Minebea CSA-528-80-4 User manual

III
TRANSMITTER
CSA-528-80-4
CSA-528-80-2
CSA-528
Instruction Manual
EN294-1471C

I
Forward
Than you very much for purchasing the transmitter, model CSA-528-80-4, CSA-528-80-2 and
CSA-528. This manual explains installation procedures and connecting method and also operating
method for the transmitter. Make use of it properly after reading through the manual carefully. This
manual is intended for the technical experts to read.
Marks and arrangements used in this manual
The following marks are put to the explanation on the matters that indicate “Do not do this.”,
“Take care” and “For reference”.
Be sure to read these items where these marks are attached.
Warning
Caution
Warning may cause injury or accident that may harm to the operator。
Do not do these things described here.
It is a description when the occourence only of the assumption of danger by which the user owes injury when handling is mistaken, and the
material damage is assumed。
It is attention and a limitation in the operation and work
Be sure to read the items to prevent the malfunction..

IIII
For safe operation
Be sure to read this instruction manual before use.
1. Instration place
Caution
● Environmentaltemperature : －10 ℃ to 50 ℃
● Environmental humidity : 85 %RH or less (No condensing)
Warning
① Installation probhibition place.
● Do not locate the instrument in direct sunshine and/or high temperature area.
● Do not use the instrument in the high humid area.
● Do not install the instrument in the place with the vibrations and shock.
● Do not use the instrument where there is excess of dusts and fine particles.
● Do not use the instrument where there are corrosive gas and salt and like that.
● Do not install the instrument where there is rapid charge of temperature and humidity.
● Do not install the instrument near the devices that are magnetized or generate an electromagnetic field.
● Do not install the instrument where the instrument may be affected by radioactivity or radial rays.
● Avoid the location where chemical reaction may take place such as in a laboratory, or like that.
The temperature and humidity must use it in the place within the following ranges.
Do not set up this instrument in the following places. It might cause an unexpected faulty in the instrument.

III
② When you set up this instrument
Caution
Each outline CSA-528 of the instrument and required dimensions for the environmental spaces are as follows:
Install based on the following sizes to set up this instrument, and secure the space for surroundings of this container.
Unit：mm

IVI
V
2. Power supply
Warning
Warning
Caution
3. Application note
Caution
Caution
Caution
Caution
Install each cable while turned off the power supply. Might it get an electric shock, and this instrument be damaged when working with the
power supply enters.
Confirm the power supply voltage of the instrument and the specifications are corresponding to the supplied power supply before turning on the
power supply. Consult with us when not matching. There is danger of causing damage and the electric shock of this instrument when using it
like the uncertainty.
Groundline should be connected ground securely. When groundline is not connected, it may cause a malfunction of the instrument or electric
shock to the operator
Before this instrument is newly used, or when the strain gage applied transuducer is exchanged with a new one, please execute the calibration.
If not calibrating, it may cause not obtaining the correct measurement result, or a malfunction in the instrument and there is a possibility of the
damage of peripherals. Moreover, there is a similar possibility that the result is incorrect even if the calibration has been already made. Please
take the calibration again.
It causes not obtaining a correct measurement result, and the malfunction when the setting change is carelessly executed while measuring it
with this instrument and there is a possibility of the damage of peripherals.。
Please confirm connecting wires is correctly executed when you use this instrument. If it is not connected correctly, it may cause the
malfunctions on the instrument, and the damage to the peripheral equipments or even worse serious accidents.
Please do not give the impact such as throwing the thing at this instrument.
There is a possibility of causing the malfunction on this instrument, or causing the damage of the electric circuit.

V
History of revision
Date Manual No. Revision reason (Contents)
2011/05 DRW. NO EN.294-1471 First version
2016/06 DRW. NO EN.294-1471A
Due to ECN No, FN16-02057
-Deletion-
Delete 'Minebea Co., Ltd. Measuring Components Business
Unit' from the front cover.
Due to ECN No,FN10-02140-E
-Change-
Minebea logo is changed.
2017/01 DRW. NO EN.294-1471B
Due to ECN No, FN17-02014
-Addition-
5-3. Standard specification at the time of shipment
・Sensitivity 10 V output at the input of 1 mV/V
2017/08 DRW. NO EN.294-1471C Due to ECN FN17-02017
・Delete the company name in the contents.

