
104:
1.5
-
m long
8 NDIS connectors
equipped
at the tip.
N
-
105:
1.5
-
m long
Dedicated connector f
or th
e CDV
-
40B/A
equipped
.
7)
Operating
Temperature
and Humidity Range
0 to 40
°
C, 20 to 80% (noncondensing)
8
)
Vibration Resistance
29.4 m/s
2
(3G), 5 to 200 Hz
9
)
Dimensions
286 (W) × 22 (H) × 61.4 (D) mm
(excluding protrusion)
10
)
Weight
Approx. 480 g
11)
Available
wires
Solid wire
φ
0.4mm to
φ
1.2mm (UL AWG16 to 26)
Stranded wire
0.2mm
2
to 0.75mm
2
(UL AWG20 to 24)

15
6. FOR SCREW HOLES ON BOTTOM PANEL
Four holes for M3 screws are arranged on the bottom panel of the Bridge Box.
The screw holes are for fixing the Bridge Box with the fixing screws.
Depth of the screw holes are 6 mm.
In addition, put the accessory rubber feet (4) when not using the holes.
(Unit: mm)
8.8 260 (17.2)
8.245
(8.2)
The screw hole sizes are M3, 6-mm depth.
Do not use screws longer than the recommended size.
Or, it may cause trouble.
NOTE

16
7. FOR OUTSIDE DRAWING AND DIMENSIONS OF BRIDGE BOX
MOUNTING BOARD
The following figure is an example of the bridge box mounting board using the screw holes on the
bottom panel of the Bridge Box.
Refer to the following figure.
Use four flat countersunk screws M3 with length (board thickness (t) + 4 to 6 mm) for mounting the
following mounting board to the Bridge Box.
(Example)
For the board thickness (t) = 2 mm, the screw length should be within 6 to 8 mm.
(Unit: mm)
Countersink (from the back)
Board thickness t = 2.0 or more
Bridge Box fixing hole
Entire unit fixing hole
Note: Shadow area indicates the Bridge Box.

17
8. OUTSIDE DRAWING
DBV-120A-8 and DBV-350A-8 (Unit: mm)
N-104 Cable
N-105 Cable
1.5m
1.5m