VI
V
I

V
II
Index
FORWARD .......................................................................................................................................................................................................... I
MARKS AND ARRANGEMENTS USED IN THIS MANUAL ............................................................................................. I
FOR SAFE OPERATION .......................................................................................................................................................................... I I
1. INSTRATION PLACE .................................................................................................................................................................................... II
2. POWER SUPPLY ........................................................................................................................................................................................ IV
3. APPLICATION NOTE ................................................................................................................................................................................ IV
HISTORY OF REVISION ......................................................................................................................................................................... V
１． EACH FUNCTION AND NAME............................................................................................................................................... 1
２． CONNECTING METHOD ............................................................................................................................................................ 3
２-１. LAYOUT OF THE TERMINAL BOARDS ........................................................................................................................................ 3
２-２. NOTE ON CONNECTION.................................................................................................................................................................... 3
２-３. CONNECTION ........................................................................................................................................................................................ 4
３． CALIBRATION .................................................................................................................................................................................... 8
３-１. CALIBRATION METHOD .................................................................................................................................................................... 8
３-２. CLIBRATION PROCEDURES ............................................................................................................................................................. 9
３-３. ZERO ADJUSTMENT BY MOUNTING RESISTANCE ............................................................................................................ 11
４． TROUBLE SHOOTING .............................................................................................................................................................. 14
５． SPECIFICATIONS ......................................................................................................................................................................... 20
５-１. SPECIFICATIONS .............................................................................................................................................................................. 20
５-２. GENERAL SPECIFICATIONS ......................................................................................................................................................... 20
５-３. STANDARD SPECIFICATION AT THE TIME OF SHIPMENT ............................................................................................. 20
５-４. ACCESSORIES .................................................................................................................................................................................. 20
６． WARRANTY ..................................................................................................................................................................................... 21
６-１. WARRANTY ....................................................................................................................................................................................... 21
６-２. REPAIR ................................................................................................................................................................................................. 21

1
１．Each function and name
This instrument is a transmitter for the application of strain gage applied transducer.
It can obtain the analog output corresponding to the load, pressure, and the torque, etc., by
amplifying the output of various strain gage applied transducers.
①”CALIB” switch
Used when the CALIB value is turned on or off.
②”ZERO” trimmer
Adjust Zero balance voltage.
③”SPAN” trimmer
.Adjust output voltage by load.
④ Terminals
DC power supply, the ground line, the output voltage signal line, and the strain gage
applied transducer are connected.

22
⑤Case
The case is available for use to DIN rail.
Never fail to connect ground line with the common earth in front of the case.
It will be D type single earth.
P/N：CSA-528-80-4, Installed CSA-528, 4 pcs.
P/N：CSA-528-80-2, Installed CSA-528, 2 pcs.

3
２．Connecting method
２-１.Layout of the terminal boards
No Name of
terminals Description Applications
1 A Bridge power
supply(＋)
Strain gage applied
transducer
2 B Amplifier input(－)
3 C Bridge power
supply(－)
4 D Amplifier input(＋)
5 E Shield
6 V+ Output voltage
terminal(＋) Output voltage
7 V- Output voltage
terminal(－)
8 DC24V(+) DC power supply input
(＋)
Power supply
9 DC24V(-) DC power supply input
(－)
10 F.G. F.G.
Caution
２-２.Note on connection
● Be sure to set the power supply to OFF, when the connection is made.
● Do not turn on the power supply until complete installing.
● The terminal boards front of the instrument is made of resin, take care not to drop
it down or not to apply strong impact.
● The electric wire which suits the terminal block of this unit is 0.08 mm2/AWG28 to
2.5 mm2/AWG14.
● The electric wire bare length is 8 mm to 9 mm.
● Connecting cable with the instrument should be away from the noise source such
as power supply line and/or I/O line for control and so on as far as possible.
● Conduit wiring should be the type of exclusive one, and avoid using with another
line together.
● Be sure to connect earth. It should be D type single earth.
● All of the connections should be executed securely by referring to the Instruction
manual for the instrument.
Isolated output voltage (-) and DC 24V (-).
"C" of bridge power supply (－) and "V－" of output voltage terminal are connected internally.
In case of connection with the instrument, keep strictly to the following items.
If neglected, it may cause an unexpected failure or damage to the instrument.

44
２-３.Connection
２-３-１.Connection with strain gage applied transducers
The instrument can connect with strain gage applied transducers, such as load
cell, pressure transducer and so on.
Connection with 1 piece of load cell and CSA-528
※１ When tension is applied with the application of tension type or universal (compression /tension) type of load cell,
 and display of ”+”  direction is required, connect ”Green” with Terminal B  and ”Blue” with Terminal D
individually. As there is a case which standard wiring color is different, please confirm the inspection data sheet
of the load cell being used.
※２ When the length of CAB-502 is more than 30 m totally, there may have the case that the accuracy is out of
warranty because the resistance of cable makes the input voltage of the instrument decreased.
※３ When the length of CAB-502 is more than 10 m totally, or the zener barrier is used in the system, CALIB is not
applicable.

5
This instrument is avairable to connect with extension type junction box B-304B.
Connect of one gage type transducer, junction box B-304, and CSA-528.
Internal terminal connection of B-304
When the total length of CAB-502(our company acknowledged 4 wire type) specifies more than 30 m, the accuracy
may be out of warranty because the resistance of cable makes decrease the input voltage of the instrument.
Strain gage type transducer

66
２-３-２.Connecting output voltage
Connecting output voltage
Caution
Connection with output voltage should be made securely as the figure indicates and also used within rated
capacity for contact.
If neglected, it may cause an unexpected failure or damage to the instrument.
When connect with output voltage, be sure to apply shielded cable, and shielded cable should be connected with
F.G. terminal of the instrument.
If neglected, it may cause an unexpected malfunction due to the effects of noise from other equipments.

7
２-３-３.Connection with power supply and ground
Connection with power supply and ground should be made as the following figure.
Grounding should be the D class with single earth.
Caution
Grounding should be the D class with single ground.
If neglected, it may cause an unexpected malfunction due to the effects of noise from other equipments.
Connection with power supply and ground should be made securely as the figure indicates and also should be used
within the specified condition of power supply.
If neglected, it may cause an unexpected failure.

88
３．Calibration
３-１.Calibration method
Load calibration procedures for the instrument are two as follows:
① Calibration by the actual load
② Electronic calibration by CALIB input.
Caution
According to the Chapter 2 “Connecting method”, connect the instrument and the strain
gage applied transducer properly, then supply the power.
Before using the new instrument or after exchanging the strain gage applied transducer with a new one, be sure to
make calibration.
If calibration is not made, correct measured results may not be obtained, or it may cause malfunction to the
instrument and it may damage the peripheral equipment.
Moreover, even if calibration has made, there may occur the similar case as above when the result is not correct. So
make precise calibration again.
In the calibration for CALIB input, the accuracy is 1/500 or so.

9
３-２.Clibration procedures
３-２-１.Calibration by the actual load
Procedure1 Connect the instrument and
strain gage applied transducer.
Procedure2 To stabilize this unit and the measuring section
(loadcell), please make the instrument to
the status of energiging for about 20 min.
Procedure3 Set the strain gage applied transducer to the condition
at initial load (tare weight). When the initial load
(tare weight) is exceeding the ±0.25 mV/V at the
input conversion, cancel the initial load (tare weight)
referring to the paragraph 3-3.
Adjust the output voltage value to 0.000 V with
“ZERO" trimmer.
Procedure4 Put the rated load (pressure) on the strain gage applied
transducer, and 
adjusts the SPAN" trimmer to become
the output voltage value to be set.
Procedure5 After removing the standard weight set on step 3,
confirm the output voltage value to be at 0.000 V.
If not, return to the step 3.
Procedure6 Please complete from the calibration mode by actual
load.
Zero output adjustment
Span adjustment (output)
Zero output checking
Connecting of strain gage
applied transducer
Energiging for 20 min after
power is turned on.
Complete the calibration

1010
３-２-２.Calibration by CALIB input
Procedure1 Connect the instrument and
strain gage type transducer.
Procedure2 To stabilize this unit and the measuring section (load
cell), please make the instrument to
the status of energiging for about 20 min.
Procedure3 Set the strain gage applied transducer in the condition
of the initial load (tare weight).
When the initial load (tare weight) is exceeding ±0.25
mV/V at the input conversion, cancel the initial load
(tare weight) referring to the paragraph 3-3.
Procedure4 Turn on the "CALIB" switch.
Be able to get the output equivalent to the calibration
value at 0.5 mV/V±0.001 mV/V
The output voltage value corresponding to the CALIB
value is calculated from the rated load value, the rated
output value, the maximum load value, and the output
voltage value of the connected strain gage applied
transducer at that time.
Adjust the output voltage value to become the

calculated value by using the ”SPAN” trimmer.
Calucuration example for CALIB equivalent to output
value
The calculation example when the output voltage of
10.000 V is required at the maximum load of 0.34 t in
the condition of using one point of transducer with the
rated capacity 1 t, rated output 3 mV/V.
Rated capacity of transducer (load) 1ton
Rated output of transducer 3mV/V
Max load 0.34ton
Output voltage value at Max load 10.000V
CALIB value 0.5mV/V
(Output voltage value of max load)
(Rated output of transducer)×(Max load)
(Rated capacity of transducer)
3mV/ V×0.34ton
1ton
＝ 1.02mV/V
Zero output adjustment
Span adjustment (output)
Connecting of strain gage
applied transducer
＝
＝
Energiging for 20 min after
power is turned on.